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What is Bellow Seal Globe Valve?

A Bellows Valve is a specially designed valve suitable for use in industries dealing with a hazardous medium where even minute leakages can be extremely critical. With the exponential growth of new industries such as the chemical and nuclear industries, there is a growing abundance of flammable, hazardous, extremely poisonous, and toxic media flowing through the pipelines. This creates a high risk of leakage, explosion, and health hazards. So, the valves used in such pipes and systems have specific stringent leakage and sealing requirements.

The need for a completely different approach required for the desired sealing & redundancy has led to the development of Bellow seal globe Valves.

Features of Bellow Seal Globe Valve

• • Long cycle life bellows (10,000 cycles): Designed and qualification tested for high pressure/temperature applications.

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

• • Two secondary stem seals: a) Backseat in an open position; b) Graphite packing.

• • Superior seating faces: Seats hard faced with CoCr alloy, and the disc is solid CoCr alloy.

Technical Specifications of Bellow Seal Globe Valve

TYPE OF DISC	Plug Needle Swivel Regulating Disc
CONSTRUCTION	Bolted Welded Extended Pressure Seal Bonnet
PATTERN	Straight Angle Y-type
END CONNECTIONS	Flanged BW SW THR
OPTIONS	Extended Bonnet Bellow Sealed Heating Jacket Screw-Down/Non-Return
OPERATED	Handwheel Actuator Operated Bare Stem
BELLOW SEAL MATERIALS	304 321 316Ti Alloy 625 C276
DESIGN & TESTING	All available international standards according to API, EN, ISO Fire safe design
SIZE & BORE	ANSI 1/4 – 16” DN 6 – DN 400
PRESSURE RANGE	ANSI 125 – 4,500 lbs. DIN PN 10 – PN 400

Applications of Bellows Seal Globe Valve

Bellow sealed globe valves can be deployed for a wide variety of applications in the oil & gas and petrochemical industries when high quality, reliable valves are required. A few example applications include:

• • High-temperature services

• • High-cycle and switching services

• • Emergency shutdown valves

• • High-integrity pressure protection system

• • High-pressure oxygen, nitrogen, or hydrogen

• • Solids handling (powders, fines, dust, and catalysts)

• • Polyethylene or polypropylene

• • Coal conversion, and gasification

• • Thermal fluids

• • Separator, filter, and drying systems

• • Compressor stations

• • On/off isolation service

• • Oil & gas manifolds