2. ram-type plug for reliable tight shutoff
3. fast response
4. thermal element
The NJC solar freeze protection valves utilize a reliableself-contained Thermal Element which is sensitive to temperatureand operates without any electrical power or air pressure.Typically in solar applications, the valve port opens on descendingtemperatures reaching the critical temperature allowing the nearfreezing water in the solar panel to be discharged and replacedwith warmer supply water. When the warmer water reaches the set uppoint, the valve port closes and water discharge stops.
This cycle will repeat as often as necessary to help preventfreezing. The amount of water dispensed depends mainly on ambientair temperature, make up water temperature, the duration of thecold spell and the number and size of collectors. The system isfunctioning properly when water is being discharged from the valveduring 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 freezedamage
Model | Port Size | Open~CloseTemperature(°C) | Maximum OperatingTemperature(°C) | Maximum OperatingPressure(MPa) | Flow Rate (Cv) | Dimension(mm) | Net Weight(g) |
LF47 F/P45 | DN15/DN20 | 3~6 | 130 | 1.0 | 1.0 | Φ25*87 | 180 |
LF47 F/P35 | DN15/DN20 | 1~4 | 130 | 1.0 | 1.0 | Φ25*87 | 180 |
