Z1S6C30-4X/V

The Z1S6C30-4X/V check valve is produced by Bosch Rexroth for the Z1S Check Valves series and serves hydraulic automation systems that must block reverse flow in pressure lines. It is a direct-operated check valve, so the poppet responds directly to line pressure without pilot assistance. The sandwich plate design lets the valve be inserted between manifold sections without external piping. Size 6 defines a standardized mounting footprint that matches D03 stack heights. Flow is permitted only from port A1 to port A2, guiding circuit designers on connection orientation. The poppet opens at a cracking pressure of 3 bar, allowing controlled startup without sudden surges. A maximum operating pressure of 350 bar equips the unit for high-pressure machinery, while a maximum flow rate of 40 l/min limits it to medium-capacity circuits. Because the installation position may be any attitude, layout constraints inside compact power units are reduced.

The valve follows the NFPA T3.5.1 R2-2002 D03 interface, enabling direct mounting on American pattern subplates. Its porting pattern of ISO 4401-03-02-0-05 maintains interchangeability with ISO manifolds in global equipment. A cleanliness class of ISO 4406 20/18/15 indicates the fluid must be filtered to protect the seating surfaces from contamination. The approved hydraulic fluid temperature range of −20 to +80 °C allows operation from cold starts up to typical running heat. Compatibility with viscosities from 2.8 to 500 mm²/s accommodates a broad selection of mineral oils and synthetic blends. FKM seals provide chemical resistance and retain elasticity at elevated temperatures, ensuring reliable sealing over the service life. The assembled valve weighs 0.8 kg, so technicians can handle and position it without lifting devices during manifold assembly.