.png)
Shida Komusho AV-31 Japanese Safety Valve for Compressed Air Systems
- Luis Alberto Fing
- Aug 31
- 2 min read
Nichiboku's industrial Insights
Introduction
Industrial compressed-air systems require dependable overpressure protection to safeguard compressors, air receivers, piping, pneumatic machinery, and connected equipment.
The Shida Komusho AV-31 Japanese safety valve for compressed air systems provides automatic pressure relief when system pressure reaches a predetermined set point. Its compact Rc 3/4 × Rc 3/4 threaded configuration supports installation in defined industrial air applications and replacement projects.
Reliable Industrial Pressure Protection
Abnormal pressure can result from compressor-control failure, blocked piping, incorrect pressure regulation, or process disturbances.
The AV-31 safety valve is designed to discharge compressed air when the established set pressure is reached. Once pressure decreases to the specified closing level, the valve reseats to support stable system operation.
Correct selection must consider more than the connection size. Set pressure, required discharge capacity, operating temperature, back pressure, materials, and applicable regulations must all be verified.
Reference Technical Specifications
The following values correspond to a defined reference configuration and should not be interpreted as universal specifications for every AV-31 valve.
Parameter | Reference Specification |
Manufacturer | Shida Komusho |
Model | AV-31 |
Fluid | Air |
Inlet Connection | Rc 3/4 |
Outlet Connection | Rc 3/4 |
Set Pressure | 3.8 MPa |
Closing Pressure | 3.23 MPa |
Design Pressure | 4.0 MPa |
Design Temperature | 50°C |
Reference Capacity | 3,751 kg/h |
Back Pressure | 0 MPa |
Hydrostatic Test Pressure — Inlet | 6.0 MPa |
Pneumatic Test Pressure — Inlet | 4.0 MPa |
Seat-Tightness Test Pressure | 3.42 MPa |
Final specifications must be confirmed according to the required model, operating conditions, discharge capacity, inspection scope, and controlled manufacturer documentation.
Industrial Applications: Shida Komusho AV-31 Safety Valve
The Shida Komusho AV-31 may be evaluated for:
Compressed-air distribution systems
Air compressors and receiver tanks
Pneumatic machinery and automation lines
Industrial manufacturing equipment
Utility-air and process-air systems
Maintenance and replacement projects
Actual suitability depends on the protected equipment, fluid, pressure, temperature, required capacity, piping arrangement, and applicable safety requirements.
Information Required for Selection
For technical evaluation or replacement, provide:
Existing manufacturer and complete model
Valve nameplate and equipment photographs
Fluid and operating temperature
Normal, design, and required set pressure
Required pressure-relief capacity
Inlet and outlet connection details
Expected back pressure
Material requirements
Applicable standards and certificates
Required quantity
A valve with the same 3/4 × 3/4 connection should not automatically be considered interchangeable. Internal flow area, pressure setting, discharge capacity, materials, and testing requirements must also be verified.
International Sourcing from Japan
Nichiboku supports international end users, maintenance departments, engineering contractors, and industrial procurement teams requiring Shida Komusho safety valves for defined applications.
Support includes product identification, technical coordination, manufacturer quotation management, inspection-document coordination, export documentation, and international supply from Japan.
Shida Komusho product information:
Japanese Industrial Products
Review Nichiboku’s virtual catalogue of Japanese industrial equipment and components for plant maintenance, equipment replacement, and defined industrial projects worldwide.
Comments