Eaton Proportional Valves

Proportional solenoid valves for pressure and flow control. 

The EPV10 has several outstanding performance features which give it a unique position in the screw-in cartridge valve market. Valve gain linearity, flow force pressure compensation characteristics above 20 bar (300psi) and low internal leakage.

The EPV16 is a proportionally controlled two-way poppet type valve. The main poppet amplifies a small flow through the pilot  circuit and is comparable to a transistor. As the transistor uses small currents to control larger currents, the hydraulic valve transistor or VALVISTOR uses the pilotflow to control the main stage flow with servo-like response flow to control.

The EFV1 is a proportionally controlled two-way, spool type flow control valve. Technically the valve is not pressure compensated, but at high differential pressures it is partially flow force pressure compensated. For fully pressure compensated flow control applications with the EFV1 valve it is necessary to employ a compensation element such as a DPS2 or PCS valve as described in section K.

The ERV1-10 is an electric, proportionally controlled, internally pilot operated, spool type screw-in relief valve. It is capable of handling flows from 3,8-60,0 L/min (1-15 USgpm) at pressures from 35-210 bar (500-3000 psi).

Also available is an ERV1-16 which is capable of handling flows from 7,6-132 L/min. (2-35 USgpm) at pressures from 35-210 bar (100-500 psi).

The ERV2-10 is a low flow electric proportionally controlled relief valve similar to the ERV1-10. This valve is rated for flows from 0,2-2,8 L/min (0.05-0.75 USgpm) and pressures up to 35 bar (500 psi).

The EPRV1-10 is an electric, proportionally controlled, internally pilot operated, spool type, screw-in pressure reducing/relieving valve. It is capable of handling flows from 0-7,6 L/min (0-20 USgpm) at set pressures from 14-35 bar (200-500 psi). Also available is an ERV1-16 which is capable of handling flows from 0-38 L/min (0-10 USgpm) at set pressures from 14-35 bar (200-500 psi).

Vickers proportional pressure and flow control valves are designed to be easily controlled by the simplest of DC electrical devices such as a 12 volt battery and a potentiometer. Varying the voltage at the coil is one of the simplest means of control available.

Any of the Vickers DC coils will work on most of these valves simply by varying the voltage between 0 and 75% of the rated coil voltage. It should be noted that as the operating temperature of a coil increases, the solenoid force decreases. Therefore if the voltage is held constant as the coil heats up then valve pressure (or flow) will change.