Balanced Bellows Safety Valve, API 526, WCB, DN50, PN16

Key Specifications / Features

This Balanced Bellows Safety Valve, designed to API 526 standards, is made from carbon steel ASTM A216 WCB for enhanced durability. With a 2-inch size (DN50), Class 400 LB pressure rating, and PN64 compatibility, it is suitable for high-pressure applications. The valve features groove flange ends for secure installation and reliable sealing.

The Bellows Balance Safety Valve is designed for systems where the discharge is relatively straightforward. The pressure in the discharge system can be atmospheric, constant, or may build up to a maximum of 10% of the set pressure. When a constant back pressure is present, the valve should be set at the differential pressure. The valve disc's sealing surface comes in two types: flat and conical. The discharge area is calculated based on the cylindrical or conical surface formed between the valve disc and valve seat. This valve is suitable for applications with small discharge capacity, high back pressure, and stable system pressure.

Technical Specification

» Size Range: 1/2-16 Inch (DN15-DN400)
» Pressure Rating: Class 150-600 LB (PN10-PN100)
» Design and Manufacture Standards: 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 Connections: ASME B16.5, DIN 2543-2545, EN 12627
» Test and Inspection Standards: API 598, DIN 3230, MSS SP-117
» Materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex, or Other Special Materials
» End Connections: Flanged (FF, RF, RTJ) to International Standards

Product Features

» Lighter and More Compact Construction: Continuous design improvements have resulted in smaller and lighter valves, aligning with industry trends for space and weight savings.
» Interchangeable Parts: The valve can be easily modified from one type to another—gas, liquid, conventional, or bellows—by changing just a few parts.
» Simplified Maintenance and Service: Re-engineering has reduced the number of parts, making maintenance easier and more cost-effective.
» Material Selection: A wide range of materials are available, including non-ferrous materials for low-temperature and oxygen service, as well as exotic alloys for use in chemical and process industries.

Main Parts and Materials