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2023-07-11 0 Views

Analysis of the maintenance of a V ball valve

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;BIWTextile Testing Instruments, Testing Equipment Manufacturer

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;BIWTextile Testing Instruments, Testing Equipment Manufacturer


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. BIWTextile Testing Instruments, Testing Equipment Manufacturer


Let's introduce the maintenance and assembly steps of the V ball valveBIWTextile Testing Instruments, Testing Equipment Manufacturer


1. Cleaning the V ball valve;BIWTextile Testing Instruments, Testing Equipment Manufacturer


To overhaul theremoved from the process line, all parts impregnated with the process medium must be cleaned. To avoid corrosive or other harmful liquids causing loss of people and equipment. At the same time, the rust on the exposed surface of the parts should be removed.

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2. V-type ball valve disassembly;BIWTextile Testing Instruments, Testing Equipment Manufacturer


To inspect all parts and determine the scope of repair and replacement. First, the actuator and valve should be completely disassembled. BIWTextile Testing Instruments, Testing Equipment Manufacturer


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. BIWTextile Testing Instruments, Testing Equipment Manufacturer


3. Overhaul of the main parts;BIWTextile Testing Instruments, Testing Equipment Manufacturer


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. BIWTextile Testing Instruments, Testing Equipment Manufacturer


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. BIWTextile Testing Instruments, Testing Equipment Manufacturer


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. BIWTextile Testing Instruments, Testing Equipment Manufacturer


During the overhaul of the compression spring, cracks and other defects that affect its strength are found. must be replaced with a new one. BIWTextile Testing Instruments, Testing Equipment Manufacturer


4. Replacement of wearing parts; V-shaped ball valves are mainly prone to: BIWTextile Testing Instruments, Testing Equipment Manufacturer


Packing, O-ring, gasket, diaphragm parts and other parts. BIWTextile Testing Instruments, Testing Equipment Manufacturer


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. BIWTextile Testing Instruments, Testing Equipment Manufacturer


5. Assembling and debugging;BIWTextile Testing Instruments, Testing Equipment Manufacturer


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. BIWTextile Testing Instruments, Testing Equipment Manufacturer


In addition, special attention should be paid to the coaxiality of the push rod, valve core parts and valve seat throughout the machine. BIWTextile Testing Instruments, Testing Equipment Manufacturer

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