As a key component of the self-cleaning filter to automatically remove impurities after cleaning the filter screen, the automatic drain valve plays a very important role in ensuring the stable operation of the self-cleaning filter. The automatic sewage valve of this filter can generally choose electric ball valves, electric butterfly valves, solenoid valves, hydraulic electromagnetic diaphragm valves and other types of valves. Some users often have the following types of problems in the process of using the self-cleaning filter, let's analyze them one by one.
After using the filter for a period of time, it is found that the automatic drain valve leaks or does not work-cause analysis:
1. When using ordinary solenoid valves, because domestic solenoid valves are generally pilot-operated solenoid valves, the pilot hole is a non-small hole (0.3-2mm), and the water passing through the drain valve is generally sewage containing a large amount of impurities. The hole is easily blocked by these impurities, and once the pilot hole is blocked, the diaphragm of the solenoid valve will not close tightly, resulting in water leakage from the drain valve. The solenoid coils of domestic solenoid valves generally have relatively large power (more than three times that of foreign equivalent products), high power means high heat generation, and large heat generation will affect the life of the solenoid coil. This is why the failure rate of ordinary domestic solenoid valves is used. high reason.
2. When using an electric ball valve: As we all know, the valve core of the electric ball valve is a rotating stainless steel sphere, which can be turned by the actuator to achieve the effect of opening and closing the valve. If there are many metal impurities and sand particles in the system, these impurities are easy to block the valve. Between the inner wall and the valve core, the action of the valve core is not in place or worn, resulting in water leakage of the electric ball valve.
3. In order to save costs, some manufacturers use electric butterfly valves as sewage valves. When the water quality of the water system is relatively poor and the frequency of self-cleaning filter cleaning and sewage discharge is relatively high, the seals of the electric butterfly valves are easy to wear and affect the closure of the valve. , resulting in water leakage.
Lifelt took the lead in choosing the Bolmett electromagnetic diaphragm valve imported from Israel as the automatic sewage valve of the filter on the self-cleaning filter. The Bolmett electromagnetic diaphragm valve has the advantages of low power consumption, compact appearance, stable and reliable operation, etc. . Due to the structure of the diaphragm valve, there is no problem that the pilot hole of the ordinary solenoid valve is blocked by impurities. The valve body itself has a filter cleaning system, and has manual, automatic and closing functions, thus ensuring continuity and stability under harsh working conditions sex.
