Jo-Bell Products Products has been producing liquid level controls since 1947, and was orginally located in Oak Lawn, Illinois. It has an installed base of hundreds of thousands of

Jo-Bell ProductsDIVISION OF DALNOR SYSTEMS, INC.

5325 Sierra Vista DriveCarlsbad NM, 88220Phone: 575-628-0675

Fax: 575-628-0679

Jo-Bell Products has been producing liquid level controls since 1947, and was orginally located in Oak Lawn, Illinois. It has an installed base of hundreds of thousands of products operating throughout the world. Jo-Bell was acquired in 2000 and moved to Carlsbad, New Mexico, where it now operates as a division of Dalnor Systems, Inc.

From food to oil to nuclear applications, in environments from acidic salt to ordinary water, Jo-Bell has a solution to match your requirements. Jo-Bell engineering is available to customize products to your special needs and is continually improving its current product lines and processes.

This catalog presents typical product o�erings and is not intended to be all-inclusive. Dimensional drawings are available on our website:

www.jobellproducts.com2

Internal Liquid Level Control - Type A Standard Features* 2-1/2” NPT Mounting Connection* 8-3/4” Insertion* 1-1/2” to 5” Adjustable Di�erential Range* 0.8 Minimum Speci�c Gravity* 1/2” NPT Conduit Connection

Available Product Options* Minimum Speci�c Gravity* Switch* Switch Housing* Insertion Length* Dog-Legged Float Rod

Description:

The Type A is an internal service, horizontally mounted liquid level control. The control features include a �eld adjustable di�erential of 1-1/2" to 5", with options up to 23". The 2-1/2" NPT threaded control body will mount easily to the side of any tank or vessel. Models are available for service of 30, 300 or 500 psig and speci�c gravity as low as 0.5.

Features:

Body: The threaded body is standard in brass or 316 SS, depending on the model selected.

Float: A 2-1/2" round �oat is standard in copper clad. A 316 SS �oat is available at added cost.

Trim: The �oat rod and its related hardware are standard in brass or 316 SS, depending on the model selected.

Mounting: The connection is 2-1/2" NPT. The control must be installed through a half-coupling. A full coupling interferes with the operation of the �oat mechanism.

Insertion Length: The standard insertion is 8-3/4" as measured from the face of the control to the end of the �oat(s). Minimum insertion is 6"; maximum insertion is 26-1/2".

Di�erential: With the standard insertion, the �eld adjustable di�erential is 1-1/2" to 5". For greater di�erential, additional insertion length is required. By adding 1" of insertion, approximately 1/8" of di�erential is added. High level actuation will occur at approximately 1/2" above the centerline of the control. Di�erential adjustment changes the low level point only.

Switch Housing: A NEMA 4 (water-tight and dust-tight) or NEMA 7 (explosion-proof) housing is available.

Conduit Connection: 1/2" NPT.

Special Construction: Low Speci�c Gravity: For application with speci�c gravity of 0.5 to 0.79, two (2) 2-1/2" round �oats are supplied. The insertion length is not increased.

Dog-Legged Float Rod: The �oat rod is bent so the high level point is below the face of the control. Typically the Type A should not be used with liquids containing magnetic particles and/or liquids which will build up on the face of the control.

Optional Features:

Insertion Length from 6" to 26-1/2" Dog-Legged Float Rod Minimum Speci�c Gravity of 0.5

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Internal Liquid Level Control - Type AF & ASF Standard Features* 4" Mounting Flange* 8-3/4" Insertion* 1-1/2" to 5" Adjustable Di�erential Range* Stainless Steel Float and Trim* 0.8 Minimum Speci�c Gravity

Available Product Options* Minimum Speci�c Gravity* Switch, Switch Housing* Body, Float, Trim, Insertion Length* Dog-Legged Float Rod* Flange Size, Flange MaterialDescription:

Types AF & ASF are internal service, horizontally mounted liquid level controls. They mount to a companion �ange on the side of a tank or vessel. The controls feature a �eld-adjustable di�erential of 1-1/2" to 5" with options to 23". Models are available for service of 150 or 300 psig; operating temperature to 400°F; and speci�c gravity as low as 0.5.

Features:Flanges: Four inch 150# or 300# ANSI RF �anges are standard with the AF and ASF. The Type AF has a carbon steel �ange; the type ASF a 316 SS �ange. Flanges of other sizes (3" minimum) and material are available.

Body: The 316 SS body is mounted to a threaded �ange.

Float: A 2-1/2" round �oat is standard in copper. A 316 SS �oat is available at added cost.

Trim: The �oat rod and its related hardware are standard in brass or 316 SS, depending on the model selected.

Mounting: The Types AF and ASF will mount to a mating �ange on the tank or vessel.

Insertion Length: The standard insertion is 8-3/4" as measured from the face of the control to the end of the �oat(s). Minimum insertion is 6"; maximum insertion is 26-1/2".

