1
Regulators
The LP Gas regulator is called upon to deliver a very precise operating pressure to a load which can vary from pilot flow to wide open flow and at the same time compensate for extreme changes in tank supply pressure. In a properly sized propane system, this is accomplished consistently and automatically without user intervention or in most cases without user knowledge of the dynamics.
Amazing Indeed!
The LP Gas Regulator - Workhorse of the Industry
Some Examples of Regulator Systems
Single Stage Systems
Twin Stage Systems
Two Stage Systems
Pounds to Pounds SystemsSingle stage regulators may only be used on portable appliances and outdoor cooking appliances. No fixed piping systems.
Twin stage regulators incorporate the 1st stage and 2nd stage in one compact body. They are used for smaller systems with relatively short piping runs.
Two stage regulators are used where the storage is remote from the load. Two stage offers superior, uniform pressure control.
Pounds to pounds regulators are used exten-sively on industrial burners such as torches, tar kettles and crop dryers.
Line Pressure11” W.C. Regulator
Second Stage2 PSIRegulator
First Stage10 PSIRegulator
Twin Stage11” W.C.Regulator
Single Stage11” W.C.Regulator
2 PSIG Systems2 PSIG systems use three regulator stages which allows smaller, more compact piping in the building.
2
302V9LS
Regulators
LV404B34V9
LV404B39V9and
LV404Y9
LV3403TR LV4403TR9
* Propane capacity based on 25 PSIG inlet pressure and 9” W.C. delivery pressure.
* Propane capacity based on inlet pressure 20 PSIG higher than the set pressure anddelivery pressure 20% lower than the setting.
LV2302A2
These compact regulators are designed for small domestic applications.Models available with 11” W.C. or 2 PSIG discharge pressures.
These regulators are used for first stage regulation in two-stage bulk tank systems.They reduce container pressure to an intermediate pressure of 5 to 10 PSIG.
* Propane capacity based on 25 PSIG inlet pressure and 9” W.C. delivery pressure.** Propane capacity based on 25 PSIG inlet pressure and 1.5 PSIG delivery pressure.
These compact regulators are designed for smaller outdoor applications.Single stage regulators may not be installed in fixed piping systems per NFPA 58.
PartNumber
BTU/HR*Capacity
InletConnection
OutletConnection
OutletPressure
302V 125,000 1/4” FNPT
3/8” FNPT 11” W.C.302V9LS 125,000 MPOL
LV2302A2150,000
1/4” FNPT
LV2302P MPOL
Single Stage Regulators
Twin Stage Regulators
PartNumber
BTU/HR*Capacity
InletConnection
OutletConnection
OutletPressure
LV404B34V9 450,000* 1/4” FNPT1/2” FNPT
11” W.C.LV404B39V9 450,000* FPOL
LV404B46 525,000* 1/4” FNPT 3/4” FNPT
LV404B9V9 525,000* 1/4” FNPT 1/2” FNPT
LV404Y9 800,000** FPOL 1/2” FNPT 2 PSIG
Domestic First Stage Regulators
PartNumber
BTU/HR*Capacity
InletConnection
OutletConnection
OutletPressure
LV3403TR 1,500,000 1/4” FNPT
1/2” FNPT
10 PSIG
LV4403SR4
2,500,000
1/2” FNPT5 PSIG
LV4403TR4 10 PSIG
LV4403SR9FPOL
5 PSIG
LV4403TR9 10 PSIG
3
The capacity of any given regulator drops drastically at reduced inlet pressures. The standard capacities listed on page 2 are only intended as a comparative guide and should not be used for final regulator selection. Use the following flow charts with particular attention to the lowest expected temperature and associated tank pressure.
LV404B9V9 Twin Stage Regulator
LV4403TR9 First Stage Regulator
1584M, X1584M Regulator
LV3403TR First Stage Regulator
Vapor Pressure Of Propane
TemperatureOF
PressurePSIG
-40-30-20-100102030405060708090100110120
1.35.510.716.723.531.340.851.663.377.192.5109.3128.1149.3172.3197.3225.0
Regulators
EXAMPLE:The standard capacity for the LV4403TR9 regulator is listed at 2,500,000 BTU/HR. At around -12 OF, the tank pressure falls to approximately 15 PSIG.
