The primary difference between rising stem gate and non-rising stem gate valves
The nut is fixed on the disc, improve ram through the rotation of the screw, no visible door frame;
Flange valve stem ascending screw is exposed, the nut to the handwheel and is fixed (not rotating axial movement),
improve ram through rotation of the screw, the screw and the rotation of the damper is the relatively movement without the relative axial displacement,
appearance is a door shape bracket.
2, screw non-rising stem valves can't see, and can see the screw stem.3, non-rising stem valves at the switch when the steering wheel with the valve stem is connected to the relatively fixed,
it is through the valve stem in fixed point is lifting rotation to drive the valve disc and the brake to complete opening and closing.
Rising stem valves by stem and screw thread of the steering wheel drive to ascend or lowered the disc.Say simple point is rising stem valves are disc attached to do up and down together, the steering wheel is always in the attachment.
Website: http://www.didlink-valve.com/
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