Di�erential: With the standard insertion, the �eld adjustable di�erential is 1-1/2" to 5". For greater di�erential, additional insertion length is required. By adding 1" of insertion, approximately 1" of di�erential is added. High level actuation will occur at approximately 1/2" above the centerline of the control. Di�erential adjustment changes the low level point only.

Switch Housing: NEMA 4 (water-tight and dust-tight) or NEMA 7 (explosion-proof) housings are available.


Special Construction: Low Speci�c Gravity: For application with speci�c gravity of 0.5 to 0.79, two (2) 2-1/2" round �oats are supplied. The insertion length is not increased.

Dog-Legged Float Rod: The �oat rod is bent so the high level point is below the face of the control. Typically the Type AF and ASF should not be used with liquids containing magnetic particles and/or liquids which will build up on the face of the control.

Optional Features:

Insertion Length from 6" to 26-1/2" Dog-Legged Float Rod Minimum Speci�c Gravity of 0.5 Flange Size from 3" Minimum

4

Liquid Level Control - Type BAC

Standard Features* Stainless Steel Float, Rod, Enclosing Tube & Frame* Te�on Coated 430 SS Actuator Piston* SPDT (NO/NC) Switch* 1/2" Male NPT Conduit Connection

Description:

The Type BAC is a liquid level �oat switch used on evaporative cooling units to give an electrical signal at a predetermined high or low water level. The �oat ball, �oat rod, enclosing tube and frame are all fabricated from 316 series stainless steel. The switch-actuating piston is fabricated of 430 stainless steel and Te�on coated. The unit is supplied with a SPDT switch allowing the wiring con�guration to use normally open or normally closed contacts.

Features:Body: The open style body of the BAC is fabricated from 316 SS.

Float: One 3-1/2" round 316 SS �oat is standard.

Trim: The �oat rod and its related hardware are standard in 316 SS.

Mounting: Two 10-32 through holes are provided on 3" centers.

Immersion Depth: The standard and minimum immersion depth is 6 inches. Maximum immersion is 14-1/2".

Conduit Connection: 1/2" male NPT.

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External Liquid Level Control - Type CB Standard Features* Carbon Steel Float Chamber* 8-3/4" Insertion* Stainless Steel Float and Trim* 1" Process Connections* 1" Switch Di�erential* 3/4" NPT Conduit Connection* Removable ANSI-rated Head Flanges

Available Product Options* NEMA 4X or 7/4X Switch Housing* Female, Socket Weld, or Flange Process Connections* Stainless Steel Float Chambers* SPDT, DPST or DPDT Switch Circuit* Multiple Switches* Electronic, Solid State, or Pneumatic Switching Operation* Minimum Speci�c Gravity to 0.375* Cooling Fins for High Temperature Applications up to 1000°F* Interface Operations* Wide Di�erential* Breather and Drain for NEMA 7/4X SwitchHousing* 1/2" NPT or M20 Conduit Connection

Description:

The Type CB is an external service, side mounted liquid level control. Models are available for service to 800 PSIG; operating temperature to 1000°F with cooling �ns; and speci�c gravity as low as 0.375. The many optional and special constructional features make the Type CB practical for a wide range of applications.

Features:Float Chamber: The chamber is standard in carbon steel pipe. At extra cost, it can be supplied in 304 or 316 SS. Contact the factory for availability of, and quotation for, other materials. The �oat chambers have a �ange removable head. See the Type S if all-welded construction is required (for operating pressures above 800 psig).

Chamber Gasket: A �exitallic gasket is standard.

Float: Float material is standard in 316 SS.

Trim: The trim, which includes the �oat rod with its related hardware and the enclosing tube assembly, is standard in 316 SS.

Process Connections and Mounting: The standard connections are 1" located on the side and bottom having an 11-1/2" centerline dimension. Male connections usually ease �eld installation by eliminating the need for an extra union. Other connections are available as follows: female, socket weld, or �ange. Refer to the Dimensional Data for the standard centerline dimension of these connections. Specify in the RFQ if a di�erent centerline dimension is required. All connections can be supplied in sizes up to 3".

Di�erential: With a single switch, the standard di�erential is approximately 1". Wide di�erential options are available. Field adjustment of the actuating points can be made by raising or lowering the switch on the enclosing tube.

Switch Housing: A NEMA 4X (water-tight, dust-tight, and corrosion-resistant) or NEMA 7/4X (explosion-proof and NEMA 4X) housing is available.

Conduit Connection: 3/4" NPT

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Special Construction: Wide Di�erential: For applications with a di�erential greater than provided by the standard model, the following options are available:

1) Tall Housing: With two (2) switches within a tall switch housing, up to 5" of di�erential can be obtained. Tall housings are not available for NEMA 7 A&B service.

