How to select the right valve?

 

In general, the preferred gate valve. Gate valve in addition to suitable for steam, oil and other media, but also suitable for containing granular solid and viscosity of the medium, and for the valve and low vacuum system. For medium with solids, the gate valve body shall have one or two purge holes. For low temperature medium, should choose low temperature special gate valve.

 

Ball valve selection description

 

Ball valve is suitable for medium of low temperature, high pressure and high viscosity. Most ball valves can be used in media with suspended solids or in powder and granular media depending on the sealing material. Full channel ball valve is not suitable for flow regulation, but it is suitable for occasions requiring quick opening and closing, which is convenient for emergency cutting off in case of accident. In general, it is recommended to use ball valve in the pipeline with strict sealing performance, abrasion, shrinkage channel, quick opening and closing action, high pressure cut-off (big pressure difference), low noise, gasification, small operating torque and small fluid resistance.

 

Ball valve is suitable for light structure, low pressure cut-off, corrosive medium; Ball valve or low temperature, cryogenic medium is the most ideal valve, low temperature medium pipeline system and device, should be selected with a low temperature ball valve cover; When choosing the floating ball valve, its seat material should bear the load of the ball and the working medium. The large diameter ball valve needs greater force in operation. Fixed ball valve is suitable for the occasion of larger caliber and higher pressure. In addition, used in the process of highly toxic materials, combustible media pipeline ball valve, should have a fire, anti-static structure.

 

Selection of butterfly valve
 

Butterfly valve is applicable to the larger diameter (such as DN 600mm) and the length of the structure of the requirements of short, and the need for flow regulation and rapid opening and closing requirements occasions, generally used for temperature ≤80℃, pressure ≤1.0MPa water, oil and compressed air and other media; Because the butterfly valve relative to the gate valve, ball valve pressure loss is relatively large, so the butterfly valve is suitable for pressure loss requirements are not strict piping system.