Selecting the right piston check valve is significant where various fluid systems are under consideration. They play a significant role in avoiding backflow, holding pressure, and safeguarding your equipment. In this guide, we will go through the process of choosing a piston check valve to meet your needs, including information from EWOM VALVE CO. LTD., which operates among the leading manufacturers in the industry.
Understanding Piston Check Valves
A piston check valve is a kind of valve that allows the fluid to flow in a particular direction and disallows the fluid to flow in the opposite direction. It comprises a piston that either moves within a cylinder or the pressure of the fluid pushing it. If the pressure on the inlet side is higher than the pressure at the outlet, then the piston rises and lets fluid through. If the pressure reverses, the piston closes upon the valve seat and prevents the backflow of water.
Application Requirements
In choosing the most appropriate piston check valve, it is prudent to pay attention to your unique test requirements. They include the type of fluid that will flow through the valve whether in the state of liquid or gas. Make sure that the valve body materials are right for the fluid so that they do not wear out easily due to corrosion. Furthermore, compare the operating pressure range and temperature range. These are the conditions that has to endure without affecting its performance.
Valve Material
The type of material used in creating the valve is another important consideration. The body material of the valve should therefore be chosen based on the specific environment in which the valve is expected to operate. Typical base materials include stainless steel, brass, and bronze, which are selected based on the intended use of the sound attenuator. The seat material is also crucial since it must fit the contours of the body closely and be resistant to abrasion. The available materials for seats can be rubber, metal, or any composite materials.
Valve Size and flow rate
The size of the valve used here is critical in achieving the intended flow rate and functionality of the system. The valve size has to be in proportion to the pipe size and the intended flow rate of the given pipeline. If the valve is too small it will limit the flow, if on the other hand, the valve is too large it will not close properly allowing for backflow of water and potential harm.
End Connections
Sealing or end connections are vital to guarantee that there will be no leaks in the installation process. Screwed connections are used in smaller-diameter pipes and low-pressure systems. The flanged connections are more suited for large-diameter pipes and high-pressure systems to provide a good and strong connection. Welded connections are also used where a permanent joint is desired especially when the pressure and temperature conditions are high.
Installation Orientation
Make sure that the valve is fitted in the proper orientation relative to how the system is installed. Some piston check valve are intended for horizontal or vertical use only to work effectively. Misalignment causes malfunction and low efficiency of the electrical equipment.
Special Features and Considerations
Another factor to look for is the non-sam design which closes cautiously and doesn’t cause a water hammer or nasty banging noise. This is important in systems that might experience high pressure, to safeguard the valve and the whole system.
Other factors include; maintenance and access to the building. It is also important to select a valve with a design of access for maintenance and inspection services. Maintenance plays a very important role in the reliability and long service of the valve as it can be used in the system for a very long time.