Bosch Rexroth | SL30PB2-4XV
SL30PB2-4X/V
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The SL30PB2-4X/V valve is part of the Hy-Check Valves series manufactured by Bosch Rexroth for directional blocking in hydraulic automation. It is produced in nominal size NG32 and permits a maximum flow of 550 l/min. Flow passes freely from port A to port B, while reverse flow from B to A depends on pilot actuation, establishing controlled one-way behavior. A cracking pressure of 5.0 bar determines the initial opening point, and the absence of any pre-opening feature keeps the poppet seated until that threshold is reached. Installation uses subplate mounting with the ISO 5781-09-13-0-16 porting pattern, and FKM seals maintain compatibility with typical hydraulic oils. Operation requires system fluid cleanliness of ISO 4406 20/18/15 to protect internal surfaces.
The body sustains a maximum operating pressure of 315 bar and must be secured with mounting screws tightened to 58 Nm. Pilot oil returns externally through port Y, and the internal pilot chambers have volumes of 19.27 cm³ for port X and 17.5 cm³ for port Y, values used when calculating switching dynamics. The valve weighs 7.8 kg, so it can be handled without lifting equipment in most assembly situations. A mean time to dangerous failure of 150 years indicates long functional reliability in safety-oriented machinery.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Connection Type
Subplate Mounting
Cracking Pressure
5.0 bar
Direction Of Flow
A→B Free; B→A When Opened
Max Flow
550 l/min
Max Operating Pressure
315 bar
Mounting Screw Torque
58 Nm
Mttfd
150 Years
Nominal Size
NG32
Pilot Oil Return
External (Port Y)
Pilot Volume (port X)
19.27 cm3
Pilot Volume (port Y)
17.5 cm3
Porting Pattern
ISO 5781-09-13-0-16
Pre-opening
None
Seal Material
FKM
Weight
7.8 kg
1620 Old Apex Road
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