2) “GK” Assembly: For a di�erential from 5" minimum to 24", the "GK" assembly can be used. This arrangement consists of two (2) separate NEMA 7 C&D (explosion-proof) switch housings, each containing one electrical switch. The distance, on the enclosing tube, between the horizontal centers of the housings is the di�erential distance. The distance is factory set, and cannot be adjusted. In order to accommodate the extended head of this design, the room above the tank mounting location must exceed the di�erential by at least 8". Switches for the "GK" assembly require a special enclosing tube mounting clamp due to the limited room in the smaller explosion-proof housing. Part numbers have been assigned to re�ect the di�erence in clamps.

The "GK" assembly can also be used for applications with three or more level points. Minimum distance between levels is 5".

3) Tandem Floats: A factory set wide di�erential of 10" minimum to 36" maximum can be obtained by using a tandem �oat arrangement. This design uses two (2) �oats in an extended �oat chamber and two (2) switches in a standard switch housing. Each �oat has its own rod, piston and switch to actuate. The solid �oat rod of the lower �oat passes through the tube of the upper �oat. The lower �oat actuates the upper switch, and the upper �oat actuates the lower switch.

4) Sliding Piston: With this design, the piston travels along the rod, making contact with high and low-level stops. The magnet is strong enough to hold the piston in place while the liquid level raises and lowers the rod. The maximum di�erential with this design is 6".

High Pressures: For �oat-type control applications with operating pressures of 1000 PSIG to 1500 PSIG and self-purging �oats not being suitable, see the Type S.

Note: Type CB level controls manufactured before March 1, 2000 might not match the current speci�cations. However, replacement controls can be built to retro-�t the existing, as long as a complete description is provided. The serial number and other nameplate data will aid in specifying replacement units.

Optional Features:Cooling Fins: For application with a process temperature above 400°F, up to 1000 °F (depending on the switch selected), cooling �ns are used to dissipate the heat which would otherwise be transmitted to the switches.

Breathers and Drains: These can be supplied on NEMA 7 C&D explosion-proof housings. Two con�gurations are available: manual or universal. The latter design allows air circulation through the housing and is recommended when cooling �ns are used.

Interface: The controls are available for interface service. The di�erence in speci�c gravities between the two liquids must be 0.20 or more. The �oat for interface service is weighted in order to sink in the lighter liquid, but �oat in the heavier liquid. If the di�erence is between 0.12 and 0.19, a custom design is available.

7

External Liquid Level Control - Type F

Standard Features* Carbon Steel Chamber* Stainless Steel Float and Trim* 1/2" NPT Female Process Connections* 0.7 Minimum Speci�c Gravity* 3/4" NPT Conduit Connection for NEMA 7/4X Switch Housing

Available Product Options* SPDT, DPST or DPDT Circuit* 250 or 1500 PSIG Models* 0.5 Minimum Speci�c Gravity* Stainless Steel Float Chambers* Breather and Drain for NEMA 7/4X Switch Housing* 1/2" NPT or M20 Conduit Connection

Description:

The Type F is an economical externally mounted liquid level control. It's ideally suited for applications where the control is located in a remote area or operated for extended periods while left unattended. The Type F provides the reliable performance needed with no maintenance. The ease of installation and economical price make replacement less costly than repair. Models are available for service of 250 or 1500 PSIG; operating temperature of 250°F and speci�c gravity of 0.7. Contact the factory for applications requiring 0.5 minimum speci�c gravity.

Features:Float Chamber: The all-welded body is constructed from carbon steel pipe. At extra cost, it can be supplied in 316 SS. Contact the factory for availability of, and quotation for, other materials.

Float: A 316 SS �oat is provided. The 1500 PSIG unit is supplied with a self-equalizing �oat assembly.

Trim: The �oat rod, its related hardware, and enclosing tube are 316 SS.

Process Connections and Mounting: The Type F is mounted externally to the tank or vessel using 1/2" female connections located on the side and bottom.

Di�erential: The di�erence between switch actuation and reset is approximately 1". The actuation point and di�erential cannot be adjusted.

Switch Housing: A NEMA 4X (water-tight, dust-tight) or NEMA 7/4X (explosion-proof and NEMA 4X) is available.

Conduit Connection: 3/4" NPT on NEMA 4X and NEMA 7/4X switch housings.

Optional Features:Speci�c Gravity: 0.5 minimum speci�c gravity operation is available according to application requirements.


Other Optional Features:

250 or 1500 PSIG Models 1/2" NPT or M20 Conduit Connection

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Internal Liquid Level Control - Type FL Standard Features* 4" 150# ANSI RF Carbon Steel Mounting Flange* Porcelain Displacers* 10 Feet 316 SS Cable* Inconel Spring* 3/4" NPT Conduit Connection

Available Product Options* Other Mounting Flanges - Size, Rating, Material* 3" NPT Mounting Connection* Stainless Steel Displacers* SPDT, DPST or DPDT Switch Circuit* Pneumatic Switch Operation* NEMA 4X or 7/4X Switch Housing* Cable Length from 4 to 50 Feet* Multiple Switch Function* 1/2" NPT or M20 Conduit ConnectionDescription:

The Type FL is a top mounted displacer control. The "FL" can be used in a wide variety of applications. This control is available for models with up to 3 switches and �eld adjustable di�erential. The "FL" can be used for applications with immersion depth to 50 feet.

