Pump truck accessory, electromagnetic reversing valve, is a kind of industrial control component used to control the medium speed, flow, direction and other parameters. In the normal use process, there will be loss, loss to a certain extent will cause the electromagnetic change valve can not work correctly.

Solenoid Pushrod Wear Becomes Shorter

The rod role in the solenoid is to push the core to move when the armature moves. The pushrod and the spool are not integrated. Therefore, in constant contact, is bound to produce wear. After long-term high-frequency switching, it is possible to wear out and become significantly shorter. At this time, the valve spool change is not in place, affecting the work of the electromagnetic change valve. Just replace the pushrod to solve the fault. Note that the size of the new pushrod should be consistent with the original fittings. 

Electromagnet Damage (burned)

Electromagnet burning is also one of the common faults of electromagnetic reversing valve. One of the reasons for the quality problems, such as the poor processing of the iron core, the wire material wire diameter standard is too low and easy to overheat. The fault caused by quality is usually visible in the electromagnetic reversing valve of the pump. For the coil failure after a period of work, most of them are caused by environmental reasons.

Wear of The Core Outer Diameter

This is the same as the wear of the holes in the valve. Especially for the oil contains too much impurities, will aggravate the wear of the electromagnetic change valve spool. Although this kind of wear can not be completely avoided, but to extend the service life of the electromagnetic change valve, and maintain a good working state, should regularly check the hydraulic oil cleanliness, and timely treatment of excessive hydraulic oil pollution. Three-wing electromagnetic change valve core unique material, compared with the ordinary electromagnetic change valve core has better wear resistance, so the life is greatly strengthened.

Return The Spring To Fatigue Or Break

This kind of fault is related to the material selection of the spring. The electromagnetic reversing valve uses the imported steel wire spring, the surface is dyed black treatment, has good elasticity, fatigue resistance characteristics. The strengthening of the surface treatment process can effectively prevent the spring from being corroded and has a high service life. When encountering such failure, both springs must be replaced at the same time, and attention should be paid that the length matches the design value of the electromagnetic reversing valve. 

The Body Hole Of The Valve Is Worn

The frequent round and forth movement between the valve core and the hole in the valve, although the electromagnetic reversing valve core design oil tank, can maximize the contact surface full with oil, reduce friction, but according to the working nature of the electromagnetic reversing valve, the wear of the hole in the electromagnetic reversing valve valve is still not completely avoided. The solenoid valve body is made of ductile cast iron, different from the ordinary electromagnetic reversing valve, the three wings use a unique raw material ratio to strengthen the hardness of the valve body, which delays the wear and the deformation of the hole in the valve body to a certain extent. The wear of the holes in the valve can be repaired or replaced as required. When replacing, attention should be paid to whether the new valve body can match with the components related to the original electromagnetic reversing valve, such as the solenoid tube, sealing ring, etc.

Uncommon problems

The above is the most common problem of the electromagnetic reversing valve, it may also be some other uncommon problems, such as voltage, current instability, a large impact fluctuations, and lead to burning. And according to the working principle of the solenoid, when the electromagnetic change valve spool stuck, and lead to the solenoid power after the armature can not move in place, the coil temperature will rise sharply, and easy to lead to a short time burned, this kind of fault accounts for the majority of the solenoid valve coil failure.