Single Pilot Operated, Pilot to Open Check Valves | #D4A040V


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D4A040V D4A040V

Single Pilot Operated, Pilot to Open Check Valves | #D4A040V OBSOLETE

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Technical Specifications

  • Maximum Flow Rate: 16 GAL/MIN, 60 L/MIN
  • Cracking Pressure: 43.5 PSI, 3 BAR
  • Seal Material: Fluorocarbon
  • Division: Mobile Hydraulic Systems Division Europe
  • Maximum Flow Rate: 16 gal/min, 60 L/min
  • Cracking Pressure: 43.5 psi, 3 bar
  • Seal Material: Fluorocarbon
  • Actuation Type: Pilot Operated
  • Flow Rate: 8.5 Gal/min @ 100 Psi (7 bar) Nominal, 32 L/min @ 100 Psi (7 bar) Nominal
  • Maximum Operating Pressure: 6000 psi, 420 bar
  • Maximum Inlet Pressure Rating: 6000 psi, 420 bar
  • Leak Rate: 3 drops/min @ 6000 Psi (420 bar)
  • Cavity Size: 68-1
  • Function: Single Pilot to Open Check
  • Flow Direction: 2-1 Free Flow
  • Pilot Pressure Ratio: 4:1
  • Pilot Location: 3
  • For Fluid Type: Mineral-based Hydraulic Fluids, Synthetic Hydraulic Fluids
  • Maximum Kinematic Viscosity: 45-2000 SSU (6 to 420 cSt)
  • Filter Efficiency Rating: ISO 4406 18/16/13, SAE Class 4
  • Valve Material: Steel (all parts), Hardened Steel (all operating parts)
  • Installation Torque: 40 lb-ft, 54 Nm
  • Operating Temperature: -15 to 400 °F, -26 to 204 °C
  • Maximum Operating Temperature: 400 °F, 204 °C
  • Minimum Operating Temperature: -15 °F, -26 °C
  • Weight: 0.33 lb, 0.15 kg
  • Body Material: n/a
Safety Warning

Item Information

Pilot operated check valves, also known as PO checks, are used to lock a cylinder in a holding position with minimal leakage or drift. PO check valves that can be opened to allow flow in the reverse direction with an external signal to the pilot port. The valves work best when used in conjunction with a control valve that vents the valve ports to tank when centered. Pilot pressure to open the checks for reverse flow is a ration of the holding pressure. Typical ratios are 3:1 or 4:1. A 3:1 ratio with a 3000psi load requires a 1000psi signal to the pilot port. Typical applications are cylinder holding in any type of mobile or industrial machinery. Pilot to close checks are a normally open version of PO checks, whereby a pilot signal is required to close, not open, the check valve. Typical applications are for cylinders when requiring a re-generation function.

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CAD Drawings + Files

Part Number
D4A040V IGS STP

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Where to Buy

Local Contact

South Africa Headoffice

Parker Hannifin (Africa) Pty LTD

Sales Company South Africa

10 Berne Avenue

Aeroport

Kempton Park

Gauteng

South Africa

1620

Phone

0027 11 961 0700

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