#1piece ball valve full#
Three-piece ball valves are available with full port and standard port options and are favored for applications in which frequent maintenance is necessary. Additionally, the ability for the connectors to remain in place during maintenance prevents a line shutdown, so production can continue as needed. They can remain in service for their intended lifespan, sometimes longer, and replacing the components is far less expensive than replacing the entire valve. While three-piece ball valves carry a higher cost up front than those with fewer pieces, they are often the more cost-effective option in the long term. Both metal and elastomeric components can be easily replaced, including the ball, ball seat, stem and seals. The connectors are typically either threaded, welded or flanged to a pipe, which allows only the valve body to be removed for cleaning and repairs. What is a 3-Piece Ball Valve?Ī 3-piece ball valve consists of a main body and two pipe connectors, one at each port. They are compact, reliable and economical, if slightly more expensive to replace than 1-piece ball valves. Two-piece ball valves provide bidirectional flow shutoff and are available in full port configurations for applications where flow rate is critical. Unscrewing this connection disrupts this seal and is not recommended. Furthermore, the NPT connection is designed to be screwed in once and properly torqued to create a metal-to-metal seal within the valve body. Like 1-piece ball valves, 2-piece ball valves are not designed to be repaired, since removing them once they are screwed in can cause galling on the threads (wear due to adhesion). They are also available with a bolt and flange connection assembly, as well as with larger port sizes. Two-piece ball valves feature a main body with a single threaded end connection and a lever. For applications where flow rate is a critical consideration, 1-piece ball valves may not be the best choice.
One-piece ball valves are typically offered only in reduced port sizes, meaning the port size of the ball valve is smaller than that of the pipe size. One-piece ball valves are not designed to be repaired, so they must be replaced when damaged or corroded - hence the moniker “throwaway valves.” They are compact, economical, lightweight and reliable, since they present few opportunities for leakage.
#1piece ball valve manual#
When to Use 1-Piece & 2-Piece Ball Valvesġ-Piece, 2-Piece & 3-Piece Ball Valve Comparison What is a 1-Piece Ball Valve?Ī 1-piece ball valve consists of a single, solid body with two openings, threads for screw-in connection and a manual handle or actuator for operation. Several of these variations involve the number of pieces that make up the valve body design, which affects the upfront cost and capacity for maintenance. Ball valves appear in many industrial and commercial processing systems, and there are product variations that can accommodate almost any application. Chosen for their durability and reliability, ball valves provide on/off control for fluid or gas media.
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