Safety valve with unit approval type CMVX

Product documentation

D 7710 TÜV11-2016-1.0

Directly controlled

Operating pressure pmax: 500 barFlow rate Qmax: 28 lpm

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© by HAWE Hydraulik SE.The forwarding and reproduction of this document, as well as the use and communication of its contents, are forbidden unless expresse-ly permitted.Any breach or infringement will result in liability for damages.All rights reserved concerning patent or utility model application.

© HAWE Hydraulik SE D 7710 TÜV - CMVX - 11-2016-1.0 3/10

Contents

1 Overview of safety valve with unit approval type CMVX........................................................................................ 4

2 Available versions, main data............................................................................................................................. 5

3 Parameters......................................................................................................................................................... 6

4 Dimensions........................................................................................................................................................ 7

5 Assembly, operation and maintenance recommendations.......................................................................................85.1 Intended application............................................................................................................................................ 85.2 Assembly information........................................................................................................................................... 85.2.1 Manifold block.....................................................................................................................................................95.2.2 Screwing in the screw-in valve.............................................................................................................................. 95.2.3 Creating the mounting hole...................................................................................................................................95.3 Operating instructions.........................................................................................................................................105.4 Maintenance information..................................................................................................................................... 10

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1 Overview of safety valve with unit approval type CMVX

The safety valve with unit approval type CMVX 2 protects pressurised hydraulicsystems against overloading in accordance with the Pressure EquipmentDirective.The valves are designed as direct-acting, spring-loaded, cone-seated valves.

Features and benets:■ Operating pressures up to 450 bar■ Easily produced mounting hole

Intended applications:

Safety valve for accumulators in oil-hydraulic systems, taking account of thefollowing regulations:

■ Pressure Equipment Directive 2014/68/EU■ Industrial Safety Regulation dated 1 June 2015 / Use of Work Equipment

Directive 2009/104/EG■ AD 2000 Code, data sheet A2, latest release

Safety valve with unit approval type CMVX

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2 Available versions, main data

Circuit symbol:

Component coding:

CMVX 2 C - 300

Pressure range and pressure setting Table 2 Pressure range

Type and size Table 1 Type and size

Table 1 Type and size

Type and size Description Pressure settingpmax (bar)

Flow rateQmax (lpm)

CMVX 2 Screw-in valve 500 28

NoteThe max. ow rate and the permissible pressure setting depend on the selected pressure range according to Table 2.

Table 2 Pressure range

Type and size Pressure range Pressure setting rangepmin – pmax (bar)

Flow rateQmax (lpm)

Component coding Nom. # ofcone and seat (mm)

G 20 to 40 15 TÜV.SV.14 - 983.4.F.15. ...

F 41 to 65 18 TÜV.SV.14 - 983.4.F.18. ...

F 66 to 90 23 TÜV.SV.14 - 983.4.F.23. ...

E 91 to 110 20 TÜV.SV.14 - 983.4.F.20. ...

E 111 to 130 22 TÜV.SV.14 - 983.4.F.22. ...

E 131 to 170 28 TÜV.SV.14 - 983.4.F.28. ...

C 171 to 200 16 TÜV.SV.14 - 983.4.F.16. ...

C 201 to 260 20 TÜV.SV.14 - 983.4.F.20. ...

C 261 to 350 28 TÜV.SV.14 - 983.4.F.28. ...

B 351 to 395 12 TÜV.SV.14 - 983.4.F.12. ...

B 396 to 430 16 TÜV.SV.14 - 983.4.F.16. ...

CMVX 2

B 431 to 500 20 TÜV.SV.14 - 983.4.F.20. ...

4

NoteThe maximum operating pressure of the system should be at least 25% lower than the pressure setting on the safety valve.

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3 Parameters

General information

Designation Direct-acting pressure-limiting valve

Design Cone-seated design

Model Screw-in valve

Material Steel; nitrided valve housing, electrogalvanised sealing nuts and connection block, hardenedand ground functional inner parts

Attachment Screwed into self-manufactured manifold body and locked. See Chapter 5.2.2, "Screwing inthe screw-in valve"

Tightening torque See Chapter 4, "Dimensions"

Installation position As desired

Flow direction P d R

Ports P = pressure-side connectionR = reux (depressurised)

Hydraulic uid Hydraulic oil: according to DIN 51524-1 Part 1 to 3;according to DIN ISO 3448Also suitable for biologically degradable hydraulic uids type HEPG (polyalkylene glycol)and HEES (synthetic ester) at operating temperatures up to approx. +70°C.

Operating viscosity 12 to 230 mm2/s

Cleanliness level ISO 4406

21/18/15...19/17/13

Temperatures Environment: approx. -40 to +80°C, oil: -20 to +80°C, pay attention to the viscosity range.Biologically degradable pressure uids: Note manufacturer specifications. With considerationfor the seal compatibility, not above +70°C.

Static overload capacity 2 x pmax

Weight

Type

CMVX 2 = 160 g

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4 Dimensions

All dimensions in mm, subject to change.

