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Ammonia valve

Dateline:2014-11-30 Hits:

Globe valve (stop valve, Globe Valve) opening and closing parts are plug shaped valve, sealing surface flat or cone, the valve seat along the center line of therectilinear motion. Stem form of exercise, (generic name: dark bar), but also lift rotating rod can be used for the control of air, water, steam, all kinds of corrosivemedia, mud, oil, metals and radioactive liquid media and other types of fluid flow.Therefore, this type of cut-off valve is suitable for cutting or regulation and throttle use. Because of the valve stem to open or close the relatively short trip, and havevery reliable cutting off function, and because changes in the valve seat and the valve stroke is proportional, is very suitable for the adjustment of flow

The cut-off valve, also called the door, is one of the most widely used as a valve, the reason why it is popular, because the process of opening and closing the sealing surface friction between the small, more durable, highly open small, easy manufacture, convenient repair, not only for low pressure, but also suitable for high pressure. Valve closure principle, relying on the valve bar pressure, so that the valve seat sealing surface and sealing surface tightly, to prevent media flow. Stop valve can only medium one-way flow, directional installation. The length of the structure is greater than the cut-off valve valve, and fluid resistance, long-term operation, the sealing reliability is not strong

A, use and performance

Pressure rating at room temperature test pressure (Mpa)

Housing sealing seal test

Nominal pressure (Mpa) 1.6 2.4 1.76 1.76

2.5 3.75 2.75 2.75

4 6 4.4 4.4

Application of the temperature of -40~+80 DEG C

Applicable medium ammonia, liquid ammonia, natural gas, liquefied petroleum gas,etc.

Two, the operating principle and structure:

1, the hand wheel clockwise turn, the valve rod to move downwards, the valve flap down so that the sealing surface of sealing, the channel cut off. The downturn is open, the valve rod sealing effect referred to the highest point