BG – Bstind Hydraulic Valves

BSTIND BG series pilot operated relief valves are engineered for precise pressure control in hydraulic systems requiring stable, reliable overpressure protection. Designed as a direct functional equivalent to Yuken BG series, they ensure full interchangeability with industry-standard mounting and performance characteristics.

Whether you are replacing bg 03 yuken or bg 06 yuken, upgrading an existing system, or sourcing a cost-effective alternative to OEM valves, BSTIND delivers consistent hydraulic performance with competitive supply advantages.

What is a Pilot Operated Relief Valve BG?

A Pilot Operated Relief Valve BG refers to a type of hydraulic pressure control valve designed to limit system pressure in high-flow hydraulic circuits using a two-stage (pilot + main stage) control structure. In simple terms, it is a valve that:

Keeps hydraulic system pressure within a safe limit
Opens only when pressure exceeds a preset value
Handles large flow rates with stable and precise pressure control

BG Pilot Operated Relief Valve Working Principle

A BG pilot operated relief valve works on a two-stage hydraulic pressure control principle. It is designed to maintain system pressure within a preset limit by combining a small pilot control stage with a main flow relief stage.

Uses a pilot + main valve two-stage structure to control pressure
Pilot valve detects system pressure and triggers opening
Main valve opens only when pilot reduces control pressure
Excess hydraulic oil is released to tank to limit pressure
System pressure is automatically stabilized and reset after relief

BG Pilot Operated Relief Valve

The valves can protect hydraulic system of excessive pressure,and can be used to maintain constant pressure in hydraulic system. Remote control and unloading are premitted by vent circuit.

Product Features

1, Protecting pump and control valve can avoid over-pressure, and making hydraulic system to keep constant pressure;
2, Take use of unloading (remote control) port can controlled valve unloading remotely;
3, Take use of pilot,with big flow and low noise.