Multifunctional Pump Control Valve technical requirements

The standard applies to nominal pressure for PN1.0MPa-PN4.0MPa, nominal diameter of DN50mm-DN1200mm multifunctional pump control valve.



Now the standard technical requirements described below:



1 Pressure - temperature degree-level



Multifunctional Pump Control Valve Pressure - temperature rating from the shell, inner parts and control of materials management system, the pressure - temperature rating determined. Multifunctional Pump Control Valve at a temperature of the maximum allowable working pressure to take the shell, internal parts and control tube system materials in the temperature value of the maximum allowable working pressure in the small value.



1.1 The iron shell pressure - temperature rating should be consistent with GB/T17241.7 requirements.



1.2 steel shell of the pressure - temperature rating should be consistent with GB/T9124 requirements.



1.3 For the GB/T17241.7, GB/T9124 does not provide the pressure - temperature rating of the material, according to the relevant standards or design requirements.



2 Body



2.1 Body Flange



Flange shall be cast with the body as a whole. Iron flange type and dimensions should be consistent with the provisions of GB/T17241.6 technical conditions should be consistent GB/T17241.7 requirements; steel flange type and dimensions should be consistent with the provisions of GB/T9113.1 and technological conditions should be consistent with GB/T9124 requirements.



2.2 The length of the valve structure.



2.3 The minimum wall thickness of valve



The minimum wall thickness of cast iron valve body GB/T13932-1992 Table 3 should be consistent with the provisions of the minimum wall thickness of steel body parts should be consistent with the provisions of JB/T8937-1999 Table 1.



3 piece tectorial membrane valve seat



3.1 valve cover and the diaphragm seat, diaphragm valve seat and the connection type should be used flange.



3.2 diaphragm and valve seat shall not be less than the number of connecting bolts 4.



3.3 valve cover and the diaphragm seat a minimum wall thickness according to the requirements of 2.3.



3.4 valve cover flange and the diaphragm seat should be rounded. Flange sealing surface of the planar pattern can be used, sudden surface-type or concave-convex type.



4 Stem, slow-closing valve plate, the main valve plate | MechNet | welcome to visit the China National Machinery network of experts www.MechNet.com.cn



4.1 slow-closing valve plate and valve stem should be connected fastening and reliable.



4.2 slow-closing valve plate with the main valve plate sealing type metal seal pattern should be used.



4.3 The main valve plate and valve stem must slide a flexible and reliable.



4.4 the main valve plate and the main valve seat seal plate can be used two kinds of metal sealing and non-metallic sealing type.



5 Diaphragm



5.1 patch performance should conform to Table 2 (see next page) requirements. | MechNet | welcome to visit the China National Machinery network of experts www.MechNet.com.cn



5.2 Diaphragm appearance quality should be consistent with HG/T3090 requirements.



5.3 when applied to drinking water, the diaphragm material should be consistent with GB/T17219 security requirements.



6 Control Management Information System



Control systems control the various components should be able to withstand the maximum working pressure valve, the parts can not leak.



7 Materials



7.1 The main parts of the selection of appropriate materials, according to JB/T5300 requirements.



7.2 Copper alloy castings shall comply with the provisions of GB/T12225; GB/T12226 gray iron castings shall comply with the provisions of its tensile strength shall be not less than 200MPa; ductile iron castings shall comply with the provisions of GB/T12227; carbon steel castings shall comply with GB/T12229 requirements; GB/T12230 austenitic steel castings shall comply with requirements.



7.3 Multifunctional Pump Control Valve Steel Casting JB/T7927 appearance quality should meet the provisions of multifunctional pump control valve cast iron appearance quality reference JB/T7927 requirements.



8 shell strength



Multifunctional Pump Control Valve shell strength should be consistent with GB/T13927 requirements.



9 sealing performance



Multifunctional pump control valve sealing performance should be consistent with GB/T13927 requirements.



10 Cleanliness



Multifunctional Pump Control Valve JB/T7748 cleanliness should meet the requirements.



11 Painting



When applied to drinking water, the multifunctional pump control valve cavity coating material should be consistent with GB/T17219 security requirements. Outer surface of the coating is not provided for, the special requirements specified in the order in the contract. ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve Three way ball valve V Type Ball Valve
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