Features:Mounting: The standard mounting connection is 4" 150# ANSI RF carbon steel �ange. Other sizes (3" minimum), material and/or pressure ratings are available. The control can also be supplied with a 3" NPT connection.

Displacers: Porcelain displacers are standard. Stainless steel is available at extra cost.

Trim: The rod, spring, and related hardware are standard in 316 SS. The spring is standard in inconel.

Immersion: Ten feet of cable is standard. Longer or shorter cables are available; from 4 feet to a maximum of 50 feet.

Di�erential: The di�erential can be either narrow or wide, depending on the model selected. With the single stage control, the minimum di�erential is approximately 4". The location of the level points is adjustable. The minimum high level is 6".

Switch Housing: A NEMA 4X (water-tight, dust-tight and corrosion-resistant) or NEMA 7/4X (explosion-proof and NEMA 4X) housing is available.


Cable: Standard 10' 316 SS. See Options.

Optional Features: Other mounting �ange, size, rating and/or material. 3" or 4” NPT connection. Cable length from 4 feet to 50 feet. 1/2" NPT or M20 conduit connection.

Operation: The operation of a displacer control di�ers from a �oat control, because the operation is based on weight displacement rather than buoyancy. In the low level position, the weight of the displacers will expand the displacer spring and keep the actuating piston out of the magnetic zone of the switch. As the liquid rises, it begins to displace the weight of the displacers. The spring senses the weight change and will compress. In doing so, the spring will lift the actuating piston into the magnetic operating zone of the switch. When the level reaches the mid-point of the upper displacer, the switch will actuate. As the level descends, the switch will stay actuated until the level reaches the lower displacer. The weight of the displacers expands the spring, pulling the piston out of the operating zone.

9

Internal Liquid Level Control - Type KC

Standard Features* 1" NPT Mounting Connection* Stainless Steel Wetted Parts* 1" Switch Di�erential* # 3/4" NPT Conduit Connection

Available Product Options* Flange Mounting* SPDT, DPST or DPDT Switch Circuit* Multiple Switches* Pneumatic Switch Operation* NEMA 4X or 7/4X Switch Housing* Cooling Fins for High Temperature Applications* Float Size* Breather and Drain for NEMA 7/4X Switch Housing* Wide Di�erential* Immersion Length as Required* 1/2" NPT or M20 Conduit Connection

Description:

The Type KC is a versatile internal service, top mounted liquid level control. With its many optional features, the "KC" can be used for a wide variety of applications. Its simple mounting makes it adaptable to many installations.

Features:

Float: The �oat will vary in shape and diameter depending on the speci�c gravity of the liquid, and the immersion length. The standard �oat material is 316 SS.

Trim: The trim is the �oat rod and its related hardware. These are standard in 316 SS.

Mounting: The standard connection is 1" NPT, mounting on the tank or vessel top. When installing, the �oat must be removed, the control inserted into the vessel and the �oat re-attached. Flange mounting is an optional feature. A suitable �ange will allow installation of the control without removal and reassembly of the �oat.

Immersion Length: The standard immersion is 12" as measured from the bottom of the mounting threads or face of the �ange, if applicable, to the bottom of the �oat. The control can be set to a speci�c high or low level point. These points are also measured from the bottom of the mounting threads and must be speci�ed in the RFQ. Immersion length to 36" is cataloged. Longer lengths are available.


Switch Housing: A NEMA 4X (water-tight, dust-tight, and corrosion-resistant) or NEMA 7/4X (explosion-proof and NEMA 4X) housing is available.

Conduit: 3/4" NPT.

Optional Features: Cooling Fins: For application with a process temperature above 400°F or 600°F (depending on the switches selected), cooling �ns are used to dissipate the heat which would otherwise be transmitted to the switches.

Removable Float Assembly: In viscous liquids, frequent cleaning may be required. To facilitate this as well as prevent damage to the control while cleaning, the �oat assembly can be removable. When this option is supplied with the 1" NPT mounting connection, the control will be suitable for atmospheric pressure. Flange mounted controls are typically supplied with this option.

10

Special Construction: Wide Di�erential: For applications with a di�erential greater than provided by the standard model, the following options are available:


2) “GK” Assembly: For a di�erential from 5" minimum to 24", the "GK" assembly can be used. This arrangement consists of two (2) separate NEMA 7 C&D (explosion-proof) switch housings, each containing one electrical switch. The distance, on the enclosing tube, between the horizontal centers of the housings is the di�erential distance. The distance is factory set, and cannot be adjusted. In order to accommodate the extended head of this design, the room above the tank mounting location must exceed the di�erential by at least 8". Switches for the "GK" assembly require a special enclosing tube mounting clamp due to the limited room in the smaller explosion-proof housing. The basic switch is the same as those used on the standard models. The "GK" assembly can also be used for applications with three or more level points. Minimum distance between levels is 5".


