The most widely used cut-off valve is a valve, it is the reason why the popular small friction between the sealing surface in the process of opening and closing, more durable, opening height is not easy to manufacture, easy maintenance, applies not only to low pressure, and it applies to high pressure. Using the cut-off valve is installed, should note the following:

A cut-off valve in the open should a leak check, to determine whether the valve is no leakage defects, stuffing box for leakage defects.
2, the operation of valve stem can not be completed manually, you can use a dedicated F wrench instead of F wrench still can not open the case, do not use the extended wrench to force the opening and closing, in order to avoid damage to the valve or the occurrence of security incidents.
Cut-off valve when the applied pressure steam piping, before the opening of the need for condensate removal, after the pipeline steam preheating, preheating pressure was maintained at between 0.2 to 0.3MPA, the purpose of doing so is to avoid temperature , a sudden change in pressure due to seal damage, to determine the steady state can be pressure to the required level.

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