Under these conditions, the LV4403TR9 capacity chart shows the delivery pressure dropping to approximately 8 PSIG with a flow of only 1,250,000. This capacity is 1/2 the standard capacity.
Note: Under heavy load conditions, the temperature of the gas in the storage tank will be considerably less than the ambient air temperature as the liquid boils to keep up with the demand. This reduces the available tank pressure even futher.
LOW TEMP =LOW TANK PRESSURE =LOW REGULATOR INLET PRESSURE
CFH/hrBTU/hr
100250,000
5001,250,000
DE
LIV
ER
Y P
RE
SSU
RE
PSIG
9
10
11
12
200500,000
300750,000
4001,000,000
6001,500,000
7001,750,000
INITIAL SETTING
150 PSIG INLET
100 PSIG INLET
50 PSIG INLET
25 PSIG INLET
FLOW PROPANE
DE
LIV
ER
Y P
RE
SSU
RE
PSIG
DE
LIV
ER
Y P
RE
SSU
RE
PSIG
CFH/hrBTU/hr
CFH/hrBTU/hr
100 200500,000
5001,250,000
300
1000
4001,000,000
15003,750,000
500
2000
6001,500,000
700 8002,000,000
25006,250,000
900
3000
10002,500,000
35007,750,000
FLOW PROPANE
FLOW PROPANE
150 PSI INLET125 PSI INLET100 PSI INLET
INITIAL SETTING
50 PSI INLET25 PSI INLET15 PSI INLET
7
2
8
6
910
10
1112
14
CFH/hrBTU/hr
3075,000
60
FLOW PROPANE
90225,000
120 150375,000
180 210525,000
240 270675,000
DE
LIV
ER
Y P
RE
SSU
RE
Inch
es o
f Wat
er C
olum
n
910111213 INITIAL SETTING
100 PSI INLET
150 PSI INLET
10 PSI INLET25 PSI INLET 75 PSI INLET
Regulator Capacity Charts - Twin Stage & First Stage
INITIAL SETTING
25 PSIG INLET
50 PSIG INLET100 PSIG INLET150 PSIG INLET
10 PSIG INLET
4
LV4403B4
LV3403B4
LV5503B4
* Propane capacity based on 10 PSIG inlet pressure and 9” W.C. delivery pressure.** Vent located above outlet.*** Back Mount design.**** Right Angle design
Designed to reduce first stage pressure of 5 to 20 PSIG down to burner pressure, normally 11” W.C.
LV4403B66RA
* Propane capacity based on 10 PSIG inlet and 10% droop.** Back Mount design.
LV4403Y4
243-8 2”
Designed to reduce first stage pressure of 10 PSIG down to 2 PSIG.A line pressure regulator is required downstream to reduce 2 PSIG to 11” W.C.
LV4403B46R
143-80HP
Regulators
Domestic Low Pressure Second Stage Regulators
PartNumber
BTU/HR*Capacity
InletConnection
OutletConnection
OutletPressure
LV3403B4 450,000
1/2” FNPT
1/2” FNPT
11” W.C.
LV4403B4
935,000
LV4403B4VO**
LV4403B46
3/4” FNPT
LV4403B46R***
LV4403B66
3/4 FNPTLV4403B66R***
LV4403B66RA**** 1,000,000
LV5503B41,600,000
1/2” FNPT
LV5503B63/4” FNPT
LV5503B8 2,300,000 1” FNPT
PartNumber
BTU/HR*Capacity
InletConnection
OutletConnection
OutletPressure
LV4403Y4 750,000 1/2” FNPT 1/2” FNPT
2 PSIG
LV4403Y46R** 750,000 1/2” FNPT 3/4” FNPT
LV5503Y6 1,210,000 3/4”FNPT 3/4”FNPT
LV5503Y8 1,210,000 3/4” FNPT 1” FNPT
143-80HP 1-1/4” 2,373,840 1-1/4” 1-1/4”
243-8 1-1/4” 3,165,120 1-1/4” 1-1/4”
243-8 1-1/2” 6,330,240 1-1/2” 1-1/2”
243-8 2” 6,330,000 2” 2”
243-12 1-1/2” 9,495,360 1-1/2” 1-1/2”
243-12 2” 11,077,920 2” 2”
121-8 2” 61,719,840 2” 2”
121-12 2” 77,545,440 2” 2”
2 PSIG Second Stage Regulators
5
Regulators
Line Pressure Regulators For 2 PSIG Systems
325-3
* Propane capacity based on 1 PSIG pressure drop across regulator.** Largest single appliance size for reasonable lockup and delivery pressure.
