Multi Layer Bellows. Double, triple and quadruple bellows wall depending on the size of the valve. It is welded to the stem and not to the disc, preventing the transmission of vibrations and extending the life of the bellows.
Tongued and grooved body and bonnet
Conical Plug. Lower contact surface between plug and seat enhances a tighter clousure.
Standard seat and plug hardfaced 13% Cr. overlay 150# and 300# Trim 5 standard estillited in 600# Stellited plug and seat
With Robust Yoke design
Non Ejectable Stem. Stem includes mechanical stop which at the same time perform the function of locking metal to metal in the opened positions and hence prevent stems from being ejected due to process pressures. Meanwhile, mechanical stop adds robustness when valves are opened. Furthermore, our valves are equipped with pure graphite safety packings.
Standard Free Rotating Plug 360º free rotation disc, allowing the cleaning of impurities that may carry the fluid. Besides, closure surface is different in every cycle and at the same time, it does not transmit the vibrations to the valve stem and the bellows.
Specification
Size range: NPS 1/2 to NPS 12
Interface Standard: Convex serrated flange ends in accordance with ASME B 16.5
Pressure class: Class 150 to Class 600
Temperature range: -29ºC to 427ºC
Material:Carbon steel
Applications
ANSI Series Bellows Shutoff Valves is suitable for use in industries such as petrochemicals, chemicals, refineries, power plants, and steel plants etc... Bellows sealed valves originally born to control toxic and dangerous media, like ethylene dioxide, HTF (High Pressure Thermal Oil), low concentration sulphuric acid, etc.
BVALVE has optimized the design of all internal parts such as plug, bellows, stem, etc., which effectively improves the sealing performance and operability of the valve, improves safety, and achieves maintenance-free. At the same time, it also ensures the economy of the valve, and has a very high price.
