




Dwyer Instruments ZV20412 | 2-way zone valve | 1" NPT | 120 VAC
Hot and cold water HVAC systems can effectively regulate flow with the help of ZV20412 Model Zone Valves. To regulate the temperature of a room, zone valves are usually used in conjunction with thermostats. Through the use of a bidirectional motor, the ZV2 is electrically propelled to open or close. The unit sizes are 1/2", 3/4", 1", and 1-1/4", and they can be powered by a 24 or 120 VAC source. These units are exact replacements for competitor devices and are simple to install. The manual override lever is conveniently located outside. For information about the optional auxiliary switches, BSP or sweat connections, and 220 VAC power supply, contact the factory.

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Body | 2-way, normally closed |
Connection | 1" NPT |
Connection | Electrical: 18 AWG jacketed, 9" (228 mm) long |
Cycle Time | Opening time: 50 to 65 seconds |
Enclosure Rating | General purpose |
End connection | Female NPT (optional BSP, sweat connections) |
Flow Characteristic | Quick opening |
Housing Material | PVC and polycarbonate |
Input | Floating: 3-wire; Modulating: 0 to 10 VDC or 4 to 20 mA (24 VAC power only) |
Material | Wetted: Brass, stainless steel, NBR |
Maximum Operating Pressure | Maximum: 300 psi (20.7 bar); Close-off: 43 psi (2.96 bar) |
Maximum operating temperature | Ambient: 32 to 104°F (0 to 40°C) |
Maximum operating temperature | Process: 37 to 201°F (3 to 94°C) |
POWER CONSUMPTION | Floating: 2.5 VA; Modulating: 3.5 VA |
Size | Line: 1/2" to 1-1/4" |
Type | 2-way Zone Valve |
Voltage | 120 VAC |
- Lever for manual override.
- Actuator that is detachable.
- For controllers that do not automatically cut off their signal after the valve has fully swung, there is a motor time out.
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