Brief introduction of Stop Valves

Stop valves are styles of forced made valves, therefore, as soon as close your valves, you have to put out pressure for you to valve clack, in order to avoid the flow of wrapping up side. In the past, when medium get into stop valves over the bottom connected with valve clack, a resistance which in turn operating drive need to get over is the pushed caused by chaffing of valve rod as well as padding as well as pressure, the particular force in which close the particular valve is larger than open it up, so the height of valve rod of stop valves needs to be significant, or the dysfunction of Come bending will certainly occured.

Lately, since the made valve can be appeared, your medium pass direction associated with stop valves is switch the signal from getting into control device through over of device clack. At that time, in the effect involving medium, this force regarding close the valve is small, when operated the valve needs greater force, so the diameter involving valve rods can lowered accordingly. Simultaneously, under the function of medium tension, this kind of device is relatively limited. In one regarding standards individuals country's control device, there is a principle that the circulation direction associated with stop valves applies the sort of "up -down".

When the stop valves will be opened, a lift connected with valve clack will be 25% ~ 30% of small diameter, your flow features reached to help maximum, which usually represented that this valve has got reached to be able to full opened up. Therefore, the venue of complete opened of stop valve should be made the decision by valve clack.