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ANSI bellows seal globe Valve

date:[2015-11-28]    Click: ANSI bellows seal globe Valve

API Bellows globe valve

Bellows Seald globe Valves are zero emission and maintenance free. An uninterrupted metallic barrier is positioned between the piping and the environment. The components that during valve operation are subject to relative movements are welded onto the extremities of a metallic bellows that absorbs and compensates the shifting. Hence these valves are suitable for any fluid and are recommended when zero emission characteristics are required to protect the environment and the health of the workers from pollutive leaks, to prevent expensive wastes due to loss of energy and fluid, and to eliminate the not negligible cost of replacement of the packing. In conclusion, the valves are particularly suitable for dangerous, inflammable,lethal and explosive media.

Application:Industry, Powerstations, Flue gas purification plant, processing technology, gas supply,vapour facilities, recycling facilities, vacuum facilities, hot water, heating technology,district heating, thermal oil applications, general plant manufacturing, etc. (other applications on request)

Medium :Steam, gases, hot water, thermal fluids, hot oil, process water, vacuum facilities, ammonia etc.(other flow media on request)

Materials :WCB, WC6,SS304,SS316

Bellows materials: SS304, SS316,SS316L,SS310, Hastelly C.

Size range :2"-16"

Class: 150LB-600LB

Temperature :≤425 ℃

Fig No. :WJ3104

Technical specification:

●Design Standard: API600 / BS1873

●Face To Face: ANSI B16.10

●Flange ends: ANSI B16.5

●Test & Inspection: API 598

Features and benefits

● Long cycle life bellows (3000 cycles) in Gr. 321 (stainless), Inconel for special applications, or Hastelloy C for chlorine service.

● Bolted body-bonnet joints for fast serviceability. Fully enclosed spiral wound Gr. 316 (stainless) graphite gaskets.

● Non-rotating stem prevents torsion of bellows.

● Two-secondary stem seals: a) Back seat in open position; b) Graphite packing.

● Bellows monitoring port (optional): A plug can be connected to the space above the bellows to monitor performance.

● Seat and disc hardfaced with CoCr alloy, ground and lapped.