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Valve choose and buy and the note that conduit devises
From;    Author:Stand originally
1. The basis uses place, utility, and understanding concerned code, norms, standard, guiding principle, allowable the valve that fits all sorts of requirements can be chosen already after approbating;

2. Affirm temperature of the working requirement of valve, applicable medium, actuating pressure, medium;

3. The nominal that matchs with conduit photograph certainly opens way: DN(mm) ;

4. Join with conduit photograph certainly means: Flange type, inside (outside) whorl type, solder type, right clip type, type blocking band, chuck type;

5. Decide the mode of operation of valve: The hand is moved, worm wheel is moved, pneumatic, dynamoelectric, fluid is moved, electromagnetism is moved, electro-hydraulic move etc;

6. Affirm the type of valve: A powerful person of a powerful person of brake a powerful person, shut-off valve, throttle, force plunger, ball valve, butterfly a powerful person, diaphragm valve, faucet, check valve, relief valve, drain valve and a powerful person of other special type;

7. Determine the use shape of valve: Switch, adjust model, safety etc;

8. Certain valve housing and inside material: Steel of grey iron, ball iron, carbon, alloy steel, stainless steel, copper alloy, aluminium alloy, plastic wait;

9. Determine the sealed performance demand of valve, sealed grade or sealed leakage rate;

10. Of certain valve defend the coating requirement, requirement that pack, carriage requirement;

11. The valve of special need still should decide: Dimension of height of structural length, valve, exterior, flow resistance, discharge character of ability, discharge, defend the parameter such as function of grade, explosion proof;

12. Decide the installation position of valve and pose.



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