S20P15-1X/V

The S20P15-1X/V check valve belongs to the Type S Check Valves series and is produced by Bosch Rexroth. It supports hydraulic automation by allowing flow in one direction and stopping reverse flow in pressure lines. The valve is supplied in nominal size 20 so circuit designers can match it to corresponding port dimensions. A body diameter of 42 mm provides the necessary wall thickness for high pressure containment, while a 36 mm hex across flats lets technicians apply standard wrenches during installation. The unit employs a threaded connection, simplifying integration into manifolds or pipe runs without welding. A cracking pressure preset at 1.5 bar ensures the valve opens only after the system reaches the intended minimum pressure, protecting pumps from low-load operation. The assembly withstands a maximum operating pressure of 450 bar to cover heavy-duty industrial circuits, and its 1.0 kg weight aids handling when mounting in confined panels.

Fluid compatibility follows DIN 51524, so conventional mineral hydraulic oils can be used without additional testing. The valve functions between −30 °C and 80 °C, covering typical cold-start and full-load oil temperatures, while water-glycol media are limited to 60 °C to preserve seal life. Acceptable viscosity spans from 2.8 mm²/s to 500 mm²/s, allowing operation with low-viscosity start-up oils and high-viscosity grades found in hot climates. System cleanliness must meet ISO 4406 code 20/18/15 to prevent particulate damage to the seat and poppet. A mean time to dangerous failure of 150 years contributes to high functional safety targets in long-life machinery. These parameters round out the product data by defining the operating envelope and maintenance expectations for designers who specify this check valve in automated hydraulic equipment.