The V ball valve is a type of ball valve. Its closing part is a hemisphere with a V-shaped opening, and the V-shaped opening has a sharp edge;
When the ball rotates, there is a wiping effect between the closing parts, which has a cutting force exerted on the medium. The V-shaped opening of the ball and the flow channel of the valve seat form a fan-shaped area. During the rotation process, the cross-sectional area of the flow channel can be changed to adjust the shape of the medium;
It is an angle control valve, the sealing performance of which is the same as that of an ordinary ball valve, so it can use two at the same time has functions for controlling and switching. It is widely used in automatic control systems for industrial processes.
Let's introduce the maintenance and assembly steps of the V ball valve
1. Cleaning the V ball valve;
2. V-type ball valve disassembly;
To inspect all parts and determine the scope of repair and replacement. First, the actuator and valve should be completely disassembled.
When disassembling, it is necessary to protect the precision-machined surfaces of parts such as the valve core, valve seat, valve stem, tappet, bushing and all parts to prevent damage in order for maintenance to be possible To reduce costs, special tools should be used to disassemble the valve seat.
3. Overhaul of the main parts;
If small rust spots on the throttle surface of the valve core and the sealsurface of the valve are core and valve seat and wear. It can still be repaired by general machining and grinding methods.
In the event of serious damage, new parts must be replaced. When repairing, it is necessary to pay attention to the coaxiality of the valve core and valve seat. If the sealing surface of the valve stem is damaged, it can only be replaced with new parts.
Damage to the guide and sealing surfaces of the connecting rod. Reaction actuators must be replaced with new parts. However, proper repairs can still be made to the positive-locking actuators.
During the overhaul of the compression spring, cracks and other defects that affect its strength are found. must be replaced with a new one.
4. Replacement of wearing parts; V-shaped ball valves are mainly prone to:
Packing, O-ring, gasket, diaphragm parts and other parts.
Removed packing, O-rings and gaskets must be replaced with new ones at each service. After removing the membrane, it is necessary to check whether there are cracks, aging, etc. Check the signs of wear and then decide whether or not to replace it depending on the situation. In general, at most 2 to 3 years need to be replaced.
5. Assembling and debugging;
When assembling, in the positioning part, guide part, thread of the partsTo facilitate the next maintenance and disassembly, the connection parts should be provided with appropriate lubricating grease.
In addition, special attention should be paid to the coaxiality of the push rod, valve core parts and valve seat throughout the machine.