Talking about the turbine oil injection solenoid valve coil MFZ6-90YC, although this thing is small, if there is a problem, it will be a big trouble. In the power plant, the health of this solenoid valve coil is directly related to the safe operation of the turbine. Today, let’s talk about the safety problems that may be caused by the failure of the MFZ6-90YC coil from the perspective of power plant engineers, and how to deal with it.

The role of the MFZ6-90YC coil: the lifeblood of the oil injection system

The turbine’s turning gear is used to rotate the turbine shaft system to ensure that the shaft system is evenly heated or cooled. During the turning process, lubricating oil needs to be injected into the bearing, and the MFZ6-90YC solenoid valve is the key to controlling the flow of this lubricating oil. After the solenoid valve coil is energized, a magnetic field is generated to attract the valve core to move, open or close the oil circuit, and ensure accurate supply of lubricating oil. Once the coil fails, the solenoid valve loses control, which may cause interruption or excessive supply of lubricating oil, leading to a series of safety problems.

Failure Cause Analysis: Challenges of Both Internal and External Repair

The failure of the MFZ6-90YC coil may have many reasons, but they can be divided into two categories: internal failure and external environmental influence. Internal failures include short circuit, open circuit or insulation aging of the coil winding, which are usually caused by manufacturing defects or natural wear after long-term use. External environmental influences involve factors such as high temperature, humidity, and vibration, which may accelerate the aging of the coil and reduce its performance.

When the MFZ6-90YC coil fails, the first problem is the lubricating oil supply problem of the turning system. If the lubricating oil supply is interrupted, the bearings and journals may be damaged due to dry friction, which may cause the shaft system to bend or even get stuck in severe cases, which will not only cause huge economic losses, but also may cause serious safety accidents. On the other hand, if the lubricating oil supply is excessive, it may cause oil overflow or even fire. In addition, abnormal operation of the turning system may also affect the hot start of the turbine, prolong downtime, and increase operating costs.

Although the failure of the turbine oil injection solenoid valve coil MFZ6-90YC is only a small probability event, its potential safety risks cannot be ignored. For power plant engineers, it is key to take precautions and respond in advance. Strengthen daily inspections and maintenance to improve the reliability of the coil. Once a potential problem is found in the coil, it should be replaced immediately to avoid failure. In addition, improving the working environment of the solenoid valve and reducing the impact of high temperature, humidity and vibration are also effective measures to increase the life of the coil.
Yoyik offers various types of valves and pumps and its spare parts for power plants:
Servo valve for turbine regulation and security SM4-20(15)57-80/40-10-H607H
oil sealed rotary vacuum pump working principle P-1825
servo valve D633-199
MSV actuator test solenoid valve 22FDA-F5T-W220R-20
Oring A156.33.01.10-18X2.4
Automatic Air Release Valve A.R.I DG-10
High pressure Bladder for hydraulic accumulator NXQ-A-10/31.5-L-EH
straight stop shut off valve WJ50F1.6P
Cooling fan YB2-132M-4
Cooling fan YX3-160M2-2
Actuator Seal Kit A2201 for dome valve DN100 A2201
Globe valve KFWJ25F1.6P
SERVO VALVE SM4-20 (15)57-80/40-10-H607H
accumulator seal kit AB25/31.5-L-E
MOOG Valve D661-4786
stainless needle valve SHV20
Seal Kit NXQ-A-1.6/20-H-HT
Inflatable seal- dome valve 200DV (silicone) Poids net 0, 445 P17460C-01
Blet 1400*7330
Hydrogen emission main valve PTFE valve core WJ61-F