Emergency Shower and Eye Wash Eyewash Equipment Anti-Freeze Crack Valve 1/2 Frost Valve

Product description:
Antifreeze valve internal flame state, can accurate perception water temperature, opening and closing without any power supply work. With the loss of the environmental temperature, frost valve opens when water temperature is close to freezing point, the system of low temperature water is flowing rapidly. When the water temperature rise to the set value, the pressure frost valve closed, stop the drainage. This process will be according to need to cycle, at the same time of antifreeze keep system from the water at least.
Product features:
1. The pure mechanical structure, is absolutely safe
2. A small amount of drainage can achieve prevent frostbite, definitely save money
3. Like the faucet installation is simple, convenient, the existing system is easy to transform
4. Open/close completely automatically, thoroughly solve your winter antifreeze problems - save worry
5. Automatic flame state failure protection design (flame state failure, the valve automatically open)
6. Copper body, rust, scale prevention design
7. The interface size: DN15 (G1/2)
8. The highest working temperature: 75 ° C
9. The maximum working pressure: 1 mpa
10. Flow coefficient Cv: 0.711. 100% products testing
Products are widely used:
Tap water system, urban sanitation system, circulating water system, fire water supply system, port, railway system of filling water, petrochemical refining of utility system, such as sprinkler, fire engines and other special vehicles, such as the winter freeze.
Application: apply ice can cause damage to the device and equipment
1. Outdoor solar installation;
2. Gas boiler antifreeze protection when the power is cut off;
3. Outdoor air source heat pump host;
4. Water cooling airtight device, such as fuel engine cooling system;
5. Outside the waterway system without heat preservation measures;
6. Cold district heating system stops running security accident;
Frost valve installation and matters needing attention:
1. Frost valve should be installed in the end of the line pressure (pictured above), or antifreeze valve downstream of the water will not be discharge and may lead to freezing.
2. The exposed to the environment, the need to freeze protection of pipes freeze protection valve should be installed every line.
3. Do not install near the heat source, such as untight seal of pipeline crossing into account or smoke beside), nor any heat preservation measures the frost valve. In order to prevent the frost valve perceive minimum temperature in the water supply system, no water anti-freezing insurance role in the system.
4. Frost valve should be installed vertically, according to different the size of the freeze protection system, select the appropriate flow of antifreeze valve, can also be multiple frost valve installed in parallel to increase the flow rate of valve in antifreeze.
5. Every time before the cold season, in order to ensure the frost valve normal work, can be simple to frost valve test: will frost valve immersed in a container full of ice, frost valve will have the water out in a few minutes, after you remove the container, the valve should be closed, show that frost valve work normally.
Winter antifreeze little common sense:
Natural heat transfer from high to low temperatures. As long as constantly lose heat water, the water temperature will be falling. When water temperature dropped to 0 ° C will freeze. When water freezes in, as the temperature drops, from a liquid into a solid.
And any other material characteristics of the heat bilges cold shrink, the water temperature from 4 ° C continues to fall, the volume will increase continuously, produce a great pressure in the pipeline, enough to destroy pipeline, water meter, valve and other facilities. While frozen water pipe burst, not only need to replace the damaged parts, such as running water damage, can produce more additional maintenance cost and production, such as shutdown losses.
Piping, valves and other facilities will freeze when the temperature drops to 0 ° C. The velocity of the water temperature to reduce heat loss depends on the water and water. The main factors influencing the water in the pipe heat loss are:
* line the outer wall heat resistance ability
* line outside the wind speed
* pipeline surface area
* water in the pipe and the outside air temperature

The pipeline surface area and water temperature difference with the outside world the biggest influence on water in the pipe heat loss. Any a multiply these two factors, the speed of the water in the pipe heat loss will be multiplied. In addition, adding insulation to line will greatly reduce the heat loss of water inside, but not a kind of thermal insulation layer can completely prevent heat loss, if the canal water will not flow, the heat loss under the condition of continuously, the water will eventually be freezing.
Pipeline anti-freezing there are two most basic method: heat tracing and drainage (steam or electric heating).
Heating: with the pipe installation of electric tracing band or steam side by side with heat pipe, insulation outer package. Electric heating or heating with heat pipe is used to compensate the heat loss of water in the pipe in order to achieve the purpose of antifreeze. As some of the solar energy water heater and water pipe is electricity for freeze protection.
Drainage: is one of the people the most simple and commonly used method, can avoid a lot of pipeline installation fee and heat tracing operation cost.


As shown in the above, line (A and B) above the ground water will continue to heat being lost to 15 ° C environment until they are frozen, if water will not flow). Hypothesis point B water at 4 ° C, the valves are open slightly, underground pipeline in 8 ° C water along the line to drain out of the above the ground. If the water right, water temperature in the pipeline, although will decline, but not from point B when the temperature below 4 ° C. If the temperature continues to fall, or there is a strong wind blowing, point B must further open the valve, the flow increased, the water out valve when the temperature does not less than 4 ° C.