CV42-M20-0-N-30 CHECK VALVE

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The Hydraforce CV42-M20-0-N-30 (5204102) is a screw-in, cartridge-style hydraulic check valve designed primarily for use as a blocking or load-holding device in fluid power systems. This model facilitates flow from port 1 to port 2 while normally blocking it in the opposite direction. The valve features a fully guided poppet, which remains spring-biased closed until sufficient pressure at port 1 compels it to open towards port 2. Key specifications include a hardened seat that ensures long life and minimal leakage, and optional bias springs that enhance backpressure application flexibility. The CV42-M20-0-N-30 operates effectively within a pressure rating of up to 241 bar (3500 psi) and accommodates a wide range of operating temperatures depending on the seal material used: from -40 to +100°C with Buna N seals, -26 to +204°C with Fluorocarbon seals, and -54 to +107°C with Polyurethane and Urethane seals. It supports mineral-based or synthetic hydraulic fluids with lubricating properties within a viscosity range of 7.4 to 420 cSt. Designed for ISO 7789 cavities, this valve model can be installed without orientation restrictions and requires an installation torque between 149 to 176 Nm (110 to 130 ft-lb). For maintenance or repairs, various seal kits are available including Buna N (SK42M2NT), Fluorocarbon (SK42M2VT), Polyurethane (SK42M2PT), and Urethane (SK42M2UO). Each kit comes with installation instructions ensuring proper maintenance practices are followed. The valve's robust design also includes corrosion protection capable of withstanding up to 960 hours of salt spray per ASTM B117 standards, making it a reliable choice for demanding hydraulic applications.