• Categories:Industry dynamic
• Author:Lisa
• Origin:
• Time of issue:2023-01-12
• Views:0

(Summary description)Explosion-proof F wrenches have various names, some of which are valve wrenches, cocker wrenches, valve hooks, valve F wrenches, etc. They are mainly used to open and close various manual valves, generally divided into two types: anti-slip F wrenches and ordinary F wrenches. Its use features: convenient, light and versatile. The following points must be paid attention to when the explosion-proof F wrench is used to open and close the valve: A. Before the operation of the explosion-proof F wrench, the appropriate F hook wrench should be selected according to the regulations for the valves of different sizes. It is strictly prohibited to use an extension lever or a long wrench to pull the small size valve, because the design of the manual valve is mainly designed by ordinary manpower, The strength of the valve sealing surface and the closing force of the valve should be considered before operation. B. The opening and closing of the valve should be steady, and the force should not be strong or fast, especially the closing and opening of some high-pressure valves. C. When opening the steam valve, attention should also be paid: first, heat the steam valve in advance before opening, and drain the condensate. When opening, attention should also be paid to the need to use the F wrench to slowly open it to avoid water hammer. D. After all the valves are opened, use the F wrench to turn the handwheel a little to tighten the threads to avoid loosening and damage. E. For rising stem valves, remember the position of the valve rod when opening and closing. It is strictly prohibited to hit the dead center at the beginning of the whole process, and pay attention to check whether it is false closed when it is fully closed. F. When the pipeline is used in the initial stage, due to the large amount of dirt, or when the normally open valve is contaminated with dirt, the operator should use the valve hook to slowly open the valve, which is also slightly open, and use the high speed flow of the medium to wash away the dirt, then gently close it, then open it again, and repeat it for many times. G. When using explosion-proof F wrench to operate, if it is found that it is too laborious, immediately analyze the cause, and do not be reckless.