The A48Y spring safety valve is a high-performance full-opening safety valve that integrates large-capacity discharge, carbide sealing, and manual testing functions. The valve is equipped with a manual testing wrench, allowing for regular forced opening tests on the valve disc to verify the reliability of its operating mechanism. It adopts a "Y"-shaped carbide seal to ensure long-term tight sealing under high temperature, high pressure, and harsh media conditions. When the system experiences overpressure, the valve disc quickly opens fully to achieve rapid discharge of large flow, and automatically closes after pressure recovery, providing reliable and verifiable overpressure protection for critical industrial systems. It is mainly used in key applications where strict requirements are placed on the sealing, discharge capacity, and reliability of safety valves, such as power station boiler main steam systems, petrochemical high-temperature and high-pressure reaction equipment, large pressure vessels, and industrial steam main pipelines. It is particularly suitable for industrial devices that require regular functional verification to ensure long-term safe standby.

A48H Spring-Loaded Safety Valve Product Diagram

Features:

1. Manual test wrench

A wrench is provided on the top of the valve, allowing for regular manual lifting tests. This enables inspection of the valve disc's flexibility of movement without requiring system pressure increase, serving as a crucial function in preventive maintenance.

2. Spring micro-opening structure

Utilizing a direct-loaded spring and a micro-opening valve disc, it features a small opening height, moderate discharge capacity, and rapid and smooth opening and closing actions. It is suitable for applications involving liquids or where small discharge capacity pressure relief is required.

3. Alloy steel hard seal (Type "H")

The sealing surface between the valve disc and the valve seat is made of alloy steel (such as 13Cr) through build-up welding, which features high hardness, wear resistance, high temperature resistance, reliable sealing performance, and long service life.

4. Compact structure, adjustable pressure

The overall design is compact. By adjusting the screw, the spring preload can be adjusted within a certain range, thus precisely setting the opening pressure (set pressure).

5. Wide applicability and high reliability

Suitable for various media such as saturated steam, air, water, and oil products with operating temperatures up to 300℃. Regular wrench testing greatly enhances the reliability of the valve for long-term standby use.