PARKER HANNIFIN part description

Parker’s selection of direct acting relief valves are fast acting and designed for continuous duty applications with pressures up to 420 bar (6000 psi) and flows up to 200 lpm (53 gpm) in a variety cavity sizes. The variety of pressure adjustment styles available makes these valves an economical solution for clipping pressure spikes and can handle up to full system flow if needed. Poppet style direct acting valves have low leak conditioned seats and are ideal port reliefs in cylinder control applications. Parker’s small, low flow, direct acting valves perform well when controlling pilot circuits or limiting load sense pressure.

Markets:
• Miscellaneous Industrial
• Miscellaneous Manufacturing
• Miscellaneous Mobile

Features/Benefits:
• Hardened, precision ground parts for durability
• Compact size for reduced space requirements
• Low leakage design poppet design available
• Fast response
• All external parts zinc plated
• High pressure (6000 psi) product available in some models
• Adjustable, fixed, or tamper resistant adjustments available
• Multiple spring ranges are available
• All valves are 100 % tested

Applications:
• Port/cross-port relief
• System relief
• Pilot and/or load sense relief
• Braking

Additional Technical Insight:
Full flow direct acting relief valves can be used as a main system relief valves in low flow circuits. Direct acting valves are fast acting, therefore, these devices and can be an economical solution for clipping pressure spikes. Poppet style direct acting valves have low leak conditioned seats and are often used as a port relief in a cylinder control applications. Small, low flow, direct acting valves are ideal for controlling pilot circuits or limiting load sense pressure.

Specifications

Rated Flow (gpm) 8
Rated Flow (lpm) 30
Maximum Inlet Pressure (psi) 6000
Maximum Inlet Pressure (bar) 420
Maximum Tank Pressure (psi) 6000
Maximum Tank Pressure (bar) 420
Maximum Pressure Setting (psi) 6000
Maximum Pressure Setting (bar) 420
Leak Rate (dpm) 5 @ 1450 PSI (100 BAR)
Leak Rate (cc/min) 0.33 @ 1450 PSI (100 BAR)
Cavity size C08-2
Pressure Range Adjustment (psi) 72-6000
Pressure Range Adjustment (bar) 5-420
Adjustment Type Screw Adjust
Standard Setting Pressure (psi) 2900
Standard Setting Pressure (bar) 200
Pressure Control Sensitivity (psi) 881 per turn
Pressure Control Sensitivity (bar) 60.7 per turn
Reseat Pressure (%) N/A
Wire Screen N/A
Seal Material Nitrile
Operating Temperature (F) -30° to +250°
Operating Temperature (C) -34° to +121°
Valve Materials All parts steel. All operating parts hardened steel
Rated Fluid Viscosity (cSt) Mineral-based or synthetic with lubricating properties at viscosities of 45-2000 SSU (6 to 420 cSt)
Filtration Ratings ISO 4406:1999 Code 18/16/13
Weight (lb) 0.44
Weight (kg) 0.2
Installation Torque (lbs/ft) 30
Installation Torque (Nm) 40
CE certification N/A

Parker Hannifin® is a global leader in motion and control technologies. Included in the world's Fortune 250 companies, Park Hannifin's products are vital not only to automobiles but also to almost everything that moves or needs control. These include all forms of transportation, manufacturing and processing raw materials, as well as infrastructure development and construction. Established in 1918, the Parker Appliance Company's evolution into Parker Hannifin Corporation demonstrates a legacy of innovation and Parker's tradition of excellence. Parker Hannifin's product portfolio includes solenoid valves, hydraulic fittings, pressure relief valves, hydraulic pumps, polyurethane tubing, thermal and power management products, and other parts for climate control, hydraulics, filtration, fluid and gas handling, pneumatics, sealing and shielding, and many other applications. 

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