Designed to reduce 10 PSIG line pressure down to 11” W.C.Other spring ranges available for special applications.
Industrial Second Stage Regulators
* Propane capacity based on 10 PSIG inlet pressure and 11” W.C. delivery pressure.
243-12
143-80
243-8
121-12
PartNumber
BTU / HR*Capacity
InletConnection
OutletConnection
OutletPressure
143-80 3/4” 1,614,211 3/4” FNPT 3/4” FNPT
6 -14” W.C.
143-80 1” 1,899,072 1” FNPT 1” FNPT
143-80 1-1/4” 2,848,608 1-1/4” FNPT 1-1/4” FNPT
243-8 1-1/4” 4,589,424 1-1/4” FNPT 1-1/4” FNPT
243-8 1-1/2” 11,077,920 1-1/2” FNPT 1-1/2” FNPT
243-8 2” 11,077,920 2” FNPT 2” FNPT
243-12 1-1/2” 12,976,922 1-1/2” FNPT 1-1/2” FNPT
243-12 2” 20,573,280 2” FNPT 2” FNPT
121-12 2” 80,710,560 2” FNPT 2” FNPT
Designed to reduce 2 PSIG line pressure down to 11” W.C.1/2” & 3/4” sizes include a vent limiting device which allows them to be used indoors.1-1/4” size cannot be fitted with vent limiter.Regulator must be mounted in the horizontal position when using the vent limiting device.
PartNumber
BTU / HR*Overall Capacity
BTU / HR**Per Appliance
InletConnection
OutletConnection
OutletPressure
325-3 395,640 221,558 1/2” FNPT 1/2” FNPT 11” W.C.
325-5 870,408 474,760 3/4” FNPT 3/4” FNPT 11” W.C.
325-7 1,582,560 1,424,304 1-1/4” FNPT 1-1/4” FNPT 11” W.C.
6
X1580 Series** Propane capacity based on inlet pressure 20 PSIG higher and delivery pressure 20% lower than set pressure.
High Temp/High Pressure Pounds To Pounds RegulatorsX1580 series regulators have special construction for high temp LP Gas service such as crop drying, heat treating or asphalt mixing. Designed to reduce tank pressure down to between 3 and 125 PSIG. Ideal for a variety of pounds to pounds applications.
597 Series
High Pressure Pounds To Pounds Regulators
PartNumber
BTU / HR**Capacity
In & OutConnection
OutletPressure
597FA 500,000
1/4” FNPT
3 - 15 PSIG
597FB 820,000 10 - 25 PSIG
597FC 1,000,000 20 - 45 PSIG
597FD 1,250,000 40 - 100 PSIG
Designed to reduce tank pressure down to between 3 and 100 PSIG. Ideal for a variety of pounds to pounds applications.The 597 series is suitable for liquid or vapor service.
** Propane capacity based on inlet pressure 20 PSIG higher and delivery pressure 20% lower than set pressure.
A Word About High Pressure Regulators
Downstream Overpressure ProtectionUnlike their Domestic First Stage cousins, the High Pressure Pounds to Pounds regulators do not offer built-in overpressure protection for downstream equipment. These regulators normally operate with high inlet pressures and have relatively large orifice sizes. These regulators do not have built-in full capacity relief devices.
When installing High Pressure Pounds to Pounds regulators, care must be taken to protect downstream equip-ment from damage should the High Pressure regulator fail. If for instance a regulator seat should fail, uncon-trolled inlet pressure will be allowed into the downstream piping. An external pressure relief valve installed downstream from these regulators is often required for adequate system protection.
