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Solenoid valve introduction and troubleshooting

Source: Unknown Author: admin Name: Time: 2019-12-21

I. Symptoms-Possible reasons for the solenoid valve not opening: 1. No voltage on the coil. 2 Incorrect voltage / frequency 3 Coil burning 4 Differential pressure too high 5 Differential pressure too low 6 Broken or bent armature tube 7 Clearance / impurity in piston 8 Impurity in valve seat 9 Impurity in armature / armature Impurities 10 Corrosion / cavitation 11 Discard the parts after disassembling the solenoid valve Troubleshooting: 1 Lift the solenoid valve coil, do you feel the resistance 2 Do not remove the coil from the valve when power is on, otherwise the coil may burn out. 3 Measure the working voltage of the coil based on the coil data and equipment data. Allow 10% higher than the extra voltage. 4 Check the connection coil and wiring itself, check relay contacts, wire connectors, fuses. 5 check the technical parameters and pressure difference of the solenoid valve. Replace the appropriate valve. 6 Look for clearances and / or piston rings. 7 Remove impurities, replace defective parts, or replace O-rings and gaskets. 2. Possible reasons for the solenoid valve to partially open: 1. Low dropout. The armature tube is damaged or bent. 3 After disassembling the solenoid valve, the separation / impurity valve seat in the mass of the piston 4 / impurity corrosion / air pocket 7 in the armature / armature tube 6 discard the parts. Troubleshooting: Check the check valve technical data and correct pressure. Replace the appropriate valve. Look for clearances and / or piston rings, replace O-rings and gaskets to remove impurities, replace defective parts, parts, or replace O-rings and gaskets. Possible reasons that the solenoid valve is not closed / partially closed: 1. The manual valve stem does not twist after use. 2. The coil continues to be energized. 3. There is a feeling in the exhaust pipe. When the azimuth 4 is flipped, the pressure difference is too high. The outlet pressure is sometimes higher than the inlet pressure. 5Armature tube is damaged or bent. 6 Defective valve plate, diaphragm or valve seat. 7 The diaphragm or support plate must not be round. 8. Impurities in the valve plate. Impurities in pilot holes. The impurities 9 in the armature tube are guided / corroded / cavitated in the main port: lift the solenoid valve coil to see if there is resistance. If the valve is energized, do not remove the coil from the valve, otherwise the coil may burn. Check the connection coil and the connection itself. Check relay contacts and wire connectors. Check the direction of the manual valve stem. Check the technical parameters of the solenoid valve. Check pressure and flow conditions and replace with appropriate valves. View the rest of the system. Remove impurities, replace defective parts, or replace o-rings and gaskets. 3. Possible causes of solenoid valve noise: 1. Frequency noise (hum) 2. Water hammer appeared when solenoid valve 3 was opened. Water hammer occurs when the solenoid valve 4 is closed. Excessive differential pressure in the discharge pipe and / or major malfunction eliminated: Solenoid valve is not a problem. Check the power supply, check the technical parameters of the solenoid valve, check the pressure and flow conditions to replace the appropriate valve, and check the rest of the system. Fourth, take-up burned (coil is very cold when power on) troubleshooting: check the coil data. If there is a suitable coil, it needs to be replaced. Check the wiring diagram or the wiring itself. Look at large voltage changes. Committed 10% higher than the extra voltage; 15% lower than the extra current to check for shorts in the rest of the system. Check the wire connector of the coil. After correcting the problem, replace the coil (to determine whether the voltage is correct) and check the O-ring and inner nut on the armature tube. Remove impurities, replace defective parts, parts, or replace o-rings and gaskets. Compare valve and coil data with equipment data. Replace the appropriate valve. Valve orientation may change. Compare valve and coil data. Increase valve and coil ventilation. Possible causes: 1 incorrect coil voltage / frequency 2 short circuit (probably due to the formation of moisture in the coil) 3 unable to raise the armature in the armature tube: the armature tube is damaged or bent; b armature is damaged; c armature tube Impurities in 4 Medium temperature is too high 5 Ambient temperature is too high 6 Damaged piston and piston ring (on EVRA servo control solenoid valve).

Solenoid pulse valve
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Company Address: Shenyang Tongteng Environmental Protection Industrial Co., Ltd.
Phone: 13898801113
Fax: 024-86724248
Email: tongtengshiye@163.com
Address: Building A, Shenghua Youth Street, Shenhe District, Shenyang