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Proportional- pressure relief valves

Proportional pressure relief valve Screw-in cartridge

  • Pilot operated

m33x2

• Qmax

= 230 l/min

• pmax

= 400 bar

• pN max

= 350 bar

ISO 7789

deSCrIPTION Pilot operated, proportional pressure relief val- ve, as screw-in cartridge with a thread M33x2 for cavity according to ISO 7789. 4 standard pressure levels are available: 100 bar, 200 bar, 275 bar and 350 bar. The adjustment takes place by means of a Wandfluh proportional solenoid (VDE-standard 0580). The cartridge body made of steel is zinc coated and there- fore rust-protected. The solenoid coil is zinc-/ nickel-coated.

FUNCTION When the operating pressure set by the pro- portional solenoid is reached, the main spool opens and connects the protected line with the return line to the tank. The back pressure in T influences the pressure in P (1). This pilot operated proportional pressure relief valve can be adjusted very sensitively and is suitable for large volume flows and high pressures. To control the valve, Wandfluh proportional ampli- fiers are available (see register 1.13).

aPPlICaTION The valve has its application in hydraulic sy- stems, in which the pressure frequently has to be changed. The facility for electric remote controlling of the valve in conjunction with process control systems enables economic problem solutions with repeatable sequences. Installation of the screw-in cartridge in control blocks.Cavity tools are available for machi- ning cavities in steel and aluminium (hire or purchase). Please refer to the data sheets in register 2.13.

Nominal voltage UN

12 VDC 24 VDC

G12 G24

without coil

X5

B V P PM33 -

  • -

    /

  • -

    #

TyPe COde

Slip-on coil

Connection execution

  • Only available in conjunction with other nominal voltages

  • and connection versions. (See data sheet 1.1-174)

HB0 HB4.5

Pressure relief valve Pilot operated Proportional Screw-in cartridge M33x2 Nominal pressure range pN

Sealing material

Manual override

Design-Index (Subject to change)

Armature tube closed (standard) With screwed sealing plug With manual emergency actuation

100 bar

100

200 bar

200

275 bar

275

350 bar

350

Metal housing, round Metal housing, square

W* M*

Connector socket EN 175301-803 / ISO4400 Connector socket AMP Junior-Timer Connector Deutsch DT04-2P

D J G

NBR FKM (Viton)

D1

SymbOlS

GeNeral SPeCIFICaTIONS

P(1)

T(2)

Description Construction Actuation Mounting

Ambient temperature Mounting position Fastening torque

Weight

Pilot operated pressure relief valve Screw-in cartridge for cavity acc. to ISO7789 Proportional solenoid Screw-in thread M33x2

  • -

    20…+70 °C

any, preferably horizontal MD = 80 Nm for screw-in cartridge MD = 5 Nm for knurled nut m = 0,7 kg

Tel. +41 33 672 72 72

E-mail: sales@wandfluh.com

Fax +41 33 672 72 12

Internet: www.wandfluh.com

Wandfluh AG

Postfach CH-3714 Frutigen

Illustrations not obligatory Data subject to change

Data sheet no.

2.3-551E 1/3 Edition 11 25

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