PARKER CPH124P

PARKER, Single Pilot Operated,
Pilot to Open Check Valves
Part #: CPH124P

PARKER, Single Pilot Operated, Pilot to Open Check Valves

Part #: CPH124P

N.America Only - Parker’s P.O. check valve assemblies allow flow up to 150 lpm (40 gpm) with pressures up to 420 bar (6,000 psi). Return flow can be enable by an external pilot supply, which shifts the internal poppet into an open position.

Technical Specifications

Division:	Hydraulic Cartridge Systems Division
Maximum Flow Rate:	20 Gal/min, 75 L/min
Maximum Flow Rate:	20 GAL/MIN, 75 L/MIN
Cracking Pressure:	25 PSI, 1.7 BAR
Seal Material:	Nitrile
Cracking Pressure:	25 psi, 1.7 bar
Seal Material:	Nitrile
Actuation Type:	Pilot Operated
Flow Rate:	N/A L/min
Maximum Operating Pressure:	5000 psi, 350 bar
Maximum Inlet Pressure Rating:	5000 psi, 350 bar
Leak Rate:	5 @ 5000 PSI (350 BAR) drops/min
Cavity Size:	C12-3
Function:	Single Pilot to Open Check
Flow Direction:	2 - 3 Free Flow
Pilot Pressure Ratio:	3:1
Pilot Location:	1
For Fluid Type:	Mineral-based or 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:	All parts steel. All operating parts hardened steel
Installation Torque:	56 lb-ft, 76 Nm
Operating Temperature:	-30 to +250 °F, -34 to +121 °C
Maximum Operating Temperature:	+250 °F, +121 °C
Minimum Operating Temperature:	-30 °F, -34 °C
Weight:	0.44 lb, 0.2 kg
Body Material:	N/A

Item Information

Parker’s reliable pilot piston style P.O. check valves are designed for critical applications where safety and load holding is required and flows from 19 to 150 lpm (5 to 40 gpm) and pressures up to 420 bar (6,000 psi) are needed. These valves are available with pilot supply to either the 1st port or 3rd port depending on circuit need, and are generally used in conjunction with linear actuators across several markets within mobile or industrial hydraulics, such as aerials, material handling, and construction where durable and low leak valves are necessary to keep the machinery and operators safe.

Markets:
• Aerial
• Construction
• Material Handling
• Miscellaneous Mobile

Features/Benefits:
• Spherical poppet for low leakage
• Hardened precision ground parts for durability
• “D”-Ring design eliminates back-up rings
• Optional sealed pilot piston

Applications:
• Load holding without fine metering

Additional Technical Insight:
Pilot operated check valves, also known as P.O. checks, are used to lock a cylinder in a holding position with minimal leakage or drift. P.O. 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 ratio of the holding pressure, and are typically 3:1 or 4:1. A 3:1 ratio with a 3000psi load requires a 1000psi signal to the pilot port.