Valve technical | electric valve pneumatic ball valve technical specification of special operation have
This procedure can be used for routine maintenance and repair of natural gas electric valves of pipelines in Southwest region of China Crude Oil. 2.1 Before operating the valve, read the operation instructions carefully. 2.2 Before operation, it is necessary to make clear the gas inflow and carefully check the valve opening and closing mark. 2.3 Check the appearance of the electric regulating valve to see whether the electric valve is damp. If there is damp, it needs to be solved. If any problems are found, handle them properly. Do not perform common operations. 2.4 For the electric device that has stopped using for more than 3 months, check the clutch before operation, and confirm that the rocker is in the manual position, and then check
Application field
This procedure can be used for routine maintenance and repair of natural gas electric valves in Southwest pipeline of China Crude Oil.
2. Prepare for machine and equipment operation
2.1 Before operating the valve, read the operation instructions carefully.
2.2 Before operation, it is necessary to make clear the gas inflow and carefully check the valve opening and closing mark.
2.3 Check the appearance of the electric regulating valve to see whether the electric valve is damp. If there is damp, it needs to be solved. If any problems are found, handle them properly. Do not perform common operations.
2.4 For electric devices that have not been used for more than 3 months, check the clutch before operation, confirm the position of the rocker in manual mode, and then check the insulation layer, conversion and distribution line of the motor.
3. Operation technical specifications
3.1 During operation, make sure that the clutch rocker is in the corresponding position.
3.2 If the electric regulating valve is operated in the main control room, set the switching switch to the REMOTE position, and then use the SCADA automatic control system to control the power switch of the electric regulating valve.
3.3 If you operate manually, set the switch to the LOCAL position and operate the power switch of the electric regulating valve nearby. If the electric regulating valve is opened in time or closed carefully, it will automatically stop working and put the operation switching switch into the center position.
3.4 When choosing to operate the valve on the spot, the opening and closing mark of the valve and the running condition of the valve seat should be monitored, and the opening and closing degree of the valve should meet the regulations.
3.5 When the valve is fully closed by on-site operation, the electric closing valve should be stopped before the valve is closed in time, and the valve should be closed in time by the shaft body.
3.6 After setting the value of the stroke and over-torque control board of the valve, when opening or closing the valve, it is necessary to pay attention to the monitoring of the stroke control condition, such as the valve power switch to the position does not stop, should immediately manually emergency stop 3.7 in the opening and closing of the valve, if the indicator is found to be incorrect, abnormal sound of the valve, it is necessary to shut down and check in time.
3.8 The switching power supply of the electric valve should be turned off after successful operation.
3.9 When operating several valves at the same time, it is necessary to pay attention to the operation sequence and comply with the production process.
3.10 When opening a large size valve with a by-pass valve, if the pressure difference between the two ends is large, the intake valve should be opened to change the pressure and the distribution valve should be reopened: when the distribution valve is opened, the intake valve should be turned off immediately.
3.11 When receiving the pigging ball (device), the gate valve through it must be opened.
3.12 The operation of gate valve, stop valve, stop valve and disc valve can only be opened or closed, and it is forbidden to be used for control.
3.13 In the operation of stop valve, stop valve and plate valve, when closing or opening to the upper fixed point or the lower dead point, it should be rotated 1/2 ~ 1 turn.
4. Daily maintenance of electric valves:
4.1 Routine Maintenance and Common Problems of Electrodynamic Valves Refer to Technical Specifications for Manual Ball Valve Operation for corresponding details. Routine maintenance of electrodynamic valves is as follows:
No. Maintenance Cycle Maintenance Specific Content Maintenance Specification Remarks Name 1 Quarterly maintenance of electric devices and automatic control systems (including travel switch, torque limited power switch, dashboard and remote control function, etc.) Carry out safety inspection, assessment and adjustment to ensure the normal operation of valves check that the oil level of drive system reducer is maintained at the required position of the grounding wire resistance ≥10 Ω
4.2 Before cleaning or servicing electric valves, switch power related to maintenance valves should be disconnected.
5, electric valve common problems, causes and treatment methods
Common Faults of the oil circuit board Refer to the common faults, causes, and solutions of manual ball valves
No. Fault Symptom Solution 1 The valve is not moved 1. The clutch is not electrically activated or damaged 2. The motor volume is small, the motor load 3. The filling material is pressed tight or slanted 4. The valve stem nut is embroidered or stuck with dirt 5. The rotating shaft and other rotating parts are stuck with the coat 6. The low pressure on both sides of the valve 7. The wedge gate valve is closed too tightly due to heat deformation 8. The torque is too large 1. Rotate the clutch in the electric part or replace the clutch. 2. Replan the filler cover 4. Fill the dirt and grease the stem nut for anti-rust treatment 5. Adjust the rotating parts such as the rotating shaft 6. Open the intake valve 7. The wedge gate valve is too tight when it is heated and deformed 8. Adjust the torque 2 The motor does not rotate 1. Common faults of the electrical control system 2. The power switch is invalid or the power switch exceeds the torque 3. Check the power distribution line. 2. Switch on the power again. 3. Manually control the valve. The travel control board is not adjusted 2. There is dirt in the gate valve slot of the globe valve or the gate valve falls down 3. Gate valve and cut-off valve surface damage 1. Replan the travel control board 2. Dirt, assemble gate valve 3. Change the sealing ring 4 valve travel start and stop parts change 1. Travel nut tightening pin loose 2. The rotating shaft and other rotating parts are loose 3. The torsion spring of the travel control plate is too loose 1. The fixed travel nut is tight 2. Tighten the rotating shaft and other rotating parts 3. Adjust and replace the torsion spring of the new travel control board 5. The motor cannot stop at all
What is the special place of pneumatic ball valve with the expansion of the scope of application of pneumatic ball valve, the use of groups also have many different cultural and artistic levels of people. Therefore, there are a lot of people on the pneumatic ball valve, the valve and the valve are not clear. Let’s take a look at the differences between them. Pneumatic ball valves (also known as two-position valves or cut-off valves) can be divided into air opening valves and air closing valves. To put it bluntly, the air opening valve means that the valve is opened when the air through the instrument rushes into the actuator
With the expansion of pneumatic ball valve application range, the use of groups also have many different cultural and artistic levels of people. Therefore, there are a lot of people on the pneumatic ball valve, the valve and the valve are not clear. Let’s take a look at the differences between them.
Pneumatic ball valves (also known as two-position valves or cut-off valves) can be divided into air opening valves and air closing valves.
To put it bluntly, the air opening valve means that the valve is opened when the air through the instrument rushes into the actuator; The valve closes when the actuator removes the instrument air from it. The air shutoff valve is the opposite.
Pneumatic ball valve often has two ways to open, because the process plan sometimes also produce the phenomenon of pneumatic valve common failure to disconnect, then according to the demand of the production process, some valves will open (such as emergency cut off valve), some valves to close (such as safety relief valve), so the designer in the process planning according to the demand and the use of gas open valve or gas close valve.
Post time: Mar-16-2023
