Universal Hydraulik GmbH® heat exchangers, oil cooler, fail-safe cooler, oil-air cooler, oil-water cooler

Heat Exchangers
Oil/Water: AM
Oil/Water: EKM
Oil/Water: ECM
Oil/Water: CM
Oil/Water: SSCM
Oil/Water: Failsafe/AMFS
Oil/Water: UKM
Oil/Water: UKTM
Oil/Water: UKCG
Oil/Water: FKN
Oil/Air: LKI
Oil/Air: LKI-HYD
Oil/Air: LKM
Oil/Air: DF
Oil/Air: MA/BOL
Oil/Air: MF
Oil/Air: OCA
Oil/Air: PTÖK
Plates: TL
Plates: PWT
Thermo-Filter: TFSA
Cooling-Filter-Systems

Accessoires WRV

Accessoires TR 12
Pumps
Cylinder
Filters
Systems
Customer Support

m.uhl@universalhydraulik.com

Download Data sheet WRV
download
wrv1.pdf)

Water Regulating Valve
(Temperature Controlled)

Construction:
The WRV consists of an adjustment part, a valve and a thermostatic element. The spring housing of the adjustment part is provided with a neutral scale reading from 1 to 5. The valve housing has an internal thread to provide a connection facility for pipes. Sealing of the valve spindle is achieved with the help of rubber diaphragms which, at the same time, ensure that the valve operates almost independent from pressure ratios. The spindle is locates in slide bushes with O-rings. These O-rings are located outside the diaphragms and ensure additional safety and sealing. Thanks to the symmetric construction of the valve housing, the valve can operate as either opening valve (WRV-O) or closing valve (WRV-S). Any change in the operation of WRV-O or WRV-S valves is achieved by turning the valve housing, so that the identification marking "1/2 DA" is pointing to the upper part. The thermostatic element consists of a corrugated pipe, capillary tube and sensor.

Materials for parts coming into contact with water

Valve housing and remaining metal parts Brass (DIN 17660)
Diaphragms Ethylene-Propylene rubber
Valve cone: Nitrile rubber
Valve seat: Non-rusting steel (DIN 17440)
Sensor: Tinned copper (DIN 1787)
Capillary pipe stuffing box: Nitrile rubber

Function

The sensor internal pressure will increase as the temperature rises. This increase in pressure is transferred to the valve cone (8), which then opens to allow the flow. The valves are pressure relieved in such a way that any change in water pressure will not influence the valve setting. Apart from that, the valves operate independent from the ambient temperature. The universal filling ensures perfect valve operation, irrespective of whether or not the valve housing and corrugated pipe are warmer or colder than the sensor.