Direct Acting Relief Valves

*PRODUCT IMAGE IS REPRESENTATIVE PROVIDED BY THE MANUFACTURER. DO NOT MAKE BUYING DECISIONS SOLEY BASED ON THE IMAGE. PLEASE VERIFY SPECIFICATIONS MEET YOUR REQUIREMENTS.

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.

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SKU	Availability	Price	Body Material	Maximum Operating Pressure	Seal Material	Division	Minimum Operating Temperature	Maximum Kinematic Viscosity	Flow Rate	Actuation Type	Function	Configuration	Operation Type	Adjustment Mechanism	Wire Mesh Screen Included	Cavity Size	Weight	Maximum Flow Rate	For Fluid Type	Maximum Operating Temperature	Valve Material	Operating Temperature	Filter Efficiency Rating	Mounting Type	Maximum Tank Pressure	Maximum Inlet Pressure Rating	Installation Torque	Maximum Pressure Setting	Leak Rate	Reseat Pressure	Pressure Control Range	Standard Setting Pressure	Pressure Control Sensitivity	Seal Material	Adjustment Mechanism	Flow Rate	Maximum Inlet Pressure Rating	Pressure Control Range
RD102K18V	Backordered	$81.90	N/A	250 bar	Fluorocarbon	Hydraulic Systems Division	-26 °C	45-2000 SSU (6 to 420 cSt)	38 L/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Knob	n/a	C10-2	0.5 lb	38 L/min	Mineral-based or synthetic hydraulic fluids	+400 °F	All parts steel. All operating parts hardened steel	-26 to +204 °C	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	3000 psi	250 bar	50-56 Nm	124 bar	0.33 @ 75% Crack Pressure cm3/min	85% of pressure setting	13.8-124 bar	900 psi	16 per turn bar	Fluorocarbon	Knob	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	200-1800 PSI, 13.8-124 BAR
RD102K30	Backordered	$75.90	N/A	3600 psi	D-Ring (Standard)	Hydraulic Systems Division	-37 °C	45-2000 SSU (6 to 420 cSt)	10 Gal/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Knob	n/a	C10-2	0.23 kg	10 Gal/min	Mineral-based or synthetic hydraulic fluids	+93 °C	All parts steel. All operating parts hardened steel	-37 to +93 °C	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	210 bar	3600 psi	37-41 lb-ft	3000 psi	0.33 @ 75% Crack Pressure cm3/min	85% of pressure setting	41.4-210 bar	1500 psi	103.4 per turn bar	D-Ring (Standard)	Knob	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	600-3000 PSI, 41.4-210 BAR
RD102K30N	Backordered	$81.90	N/A	250 bar	Nitrile	Hydraulic Systems Division	-34 °C	45-2000 SSU (6 to 420 cSt)	38 L/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Knob	n/a	C10-2	0.23 kg	38 L/min	Mineral-based or synthetic hydraulic fluids	+250 °F	All parts steel. All operating parts hardened steel	-30 to +250 °F	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	3000 psi	3600 psi	50-56 Nm	3000 psi	5 @ 75% Crack Pressure drops/min	85% of pressure setting	600-3000 psi	103.4 bar	1500 per turn psi	Nitrile	Knob	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	600-3000 PSI, 41.4-210 BAR
RD102K30V	Backordered	$81.90	N/A	3600 psi	Fluorocarbon	Hydraulic Systems Division	-26 °C	45-2000 SSU (6 to 420 cSt)	38 L/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Knob	n/a	C10-2	0.23 kg	38 L/min	Mineral-based or synthetic hydraulic fluids	+204 °C	All parts steel. All operating parts hardened steel	-15 to +400 °F	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	210 bar	3600 psi	37-41 lb-ft	3000 psi	5 @ 75% Crack Pressure drops/min	85% of pressure setting	41.4-210 bar	103.4 bar	103.4 per turn bar	Fluorocarbon	Knob	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	600-3000 PSI, 41.4-210 BAR
RD102S03	Backordered	$61.80	N/A	3600 psi	D-Ring (Standard)	Hydraulic Systems Division	-37 °C	45-2000 SSU (6 to 420 cSt)	10 Gal/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Screw	n/a	C10-2	0.23 kg	38 L/min	Mineral-based or synthetic hydraulic fluids	+200 °F	All parts steel. All operating parts hardened steel	-37 to +93 °C	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	3000 psi	250 bar	50-56 Nm	300 psi	0.33 @ 75% Crack Pressure cm3/min	85% of pressure setting	50-300 psi	150 psi	2.7 per turn bar	D-Ring (Standard)	Screw	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	50-300 PSI, 3.5-20.7 BAR
RD102S03N	Backordered	$67.20	N/A	250 bar	Nitrile	Hydraulic Systems Division	-34 °C	45-2000 SSU (6 to 420 cSt)	10 Gal/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Screw	n/a	C10-2	0.23 kg	10 Gal/min	Mineral-based or synthetic hydraulic fluids	+121 °C	All parts steel. All operating parts hardened steel	-30 to +250 °F	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	3000 psi	250 bar	37-41 lb-ft	300 psi	5 @ 75% Crack Pressure drops/min	85% of pressure setting	50-300 psi	10.3 bar	39 per turn psi	Nitrile	Screw	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	50-300 PSI, 3.5-20.7 BAR
