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Pilot Operated Check Valves ERV

Pilot Operated Check Valves ERV

Pilot Operated Check Valves ERV

Product catalog summary
Overview:
Pilot operated check valves are designed to allow leak-free flow from port B to port A while blocking flow from A to B. By applying hydraulic pilot pressure at port X, the flow from A to B can be unblocked. The ports A, B, and X are sealed to prevent internal leakage. The valve's screw-in cartridge design allows for easy installation into a simple stepped bore.

Specifications:
  • Nominal Sizes: ERV 3, ERV 4, ERV 6
  • Flow Rates: 3.5 l/min (ERV 3), 8 l/min (ERV 4), 15 l/min (ERV 6)
  • Pilot Ratios (A:X): 3.8 (ERV 3), 3.3 (ERV 4), 3.7 (ERV 6)
  • Opening Pressure (B – A): 0.64 bar (ERV 3), 0.18 bar (ERV 4), 0.37 bar (ERV 6)
  • Tightening Torque: 12 Nm (ERV 3), 20 Nm (ERV 4), 25 Nm (ERV 6)

General Technical Data:
  • Permissible Pressure: 700 bar (10153 psi)
  • Temperature Range: -40 to +80 °C (-40 to +176 °F)
  • Viscosity Range: 5 - 500 cSt
  • Medium: Hydraulic oil
  • Installation Position: Any

Design Features:
  • Patented spherical rocket shell design
  • Screw-in cartridge design for easy installation

Installation Dimensions:
  • ERV 3: G 1/8, L 21 mm, SW 4 mm, D 8H7 mm
  • ERV 4: G 1/4, L 24.8 mm, SW 5 mm, D 10H7 mm
  • ERV 6: G 3/8, L 29.7 mm, SW 7 mm, D 14H7 mm

Recommendations:
  • For strong impacts and vibrations, secure valves with Loctite or similar.
  • Ensure minimum depth of engineering fit for bore "D".
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Catalog excerpts

Pilot Operated Check Valves ERV-1

HYTftRC’ Technologies Entsperrbare Ruckschlagventile Pilot Operated Check Valves ERV mit Kugelschale - patentiert Einschraubausfuhrung Nennweite ERV 3 - ERV 4 - ERV 6 Betriebsdruck 700 bar with spherical rocket shell - patented Screw-in cartridge design Nominal size ERV 3 - ERV 4 - ERV 6 Operating pressure 10000 psi Allgemeines: Entsperrbare Ruckschlagventile sind leckfreie Sperrventile, bei denen die Durchflussrichtung von B nach A frei und von A nach B normal gesperrt ist. Durch Anlegen eines hydraulischen Steuer-drucks an Anschluss X kann das Ruckschlagventil entsperrt wer-den. Der Durchfluss von A nach B ist dann ebenfalls freigegeben. Die Anschlusse A - B - X sind leckfrei zueinander abgedichtet. Die Einschraubpatrone des entsperrbaren Ruckschlagventils ist so ausgebildet, dass sie in eine einfache Stufenbohrung einge-schraubt werden kann. General: Pilot operated check valves are leak free valves with free flow from port B to port A and blocked flow from A to B. By a pilot pressure at port X the flow direction from A to B is unblocked and there is free flow. The ports A - B - X are sealed against each other to avoid internal leakage. The screw-in cartridge of the pilot operated check valve is designed in that way that it can be screwed into a simple stepped bore. Allgem. techn. Daten: Zul. Druck in A-B-X = 700 bar Zul. Temperatur: -40 - +80 °C Viskositatsbereich: 5 - 500 cSt Druckmittel: Hydraulikol Einbaulage: beliebig Gen. technical data: Perm. operation pressure to A-B-X = 10153 psi Perm. operation temperature: -40 - +176 °F Viscosity range: 5 - 500 cSt Medium: hydraulic oil Installation position: any Ausgabe / Issue: 2017-01 Technische Anderungen vorbehalten / Reserve technical changes

 Open the catalog to page 1
Pilot Operated Check Valves ERV-2

Einschraubbohrung/Screw-in drill Typ Type Y - Gewindeauslauf. Er darf kleiner sein, aber nicht grower V - Mindesttiefe ohne Verschlussschraube, Verschraubung, Querbohrung usw. Bei starken StoGen und Vibrationen empfiehlt es sich, die Ventile mit Loctite o. a. zu sichern. W - Mindesttiefe der Passung der Bohrung "D" Y - thread run-out. It can be shorter, but not longer V - minimum depth without plug, thread joint, transverse bore etc. In case of stronger impacts and vibrations it is recommended that the valves be secured with loctite or similar. W - Minimum depth of engineering fit of bore „D“...

 Open the catalog to page 2

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