A check valve is a type of valve used to control flow of fluids, typically liquids. Its design makes it suitable for both liquid and gas applications. Moreover, these valves are highly economical and FDA-compliant. These valves are also available in stainless steel, making them suitable for piping installations in stainless steel. The following are some benefits of a check valve:
The size and design of a check valve depends on its use and industry. brass check valves manufacture These valves can be one inch in diameter, or several feet in diameter. The size of the stopping device and seat are also important factors to consider. A properly sized check valve can be easily installed in a flow line that already exists. If not, you can use the pipe dimensions to choose the right size for your application. Here are some of the different types of check valves:
The outlet side of a check valve has a two-level valve seat, and it also has built-in channels. When positive flow enters the valve, the disc lies against the seat. Flow then flows through the channels and out the exit port. A check valve is a one-way valve, so it is important to properly install it. The flow direction indicated on the check valve is usually indicated by an arrow or logic symbol.
Another type of check valve is the self-cleaning ball check valve. A self-cleaning ball valve rotates during operation to remove any impurities that may be stuck between the ball and seat. Despite the fact that self-cleaning valves are largely leakproof, some fluid can still leak around the ball and seat when it is closed. Over time, the ball mechanism of a check valve can wear out and become stuck in the process line.
A non-slam check valve is often specified for processes involving oil and gas. It’s also ideal for oil and gas pipelines and gas export facilities. The swing check valve is especially effective for large-volume applications and horizontal pipe runs. In addition to these uses, non-slam check valves can also be used in chemical manufacturing processes and steam condensate systems. If you’re concerned about safety, a non-slam check valve is the answer.
The swing check valve uses a disc inside the valve. As fluid flows through it, pressure causes the disc to open, which allows flow through. In the reverse direction, it closes against the seat, preventing flow from reversing. Typically, a swing check valve is installed in sizes up to two inches, though they can also be used for smaller applications. Swing check valves are not suitable for pulsating or directional flow.
A check valve requires a certain minimum upstream pressure to open. This difference in pressure is referred to as cracking pressure. The cracking pressure is the minimum pressure that the valve needs to open fully. A normal check valve’s cracking pressure is dependent on the size and design, so it’s important to determine the cracking pressure of the system before installing the valve. This is an important requirement for a check valve because it controls flow rates.