Stainless Steel Non-Rising Stem Gate Valve For Corrosion Medium Use

Product Introduction:

Non rising stem stainless steel gate valve, replacing traditional cast iron valve, has a compact structure, reasonable design, good valve rigidity, smooth channel, large flow coefficient, small flow resistance coefficient, simple structure, and easy maintenance. Its sealing surface is made of stainless steel and hard alloy, with a long service life. Using flexible graphite filling, reliable sealing, and easy and flexible operation. It refers to a valve that moves the closing element (gate) vertically along the centerline of the passage. Gate valves are mainly used for cutting off in pipelines. Flexible and reliable operation, excellent sealing performance.

Non rising stem stainless steel gate valve also known as a concealed stem wedge gate valve, has a stem nut located on the gate plate. The handwheel is rotated to drive the stem to rotate and lift the gate plate. Usually, there is a trapezoidal thread at the bottom of the stem. Through the thread at the bottom of the valve and the guide groove on the valve disc, the rotational motion is transformed into linear motion, that is, the operating torque is transformed into the operating thrust. When opening the valve, the lifting height of the gate is equal to 1:1 times the valve diameter, the fluid channel is completely unobstructed, but this position cannot be monitored during operation. In actual use, the vertex of the valve stem is used as a marker, that is, the position that cannot be opened, as its fully open position. To consider the phenomenon of locking due to temperature changes, the fully open position of the valve is usually determined by the position (i.e. stroke) of the gate, which is opened to the top position and then reversed by 1/2 turn.

Product Technical Parameters:

Product features:

1. Compact structure, reasonable design, good valve rigidity, smooth channel, and low flow resistance coefficient;

2. The sealing surface is made of stainless steel and hard alloy, with a long service life;

3. Adopting flexible graphite packing, reliable sealing, and easy and flexible operation;

4. Driven method can be manual, electric, and level gear operation.

5. Structural forms: elastic wedge single gate, rigid wedge single gate, and double gate types;

6. Widely used as an opening and closing device for connecting or cutting off media in oil and steam pipelines, such as petrochemical and thermal power plants.