True Union
![Asahi/America Duo-Bloc Type 21: Manually Actuated - CPVC \ EPDM](/sites/default/files/styles/list/public/images/product/1d2fd29c6921d1d725c55c55563e/1609005.2.jpg?itok=EUd1n7pg)
Asahi/America Duo-Bloc® Type 21 thermoplastic ball valves provide a dependable and economical way to handle corrosive chemicals. They perform at temperatures up to 250°F, and pressures to 230 psi (150 psi for polypropylene valves). True Union Duo-Bloc® Type 21 Ball Valves can be lifted from the line, simply by loosening the two union nuts. The valve can be disassembled, and parts may be replaced. The Duo-Bloc® feature blocks in two directions, leaving full pressure opposite, and allowing disconnection of downstream piping.
![Asahi/America Duo-Bloc Type 21: Manually Actuated - CPVC \ FKM](/sites/default/files/styles/list/public/images/product/1d2fd29c6921d1d725c55c55563e/1609005.2_0.jpg?itok=vtgrqdwy)
Asahi/America Duo-Bloc® Type 21 thermoplastic ball valves provide a dependable and economical way to handle corrosive chemicals. They perform at temperatures up to 250°F, and pressures to 230 psi (150 psi for polypropylene valves). True Union Duo-Bloc® Type 21 Ball Valves can be lifted from the line, simply by loosening the two union nuts. The valve can be disassembled, and parts may be replaced. The Duo-Bloc® feature blocks in two directions, leaving full pressure opposite, and allowing disconnection of downstream piping.
![Asahi/America Duo-Bloc Type 21: Manually Actuated - PVC \ EPDM Breadcrumb Home Asahi/America Duo-Bloc Type 21: Manually Actuated - PVC \ EPDM](/sites/default/files/styles/list/public/images/product/1d2fd29c6921d1d725c55c55563e/1601005.jpg?itok=T5khWRa7)
Asahi/America Duo-Bloc® Type 21 thermoplastic ball valves provide a dependable and economical way to handle corrosive chemicals. They perform at temperatures up to 250°F, and pressures to 230 psi (150 psi for polypropylene valves). True Union Duo-Bloc® Type 21 Ball Valves can be lifted from the line, simply by loosening the two union nuts. The valve can be disassembled, and parts may be replaced. The Duo-Bloc® feature blocks in two directions, leaving full pressure opposite, and allowing disconnection of downstream piping.
![Asahi/America Duo-Bloc Type 21: Manually Actuated - PVC \ FKM](/sites/default/files/styles/list/public/images/product/1d2fd29c6921d1d725c55c55563e/1601005_0.jpg?itok=g0iFRXFt)
Asahi/America Duo-Bloc® Type 21 thermoplastic ball valves provide a dependable and economical way to handle corrosive chemicals. They perform at temperatures up to 250°F, and pressures to 230 psi (150 psi for polypropylene valves). True Union Duo-Bloc® Type 21 Ball Valves can be lifted from the line, simply by loosening the two union nuts. The valve can be disassembled, and parts may be replaced. The Duo-Bloc® feature blocks in two directions, leaving full pressure opposite, and allowing disconnection of downstream piping.
The True Union feature, an exclusive Chemtrol® introduction over twenty years ago, has become an industry standard. Coupled with its other features, the Chemtrol® Tru-Bloc™. True Union Ball Valve adds up to great versatility and significant savings in operating and maintenance costs. Chemtrol® Tru-Bloc™ True Union Ball Valve’s heavy-duty stub-acme thread-seal carrier retaining ring provides more reliability than other designs. Double-block design stops flow in either direction - upstream and downstream - when the alternate union is removed for servicing of the system.