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Part specifications of bellows valves——HERO VALVE

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Issuing time:2020-04-10 00:00Author:HERO VALVESource:www.hero-valve.com

Bellows valve connection: flange, welding, internal thread.


Transmission mode: manual [DN15-DN300]


Working pressure: [PN1.6≈PN4.0], [125LB≈300LB].


Medium temperature: -40 ℃ ≈500 ℃.


Fluid medium: water, steam, hot oil, oil, gas, corrosive medium, etc.


Body material: carbon steel, stainless steel.


Sealing material: stainless steel disc, stainless steel bellows, double seal.


Filler: Flexible graphite.


Bellows stem material: stainless steel 304, stainless steel 316, stainless steel 2cr13.


Valve body surface: cast steel: matt purple, stainless steel: natural




Normally closed state: The valve flap is hard sealed on the valve seat convex, forming a hard seal, completely static seal;


Pilot state: due to the larger opening and closing resistance of the globe valve with a diameter greater than DN200, the pilot type is used for opening, that is, first opening, the pilot closing pressure relief, the inlet pressure is reduced, the inlet and outlet pressure balance is achieved, the valve is opened, and the valve is closed when closed Small torque


Open state: The double flaps are fully opened, and the overall valve is in a fully vented state. The resistance of the fluid in the valve is less, which shortens the venting time and improves the venting effect of the bellows valve.

——HERO VALVE

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