hp-Technik Bypass valve B-GHG-E/2 2210005

This bypass oil valve is installed in the oil circuit between the pump and nozzle assembly, diverting excess fuel back to the tank or pump inlet to stabilize pressure. It handles flows from 300 to 6000 l/h, pressures up to 9 bar, temperatures up to 150 °C, viscosity up to 450 mm2/sec. Ambient range is -10 to +90 °C, storage -10 to +60 °C. It is suitable for single-pipe systems requiring recirculation.

For this type of valve, verify the hydraulic configuration (single-pipe or two-pipe), required capacity and pressure range. The connection threads and shaft orientation must match the mounting pattern on the pump body. Before ordering, compare opening pressure and flow characteristics with pump output and nozzle rating. Also check that the valve's pressure adjustment range (via screw and spring selection) suits the system.

Common failure modes include leaking seals, blocked bypass ports, or a stuck regulating piston. This causes unstable firing rates, poor cut-off, or pump cavitation. Check seals and ports for blockage and ensure the piston moves freely.