Yuken relief valve BG-03-32
2 month ago
Product details
Yuken relief valve BG-03-32
1. Product Overview
BG-03-32 is a pilot-operated relief valve manufactured by Japan Yuken. It adopts sub-plate mounting structure and serves as the core pressure protection component of the hydraulic system. This valve can set the maximum working pressure of the circuit, stabilize system pressure during operation, and prevent damage to hydraulic pumps, cylinders, pipelines and other components caused by overpressure. It supports remote pressure adjustment and remote unloading through the vent port. Featuring stable pressure performance, low pressure fluctuation and low running noise, it is widely matched with medium and small flow hydraulic stations. Standard installation dimensions ensure interchangeability for original Yuken spare parts for equipment maintenance.
Yuken BG‑03‑32 is a pilot‑operated pressure‑control Hydraulic valve. It is designed for system over‑pressure protection and pressure stabilization. Matching with the hydraulic pump, it limits maximum working pressure inside the complete hydraulic system. This plate‑mount relief valve is widely equipped on various industrial Machine, available for new equipment assembly, hydraulic station construction and aftermarket component replacement.
Model Code Explanation
- BG: Pilot-operated relief valve series, sub-plate mounting type
- 03: Nominal size (03 specification, medium-small flow)
- 32: Design serial number
2. Main Technical Parameters
Item Specification
Valve Type Pilot Operated Relief Valve
Mounting Method Sub-plate mounting
Max. Working Pressure 25 MPa
Standard Pressure Adjustment Range 0.5 ~ 25 MPa
Recommended Operating Flow 3 ~ 100 L/min
Remote Control Function Available via vent port
Standard Seals NBR nitrile rubber; FKM high-temperature seals optional
Applicable Hydraulic Fluid ISO VG32, VG46, VG68 anti-wear hydraulic oil
Operating Temperature -10℃ ~ +70℃
Weight Approx. 4.1 kg
3. Working Principle
System pressure oil enters the valve body and acts on the lower end of the main spool. Part of the oil flows through the damping orifice to the pilot valve chamber. When system pressure exceeds the preset value, the pilot poppet opens. Pressure difference is generated on both sides of the main spool, pushing the main spool upward. Excess hydraulic oil flows back to the tank, limiting the maximum pressure of the hydraulic system. When system pressure drops below the setting value, the pilot valve and main valve close automatically to maintain stable circuit pressure.
4. Core Advantages
1. Pilot-operated structure, small adjustment torque and stable pressure control.
2. Equipped with remote control port, realizing remote pressure regulation and system unloading.
3. Small pressure deviation under flow variation, suitable for continuous long-time operation.
4. Compact sub-plate installation, convenient layout of integrated hydraulic blocks.
5. High anti-vibration performance, effectively avoiding pressure oscillation in the hydraulic system.
6. Standard universal installation dimension, direct replacement for original valve without modification.
5. Application Range
This relief valve is widely used in the hydraulic system of injection molding machines, hydraulic presses, cutting machines, automated production lines, general-purpose hydraulic power units and other industrial equipment for pressure limiting, overload protection and constant pressure maintenance.
6. Common Faults & Replacement Suggestion
Typical failures: unable to build up system pressure, pressure cannot be adjusted stably, continuous pressure drifting, oil leakage from mounting surface. First check oil cleanliness and adjust the pressure regulating knob; replace the complete valve assembly if internal spool and spring wear occur.
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