Hoisting speed of the product valve is open or close the valve to complete a movement to represent the time required. Valves open and close speeds generally no strict requirements, but some conditions the speed of the hoist have special requirements, if any, the prompt to open or closed, to prevent an accident, and some require slow and shut down to prevent the resulting water hammer, etc. , Teyou Yongjia Machinery Co., Ltd. Valve testing equipment for the pilot valve pressure test when special consideration, and get a user account.