Although the butterﬂy valve internals vary marginally, they both have a slimline butterﬂy disc for low resistance and smooth operation. The major difference between the A Series Butterﬂy Valve and the E Series Butterﬂy Valve can be identified by the handle type.
A Series Valve
An A Series Valve has a stainless steel lockable trigger action 5-position handle design, food-grade silicone gasket and a maximum working temperature of 180°C. The parts on the A Series Valve are interchangeable with Keystone F250 valve.
E Series Valve
The E Series Valve has a stainless steel pull and twist 3-position handle design with an easily identifiable blue spherical ball, a food grade EPDM gasket and a maximum working temperature of 120°C.