11

Internal Liquid Level Control - Type KT Standard Features* 4" 150# ANSI RF Carbon Steel Mounting Flange* Stainless Steel Float and Trim* Two Electrical Switches* Factory Set Level Points* Minimum Speci�c Gravity of 0.7* 3/4" NPT Conduit Connection

Available Product Options* Other Mounting Flanges - Size, Rating & Material* NEMA 4X or 7/4X Switch Housing* SPDT, DPST or DPDT Switch Circuit* Cooling Fins for High Temperature Applications* Immersion to 100"* Breather and Drain for NEMA 7/4X Switch Housing* 1/2" NPT or M20 Conduit Connection

Description:

The Type KT is a top mounted, internal service, tandem �oat for wide di�erential applications. Each control has two electrical switches and two �oats. Each �oat has its own switch to actuate. The solid rod of the lower �oat passes through the tube of the upper �oat. The lower �oat actuates the upper switch, and the upper �oat actuates the lower switch. The factory set di�erential can range from 10" to 92". Models are available for service to 150 psig, operating temperature to 1,000°F with cooling �ns, and speci�c gravity as low as 0.7.

Features:

Flange: The standard mounting �ange is 4" 150# ANSI RF carbon steel. Contact the factory for quotation on custom and other �anges.

Floats: All �oats are standard in 316 SS. Depending on the speci�c gravity of the liquid, and the immersion depth, the size and diameter of the �oats will vary.

Trim: The �oat rod and tube assemblies, �oat guide and enclosing tube assembly are standard in 316 SS.

Level Points and Immersion: The level points are factory set and cannot be changed or adjusted in the �eld. The minimum high level is 4" below the face of the mounting �ange. The maximum low level is 96". The minimum distance between level points is 10". The immersion depth is the distance from the face of the mounting �ange to the bottom of the lower �oat in the down position. This length will be approximately 4" longer than the low level point.

Switch Housing: A NEMA 4X (water-tight, dust-tight and corrosive-resistant) or NEMA 7/4X (explosion-proof and NEMA 4X) housing is available.

Conduit: 3/4" NPT.

Optional Features: Cooling Fins: For applications with a process temperature above 750°F (depending on the switches selected), cooling �ns are used to dissipate the heat which would otherwise be transmitted to the switches.

Breathers and Drains: These can be supplied on explosion-proof housings. Two con�gurations are available: manual or universal. The latter design allows air circulation through the housing and is recommended when cooling �ns are used.

Switch Operation: Rather than the standard high and low level service operation, the switches can be set for high and high/high or low and low/low service. This must be speci�ed in the RFQ.

Other: The Type KT is not limited to 150 psig maximum pressure or 0.75 minimum speci�c gravity.

12

Internal Liquid Level Control - Type MT Standard Features* Stainless Steel Body, Float, & Trim* 1/4" Fixed Di�erential* 1/2” NPT Conduit Connection* NEMA 7/4X Switch Housing

Available Product Options* 1" to 2" Mounting Connection* NEMA 7 Gr. A&B Switch Housing* SPDT or DPDT Switch Circuit* Minimum Speci�c Gravity to 0.6* Operating Pressure to 600 PSIG* Operating Temperature 400°F* Float Size* 3/4” or 1” NPT Conduit Connection

Description:

The Type MT is a compact liquid level control designed for 1" or 2" NPT connection. The Models MT-1 and MT-2 are for internal service; the MT-2TA (see Special Construction) is for mounting outside the tank or vessel.

Features:

Body: The threaded body of the control is 316 SS.

Float: The MT-1 has a 1" x 6" 316 SS �oat. The MT-2 uses a 1-7/8" x 3-1/2" 316 SS �oat.

Trim: The trim, rod, associated hardware, and all the counterweight assembly is 316 SS.

Mounting: The mounting connection is 1" or 2" NPT, depending on the model selected. The control must be installed through a half-coupling. A full coupling interferes with the operation of the �oat mechanism.

Insertion Length: The distance from the face of the control to the end of the �oat is 7-1/2" for the MT-1 and 4-1/4" for the MT-2.

Di�erential: The di�erential is approximately 1/4" depending on the speci�c gravity. The di�erential is �xed, and cannot be adjusted. High level switching occurs when the liquid is at approximately the horizontal center of the control.

Switch Housing: Dual rated, NEMA 7/4X (explosion-proof Groups C & D, and water-tight, dust-tight, corrosive- resistant).

Conduit Connection: A 1/2" NPT connection is standard. 3/4" or 1" NPT connections are available.

Special Construction:

Flange Mounting: The controls can be supplied with �anges for mounting to a companion on the side of the tank or vessel. The minimum standard �ange sizes are 3" 150# ANSI �ange for the MT-1 and 3" 300# ANSI �ange for the MT-2.

