Requirements 1. Solar water heater valves should be stored in a dry and ventilated room, and both ends of the passage should be blocked. 2. Solar water heater valves that are stored for a long time should be checked regularly, dirt should be removed, and anti-rust oil should be applied to the processed surface. 3. After installation, regular inspections should be carried out, and the main inspection items are: (1) Wear of the sealing surface. (2) Wear of the trapezoidal threads of the Solar water heater valve stem and the Solar water heater valve stem nut. (3) Whether the packing is outdated and invalid. If damaged, it should be replaced in time. (4) After the Solar water heater valve is repaired and assembled, a sealing performance test should be carried out. For Solar water heater valves in operation, all Solar water heater valve parts should be complete and intact. The bolts on the flange and bracket are indispensable, and the threads should be intact and no looseness is allowed. If the fastening nut on the handwheel is found to be loose, it should be tightened in time to avoid wear of the connection or loss of the handwheel and nameplate. If the handwheel is lost, it is not allowed to be replaced with an adjustable wrench, and it should be replaced in time. The packing gland is not allowed to be skewed or have no pre-tightening clearance. For Solar water heater valves in environments that are easily contaminated by rain, snow, dust, wind and sand, etc., the Solar water heater valve stem should be equipped with a protective cover. The scale on the Solar water heater valve should be kept complete, accurate and clear. The Solar water heater valve's lead seal, cap, pneumatic accessories, etc. should be complete and intact. The insulation jacket should be free of dents and cracks. It is not allowed to knock, stand or support heavy objects on the running Solar water heater valve; especially non-metallic Solar water heater valves and cast iron Solar water heater valves, which should be prohibited. Grease injection maintenance: The professional Solar water heater valve maintenance work before welding, before production and after production plays a vital role in the Solar water heater valve's service in production and operation. Correct, orderly and effective maintenance will protect the Solar water heater valve, make the Solar water heater valve function normally and extend the Solar water heater valve's service life. Solar water heater valve maintenance work seems simple, but it is not. There are often neglected aspects in the work. First, when greasing the Solar water heater valve, the amount of grease injection is often ignored. After the grease gun is refueled, the operator selects the Solar water heater valve and grease injection connection method, and then performs the grease injection operation. There are two situations: on the one hand, the amount of grease injection is small and the grease injection is insufficient, and the sealing surface wears faster due to lack of lubricant. On the other hand, excessive grease injection causes waste. It is because the sealing capacity of different Solar water heater valves is not accurately calculated according to the Solar water heater valve type category. The sealing capacity can be calculated according to the Solar water heater valve size and category, and then the appropriate amount of grease can be reasonably injected. Second, when greasing the Solar water heater valve, the pressure problem is often ignored. During the greasing operation, the greasing pressure changes regularly in peaks and valleys. If the pressure is too low, the seal will leak or fail; if the pressure is too high, the greasing port will be blocked, the grease in the seal will harden, or the seal ring will be locked with the Solar water heater valve ball and Solar water heater valve plate. Usually, when the greasing pressure is too low, the injected grease will flow into the bottom of the Solar water heater valve cavity, which usually happens in small gate Solar water heater valves. If the greasing pressure is too high, on the one hand, check the greasing nozzle. If the grease hole is blocked, replace it according to the situation; on the other hand, if the grease is hardened, use cleaning fluid to repeatedly soften the failed sealing grease and inject new grease to replace it. In addition, the seal model and seal material also affect the greasing pressure. Different seal forms have different greasing pressures. Generally, the greasing pressure of hard seals is higher than that of soft seals. Third, when greasing the Solar water heater valve, pay attention to the problem of the Solar water heater valve in the switch position. Ball Solar water heater valves are generally in the open position during maintenance, and closed maintenance is selected in special circumstances. Other Solar water heater valves cannot be treated as open. The gate Solar water heater valve must be in a closed state during maintenance to ensure that the grease fills the sealing groove along the sealing ring. If it is open, the sealing grease will directly fall into the flow channel or Solar water heater valve cavity, causing waste. Fourth, when greasing the Solar water heater valve, the grease injection effect is often ignored. The pressure, grease injection amount, and switch position are normal during the grease injection operation. However, in order to ensure the Solar water heater valve grease injection effect, it is sometimes necessary to open or close the Solar water heater valve to check the lubrication effect and confirm that the Solar water heater valve ball or gate surface is evenly lubricated. Fifth, when greasing, pay attention to the Solar water heater valve body drainage and screw plug pressure relief. After the Solar water heater valve pressure test, the gas and moisture in the sealing cavity Solar water heater valve cavity increase due to the increase in ambient temperature. When greasing, drain and pressure relief must be performed first to facilitate the smooth progress of greasing. After greasing, the air and moisture in the sealing cavity are fully replaced. Timely release of Solar water heater valve cavity pressure also ensures the safety of Solar water heater valve use. After greasing, be sure to tighten the drainage and pressure relief screw plugs to prevent accidents. Sixth, when greasing, pay attention to the problem of uniform grease output. During normal grease injection, the grease outlet closest to the grease injection port will first be greased, then to the low point, and finally to the high point, and the grease will be discharged one by one. If it is not regular or does not discharge grease, it proves that there is a blockage and it should be cleared in time. Seventh, when injecting grease, you should also observe the flushing of the Solar water heater valve diameter and the sealing ring seat. For example, if there is an interference in the opening position of the ball Solar water heater valve, you can adjust the opening limiter inward and lock it after confirming that the diameter is straight. When adjusting the limit, you should not only pursue the opening or closing position, but also consider the overall situation. If the opening position is flush and the closing position is not in place, the Solar water heater valve will not be closed tightly. Similarly, when adjusting the closing position, you should also consider the corresponding adjustment of the opening position. Ensure the right-angle stroke of the Solar water heater valve. Eighth, after injecting grease, be sure to seal the grease injection port. Avoid impurities from entering or lipid oxidation at the grease injection port, and apply anti-rust grease to the cap to avoid rust. So that it can be used in the next operation. Ninth, when injecting grease, you should also consider specific problems in the future oil product sequential transportation. In view of the different qualities of diesel and gasoline, the flushing and decomposition capabilities of gasoline should be considered. In the future, when the Solar water heater valve is operated in the gasoline section, add grease in time to prevent wear. Tenth, when injecting grease, do not ignore the injection of grease on the Solar water heater valve stem. There are sliding sleeves or packings on the Solar water heater valve shaft, which also need to be lubricated to reduce the friction resistance during operation. If lubrication cannot be ensured, the torque will increase during electric operation and the parts will be worn, and it will be difficult to switch when manually operated. Eleventh, some ball Solar water heater valves are marked with arrows on the Solar water heater valve body. If there is no English FIOW handwriting, it is the direction of the sealing seat, not as a reference for the flow direction of the medium, and the Solar water heater valve self-drain direction is opposite. Under normal circumstances, the double-seat sealed ball Solar water heater valve has a two-way flow direction. Twelfth, when maintaining the Solar water heater valve, you should also pay attention to the problem of water ingress in the electric head and its transmission mechanism. Especially the rainwater that penetrates in the rainy season. One is to rust the transmission mechanism or transmission sleeve, and the other is freezing in winter. The torque is too large when the electric Solar water heater valve is operated, and the damage to the transmission components will cause the motor to be unloaded or the over-torque protection to trip and cannot realize electric operation. The transmission components are damaged, and manual operation cannot be performed. After the over-torque protection is activated, manual operation cannot be switched on and off. If forced operation is performed, the internal alloy components will be damaged.
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