1： The installation procedure for ball valves is crucial for ensuring long lifespan and satisfactory performance. Valves stored on site
Products waiting for installation should be stored in their original packaging, in dry conditions, and not damaged.
Before installation, it is important to follow the following basic procedures:
1. Carefully open the valve and check valve nameplates to identify the material.
2. Remove all packaging materials.
3. All valves are bi-directional and can be used at any time. Valves can be placed with the stem facing in any direction
4. Check if the valve has any flow indication markings. Appropriate precautions must be taken to install valves to ensure normal flow direction
5. According to ASME, inspect the interior of the valve through end ports to ensure cleanliness and absence of foreign objects
6. Ensure that all auxiliary connections (such as lubricators, drainage pipes, ventilation openings) are not damaged and tightened correctly.
7. Cycle the valve and check any features that have important functions.
8. Read all literature and pay attention to any special warning labels or tags on the valve.
Before installation, check to ensure that the valve ball is in the open position to prevent possible damage to the valve. The performance of the valve depends on its original condition. Do not partially open the valve at any stage
2. Threaded end valve
Valves with threaded ends should be treated as a separate unit and should not be disassembled when installed on pipelines.
Before installing the valve, ensure that the threads on the fitting pipe are free of excessive gravel, dirt, or burrs.
When tightening the valve, use a pipe wrench or wrench to connect the end joint closest to the operated pipeline in standard pipeline practice. Use an appropriate amount of connecting sealant material.
3 inline welded end valves
The welding of valves should be carried out by qualified personnel in accordance with Section IX of the ASME Boiler Structural Code
Valves welded within the European Union shall comply with the requirements of Pressure Equipment Directive 97/23/EC ESR 3.1.2.
Valves directly welded to pipelines must be in the open position to protect the ball and seat from excessive damage
The temperature during the welding process.
Protect or remove the actuator from welding spatter or arc impact. Valves in the 'fault closed' position should be cycled to
Open the position.
Allow water to flow freely through the drainage bottom valve and overflow through the exhaust valve to prevent all overheating
Through the welding process. Do not heat the central part above 150 ° C
Align the valve with the pipeline to ensure correct installation and minimize pipeline load. Only position welding.
Complete welding in sections. Leave sufficient cooling time between each segment.
Do not turn the valve before flushing the pipeline.
4 flange end valves
Valves with flanged ends should be treated as a separate unit and should not be disassembled when installed on pipelines.
Before installing the valve, ensure that the flange on the fitting pipe is free of excessive gravel, dirt, or burrs, and that the flange on the pipeline is not mechanically damaged.
When inserting flange bolts, ensure that the bolt size is correct to withstand pressure and axial force
5 Maintenance:
It is recommended to perform general control on the valve every 2 years of operation or every 5.000 opening and closing cycles.
Remove the valve from the pipeline before or during any maintenance or cleaning adjustments.
Attention: Before disconnecting, check if there is a power supply for electric, pneumatic, or hydraulic actuators.