Model MT-2TA: This model is an external unit supplied with an MT-2 mounted in the branch of a 2" malleable iron tee. Process connections are 2" NPT female, top and bottom. These connections can be reduced without a�ecting the operational characteristics of the control. Forged steel and cast steel are available on request and subject to factory quote. The construction features, and service conditions, are the same as the MT-2 described above.

13

External Liquid Level Control - Type R Standard Features* Cast Iron Float Chamber* 3/4" NPT Top/Bottom Process Connections* 1/2" NPT Conduit Connection* Fixed 3/4" Di�erential* 0.8 Minimum Speci�c Gravity

Available Product Options* NEMA 4 or 7 Switch Housing* SPDT or DPDT Switch Circuit* Brass Float Chamber* 1" NPT Process Connection* 1-1/4" Di�erential* 0.6 Minimum Speci�c Gravity* 30, 100 or 250 PSIG Models

Description:

The Type R is an externally mounted, single point liquid level control. The body style, with its top and bottom process connections, allow easy installation using straight-through piping. Models are available for service of 30, 150 or 250 PSIG with an operating temperature up to 500°F and speci�c gravity as low as 0.6.

Features:

Float Chamber: The �oat chamber is cast iron. A brass chamber is available for 30 and 150 psig models. Refer to the Type CB if other materials are required.

Float: A 2-1/2" round �oat is standard in copper or 316 SS, depending on the model selected.

Mounting and Process Connections: The control is mounted externally to the tank or vessel using 3/4" NPT female connections located on the top and bottom of the chamber. One inch NPT connections are available at added cost.

Mounting: The standard connection is 3/4" NPT, top and bottom.

Di�erential: The �xed di�erential is 3/4". The switch actuation point is not adjustable. At extra cost, a �xed 1-1/4" di�erential can be provided.

Switch Housing: A NEMA 4 (water-tight and dust-tight) or NEMA 7 (explosion-proof) housing is available.


Special Construction:Low Speci�c Gravity: A special �oat is available for applications with speci�c gravity of 0.6 to 0.79.

Other Features: 1-1/4" Di�erential 1" NPT Process Connections Minimum Speci�c Gravity of 0.6

14

External Liquid Level Control - Type S Standard Features* Carbon Steel Float Chamber* Stainless Steel Float and Trim* 1" Process Connections* All Welded Chamber for Models Rated 1000 PSIG & More* 1" Switch Di�erential* 3/4" NPT Conduit Connection

Available Product Options* NEMA 4X or 7/4X Switch Housing* Male, Socket Weld or Flange Process Connections* Stainless Steel Float Chambers* SPDT, DPST or DPDT Switch Circuit* Multiple Switches* Electronic, Solid State, or Pneumatic Switching Operation* Minimum Speci�c Gravity to 0.375* Cooling Fins for High Temperature Applications up to 1000°F* Interface Operations* Wide Di�erential* Breather and Drain for NEMA 7/4X Switch Housing* 1/2" NPT or M20 Conduit Connection

Description: The Type S is an external service, side mounted liquid level control. The S is used for applications having operating pressures of 1000 to 3000 PSIG. A special design of the Type S is used for interface service between liquids with speci�c gravity di�erences between 0.12 and 0.19. Models are available for service to 3000 PSIG; operating temperature to 1000°F, and speci�c gravity as low as 0.375. The many optional and special constructional features make the Type S practical for a wide range of applications.

Features:Float Chamber: The welded chamber is standard in carbon steel pipe. At extra cost, it can be supplied in 316 SS. Contact the factory for availability of, and quotation for, other materials.

Float: Float material is standard in 316 SS.

Trim: The trim, which includes the �oat rod with its related hardware and the enclosing tube assembly, is standard in 316 SS.

Process Connections and Mounting: The standard connections are 1" located on the side and bottom having an 11-1/2" centerline dimension. Male connections usually ease �eld installation by eliminating the need for an extra union. Other connections are available as follows: female, socket weld or �ange. Refer to the Dimensional Data for the standard centerline dimension of these connections. Specify in the RFQ if a di�erent centerline dimension is required. All connections can be supplied in sizes up to 2".


Switch Housing: A NEMA 4X (water-tight, dust-tight) or NEMA 7/4X (explosion-proof and NEMA 4X) housing is available.


15

Special Construction:

Wide Di�erential: For applications with a di�erential greater than provided by the standard model, the following options are available:


2) “GK” Assembly: For a di�erential from 5" minimum to 24", the "GK" assembly can be used. This arrangement consists of two (2) separate NEMA 7 C&D (explosion-proof) switch housings, each containing one electrical switch. The distance, on the enclosing tube, between the horizontal centers of the housings is the di�erential distance. The distance is factory set, and cannot be adjusted. In order to accommodate the extended head of this design, the room above the tank mounting location must exceed the di�erential by at least 8". Switches for the "GK" assembly require a special enclosing tube mounting clamp due to the limited room in the smaller explosion-proof housing. Part numbers have been assigned to re�ect the di�erence in clamps.

