Water seal brake characteristics and application of pneumatic valve

water seal brake pressure pneumatic valve is suitable for the work. ~。 MPa, working temperature ~ ℃ fire power station backwater condensation system and on petroleum, chemical industry requirements and atmosphere insulated pipeline, cut off or connect medium, applicable medium: water, oil, steam and non-corrosive gases.
a, characteristics and use
and S/Z series of opening and closing flexible, fast, reliable sealing, usually adopt double ram two-way elastic seal;
and reasonable product structure is simple, compact, easy maintenance, long service life;
and in the pipeline for opening and closing device, must be in full open or full close status, shall not be used to adjust flow;
and pneumatic valve flange and welding machine has two connection way, drive mode for manual and electric and complicated structure.
pneumatic valves according to the sealing surface can be divided into the wedge disc brake pneumatic valve, pneumatic valve and parallel disc brake wedge disc brake pneumatic valve gate type single, double disc and flexible disc.
parallel disc brake pneumatic valve can be divided into single ram and double ram.
the threads of the pneumatic valve stem position, can be divided into pneumatic rising stem gate valves and pneumatic non-rising stem gate valve two kinds.
2, pneumatic water seal gate valve design and manufacturing standards
the design and manufacturing: GB
flange dimensions: GB, JB,
pressure temperature: JB/T GB
length: GB/T
inspection and test: GB, JB/T

3, the main performance specification nominal pressure ( MPa）
shell strength test. 。 。 。 。 。
sealing test. 。 。 。 。 。
on sealing test. 。 。 。 。 。
gas seal test. 。 。 。 。 。

application scope product type is used for temperature ( ℃) Applicable medium
type carbon steel water, steam, oil, non - corrosive gas or less alloy type

or less four, the major parts material type parts name

products pneumatic valve, pneumatic valve cover, support stem disc, pneumatic valve, sealing surface pneumatic valve seat sealing surface
stem nut filler alloy steel ( I） WCB CrMol CrMoVA carbide cobalt base alloy aluminum bronze flexible graphite
type carbon steel ( C) WCB Cr or Cr Cr stainless steel or hard alloy stainless steel aluminum bronze flexible graphite

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