Stainless steel check valve Pilot operated check valve

Check valves are often used when multiple gases are mixed into one gas stream. A check valve is installed on each one of the individual gas streams avoid mixing of the gases in the original tool. For example if a fuel and an oxidiser need to be mixed then check valves will normally be used on both the fuel and oxidiser sources to ensure that the original gas cylinders remain pure and therefore nonflammable. Check valves are used with some types of shoes. Pistondriven and diaphragm pumps such as metering pumps and pumps for chromatography commonly use inlet and outlet ball check valves.

These valves often look like small cylinders attached towards the pump head located on the inlet and outlet lines. Many similar pumplike mechanisms for moving volumes of fluids around use check valves for ball check valves. Operating on a twoport system check valves have a gap where fluid or gas is absorbed in to the first port. It is then regulated by a mechanism separating the two ports that allows water to be drawn from the first ones to the second port and out a dent without allowing fluids to reenter begin port.

Types of Check Valves Ball Check Valve This check valve uses a ball covering a round opening to find the first and second port. When fluid is drawn inside of ball is pushed forward. When the fluid is pushed back the ball is pressed in the round opening which creates a seal and allows all fluid to flow out the second port in the intended direction. Swing Check Valve One of the most common varieties of valves a swing check valve is utilized inside household toilet tanks as well as in a lot of other areas.

Instead of a ball controlling flow this valve the actual small door on hinges that opens when water is drawn in and closes when the flow of water is stopped thereby not allowing any fluid to drain out of the valve s entrance. This particular valve is also sometimes referred to as a tilting disc check control device. Disc Check Valve A more complex check valve it truely does work with a disc mounted on a spring. Pressure from the inlet opens the disc by stretching the spring. When the flow stops the spring is compressed and the disc returns to the closed position.