These CPVC (chlorinated polyvinyl chloride) true union ball check valves have a higher temperature tolerance than regular PVC. CPVC is rated for temperatures up to 200F (93C), which is significantly higher than PVC’s temperature rating of 140F (60C). All of our CPVC true union ball check valves provide a professional-grade, low-maintenance solution for any user who needs a check valve in their piping system. These valves have Viton O-rings which can withstand pressures up to 150psi. Viton is a top-of-the-line rubber that provides a strong and long-lasting seal and is compatible with almost every material.

“Viton CPVC True Union Ball Check Valve” is a long name, so we will explain what each part means. “Viton” is the type of rubber that the O-ring seal is made of in these valves and what sets them apart from our other CPVC true union ball check valves. “CPVC” is the type of plastic the body of the valve is composed of. “True Union” refers to these valves’ multi-part body which can be taken apart from easy maintenance. A “Ball Check Valve” is a valve that opens and closes depending on which way fluid is flowing through the valve and uses a ball-shaped seating to start or stop flow.

There are many types of check valves, with ball check valves being just one variety. Each type of check valve has its own strengths and weaknesses, but it is important to know what makes this type stand out. Our ball check valves use a half-ball seating. When fluid flows through a system the correct way, it hits the spherical side of the seating and is allowed to pass through the valve. If the fluid tries to flow back the other way, it gets caught in the opposite, concave side of the seating and pushes the valve closed. A typical ball valve requires manual operation to open and close, so it should not be confused with a ball check valve.

Viton, which is what makes up these valves’ O-rings, is a synthetic rubber and fluoropolymer elastomer. It is most commonly used in O-rings, chemical-resistant gloves, and other molded rubber products. Viton is often green or brown in color, which distinguishes it from other types of rubber. What really sets Viton apart, however, is its extremely high density of 1,800 kg/m3. This is significantly higher than typical rubber densities of 1,010-1,520 kg/m3.

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