Publish Time: 2023-04-11 Origin: Site
A stop valve is a valve in which the separating element moves along the center line of the valve seat. Since this type of stop valve has a fairly short opening or stem tip stroke and a reliable shut-off function, while the change in the opening of the stop seat corresponds to the stroke of the separating element, it is very suitable for flow-related regulation. So it is very suitable for flow-related regulation. Therefore, this type of stop valve is very suitable for shut-off or adjustment and throttling. Next, let's take a look at the selection principles and characteristics of a stainless stop Check valve.
Here is the content list:
l Stop Valve's 4 selection principles
l 4 characteristics of Stop Valve
1. Cast steel gate valves should be used in high-temperature, high-pressure pipelines or bends. This also applies to high-temperature, high-pressure passages in thermal power plants, nuclear power stations, and petrochemical systems.
2. Small and large chemical diseases in the synthetic artificial product should use a high-pressure angle stop valve or high-pressure angle throttle stopcock with nominal pressure PN160 nominal pressure 16MPa or PN320 nominal pressure 32MPa.
3. In the desalinization factory and channels that are prone to coking in the product of alumina Bayer, it's easy to choose a DC stop valve or DC garrote stopcock with a separate stopcock body, removable stopcock seat, and hard amalgamation sealing brace.
4. During the opening and closing of the gate check valve, the separation force between the sealing surfaces of the disc and the check body is lower than that of the gate check valve, making it resistant to wear and tear. The opening height is generally only 1/4 of the periphery of the seat channel, so it is much lower than a gate check valve. In general, there is only one sealing surface on the check valve body and check valve piece, so the manufacturing process is better and easy to maintain.
1. The structure of a stop valve is simpler than that of gate valves, and it is more convenient to manufacture and maintain.
2. The sealing surface is not easily worn and scratched and has good sealing performance. When opening and closing the valve, there is no relative sliding between the sealing surface of the valve flap and the valve body. Therefore, the stop valve is no serious wear and scratches, has good sealing performance, and long service life.
3. Due to the lower head of the ball valve when opening and closing, The height of the ball valve is therefore lower than that of the stop valve, but the frame length is longer than that of the stop valve.
4. Because the valve channels are threaded connections, there is high environmental resistance and high energy consumption. When the globe valve is fully open, the spool is often corroded. The axis of the ball valve stem should be perpendicular to the sealing surface of the valve seat. The relatively low opening and closing heights give a very reliable closing performance, making this valve suitable for cutting, regulating, and throttling.
The reason for the popularity of stop valves is that they are more durable and easy to maintain due to the low friction between the sealing surfaces during opening and closing. Wenzhou Luomai ValveTechnology Co.Ltd. specializes in gate valve products with excellent quality, so if you are interested in them, consider our cost-effective products.