Bell & Gossett CTF-1, 1" Threaded Check-Trol Isolation Flow Control Flange, Lead Free

The Check-Trol flange is a combination isolation valve, flow control valve, and companion flange for circulators. The ball valve allows the circulator to be removed from the system without draining the system. The internal spring check prevents gravity circulation. Free floating companion flange makes pump installation a snap. For use with the following circulators: NRF/NBF/SSF Wet Rotors (Except NRF-45, NBF-45) Series PL-30, PL-36, PL-55 Series 100, PR and LR