Steel Valve
Iron Valve
Fittings and Accessaries
ANSI Cast Steel Bellow Seal Gate Valve 150LB
Cast steel bellow seal gate valve is is a high-performance industrial valve engineered for ultra-reliable on/off flow control, specifically designed to eliminate stem leakage—a critical challenge in handling hazardous, toxic, flammable, or valuable media.The metal bellows, welded to the valve bonnet and stem, forms a hermetic barrier between the process media and the atmosphere, preventing leakage even under high pressure, high temperature, and frequent operation.
Key Features
-High-Grade Cast Steel Construction: The requests for CE,Impact test,NACE,Corrosion Allowance,PREN,Pitting test can be met.
-Metal Bellow Seal Design: High-quality metal bellows (Inconel, Hastelloy, or stainless steel) welded via automatic orbital welding, forming a dynamic seal that expands and compresses with stem movement. This design completely eliminates stem packing leakage, a common flaw in traditional gate valves, and protects the valve stem from media corrosion.
-Dual Seal Protection: Equipped with a secondary graphite/PTFE packing seal alongside the bellows seal, providing double insurance for zero leakage—critical for handling hazardous, toxic, or valuable media. The dual-seal design meets international low-emission standards and ensures compliance with strict environmental regulations.
Technical Specifications
-Design Standard:ANSI B16.34
-End Connection: Flanged end (ASME B16.5/EN1092-1),Butt welded end(ASME B16.25)
-Face to Face:ASME B16.10
-Test Standard: API598
-Size:DN15 – DN600 (1/2″ – 24″), with custom sizes available for special large-diameter applications.
-Pressure: 150LB ~1500LB,PN16~PN160
-Body Material: Carbon Steel(WCB/WC6),Stainless steel(CF8/CF8M,etc),Alloy Steel(Monel/Inconel/Hastelloy),etc
-Operation:Hand wheel,Bare shaft with ISO top flange, Electric,Pneumatic,etc
Application
-Operating Temperature: (varies by material and bellows type)
*Carbon Steel : -29℃ ~ 425℃
*Stainless Steel : -46℃ ~ 482℃
-Primary Media: Hazardous chemicals, toxic gases, flammable liquids, valuable media, high-temperature steam, crude oil, natural gas, LPG/LNG, vacuum systems, corrosive fluids, and pharmaceutical-grade media—all requiring zero leakage and strict environmental control.
-Applicable Scenarios: Petroleum refineries, petrochemical plants, pharmaceutical factories, nuclear power plants, LPG/LNG storage and transmission systems, chemical processing plants, food and beverage industries, vacuum services, and offshore oil/gas platforms. Particularly suitable for small-bore, high-pressure piping systems where leakage prevention is critical.
