Bell & Gossett Triple Duty Valves are a combination shut-off valve, centered guided non-slam check valve, and calibrated balance valve in one device. Triple Duty Valves provide all of the functions normally required on the discharge side of hydronic pump systems. Combining multiple valves helps save space and reduces installation time and money.
Triple Duty Valves feature a calibrated nameplate designed to allow the accurate balance of the system and throttle excess flow. Model 3DV valves utilize a calibrated ball valve design that provides complete shut-off. Model 3D and 3DS valves use a disc-style globe valve design that also features a soft seat design that provides complete shut-off and prevents valve chatter. Additionally, all valves feature a memory stop or button to allow the valve to return to its set position after shut-off. All B&G Triple Duty Valves also include a spring-loaded check valve to prevent backflow and gravity circulation.
Model 3DV Triple Duty Valves feature a brass body, chrome-plated brass ball, and glass-filled Noryl check valve with a stainless steel spring. They include two extended P/T valves and an extended stem to allow for ease of installation in insulated systems and have a choice of FNPT or rotatable flange inlet connection. They are available in sizes 1" through 2" and are suitable for up to 200 psi and 250°F.
Model 3D (angle pattern) and 3DS (straight pattern) valves feature iron bodies, brass discs with EPDM seats, and stainless steel springs. They are available in sizes 2" through 16", have either flanged and grooved end connections, and are suitable for either 175 psi (flanged) or 300 psi (grooved) pressure and 250°F.
Bell & Gossett Triple Duty Valve Features:
Calibrated balance valve with nameplate and memory stop/button