Bosch Rexroth | SL30PA2-4XV
SL30PA2-4X/V
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The SL30PA2-4X/V valve belongs to the Hy-Check Valves series and is manufactured by Bosch Rexroth for hydraulic automation circuits where flow must be blocked or released on command. It withstands a maximum operating pressure of 315 bar, allowing integration into high-pressure manifolds. The element opens once the line reaches a cracking pressure of 5 bar, so low-pressure loss starts the flow. A maximum flow capacity of 550 l/min supports large actuators without excessive restriction. The ISO 5781-09-13-0-16 porting pattern aligns with standard subplate layouts for simplified installation. FKM seals are fitted to maintain leakage control with a broad range of hydraulic media. System oil must meet ISO 4406 class 20/18/15 cleanliness to prevent premature wear of internal surfaces. Acceptable viscosity extends from 2.8 mm²/s up to 500 mm²/s, covering common mineral and synthetic fluids.
The pilot stage of the SL30PA2-4X/V accommodates a maximum pilot pressure of 315 bar, letting the control line match main system pressure. Pilot actuation starts at a minimum of 5 bar, enabling remote opening with modest control power. When port X is used, the internal volume to be pressurized is 19.27 cm³, which influences response time in long pilot lines. Port Y presents a smaller volume of 17.5 cm³ to shorten fill time when that connection is selected. The valve functions in ambient temperatures down to –15 °C, ensuring outdoor machinery can start in cold climates. Operation continues so long as ambient temperature does not exceed +80 °C, protecting elastomers and internal fits. The hydraulic medium may be cooled only to –15 °C, below which viscosity and seal performance could be compromised. Conversely, the fluid must not be hotter than +80 °C to avoid damaging the FKM sealing elements.
Technical Specifications
Ambient Temp Max (fkm)
+80 °C
Ambient Temp Min (fkm)
-15 °C
Cleanliness Class
ISO 4406 20/18/15
Cracking Pressure
5 bar
Fluid Temp Max (fkm)
+80 °C
Fluid Temp Min (fkm)
-15 °C
Maximum Flow
550 l/min
Maximum Operating Pressure
315 bar
Maximum Pilot Pressure
315 bar
Minimum Pilot Pressure
5 bar
Pilot Volume Port X
19.27 cm3
Pilot Volume Port Y
17.5 cm3
Porting Pattern
ISO 5781-09-13-0-16
Seal Material
FKM
Viscosity Max
500 mm2/s
Viscosity Min
2.8 mm2/s
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