Bosch Rexroth | SL10PA1-4X
SL10PA1-4X/
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The SL10PA1-4X/ valve belongs to the Hy-Check Valves series from Bosch Rexroth and is used to control flow paths in hydraulic automation circuits. It opens when a set pilot pressure acts on its poppet, allowing reverse flow while holding the main line blocked under normal conditions. A subplate mounting connection integrates the unit into standardized manifolds without extra piping. The interface follows the ISO 5781-06-07-0-16 porting pattern so matching hardware can be selected quickly. Flow capacity is determined by the nominal size NG10, which matches medium-rate actuator lines. The poppet begins to lift at a cracking pressure of 1.5 bar, providing predictable relief during start-up. A factory-applied pre-opening feature moderates pressure shocks by allowing a small bypass before the main poppet shifts. The pilot stage works between 5 bar and 350 bar, and its control channel at port X holds 2.5 cm³ of oil, affecting response delay. An external pilot oil return prevents back-pressure inside the cover.
The valve body withstands a maximum operating pressure of 350 bar so it can sit directly in high-pressure pump lines. It operates with hydraulic fluid temperatures from −20 °C to +80 °C, covering cold start and elevated working conditions in mobile or stationary equipment. System cleanliness must reach ISO 4406 code 20/18/15 to protect the poppet surfaces and maintain low leakage. A pilot cavity at port Y stores 2.0 cm³ of oil, which influences the speed at which the check function resets after unloading. All dynamic seals are molded from NBR to balance elasticity with mineral oil compatibility. The subplate weighs 1.8 kg, keeping manifold stacks light enough for hand assembly during service. Together these limits and material selections define the environmental envelope and service behavior of the SL10PA1-4X/ valve in automated hydraulic networks.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Connection Type
Subplate Mounting
Cracking Pressure
1.5 bar
Hydraulic Fluid Temp Maximum
+80 °C
Hydraulic Fluid Temp Minimum
-20 °C
Maximum Operating Pressure
350 bar
Nominal Size
NG10
Pilot Oil Return
External
Pilot Pressure Maximum
350 bar
Pilot Pressure Minimum
5 bar
Pilot Volume (port X)
2.5 cm3
Pilot Volume (port Y)
2.0 cm3
Porting Pattern
ISO 5781-06-07-0-16
Pre-opening
With Pre-Opening
Seal Material
NBR
Weight (subplate)
1.8 kg
1620 Old Apex Road
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