Stainless steel gate valve

gate valve (gate valve) is a kind of equipment for the gate valve with the valve stem for linear movement, the material is divided into 304 stainless steel gate valve, 316 stainless steel gate valve, 321 stainless steel gate valve, the expression method is: Z41H-16P.

The opening and closing part is a ram, the direction of motion of the ram is perpendicular to the direction of the fluid, the gate valve can only be fully opened and fully closed, can not be adjusted and throttled; The ram has two sealing faces, the most commonly used mode of the two sealing faces of the ram valve form a wedge, the wedge Angle varies with the valve parameters, usually 50, the medium temperature is not high when 2°52' At the same time, the ram can be made into a whole body, called a rigid ram; It can also be made to produce a micro deformation of the ram, in order to improve its processability, make up for the sealing surface Angle in the processing of the deviation, this ram is called elastic ram.

Technical parameter

1, nominal pressure: 1.0MPa, 1.6MPa, 2.5MPa

2, shell test pressure: P=1.5PN

3. Seal test pressure: P=1.1PN

4. Outlet pressure:

PN1.0MPa (0.09~0.8MPa)

PN1.6MPa (0.10~1.2MPa)

PN2.5MPa (0.15~1.6MPa)

5. Applicable medium: water

6, applicable temperature: 0℃ ~ 180℃

Sort

The type of stainless steel gate valve, according to the sealing surface configuration can be divided into wedge gate valve and parallel gate valve, wedge gate valve can be divided into: single gate type, double gate type and elastic gate type; Parallel gate valves can be divided into single and double gate valves. According to the thread position of the valve stem, it can be divided into two kinds: open stem gate valve and dark stem gate valve. This type of valve should generally be installed horizontally in the pipeline.

When the valve is opened, when the lift height of the gate is equal to 1:1 times the diameter of the valve, the channel of the fluid is completely unblocked, but this position can not be monitored during operation. In actual use, it is the vertex of the valve stem as a sign, that is, the position of the opening cannot be moved, as its full open position. In order to consider the temperature change, the locking phenomenon is usually opened to the apex position, and then reversed 1/2-1 turns, as the position of the fully opened valve. Therefore, the fully open position of the valve is determined by the position of the ram (that is, the stroke).

Some gate valves, the valve stem nut is located on the gate plate, the hand wheel rotation drives the valve stem to rotate, and the gate plate is lifted, this valve is called the rotating rod gate valve or the dark rod gate valve.

Product characteristics

1, the selection of materials, in line with domestic and foreign standards, the overall quality of materials is high.

2, meet the requirements of advanced standards at home and abroad, reliable sealing, excellent performance, beautiful shape.

3, the sealing pair is advanced and reasonable, the sealing surface of the gate and the seat is surfacing with Stellite cobalt-based cemented carbide of different hardness, reliable sealing, high hardness, wear resistance, high temperature resistance, corrosion resistance, good abrasion resistance and long life.

4, the valve stem after tempering and surface nitriding treatment, has good corrosion resistance, abrasion resistance and wear resistance.

5, Using wedge type elastic ram structure, large diameter thrust bearing, small friction, and equipped with impact manual, easy to open and close.