RD102S03V	Backordered	$67.20	N/A	3600 psi	Fluorocarbon	Hydraulic Systems Division	-26 °C	45-2000 SSU (6 to 420 cSt)	10 Gal/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Screw	n/a	C10-2	0.5 lb	38 L/min	Mineral-based or synthetic hydraulic fluids	+400 °F	All parts steel. All operating parts hardened steel	-15 to +400 °F	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	3000 psi	250 bar	37-41 lb-ft	20.7 bar	0.33 @ 75% Crack Pressure cm3/min	85% of pressure setting	50-300 psi	10.3 bar	2.7 per turn bar	Fluorocarbon	Screw	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	50-300 PSI, 3.5-20.7 BAR
RD102S09	2 in stock	$61.80	N/A	3600 psi	D-Ring (Standard)	Hydraulic Systems Division	-35 °F	45-2000 SSU (6 to 420 cSt)	10 Gal/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Screw	n/a	C10-2	0.5 lb	38 L/min	Mineral-based or synthetic hydraulic fluids	+200 °F	All parts steel. All operating parts hardened steel	-35 to +200 °F	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	210 bar	250 bar	37-41 lb-ft	62 bar	5 @ 75% Crack Pressure drops/min	85% of pressure setting	6.9-62 bar	31 bar	7.2 per turn bar	D-Ring (Standard)	Screw	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	100-900 PSI, 7-62 BAR
RD102S09N	Backordered	$67.20	N/A	3600 psi	Nitrile	Hydraulic Systems Division	-30 °F	45-2000 SSU (6 to 420 cSt)	38 L/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Screw	n/a	C10-2	0.5 lb	10 Gal/min	Mineral-based or synthetic hydraulic fluids	+250 °F	All parts steel. All operating parts hardened steel	-30 to +250 °F	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	210 bar	250 bar	37-41 lb-ft	900 psi	5 @ 75% Crack Pressure drops/min	85% of pressure setting	100-900 psi	31 bar	7.2 per turn bar	Nitrile	Screw	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	100-900 PSI, 7-62 BAR
RD102S09V	Backordered	$67.20	N/A	250 bar	Fluorocarbon	Hydraulic Systems Division	-15 °F	45-2000 SSU (6 to 420 cSt)	10 Gal/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Screw	n/a	C10-2	0.23 kg	38 L/min	Mineral-based or synthetic hydraulic fluids	+204 °C	All parts steel. All operating parts hardened steel	-26 to +204 °C	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	3000 psi	250 bar	37-41 lb-ft	900 psi	5 @ 75% Crack Pressure drops/min	85% of pressure setting	6.9-62 bar	31 bar	104 per turn psi	Fluorocarbon	Screw	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	100-900 PSI, 7-62 BAR
RD102S18	24 in stock	$61.80	N/A	3600 psi	D-Ring (Standard)	Hydraulic Systems Division	-35 °F	45-2000 SSU (6 to 420 cSt)	10 Gal/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Screw	n/a	C10-2	0.5 lb	38 L/min	Mineral-based or synthetic hydraulic fluids	+200 °F	All parts steel. All operating parts hardened steel	-37 to +93 °C	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	210 bar	250 bar	50-56 Nm	124 bar	0.33 @ 75% Crack Pressure cm3/min	85% of pressure setting	200-1800 psi	900 psi	16 per turn bar	D-Ring (Standard)	Screw	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	200-1800 PSI, 13.8-124 BAR
RD102S18N	Backordered	$67.20	N/A	250 bar	Nitrile	Hydraulic Systems Division	-34 °C	45-2000 SSU (6 to 420 cSt)	10 Gal/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Screw	n/a	C10-2	0.5 lb	10 Gal/min	Mineral-based or synthetic hydraulic fluids	+250 °F	All parts steel. All operating parts hardened steel	-30 to +250 °F	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	3000 psi	3600 psi	50-56 Nm	124 bar	5 @ 75% Crack Pressure drops/min	85% of pressure setting	200-1800 psi	62 bar	234 per turn psi	Nitrile	Screw	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	200-1800 PSI, 13.8-124 BAR
RD102S18V	Backordered	$67.20	N/A	250 bar	Fluorocarbon	Hydraulic Systems Division	-15 °F	45-2000 SSU (6 to 420 cSt)	38 L/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Screw	n/a	C10-2	0.5 lb	38 L/min	Mineral-based or synthetic hydraulic fluids	+400 °F	All parts steel. All operating parts hardened steel	-26 to +204 °C	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	210 bar	250 bar	50-56 Nm	124 bar	5 @ 75% Crack Pressure drops/min	85% of pressure setting	200-1800 psi	62 bar	16 per turn bar	Fluorocarbon	Screw	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	200-1800 PSI, 13.8-124 BAR
