Ball Valve Asahi Type 21 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.
Featured :
Easy to Be Automated (No Madification requir)Featuring a new intregal molded top flange. The BALL VALVE TYPE 21 can easily be converted from the manual to automatic without replacing the body.
Simple Installation on Panel Piping
New bottom stand with an insert hole allows the valve to be secured on bench or panel only by inserting a metallic insert.
Double-O-ring
The stem uses a double-O-ring, sealing arrangement improving durability sealing performance. The upper O-ring groove is deeper than the lower O-ring groove. Because of this design, the stem would break first at the upper O-ring groove, acting as a back up seal.
