PARKER HANNIFIN part description

Parker's selection of differential area relief valves provide excellent pressure control in applications where a fast acting, low leakage relief valves are needed with operating pressures up to 380 bar (5500 psi) and flows up to 151 lpm (40 gpm) through a wide selectin of cartridge sizes. Unlike the direct acting family of relief valves, Parker's differential area relief valves are designed to have the pressure controlled at port 2 of the cavity. This ensures low leakage across the valve, essential in some holding applications. Designed using industry common cavities, Parker’s line of differential area reliefs can easily be used in various mobile and industrial system applications.

Markets:
• Agriculture
• Aerial
• Construction Equipment
• Industrial
• Miscellaneous Manufacturing
• Miscellaneous Mobile

Features/Benefits:
• Fast acting differential area reliefs for high flow capacity
• Low leak spherical poppets
• High flow capacity
• Mechanical stops eliminate spring solidification
• All external parts zinc plated

Applications:
• Port relief
• Swing relief
• Motor braking
• Cross port relief applications

Specifications

Rated Flow (gpm) 20
Rated Flow (lpm) 75
Maximum Inlet Pressure (psi) 5500
Maximum Inlet Pressure (bar) 380
Maximum Tank Pressure (psi) 5000
Maximum Tank Pressure (bar) 350
Maximum Pressure Setting (psi) 3000
Maximum Pressure Setting (bar) 207
Leak Rate (drops/min) 5 @ 75% Crack Pressure
Leak Rate (cc/min) .33 @ 75% Crack Pressure
Cavity size C10-2
Pressure Range Adjustment (psi) 500-3000
Pressure Range Adjustment (bar) 34.5-207
Adjustment Type Screw Adjust
Standard Setting Pressure (psi) 1500
Standard Setting Pressure (bar) 103.5
Pressure Control Sensitivity (psi) 375 per turn
Pressure Control Sensitivity (bar) 25.8 per turn
Reseat Pressure (%) 0.85
Cracking Pressure (psi) N/A
Cracking Pressure (bar) N/A
Seal Material Fluorocarbon
Operating Temperature (F) -15° to +400°
Operating Temperature (C) -26° to +204°
Valve Materials All parts steel. All operating parts hardened steel
Body Material N/A
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) 0.5
Weight (kg) 0.23

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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