Proportional- pressure relief valves
Proportional pressure relief valve Screw-in cartridge
= 230 l/min
= 400 bar
• pN max
= 350 bar
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
B V P PM33 -
Only available in conjunction with other nominal voltages
and connection versions. (See data sheet 1.1-174)
Pressure relief valve Pilot operated Proportional Screw-in cartridge M33x2 Nominal pressure range pN
Design-Index (Subject to change)
Armature tube closed (standard) With screwed sealing plug With manual emergency actuation
Metal housing, round Metal housing, square
Connector socket EN 175301-803 / ISO4400 Connector socket AMP Junior-Timer Connector Deutsch DT04-2P
D J G
NBR FKM (Viton)
Description Construction Actuation Mounting
Ambient temperature Mounting position Fastening torque
Pilot operated pressure relief valve Screw-in cartridge for cavity acc. to ISO7789 Proportional solenoid Screw-in thread M33x2
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
Fax +41 33 672 72 12
Postfach CH-3714 Frutigen
Illustrations not obligatory Data subject to change
Data sheet no.
2.3-551E 1/3 Edition 11 25