How to Select and Order The Correct Valve

How to Specify and Order the Correct Values?
State quantity,figure number and size for each valve you wish to order.
See individual valve catalog pages and web for specific or special product designations.
This web has been published to assist you in choosing the correct valve for a vast number of piping conditions.
Care should be taken to select themost suitable valves for your service.
Exact specification of each valve should be made to avoid possible ambiguity.
When requesting quotations and ordering the product a fully adequate description should be made.
Please state the following information when ordering a valve in order to avoid unnecessary delays and to insure we supply you with the valve you have requested.
1. Valve size
2. Pressure boundary material-metallurgy of the castings and components.
3. Type of valve: Ball valve,Manifold,Gate,Globe,Check,Bibcock,Angle,Fitting etc.
4. End connection including wall thickness of connecting pipe if weld end and any special flange facings or finishes.
5. Any material deviations from standard-packing, gasket,bolting, etc.
6. Any accessories-acid shield,locking devices,chain operation,etc.
7. Manual or power actuators,please include details of requirements
8. For convenience in ordering,specify by fiqure number and quantity.
Valve Size Nominal size of the pipeline into which the valve will be placed must be determined.
Valve Material The following facts should be considered in determining the correct valve material:
1.the medium or media which will be controlled
2.the temperature range of the line medium (media)
3.the pressure range to which the valve will be subjected
4.possible atmospheric conditions which may affect the valve
5.possible extraordinary stresses to which the valve will be subjected standards and piping codes which must be met
Type of Valve The Control function of the each valve configuration has been developed to perform certain control functions. Do not expect one type of valve to perform all the valving jobs in a system.
Pressure-Temperature Ratings  Please pay careful attention that the pressure-temperature ratings of a particular valve are in keeping with the |requirements of the service.Pay especially careful attention to the packing and gasket materials as this may |limit the rating as is the case with PTFE used as thestandard in WORLD valves. Specify alternative packing and gasket materials as necessary to meet or exceed your service requirements.
Valve and Connections Considerations as to pipeline integrity,future maintenance,corrosion factors,field assembly,weight and safety should be given in determining the method of connecting the valve in the pipeline.
Method of Operation The means by which the valve is operated assupplied are shown for the valves in this web.
Yuhuan Xindun Machinery Co., Ltd.
To the best of our knowledge the information contained in this publication is accurate.
However,we does not assume any liability whatsoever for the accuracy or completeness of such information.