Maintenance
The maintenance
1. Precautions for use
1. It is recommended that the user assign special personnel to be responsible for, use and maintenance.
2, use the process of failure by our company designated special after-sales service personnel to provide on-site service, without our permission shall not be dismantled.
3, the solenoid valve should be repaired and maintained 1-2 times a year, to eliminate the dust, dirt and other impurities deposited, the replacement of o-ring and other wearing parts.
4. If the solenoid valve is stopped for a long time after installation, it should be operated for about 1 time in half a year and handled in time when problems are found.
5. Before maintenance, the power supply must be cut off and the medium pressure removed.
6, maintenance of the electromagnetic valve to be removed, should be by the use of the department of technical responsible person and our company's technical personnel after communication, under the guidance of our company's professional personnel.
7. When disassembling the solenoid valve for cleaning, all parts should be put in order, and interference fitting parts or bonding parts shall not be disassembled.
8. After being dismantled, metal parts and oil-resistant rubber parts can be cleaned with kerosene or trichloroethylene, and ordinary rubber parts and plastic parts can be wiped with clean cotton yarn.
9, installation according to the reverse order of disassembly, O ring outer circle and other parts of the contact surface coated with lubricating oil, not strong percussion. Be careful not to leak seals and fasteners.
10, the product in the use of abnormal sound, movement should stop working, immediately analyze the cause and take appropriate measures, do not make the equipment sick operation.
Two, solenoid valve fault analysis and processing
|
The fault phenomenon |
Cause analysis, |
Processing method |
|
No action when energized |
Poor contact of power cable
The coil is short-circuited or burnt out
Rectifier bridge breakdown
The power supply voltage variation exceeds the permitted range |
Connect the power cord
Replace the coil
Replace the rectifier bridge
Adjust voltage within normal working range |
|
When the valve is opened, the medium cannot pass or the flow is insufficient |
Medium pressure or working pressure difference is not consistent
There are impurities and dirt around the guide sleeve or moving iron core and the guide valve hole is blocked
Valve front strainer blocked
Before valve manual valve close or pressure box cut off valve overpressure cut off
The working frequency is too high
The diameter of design selection is too small |
Adjust the pressure or working pressure difference, select the appropriate pressure parameters of the product
Clean internal parts and install strainer before valve
Clean the filter screen
Before opening the valve manual valve, reset the pressure box cut-off valve
Change product specifications or replace new products
Replace with appropriate specifications and models
|
|
The medium can not be cut off when the valve is closed |
Medium pressure and working pressure difference are inconsistent
Fluid viscosity does not meet requirements
Seat defect or adhesion dirt
Balance hole or throttle hole is blocked
The spring deforms or comes out of the spring seat
The working frequency is too high |
Adjust the pressure or working pressure difference, select the appropriate pressure parameters of the product
Replace the appropriate product
Clean, grind or replace
Disassemble and clean internal parts
Add gasket, replace the spring, the spring in the spring seat reset
Replace the suitable specifications and models |
|
Emergency cut-off solenoid valve after closing the valve reset is not reliable |
Spring deformation
The stem limit card slot is damaged
The non-magnetic tube assembly is loose |
Add gasket or replace spring
Replace with a new stem
Tighten the thread of the non-magnetic tube assembly |
|
leakage |
The connection of the component is loose
The o-ring at the connection is damagedBody corrosion appears trachoma |
Tighten connection bolts or threads
Replace the O-ring sealRepair or replace new valve body with foundry glue |
|
Serious internal leakage |
Guide seat, main seat defective
Guide seat, main seat and disc surface impurities, dirt
Improper spring assembly or deformation
The valve disc fastening nut is loose
The moving iron core fastening nut is loose
Stem is bent and deformed |
Clean, grind or replace
Remove and clean seat and disc
Reassemble or replace the spring
Tighten the disc fastening nut
Tighten the moving core fastening nut
Replace with a new stem |
|
Too much noise during power on |
The fastener of the magnetic head is loose
The non-magnetic pipe fitting of the cut-off valve is loose
Medium pressure and working pressure difference are inconsistent
Fluid viscosity does not meet requirements
Voltage fluctuation exceeds allowable range |
Tighten the fastening bolt
Tighten the thread of the non-magnetic tube assembly
Adjust pressure, working pressure difference or replace suitable products
Replace the product with the appropriate model
Adjust voltage to normal working range |
The main products are gas emergency shut-off valves, gas alarms, insulating flanges for cathodic protection, insulating joints, gas pipeline safety self-closing valves, gas wall-hung boilers, lithium-ion batteries, etc.
Jinan Daqin Electromechanical Equipment Co., Ltd.
Headquarters address: Daqin Electromechanical Industrial Park, No. 2399, Tongfa Avenue, Changqing District, Jinan Economic Development Zone
technical consulting：0531－87239187
hotline：0531－87239187
holiday call：18560017828
E-mail：984274817@qq.com
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