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Model: 3196
UPC: 687752333749ORDERS OVER $99 SHIP FREE
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The 3196 from Taco is a 3/4” NPT x Union Pressure Differential Bypass Valve. It provides an accurate and dependable means to control excess flow in zone valve systems that can be created when there is a reduction in the demand for heat. This reduced heat demand typically occurs as zone thermostats are satisfied and their corresponding zone valves close, causing the system pump to attempt to force more water through the remaining zones.
By installing a Taco 3196 Differential Bypass Valve between the discharge of the system pump and somewhere before the inlet of the pump (usually on the system return) you create an automatically regulated flow path. This regulated flow path prevents unacceptable velocities from being pumped through the zones that remain open during reduced demand periods.
Differential Bypass Valves should also be used to prevent dead heading of the circulator in systems where parallel piped heat emitters are controlled by thermostatic radiator valves.
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