User guide
ENKAIR self-operated temperature control valves all use "expansion wax" type temperature sensing element (that is, temperature control spool), the set temperature of the spool has been set before the factory, and can not be changed after the factory. If you need to change the setting temperature of the temperature control valve, you must change the corresponding temperature control spool.
1. inspection
After receiving the temperature control valve, you must immediately carefully check whether the valve is damaged during transportation, and carefully check whether the order is consistent with the model on the temperature control valve. If you notice any problems, please contact the ENKAIR factory immediately.
2. Storage
Valves can be stored in any location, but should be kept dry, and not subject to any impact load or wear, while avoiding frost and direct sunlight. The storage temperature of the valve should not exceed its set temperature, and the recommended storage temperature is lower than 5~10°C. The valve can be stored at a low temperature, with a minimum temperature of -45°C, but drastic changes in the ambient temperature should be avoided. If it is necessary to increase its storage temperature, it is best to keep it slowly heated.
3. Installation
ENKAIR temperature control valve can be installed vertically, horizontally or at any Angle. The following four are the most commonly used installation diagrams of ENKAIR temperature control valves.
If the valve is to be installed at the highest point of the system, the system should be vented to prevent cavitation.
A zinc or magnesium block shall be placed at the inlet of the temperature control valve if electrolysis is used in the system.
If the medium inside the temperature control valve is sea water, the valve must be made of copper to prevent corrosion.
If the valve is connected with threads it is recommended to use thread sealant to prevent leakage.
If the valve is connected in a flanged manner, monolithic gaskets are recommended to prevent leakage.
In addition, ensure that the valve end face is securely connected to the pipe to avoid pipe deformation and load on the temperature control valve.
4. Operation
After the temperature control valve is installed, the system temperature should be monitored to ensure its normal operation when it begins to run.
Water cooling systems usually operate at or slightly below the set temperature, while oil cooling systems or other more viscous liquids usually operate at or slightly above the set temperature.
If the monitoring system temperature is higher than the full open temperature of 2.8°C, it needs to be paid attention to and find out the specific cause. If the monitoring temperature is higher than the full open temperature of 5.5°C, it should stop operation immediately, find out the cause and carry out the necessary maintenance.
5. Diagnosis
The main causes of temperature control valve failures are summarized as follows, which can be referred to for inquiry
System Temperature Too Cold
1. Insufficient heat transferred to coolant to maintain temperature.
2. Wrong nominal element temperature selected.
3. Thermostatic valve greatly oversized or cooling capacity of system much greater than required.
4. Thermostatic valve installed backwards, thus sending water to cooler at low temperatures.
5. Worn or leaking O-rings allowing leakage to cooler.
6. Excessive pressure drops across the valve.
7. Foreign matter preventing closure of elements.
8. Bi-metallic type thermometers will indicate low if calibrated in oil.
System Temperature Too Hot
1. Cooling capacity of system inadequate
2. Thermostatic valve too small for flow rate causing high pressure drops and possible cavitation problems.
3. Valve installed backwards, reducing flow to cooler as temperature increases.
4. By-pass will not close due to worn or pitted seats, sliding valve, seals, etc.
5. Elements may have suffered sufficient over-temperature to prevent full movement, thus preventing full cooling.
6. Solids building up on element sliding valve preventing correct operation.
7. Foreign matter stuck between sliding valve and seat.