The "GK" assembly can also be used for applications with three or more level points. Minimum distance between levels is 5".

3) Tandem Floats: A factory set wide di�erential of 10" minimum to 36" maximum can be obtained by using a tandem �oat arrangement. This design uses two (2) �oats in an extended �oat chamber and two (2) switches in a standard switch housing. Each �oat has its own rod, piston and switch to actuate. The solid �oat rod of the lower �oat passes through the tube of the upper �oat. The lower �oat actuates the upper switch, and the upper �oat actuates the lower switch.


High Pressures: For �oat-type control applications with operating pressures of 1000 PSIG to 1500 PSIG and self-purging �oats not being suitable, see the Type S.

Note: Type CB level controls manufactured before March 1, 2000 might not match the current speci�cations. However, replacement controls can be built to retro-�t the existing, as long as a complete description is provided. The serial number and other nameplate data will aid in specifying replacement units.

Optional Features:Cooling Fins: For application with a process temperature above 400°F, up to 1000 °F (depending on the switch selected), cooling �ns are used to dissipate the heat which would otherwise be transmitted to the switches.


Interface: The controls are available for interface service. The di�erence in speci�c gravities between the two liquids must be 0.20 or more. The �oat for interface service is weighted in order to sink in the lighter liquid, but �oat in the heavier liquid. If the di�erence is between 0.12 and 0.19, a custom design is available.

External Displacer: For low level applications where the operating pressure is 1000 PSIG or more, an external displacer control can be used. The displacer di�ers from the �oat control because the operation is based on weight displacement rather than buoyancy. In the low level position, the weight of the displacer will expand the displacer spring and keep the actuating piston out of the magnetic operating zone of the switch. As the liquid rises, it begins to displace the weight of the displacer. The spring senses the weight change, and will compress. In doing so, the spring will lift the actuating piston into the magnetic operating zone of the switch. As the level descends, the switch will remain actuated until the weight of the displacer expands the spring, pulling the piston out of the operating zone. The maximum operating temperature is 1000°F with cooling �ns.

Other Optional Features: Process Connection - Male, Flange, or Socket Weld Process Connection Location Process Connection Size Wiring Terminal Block Pneumatic Switches 1/2" NPT or M20 Conduit Connection

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Liquid Level Control - Type WB

Standard Features* Used for Rainfall Detection* Switch actuates after 1/10" of rainfall* 14" Diameter Funnel with Debris Screen* NEMA 4 Switch Housing* 1/2" NPT Conduit Connection* Stainless Steel Float Chamber and Funnel

Available Product Options* Red/Green Light Indicators* 120VAC Solenoid Drain Valve* 316 SS Ball Drain Valve* Detection Range From 1/10" to 1" of rainfall

Description:

The Model WB is a special purpose level switch designed for use with sewer diversion and automated irrigation systems. The WB gives an electrical signal after a given amount of rain has fallen. This signal is used to divert storm water away from the normal water treatment facilities and into the storm sewer system, or to activate a sump pump.

The signal can also be used to omit an irrigation cycle for country clubs, agriculture �rms, or others that are a�ected by rain. Particularly valuable for large expanses of land where localized storms might cover one area, but not another. By use of rain switches in di�erent areas, the irrigation system will operate only in those areas where rainfall did not occur.

Unless otherwise speci�ed, the electrical signal will be given after 1/10" of rain falls. However, at extra cost, the WB can be speci�ed to activate at any point between 1/10" and 1" of rainfall. The switch point is �xed and cannot be changed in the �eld.

