Pilot Operated Safety Valve, API 526, WCB, 3 * 4 IN, CL1500

Key Specifications / Features

The Pilot Operated Safety Valve, meeting API 526 standards, features a robust carbon steel ASTM A216 WCB body, designed for high-performance applications. With a 3 * 4-inch size (DN80 * DN100), it is built to handle pressure class 1500 LB and PN250, ensuring reliable operation in demanding conditions. Its RF flanged ends provide a secure and efficient connection, making it ideal for industries requiring precise pressure relief and safety mechanisms in high-pressure systems.

A pilot-operated safety valve, also known as a pulse-type safety valve, is a pressure relief device that uses the discharge of the medium from the pilot valve to control the operation of the main valve. The pilot valve itself is a standard spring-loaded direct-acting safety valve. As an automatic valve, it plays a crucial role in ensuring personal safety and protecting equipment by preventing excessive pressure in boilers, pressure vessels, and pipelines. Based on the opening height of the valve disc, safety valves can be categorized into micro-opening and full-opening types.

Technical Specifications

» Product model: (K)AX46F(Y)
» Normal Size Range: 1-8 Inch (DN25-DN200)
» Normal Pressure Rating: PN16-PN100, Class 150-600 LB
» Design and Manufacture: GB/T 12243-1989, API RP 520, 521, API 526, API 527
» Face to Face (End to End): GB/T 14087, JB/T 6441, JB/T 2203, JB/T 9624, JB/T 53170
» Flanged Connection: ASME B16.5, DIN 2543-2545, EN 12627
» Test and Inspection: API 598, DIN 3230, MSS SP-117
» Materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex or Other Specials
» Ends Connections: RF Flanged, Groove Flange
» Working Medium: Steam, Air

Product Features

The pilot-operated safety valve is ideal for high-pressure, large-diameter applications. It offers excellent sealing performance and is less affected by back pressure compared to other types. However, its reliability depends on both the main valve and the pilot valve, and its response time may not be as fast or reliable as that of a direct-acting safety valve. Additionally, the valve has a more complex structure.