1. reliable, compact, self contained 2. ram-type plug for reliable tight shutoff 3. fast response 4. narrow temperature band
The NJC freeze protection valves utilize a reliable self-contained Thermal Element which is sensitive to temperature and operates without any electrical power or air pressure. Typically in solar applications, the valve port opens on descending temperatures reaching the critical temperature allowing the near freezing water in the solar panel to be discharged and replaced with warmer supply water. When the warmer water reaches the set up point, the valve port closes and water discharge stops.
This cycle will repeat as often as necessary to help prevent freezing. The amount of water dispensed depends mainly on ambient air temperature; make up water temperature, the duration of the cold spell and the number and size of collectors. The system is functioning properly when water is being discharged from the valve during near freezing conditions.
Design Features:
* Brass body and thermal element
* Narrow temperature band
* Compact, low mass - Fast response
* Ram-type plug for reliable tight shutoff
* Downstream actuator for greater sensitivity
* Sensitive to temperature only
* Unaffected by pressure variations
* Easy installation with pipe wrench
* Discharges the minimum amount of water required to prevent freeze damage
Model | Port Size | Open~Close Temperature(°C) | Maximum Operating Temperature(°C) | Maximum Operating Pressure(MPa) | Flow Rate (Cv) | Dimension(mm) | Net Weight(g) |
LF47 F/P 45 | DN20 | 3~6 | +130 | 1.0 | 1.0 | Φ25*87 | 185
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F45 Freeze Proof Valve
