Master these points to easily distinguish non-rising stem gate and rising stem gate valves. Non-rising stem gate valve is a gate can only do full open or full close, not regulate the function of the fluid, the most common of which are very good wedge gate Industrial Valves sealing. So, when should choose a non-rising stem gate valve? Non-rising stem and what is the difference between rising stem gate valves? One, the working principle of the different non-rising stem gate valve opening and closing, the steering wheel and stem is relatively static, not occur relatively transmission, non-rising stem gate valve opening and closing is made up of stem in fixed point rotation to drive the valve opening and closing, to keep the valve fully open or close state. And rising stem gate valve opening and closing is made from the stem and the steering wheel relative to transmission, so as to lift the disc, the Industrial Valves opening and closing. Rising stem gate valves can see screw, while non-rising stem not, reason has 'non-rising stem' and 'stem'. Non-rising stem gate 2, installation conditions for installation requirements is not high, the small size of the installation height, while rising stem gate valves need to be fully enough installation space. Non-rising stem gate valve gate in the motion direction and vertical direction of fluid medium, according to the type of gate can be divided into flexible disc and rigid disc. Three, judgment switch working state for non-rising stem drive screw is located inside the valve gate valve, the switch of gate lifting just inside the gate, so I can't through external the movement direction of the valve stem position judgment gate opening and closing. Rising stem gate valves and non-rising stem gate valves open and close are no obvious signs, so by flipping the handwheel, non-rising stem valves only size peace work experience, judgment of gate opening. Rising stem gate and non-rising stem gate difference is very obvious, although the rising stem gate valves used more widely, but in some of the work environment and pipeline conditions, non-rising stem gate is also indispensable.
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