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

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Hydraforce directly.***
The Hydraforce UP10-31A-0-N-80-30 (5621401) is a screw-in, cartridge-style remote sequence pilot unloading valve designed for use in accumulator-type hydraulic systems. This model features optional fixed unload/reload pressure ratios of 60%, 70%, or 80%. In its steady state, the valve blocks flow from port 2 to port 3 until a predetermined pressure at port 1 is reached, causing the spool to shift and allow flow between these ports. The valve setting is directly affected by back pressure at port 3 due to the vented spring chamber. If the pressure at port 1 falls below the established reload value, the valve closes, blocking flow again. The UP10-31A-0-N-80-30 offers adjustments that prevent backing out and prohibit springs from going solid, with optional spring ranges up to 207 bar (3000 psi). It boasts a hardened spool and cage for durability and fits industry-common sizes. Pressure ratings include up to 207 bar (3000 psi) for ports 2 and 3, and up to 250 bar (3625 psi) for port 1. The flow rating is set at 3.8 lpm (1 gpm) with maximum internal leakage of just 0.1 ml/min from port 1 to port 2 at maximum pressure. It operates efficiently within a fluid temperature range of -40 to 100 \u00b0C with buna N seals or -26 to 204 \u00b0C with fluorocarbon seals. The product supports mineral-based or synthetic hydraulic fluids with viscosities ranging from 7.4 to 420 cSt and meets a maximum operating contamination level of ISO code 20/18/14. Installation specifications recommend a VC10-3 cavity with cartridge installation torque between 34 and 37 N-m (25 to 27 ft-lb). Seal kits are available under part number SK10-3X-BM, accommodating various seal options.