Two Major Categories Of Stainless Steel Stop Valves
Stainless Globe Valve can be classified into two different forms!
1. Stainless steel stop valves can be classified according to the channel direction of the stop valve
(1) Straight-through stop valve
(2) Direct-flow stop valve
The flow channel of the valve body is in an oblique line with the main flow channel, so the degree of disruption of the flow state is less than that of the stop valve, and the pressure loss through the valve is also correspondingly smaller.
(3) Angle stop valve
The fluid inside only needs to change direction once, so that the pressure drop through this valve is smaller than that of a conventional stop valve.
(4) Plunger stop valve
The valve disc and valve seat in this valve are usually designed based on the plunger principle. The valve disc is polished into a plunger and connected to the valve stem. The seal is achieved by two elastic sealing rings on the plunger.
The two elastic sealing rings are separated by a collar, and the sealing ring around the plunger is pressed firmly by the load applied to the valve cover by the valve cover nut. The elastic sealing ring can be replaced and can be made of a variety of materials.
2. Stainless steel stop valves can be classified according to the position of the thread
(1) Upper threaded stem stop valve
The thread of the stop valve stem is outside the valve body. The advantage is that the valve stem is not corroded by the medium and is easy to lubricate. This structure is widely used.
(2) Lower threaded stem stop valve
The thread of the stop valve stem is inside the valve body. In this structure, the valve stem thread is in direct contact with the medium, is easily corroded, and cannot be lubricated. This structure is suitable for small diameters and places with low temperatures.
