Multifunctional water pump control pneumatic valve technical requirements 1)

this standard applies to the nominal pressure PN. MPa - PN。 MPa, nominal diameter DNmm - DNmm pneumatic valve of multi-function water pump control.
now the standard technical requirements is introduced as follows:
- pressure Temperature degree level
multifunctional water pump control pneumatic valve pressure Sure - temperature level From the shell, the internal control of material parts management system and pressure temperature rating. Multifunctional water pump in the maximum allowable working pressure and temperature control pneumatic valve shell, internal control of material parts management system and the temperature of the maximum allowable working pressure is small.
pressure shell - of iron Temperature rating shall comply with GB/T. The provisions of the.
steel casing pressure Temperature rating shall comply with the provisions of GB/T.
for GB/T. Provision of the pressure, GB/T - Temperature rating of materials, in accordance with the relevant standards or design requirements. Body


the whole body should be cast flange at the flange. The type and size of iron flange should comply with GB/T. The provisions of the technical conditions should comply with GB/T. The provisions of the; Steel flange type and size should comply with GB/T. Rules and technical conditions should comply with the provisions of GB/T.

the minimum wall thickness body cast iron pneumatic valve body of the minimum wall thickness shall comply with the GB/T - table The minimum wall thickness, steel casting body should comply with JB/T - The provisions of the schedule of the consistent.

pneumatic diaphragm valve cover seat by the pneumatic valve cover and the diaphragm, diaphragm with pneumatic valve flange connection type should be used.
and pneumatic diaphragm seat number of connecting bolts shall be not less than less.
pneumatic valve cover and the minimum wall thickness according to the diaphragm. Requirements.
pneumatic valve cover and diaphragm flange should be circular. Flange seal face type, can be flat, surface type or concave and convex type.
pneumatic valve stem, slow breath valve plate, the main pneumatic valve plate
slow breath pneumatic valve stem should connect fastening plate, reliable.
slow breath pneumatic valve plate and the main valve plate sealed metal seal type should be used.
main sliding pneumatic valve plate and valve stem must be flexible and reliable.
the main plate pneumatic valve and the main pneumatic valve plate seal sealing metal and nonmetal seal can be two types.

of diaphragm membrane performance should comply with the table ( See page 2) Requirements.
must look with the diaphragm HG/T request.
when applied to drinking water, membrane materials should comply with the safety requirements of GB/T is the same.

control tube system control pipe system should be able to withstand the maximum working pressure of pneumatic valves, various components of each section shall not leak.

materials should be adopted by the material of the main component of JB/T requirement.
copper alloy castings shall comply with the provisions of GB/T; Gray cast iron castings shall conform to the requirements of GB/T, in not less than the tensile strength of MPa; Ductile iron castings shall comply with the provisions of GB/T; Carbon steel castings shall conform to the requirements of the gb/T; Austenitic steel castings shall comply with the provisions of GB/T.
the appearance of the multifunctional water pump control pneumatic valve steel casting quality shall comply with the provisions of the JB/T multifunctional water pump control pneumatic valve cast light JB/T request, the appearance of the iron quality.

shell strength of multifunctional water pump control pneumatic valve shell strength should comply with the provisions of GB/T.

seal performance of multifunctional water pump control pneumatic valve sealing performance shall comply with the provisions of GB/T. Cleanness of

the purity of the multifunctional water pump control pneumatic valve shall comply with the requirements of JB/T.

when applied to drinking water, multi-function water pump control pneumatic valve lumen coating material should comply with the safety requirements of GB/T is the same. The surface coating, are provided in the special requirements of the contract.