Plastic Manual Ball Valves

Type-21/21a True Union Ball Valve (1/2" – 6")

Type-21/21a ball valves are corrosion resistant plastic manual true union design quarter turn valves with hyperbolic flow characteristics, low pressure drops and reliable sealing. They are typically used in on/off applications and are offer relatively poor flow control. They are excellent for use in clean fluid service applications with very little to no suspended solids. Type-21/21a ball valves are well suited for a wide variety of fluid flow applications. True union ball valves can be lifted from the line without having to move the piping simply by loosening the two union nuts. The valves can be disassembled, and parts may be replaced.They can be pneumatically or electrically actuated.

Resources

Data Sheets

Specifications

Specifications - Type-21/21a Ball Valve

Ideal Applications Include:

Isolation valves, water treatment, water features, fountains, aquariums, landfills, swimming pools, power plants, mining, transportation, chemical processing

Specifications

Sizes:

1/2" - 4"

*6" end connections available for 4" valve bodies

PVC/EPDM/FKM Models NSF-61 Certified

CPVC/EPDM/FKM Models NSF-61 Certified

Models:

PVC & CPVC: Socket, Threaded, and Flanged (ANSI)
PP & PVDF: IPS and Metric (DIN) Socket, Threaded, Butt, and Flanged (ANSI)

Bodies:

PVC, CPVC, PP, and PVDF

Seats:

PTFE backed with EPDM or FKM

Seals:

EPDM or FKM or AFLAS

Features/Benefits

Pressure rated up to 230psi (PVC, CPVC, PVDF)
Double O-ring seals on stem for added protection
Full bore, sizes 1/2" – 2"
Full vacuum rated, all sizes
Blocks in two directions, upstream and downstream, leaving full pressure on the opposite end of the valve
Integrally molded ISO mounting pad for both manual and actuated operations
Integrally molded base pad to mount valves securely or panel mounting
PTFE seats with elastomeric backing cushions ensure bubble tight shut-off and a low fixed torque, while at the same time compensating for wear
True union design for easier installation or repairs without expanding the pipe system
Built-in spanner wrench on the handle for valve disassembly and assembly
Two sets of end connectors (socket and threaded) included with all PVC and CPVC valves in sizes 1/2"– 2"
CPVC threaded end connectors on sizes 1/2" – 1" come with stainless steel reinforcing rings
New PTFE seat design – Facilitates easier field maintenance if required
Tapered O-ring groove – Helps to keep the end connector O-rings on the valve body during installation
Body flats – Flats have been added to either side of the valve body where a wrench can be applied to prevent the valve body from turning when the union nuts are tightened
1/2" - 2" PVC and CPVC T-21A design