Rising Stem Gate Valve Drawing

In rising stem type valves when the gate 8 is raised or lowered.

Rising stem gate valve drawing.

It is atex approved bi directional with full and plane bore and designed with ductile iron body stem gate bolts of stainless steel 316 and reinforced nbr sealing. Stem nut for open stem gate valve is on its cover. In this type of valve stem threads are exposed to the flow medium. Extension stems and mud valve arrangements drawings.

According to the screw position of the stem the gate valve can be divided into rising stem gate valves and non rising stem gate valve nrs. Shear gate valves 4 12 inch shear gate flange end single wedge 14 30 inch shear gate flange end single wedge lift rod. A gate or plug vale shuts off the low water t valve drain line. Gate valves are classified as either rising stem or non rising stem valves.

There is no upward movement of the stem in a non rising stem type. The disc travels along the stem like a nut when the stem is rotated. Ss mud valve non rising stem fabricated 14in 24in 2in cl mud valve op nut. The non rising stem valve is shown in figure 7 2.

As the handwheel on the stem is rotated the gate travels up or down the stem on the threads while the stem remains vertically stationary. Mud valve rising stem ci 4in 18in mud valve sliding stem ci 3in 24in. Extreme travel tandem t valve setup. For applications that require more than eight feet of travel between high and low water two t valves are utilized one for high water settings and one for low water settings.

2 shows a cut through view of the yoke for a gate valve with the stem in a lowered position and the limit switch disengaged with a groove around the stem. You can see the image. The stem is threaded into the gate. Non rising stem gate valve or insider screw valve.

1 shows an exploded view of a gate valve. Compared with other valves gate valves have a wider range of combined applications for pressure service fluid design pressure and temperature.