RD102S30	159 in stock	$61.80	N/A	3600 psi	D-Ring (Standard)	Hydraulic Systems Division	-37 °C	45-2000 SSU (6 to 420 cSt)	38 L/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Screw	n/a	C10-2	0.23 kg	10 Gal/min	Mineral-based or synthetic hydraulic fluids	+200 °F	All parts steel. All operating parts hardened steel	-35 to +200 °F	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	210 bar	3600 psi	37-41 lb-ft	210 bar	0.33 @ 75% Crack Pressure cm3/min	85% of pressure setting	41.4-210 bar	1500 psi	103.4 per turn bar	D-Ring (Standard)	Screw	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	600-3000 PSI, 41.4-210 BAR
RD102S30N	Backordered	$67.20	N/A	3600 psi	Nitrile	Hydraulic Systems Division	-30 °F	45-2000 SSU (6 to 420 cSt)	10 Gal/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Screw	n/a	C10-2	0.23 kg	38 L/min	Mineral-based or synthetic hydraulic fluids	+121 °C	All parts steel. All operating parts hardened steel	-34 to +121 °C	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	3000 psi	3600 psi	37-41 lb-ft	210 bar	0.33 @ 75% Crack Pressure cm3/min	85% of pressure setting	41.4-210 bar	1500 psi	1500 per turn psi	Nitrile	Screw	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	600-3000 PSI, 41.4-210 BAR
RD102S30V	Backordered	$67.20	N/A	3600 psi	Fluorocarbon	Hydraulic Systems Division	-26 °C	45-2000 SSU (6 to 420 cSt)	38 L/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Screw	n/a	C10-2	0.5 lb	38 L/min	Mineral-based or synthetic hydraulic fluids	+400 °F	All parts steel. All operating parts hardened steel	-26 to +204 °C	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	210 bar	250 bar	50-56 Nm	3000 psi	5 @ 75% Crack Pressure drops/min	85% of pressure setting	41.4-210 bar	103.4 bar	103.4 per turn bar	Fluorocarbon	Screw	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	600-3000 PSI, 41.4-210 BAR
RD102T03	Backordered	POR	N/A	3600 psi	D-Ring (Standard)	Hydraulic Systems Division	-37 °C	45-2000 SSU (6 to 420 cSt)	10 Gal/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Tamper Resistant	n/a	C10-2	0.23 kg	38 L/min	Mineral-based or synthetic hydraulic fluids	+200 °F	All parts steel. All operating parts hardened steel	-37 to +93 °C	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	3000 psi	3600 psi	50-56 Nm	20.7 bar	5 @ 75% Crack Pressure drops/min	85% of pressure setting	50-300 psi	10.3 bar	2.7 per turn bar	D-Ring (Standard)	Tamper Resistant	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	50-300 PSI, 3.5-20.7 BAR
RD102T03N	Backordered	POR	N/A	3600 psi	Nitrile	Hydraulic Systems Division	-30 °F	45-2000 SSU (6 to 420 cSt)	10 Gal/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Tamper Resistant	n/a	C10-2	0.5 lb	38 L/min	Mineral-based or synthetic hydraulic fluids	+121 °C	All parts steel. All operating parts hardened steel	-34 to +121 °C	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	3000 psi	3600 psi	37-41 lb-ft	300 psi	5 @ 75% Crack Pressure drops/min	85% of pressure setting	3.5-20.7 bar	150 psi	2.7 per turn bar	Nitrile	Tamper Resistant	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	50-300 PSI, 3.5-20.7 BAR
RD102T03V	Backordered	POR	N/A	250 bar	Fluorocarbon	Hydraulic Systems Division	-26 °C	45-2000 SSU (6 to 420 cSt)	38 L/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Tamper Resistant	n/a	C10-2	0.23 kg	38 L/min	Mineral-based or synthetic hydraulic fluids	+400 °F	All parts steel. All operating parts hardened steel	-15 to +400 °F	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	3000 psi	250 bar	50-56 Nm	20.7 bar	5 @ 75% Crack Pressure drops/min	85% of pressure setting	3.5-20.7 bar	150 psi	2.7 per turn bar	Fluorocarbon	Tamper Resistant	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	50-300 PSI, 3.5-20.7 BAR
RD102T09	Backordered	POR	N/A	3600 psi	D-Ring (Standard)	Hydraulic Systems Division	-37 °C	45-2000 SSU (6 to 420 cSt)	38 L/min	Pressure Sensing	Direct Acting	Pressure Relief	Automatic	Tamper Resistant	n/a	C10-2	0.23 kg	38 L/min	Mineral-based or synthetic hydraulic fluids	+93 °C	All parts steel. All operating parts hardened steel	-35 to +200 °F	ISO 4406 18/16/13, SAE Class 4	Screw in cartridge valve	210 bar	3600 psi	37-41 lb-ft	900 psi	5 @ 75% Crack Pressure drops/min	85% of pressure setting	6.9-62 bar	31 bar	7.2 per turn bar	D-Ring (Standard)	Tamper Resistant	10 GAL/MIN, 38 L/MIN	3600 PSI, 250 BAR	100-900 PSI, 7-62 BAR

Direct Acting Relief Valves

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