See Vapor Relief Valve Section
Regulators
PartNumber
BTU / HR**Capacity
In & OutConnection
OutletPressure
X1584MN 7,000,0001/2” NPT
3 - 30 PSIG
X1584ML 7,500,000 25 - 50 PSIG
X1586MN 11,000,0003/4” NPT
3 - 30 PSIG
X1586ML 12,000,000 25 - 50 PSIG
X1588MN 11,000,000 1” NPT 3 - 30 PSIG
7
Industrial First Stage Regulators
99-504
627/7710
630-78
Regulators
1580 Series
* Propane capacity. Rated capacites vary greatly with differing inlet pressures. The 15 PSIG values are offered for selection of the proper regulator in cold weather, reduced tank pressure situations.
PartNumber
BTU / HR*Capacity15 PSI In
BTU / HR*Capacity50 PSI In
In & OutConnection
OutletPressure
1584MN 3,500,000 7,000,000
1/2” FNPT
3 - 30 PSIG
1584ML ---- 7,500,000 25 - 50 PSIG
1584MH ---- 8,000,000 45 - 125 PSI
1586MN 7,500,000 11,000,000
3/4” FNPT
3 - 30 PSIG
1586ML ---- 12,000,000 25 - 50 PSIG
1586MH ---- 14,000,000 45 - 125 PSIG
1588MN 7,500,000 11,000,000
1” FNPT
3 - 30 PSIG
1588ML ---- 12,000,000 25 - 50 PSIG
1588MH ---- 14,000,000 45 - 125 PSIG
627/7710 5,222,448 17,560,086 1” FNPT 10 - 20 PSIG
630-78 9,495,360 25,320,960 2” FNPT 8 - 20 PSIG
99-513 7/8” or. 12,343,968 53,807,040 2” FNPT 5 - 15 PSIG
99-504 1-1/8” or. 20,573,280 90,205,920 2” FNPT 5-15 PSIG
Designed to reduce tank pressure down to between 5 and 20 PSIG. These regulators are used for the first cut from tank or vaporizer in multi million BTU applications. Other spring ranges and flow capacities available to meet specific needs.
These regulators do not provide overpressure protection for the downstream equipment. An external pressure relief valve installed downstream from these regulators is often required for adequate system protection.
See Vapor Relief Valves Section
8
Specialty RV Regulators
PartNumber
BTU / HR*Capacity
InletConnection
OutletConnection
OutletPressure
299-00 160,000 1/4” FNPT 3/8” FNPT 11” W.C.
254-00 130,000 1/4” Inv Flare 3/8” FNPT 11” W.C.
* Propane capacity based on 25 PSIG inlet pressure and 9” W.C. delivery pressure.
299-00 254-00
Regulators
Automatic Changeover Regulators
* Includes pigtails and mounting bracket.** Propane capacity based on 25 PSIG inlet pressure and 9” W.C. delivery pressure.
7525B34 7525B4
PartNumber
BTU / HR**
Capacity
InletConnection
OutletConnection
ServiceIndicator
OutletPressure
7525B34 400,0001/4” Inverted
Flare 1/2” FNPT Integral 11” W.C.7525B4500,000
5755B4*
Designed to provide overpressure protection after high pressure regulators per requirements of NFPA 58.Proper selection of the relief device requires that the failure flow rate of the high pressure regulator be known.Other spring ranges and flow capacities available to meet specific needs.
Typical external relief installation
Vapor Relief Valves
PartNumber
SpringRange Size CFH Flow Propane
at 20 PSIGPipeawayAdapter
3139-18 18 PSIG (fixed) 1/4” MNPT 1357 3139-10 3/8” FNPT
289H-43 10 - 20 PSIG 1” FNPT 20,096 Use 1” pipe
3139-18
289H
Smaller, compact twin-stage and automatic changeover regulators mainly for RV applications.
Designed for two cylinder applications. Provides automatic changeover from “service” to “reserve” cylinder.
