Product Series Description

Our ETDV triple duty valves are primarily required on the discharge side of a centrifugal pump in a hydronic heating or cooling system. The valves functions as a shut-off valve, spring loaded silent check valve, and balancing valve. 

Our ETDV has an automatic and silent operation. The disc will open when the line pressure is approximately 1/4 PSI. As the line pressure approaches zero, the spring will close the disc to prevent flow reversal and water hammer. The flow through the valve can be adjusted from bubble tight shut-off to full flow by the acme rising stem.

The center guided soft seal disc ensures that there is no leakage. The rising stem design includes an adjustable position indicator for accurate disc positioning for throttling service. The unit comes with a standard gauge taps at both the inlet and outlet sides and a NPT drain plug.

Our ETDV’s are constructed from rugged cast iron castings that are machined to exacting specifications. These bodies have drilled flanges that are in accordance with ASME B16.1.

Features & Benefits

3 Valves in 1A triple duty valve replaces a balance valve, shut-off valve, and a check valve.
FlangesValves are complete with FF flanges in accordance with ASME B16.1.
Automatic & Silent OperationThe valve is spring loaded to ensure that the disc closes as the line flow approaches zero. This feature prevents water hammer.
Line PressureLine pressures of approximately 1/4 PSI will open the disc.
Flow AdjustmentFlow through the valve can be adjusted from zero to full flow by the ACME rising stem.
Bubble-Tight SealingSoft-seated dovetail O-ring groove ensures bubble-tight sealing when the valve is positioned in the fully closed position.
Graduated Position IndicatorThe rising stem incorporates a graduated position indicator to ensure accurate disc positioning for the throttling service.
Hand-WheelAll valves supplied with hand-wheel for ease of operation.
Connection PlugsDrain and differential connections are furnished with a plug as standard.

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