Parker Hannifin RDH101S30 - Direct Acting Relief Valves

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)	0.5
Rated Flow (lpm)	1.9
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 (dpm)	5 @ 80% Crack Pressure
Leak Rate (cc/min)	0.33 @ 80% Crack Pressure
Cavity size	C10-2
Pressure Range Adjustment (psi)	200-3000
Pressure Range Adjustment (bar)	13.8-345
Adjustment Type	Screw Adjust
Standard Setting Pressure (psi)	1500
Standard Setting Pressure (bar)	103
Pressure Control Sensitivity (psi)	859 per turn
Pressure Control Sensitivity (bar)	58.9 per turn
Reseat Pressure (%)	90%
Wire Screen	N/A
Seal Material	D-Ring (Standard)
Operating Temperature (F)	-50° to +270°
Operating Temperature (C)	-45° to +132°
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)	0.4
Weight (kg)	0.18
Installation Torque (lbs/ft)	37-41
Installation Torque (Nm)	50-56
CE certification	N/A