Needle valve principle and characteristics

Material needle valve is generally used by the steel constructed, but there are seals made using a copper alloy valve head. and so. Before using the needle valve. It should open the inspection valve head and seat material. U-turn in order to prevent the use of the process or wear phenomena occur. In the fermentation process, the increased use of Stainless steel needle valve, to ensure strict degree play a role.
Features needle valve is:
(1) withstand high temperatures, high pressure and difficult to corrosion.
(2) Easy to trace the flow rate and flow control plus, dropping feeding.
(3) easy to operate, easy to replace, easy maintenance.