Check Valves ERV

Description

ERV 8, ERV 8-600:
These pilot-operated check valves are size 8, two stage, high performance screw-in cartridges with an (ERV 8: M30x1.5 / ERV 8-600: M34x1.5) mounting thread. The conical-seat design ensures that the cartridges are leak-tight from B → A. The check function can be overridden by applying a suitable pilot pressure at port X. In the A → B direction, flow can pass freely through the valve (opening pressure = 2.5 bar). These screw-in cartridges are predominantly used in certain mobile and industrial applica­tions to maintain the position of loaded actuators (e.g. out­rigger cylinders) after the pump pressure has been disconnected.

ERV 08-PH:
The proportional, pilot operated check valves are pilot con­trolled, high performance screw-in cartridges with an M30x1.5 mounting thread size 08. For the lifting function (A → B) only the pretension force of the check valve has to be overcome. The conical seat design ensures that the car­tridges are leak-free from B → A. The check function can be overridden by applying a suitable pilot pressure at port X. In the B → A direction, flow can pass freely through the valve (opening pressure corresponds to the pilot pressure X pilot ratio). The lowering function can thus be controlled proportionally. These screw-in cartridges are predominantly used in cer­tain mobile and stationary applications. This product is in­tended for use on outrigger cylinders. All exposed parts of the cartridge are zinc-nickel coated according to DIN 50 979, allowing them to be used even under extreme external conditions.

Advantages

  • Load pressure closing cone poppet valve
  • Virtually leak-free in no-flow direction
  • Hardened and ground seat section on seat bore and piston
  • ERV 8, ERV 8-600: two-stage principle (decompression / main opening)
  • ERV 08-PH: proportional, pilot operated

Technical Data

Type Nominal flow rate
l/min
Operating pressure, dynamic
bar
Operating pressure, static
bar
Area ratio
ERV 8 80 450 600 1:2.5/ 2.1:1
ERV 8-600 80 600 600 1:2.5 / 2.1:1
ERV 08-PH 50 450 600 1:2.56

Models

ERV 8, ERV 8-600

ERV 08-PH

Applications

  • Outrigger cylinders on mobile machines
 

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