3139-10
9
Pigtails/Hogtails
Regulator Accessories
ConnectionsApproximate
Length
Part Number
1/4” Tube 3/8” Tube
7/8” HexShort Nipple
1 1/8” HexLong Nipple
7/8” HexShort Nipple
MPOL XMPOL
5” ---- ---- 913PS05
12” 912PS12 ---- 913PS12
20” 912PS20 912PA20 913PS20
30” 912PS30 ---- 913PS30
36” 912PS36 912PA36 913PS36
48” 912PS48 912PA48 913PS48
1/4” InvertedFlare
X MPOL
20” 912FS20 912FA20 ----
30” 912FS30 ---- ----
36” 912FS36 ---- ----
1/4” MNPTX MPOL
5” ---- ---- 913JS05
12” 912JS12 ---- 913JS12
20” 912JS20 ---- 913JS20
36” 912JS36 ---- ----
1/2” MNPTX MPOL 12” ---- ---- 913LS12
Regulator Brackets
2503-222302-31
2503-19
913PS12
912JS12
912FS20
912 Pigtails are 1/4” O.D. copper
913 Hogtails are 3/8” O.D. copper
Copper pigtails with brass connectors provide an effective method of connecting regulators to storage tank outlet valves.
Specially designed to mount RegO regulators where a bracket is required.
PartNumber Material For Use With Regulator
2302-31 Cadmium PlatedSteel
2302 Series / LV404B34 / LV3403B4 / LV3403TR
2503-22 LV404B9 Series, LV5503 SeriesLV4403 Series2503-19 Aluminum
10
Regulator Accessories
Regulator Vent Piping DO NOT USE THE RUBBER SUPPRESSOR FOR VENTS OVER 1/4”The vent line must be as large as the vent opening on the regulator.
The termination must be protected from the elements and insects.
For Indoor VentingUse the appropriate size standard pipe and terminate the run outdoors with a vent screen. Do not use PVC indoors.
For Outdoor VentingUse either the appropriate size pipe or the equivalent sizeUL651 SCH 40 Rigid PVC Conduit and terminate the run with a vent screen.
UL 651 SCH 40 Rigid PVC ConduitPipe and fittings are nonmetallic PVC. They are resistant to sunlight andare UL Listed for exposed or outdoor usage. Lightweight and easy cementjoint installation.
OutdoorsUse Steel Pipe or UL 651 PVC
IndoorsUse Steel Pipe and Fittings
Regulator vent discharge must be remote frombuilding openings, air intakes & ignition sources.
Regulators installed inside buildingsmust be vented to the outdoors.
Refer to NFPA 58 for Point of Discharge requirements.
4403-30Screen
Y602-9Screen
TERMINATE WITH A VENT SCREEN
3/4” NPT
Screen
Screen
Sample Electrical PVC Conduit
and Fittings (UL 651)
Purchase Locally
Remote Regulator Venting Examples
11
Multiple Cylinder Manifolds
PartNumber
InletConnections
OutletConnection
DiscCheck
1350EFPOL MPOL
No
1350R Yes
1450E 1/4” InvertedFlare 1/4” MNPT
No
1450R Yes1350E1450R
Pressure Test Equipment
Low Pressure Test Kit
2434A
High Pressure Gauge Adapter
2962
Low Pressure Manometer Kit
1212 KIT
Regulator Accessories
Leak Testing Made Simple♦ Permanantly installed access valve with automatic shutoff and dust cap eliminates breaking into the system.♦ Flexible hose with 90 degree knurled swivel adapter provides hand tight hookup even in tight quarters.♦ 15 PSI pressure gauge for accurate pressure test.♦ Bleed valve to reduce system pressure before testing.
APTK TEST KIT
ACCESSVALVE
190621/8” NPT
190631/4” NPT
Use with suitable pigtails to connect multiple cylinders together. Ideal for loads that require more than one cylinder to be in service at a time.
Access valves include caps with resilient seat for gas tight seal.
First Stage Regulatorwith Access Valve
For checking low pressure systems.Gauge has dual 35” w.c. & 20 oz. scales. Includes 3 ft. flexible hose with belled end
For checking high pressure sys-tems. MPOL X FPOL with 300# pressure gauge and bleeder.
For checking low pressure systems. 16” w.c. magnetic flex manometer, 3 ft. hose, green dye & tubing adapters.