UP10-31A-0-N-80-30/M207 CARTRIDGE

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The Hydraforce UP10-31A-0-N-80-30/M207 (5621401.M207) is a screw-in, cartridge-style remote sequence pilot unloading valve designed for accumulator type hydraulic systems. This valve features optional fixed unload/reload pressure ratios of 60%, 70%, or 80%. In its default state, it blocks flow from port 2 to port 3 and allows flow when a predetermined pressure is reached at port 1. The valve automatically closes if the pressure at port 1 falls below the set reload value. It has a hardened spool and cage for enhanced durability and supports optional spring ranges up to 207 bar (3000 psi). The valve operates effectively within a fluid temperature range of -40 to 100\u00b0C with Buna N seals, and -26 to 204\u00b0C with fluorocarbon seals. It supports mineral-based or synthetic hydraulic fluids with lubricating properties, maintaining optimal performance within a fluid viscosity range of 7.4 to 420 cSt. With a maximum operating contamination level of ISO 4406:20/18/14, this unit ensures high reliability in demanding conditions. The UP10-31A-0-N-80-30/M207 has an internal wetted surface area of either 166 cm\u00b2 or 187 cm\u00b2 depending on the variant, and fits into VC10-3 cavities requiring installation torque between 34 to 37 N-m. Its compact design includes no orientation restrictions during installation. Maximum internal leakage is rated at just 0.1 ml/min from port 1 to port 2 under maximum pressure conditions, ensuring efficient operation with minimal loss.