RELIEF VALVE

Details

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

More Information

More Information
Maximum Operating Pressure	5500 psi
Maximum Operating Temperature	250 °F, 121 °C
Minimum Operating Temperature	-30 °F, -34 °C
Weight Parker	0.19 kg, 0.43 lb
Body Material	N/A
Seal Material	Nitrile
Flow Rate	12 gal/min, 45 L/min
For Fluid Type	Mineral-based or synthetic hydraulic fluids
Configuration	Differential Area Relief, Differential Relief w/Reverse Flow Check
Mounting Type	Screw in cartridge valve
Pressure Control Range	1000-3000 psi, 69-210 bar
Maximum Inlet Pressure Rating	380 bar, 5500 psi
Maximum Tank Pressure	350 bar, 5000 psi
Maximum Flow Rate	12 gal/min, 45 L/min
Actuation Type	Pressure Sensing
Installation Torque	23 lb-ft, 31 Nm
Pressure Control Sensitivity	396 per turn psi, 27 per turn bar
Valve Material	All parts steel. All operating parts hardened steel.
Standard Setting Pressure	1500 psi, 103.5 bar
Maximum Pressure Setting	3000 psi, 210 bar
Filter Efficiency Rating	ISO 4406 18/16/13, SAE Class 4
Maximum Kinematic Viscosity	45-2000 SSU (6 to 420 cSt)
Adjustment Mechanism	Screw
Cavity Size	C08-2
Operation Type	Automatic
Function	Direct Acting
Operating Temperature	-30 to +250 °F, -34 to +121 °C
Minimum Operating Pressure	380 bar
Port Thread Size	N/A
Cracking Pressure	N/A psi, N/A
Leak Rate	10 @ 75% Crack Pressure drops/min, .66 @ 75% Crack Pressure cm3/min
Reseat Pressure	75% of pressure setting

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