Parker Hannifin RDH103S30V - Direct Acting Differential Area Relief Valves

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