Bosch Rexroth | S20P30-1XV
S20P30-1X/V
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The S20P30-1X/V is a check valve from the Type S Check Valves series manufactured by Bosch Rexroth for hydraulic automation where reverse flow must be blocked. It is supplied in size 20, so it fits circuits that follow this nominal port dimension. A body diameter of 42 mm defines the outer envelope and helps designers allocate installation space. Length L2 is limited to 15.5 mm, allowing the valve to sit with minimal stack height in manifold cavities. At 1.0 kg, the unit can be handled easily during assembly, while a wrench size of 36 mm provides the hex required for secure tightening. The cracking pressure is set at 3.0 bar, establishing the differential pressure needed before flow begins. A maximum operating pressure of 450 bar permits use in high-pressure loops common in mobile and industrial equipment. The mean time to dangerous failure is 150 years, indicating long functional reliability under defined conditions.
The fluid temperature window spans from −30 °C to 80 °C, so the valve can operate in cold starts and moderate heat without seal degradation. Acceptable hydraulic media include HL, HLP, HLPD, HVLP, and HVLPD mineral oils, giving users compatibility with common lubricating and detergent formulations. A minimum viscosity of 2.8 mm²/s ensures adequate film strength at elevated temperatures, while the maximum viscosity limit of 500 mm²/s prevents sluggish response in cold oil. Cleanliness class 20/18/15 under ISO 4406 defines the particle contamination level that must be maintained to avoid seat erosion and ensure consistent sealing performance.
Technical Specifications
Body Diameter (Ød1)
42 mm
Cleanliness Class (iso 4406)
20/18/15
Cracking Pressure
3.0 bar
Hydraulic Fluid (mineral Oils)
HL, HLP, HLPD, HVLP, HVLPD
Length L2
15.5 mm
Max Fluid Temperature
80 °C
Max Operating Pressure
450 bar
Max Viscosity
500 mm²/s
Min Fluid Temperature
-30 °C
Min Viscosity
2.8 mm²/s
Mttfd
150 years
Size
20
Weight
1.0 kg
Wrench Size (sw)
36 mm
1620 Old Apex Road
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