Bosch Rexroth | SV20PA2-4XV
SV20PA2-4X/V
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The SV20PA2-4X/V valve is built by Bosch Rexroth as part of the Hy-Check Valves series and serves to block or allow hydraulic flow under pilot control in automation circuits. Subplate mounting simplifies installation in manifolds, and the ISO 5781-08-10-0-16 porting pattern aligns the body with standardized plates. The design includes a pre-opening feature to soften pressure transients when the poppet moves. A cracking pressure of 5 bar keeps the line sealed until the set differential is reached, after which the internal pilot oil return directs control fluid back into the main gallery. Pilot pressure can vary between 5 and 315 bar, matching the 315 bar maximum operating pressure of the main stage. With a mass of 4.7 kg, the unit is light enough for routine handling during service.
The valve processes hydraulic fluids with viscosities from 2.8 to 500 mm²/s, ensuring consistent damping of the poppet across thin or heavy oils. FKM seals withstand chemical additives and permit ambient operation from −15 °C to +80 °C. A pilot volume of 10.8 cm³ at port X provides adequate oil for rapid command response without external accumulators. Cleanliness to ISO 4406 20/18/15 is required to protect the seating surfaces from particle abrasion. These parameters enable the SV20PA2-4X/V to deliver reliable check and pilot-to-open performance within the specified pressure range for industrial hydraulic systems.
Technical Specifications
Ambient Temp Max
+80 °C
Ambient Temp Min
-15 °C
Cleanliness Class
ISO 4406 20/18/15
Connection Type
Subplate Mounting
Cracking Pressure
5 bar
Maximum Operating Pressure
315 bar
Pilot Oil Return
Internal
Pilot Pressure Max
315 bar
Pilot Pressure Min
5 bar
Pilot Volume Port X
10.8 cm3
Porting Pattern
ISO 5781-08-10-0-16
Pre-opening
Yes
Seal Material
FKM
Viscosity Max
500 mm2/s
Viscosity Min
2.8 mm2/s
Weight
4.7 kg
1620 Old Apex Road
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