1 O-ring 17.17x1.78 AU 90 Sh2 KANTSEAL DKAR00016-N90 DRV 100138-NB 6503 Sealing edge4 Sealing nut5 Valve housing

Mounting hole

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5 Assembly, operation and maintenance recommendations

5.1 Intended application

This valve is intended exclusively for hydraulic applications (uid engineering). The valve meets high technical safety standards andregulations for uid.

The user must observe the safety measures and warnings in this documentation.

Essential requirements for the product to function correctly and safely:

– All information in this documentation must be observed. This applies in particular to all safety measures and warnings.– The product must only be assembled and put into operation by qualied personnel.– The product must only be operated within the specied technical parameters. The technical parameters are described in detail in this

documentation.– The operating and maintenance manual of the specic complete system must also always be observed.

If the product can no longer be operated safely:

Remove the product from operation and mark it accordingly. It is then not permitted to continue using or operating the product.

5.2 Assembly information

The product must only be installed in the complete system with standard connection components that comply with market requirements(screw ttings, hoses, pipes, etc.).

The hydraulic system must be shut down correctly prior to dismounting; this applies in particular to hydraulic systems with hydraulicaccumulators.

DangerRisk to life caused by sudden movement of the hydraulic drives when dismantled incorrectly!Risk of serious injury or death.

■ Depressurise the hydraulic system.■ Perform safety measures in preparation for maintenance.

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5.2.1 Manifold block

When designing the manifold block, the ow direction (see Chapter 2, "Available versions, main data") must be heeded. The limit valuesfor pressure and ow rate in the table according to Chapter 2, "Available versions, main data" apply for the depressurised reux to thetank. When designing the manifold block into which the CMVX 2 is to be screwed, the ow resistance of the return duct (R) is thereforeto be kept as low as possible as it counts towards the valve pressure. It should therefore be ensured that the R duct is sufficientlydimensioned and, as far as possible, channelled back to the oil tank of the system directly and without numerous detours. In the lowestpmin range of 20 and 91 bar for each of the valves CMVX 2 G and E, and with full utilisation of the Qpermitted values, it is recommendedthat you do not connect the R duct to the general reux of the hydraulic circuit if higher reux resistances are to be expected there.Instead it should be guided back separately and not under pressure.

5.2.2 Screwing in the screw-in valve

Particular care must be taken when installing the valves. The provisions of the Pressure Equipment Directive must be observed. Regularinspections are governed by the national regulations on safety valves and systems. In order to protect it against external damage, thevalve must be installed in a safe position or a suitable protective device must be tted.

1 Stopper

2 Locking

3 Sealing edge

4 Basic body

5 Lock nuts and sealing nuts

6 Valve

1. Before screwing in the valve, loosen the lock nut and sealing nut until the travel stop.2. Screw in the valve and tighten to the specied torque. The metallic sealing of the inlet

to the outlet is formed between the facial sealing edge of the valve and the shoulder ofthe stepped hole in the basic body.

3. Tighten the counter/sealing nut to the specied torque.

5.2.3 Creating the mounting hole

See description in Chapter 4, "Dimensions".

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5.3 Operating instructions

Product configuration and setting the pressure and ow rate

The statements and technical parameters in this documentation must be strictly observed.The instructions for the complete technical system must also always be followed.

Note■ Read the documentation carefully before usage.■ The documentation must be accessible to the operating and maintenance staff at all times.■ Keep documentation up to date after every addition or update.

CautionRisk of injury on overloading components due to incorrect pressure settings!Risk of minor injury.

■ Always monitor the pressure gauge when setting and changing the pressure.

Purity and ltering of the hydraulic uid

Fine contamination can significantly impair the function of a hydraulic power pack. Contamination can cause irreparable damage.

Examples of ne contamination include:– Metal chips– Rubber particles from hoses and seals– Dirt due to assembly and maintenance– Mechanical debris– Chemical ageing of the hydraulic uid

NoteFresh hydraulic uid from the drum does not always have the highest degree of purity. Under some circumstances the freshhydraulic uid must be ltered before use.

Pay attention to the cleanliness level of the hydraulic uid in order to maintain faultless operation.(Also see cleanliness level in Chapter 3, "Parameters".)

5.4 Maintenance information

This product is largely maintenance-free.

Conduct a visual inspection at regular intervals, but at least once per year, to check if the hydraulic connections are damaged. Ifexternal leakages are found, shut down and repair the system.

Clean the device surface of dust deposits and dirt at regular intervals, but at least once per year.

D 77

10 T

ÜV

- CM

VX -

11-

2016

-1.0

HAWE Hydraulik SEStreitfeldstraße 25 | 81673 München | Postfach 80 08 04 | 81608 München | GermanyTel +49 89 379100-1000 | Fax +49 89 379100-91000 | info@hawe.de | www.hawe.com

Further information

Additional versions■ Connection block type AX, with unit approval: D 6905 TUV■ Pressure-limiting valve, with unit approval type MV .X: D 7000 TUV■ Pressure-limiting valve type MV, SV and DMV: D 7000/1■ Pressure-limiting valve (installation kit) type MV: D 7000 E/1■ Pressure valve type CMV, CMVZ, CSV and CSVZ: D 7710 MV■ Pressure-limiting valve, pilot-controlled type DV, DVE and DF: D 4350