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Brass zone valve body with actuator housing, 3/4 inch connections

Legend Valve

Legend Valve 800-704NE 2-Way Zone Valve 3/4" 5.4 CV

SKU CH-K73T-3MGG1

A 3/4-inch two-way zone valve with a 5.4 CV factor and normally closed operation

  • Two-way zone valve controls hydronic flow efficiently
  • 4 CV factor delivers strong flow capacity
  • Three-quarter inch connection fits standard piping
  • Normally closed design ensures fail-safe operation
  • No end switch simplifies wiring installation

Two-way zone valve for hydronic control

This two-way zone valve regulates flow in hydronic heating or cooling circuits. It is intended for installers and facility managers who need reliable on-off control of a single zone without an end-switch feedback signal.

Normally closed operation without end switch

The valve stays closed until the actuator is energised, then opens to allow flow. Because no end switch is fitted, the device cannot send a confirmation signal back to the controller, limiting its use to systems that do not require position verification.

5.4 CV flow capacity with 3/4-inch connections

A flow coefficient of 5.4 CV provides ample capacity for typical residential or light-commercial zones. The 3/4-inch ports match common copper or PEX piping, while the California Proposition 65 notice indicates the presence of listed chemicals.

Highlights

  • Two-way zone valve controls hydronic flow efficiently
  • 4 CV factor delivers strong flow capacity
  • Three-quarter inch connection fits standard piping
  • Normally closed design ensures fail-safe operation
  • No end switch simplifies wiring installation

Specifications

BrandLEGEND VALVE

Questions about this item

Which Legend Valve 2-way zone valve model should I choose for a 3/4" system?

The 800-704NE is the 3/4" normally closed model with a 5.4 CV factor and no end switch, matching that pipe size directly.

What does the 5.4 CV factor mean once the valve is installed?

A 5.4 CV factor indicates the flow capacity; the valve will pass 5.4 US gallons per minute of water with a 1 psi pressure drop across it.

How does the normally closed design without an end switch affect wiring and operation?

The valve stays closed until the actuator is powered open; without an end switch there is no auxiliary contact to signal a controller or start a pump.

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