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Switch Packages

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Switch Package Cross Reference List Old Designation New Designation Switch Element Available Units Switch Type V (CAN) Type W (CASE) Type Y (Special) BA3WP L1-1-27 - - -1, -2, -3 BAC FGZA2WP L1-1-67 L1-2-67 - -5 CB,F,FL,KC,KT,S FGZA3WP L1-1-68 - - -5 CB,F,FL,KC,KT,S FGZD2WP L1-1-69 L1-2-69 - -5 CB,F,FL,KC,KT,S FGZD3WP L1-1-70 - - -5 CB,F,FL,KC,KT,S FZA2WP L1-1-71 L1-2-71 - -1,-2,-3 CB,F,FL,KC,KT,S FZA3WP L1-1-72 - - -4 CB,F,FL,KC,KT,S FZD2WP L1-1-73 L1-2-73 - -1,-2,-3 CB,F,FL,KC,KT,S FZD3WP L1-1-74 - - -4 CB,F,FL,KC,KT,S GZA2WP L1-1-65 L1-2-65 - -5 CB,F,FL,KC,KT,S GZA3WP L1-1-63 - - -5 CB,F,FL,KC,KT,S GZD2WP L1-1-66 L1-2-66 - -5 CB,F,FL,KC,KT,S GZD3WP L1-1-64 - - -5 CB,F,FL,KC,KT,S LA1MP L1-1-60 - - -1,-2,-3 CB,F,FL,KC,KT,S LA9MP L1-1-75 - - -1,-2,-3 CB,F,FL,KC,KT,S LD1MP L1-1-76 - - -1,-2,-3 CB,F,FL,KC,KT,S RS3P L1-1-28 - - -1,-2,-3 WB ZA2P L1-1-23 L1-2-23 - -1,-2,-3 A,AF,ASF,R ZA2WP L1-1-25 L1-2-25 - -1,-2,-3 CB,F,FL,KC,KT,S ZA3P L1-1-21 - - -4 A,AF,ASF,R ZA3WM/T - - L1-3-1 -6 CB,F,FL,KC,KT,S ZA3WP L1-1-22 - - -4 CB,F,FL,KC,KT,S ZA4W - - L1-3-2 -7 CB,F,FL,KC,KT,S ZD01WP L1-1-77 L1-2-77 - -1,-2,-3 CB,F,FL,KC,KT,S ZD2P L1-1-24 L1-2-24 - -1,-2,-3 A,AF,ASF,R ZD2WP L1-1-79 L1-2-79 - -1,-2,-3 CB,F,FL,KC,KT,S ZD3P L1-1-61 - - -4 A,AF,ASF,R ZD3WP L1-1-62 - - -4 CB,F,FL,KC,KT,S ZDC2WP L1-1-78 L1-2-78 - -1,-2,-3 CB,F,FL,KC,KT,S Pneumatic Switches GR4 BLOCK AND BLEED VENT TO ATMOSPHERE GR5 NO/NC VENT TO ATMOSPHERE GR6 NO/NC VENT TO CLOSED SYSTEM

Type W

Type V

Jo-Bell switches feature tough, precision, snap-action dry contacts contained within a compact, non-ferrous canister. The switch mechanism is hermetically sealed and subsequently, is not a�ected by atmospheric elements. Heaters are not needed even in cryogenic applications. Jo-Bell switches are compact, rugged, self-contained and designed to withstand vibration

-1 (Default unless otherwise speci�ed) Operating Temp: -40 to 180 Deg F Contacts: Silver Approvals: UL/CSA Electrical: 10A @ 277VAC; 10A @ 125VAC; 2A @ 24VDC

-2Operating Temp: -40 to 180 Deg F Contacts: Silver Approvals: UL/CSA Electrical: 11A @ 277VAC; 11A @ 125VAC; 2.5A @ 24VDC

-3Operating Temp: -13 to 257 Deg F Contacts: Silver Cadmium OxideApprovals: UL/ENEC/COC/cULElectrical: 15A @ 250VAC; 15A @ 125VAC; 3.5A @ 24VDC

-4Operating Temp: -40 to 392 Deg F Contacts: Silver Approvals: UL/CSA Electrical: 6A @ 250VAC; 6A @ 125VAC; 1.5A @ 24VDC

-5Operating Temp: -40 to 350 Deg F Contacts: Gold Approvals: UL/CSA Electrical: 0.1A @ 125VAC; 0.1A @ 24VAC;

-6Operating Temp: -85 to 500 Deg F Contacts: Silver Approvals: Electrical: 1A INDUCTIVE LOAD, 3A RESISTIVE LOAD @ 28VDC

-7Operating Temp: -40 to 180 Deg F Contacts: Silver Approvals: UL/CSA Electrical: 10A @ 277VAC; 10A @ 125VAC;




The ZA-4W is a Single Pole, Double Throw,Normally Open / Normally Closed switch with amaximum operating temperature of 800°F.

Electrical Ratings:3 Amps, 1/10 H.P. @ 125 VAC2 Amps, 1/5 H.P. @ 250 VDC

ZA4W

Pneumatic

There is a limit of one (1) pneumatic switch per control. The switch can be set to vent on either high level or low level. The air ports are marked “A, B or C”. Air connections can be made as described below:

PORT VENT ON HIGH LEVEL VENT ON LOW LEVEL A VENT IN B IN VENT C OUT OUT

Switch Specifcations:

Temperature range: -20 to 250°F Supply pressure: 2 to 150 psi Cv: Approx. 0.4 Ori�ce equivalent: 9/16 diam. Flow rate (Max.): 4 scfm @ 100 psi

ZA3WM/T

The ZA3WM/T is a Single Pole, DoubleThrow, Normally Open / NormallyClosed switch with a maximumoperating temperature of 500°F.

Electrical Ratings:3 Amps @ 28 VDC1 Amps @ 115 (400 cycle)

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Jo-Bell ProductsDivision of Dalnor Systems, Inc.

5325 Sierra Vista DriveCarlsbad NM, 88220

Phone: 575-628-0675Fax: 575-628-0679

http://www.jobellproducts.com

Documents

Jo-Bell Products Products has been producing liquid level controls since 1947, and was orginally located in Oak Lawn, Illinois. It has an installed base of hundreds of thousands of