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What devices do we need to pay attention to when we are in the installation of pneumatic valves?


Release time:

2022-02-26

Wuxi Xinming automatic control valve industry to introduce us to the devicePneumatic valveIt is necessary to pay attention to which devices are maintained.

What devices do we need to pay attention to when we are in the installation of pneumatic valves?

Wuxi Xinming automatic control valve industry to introduce us to the devicePneumatic valveIt is necessary to pay attention to which devices are maintained.
Pneumatic Valve Orientation and Orientation Many valves are directional. The valve chamber of the stop valve is asymmetrical. Therefore, the liquid should pass through the valve port from bottom to top, so that the fluid resistance is very small (shape), open and save labor (because of the medium pressure), and after packaging, simple maintenance, this is Why can't the stop valve be installed. Other valves also have their own characteristics.
The position of the valve device is necessary to facilitate operation, even if the device has temporary difficulties, but also to take into account the long-term work of the operator. Z It is good to place the valve handwheel and the box body (generally 1.2 meters apart from the console) to make the valve relatively simple to open and close. Grounding valve hand wheel should be upward, do not tilt, so as to avoid stupid operation. The valve of the wall-mounted machine should depend on the equipment, but also leave room for the operator to stand. Prevent operation in the sky, especially in acid and alkali, toxic media, otherwise it is very unsafe.
When lifting the valve during the installation process, the rope should not be tied to the handwheel or valve stem to avoid damage to these components, but should be tied to the flange. Be sure to clean the pipe connected to the valve. Use tight air to blow away iron oxide, sand, welding slag and other debris. These debris, not only simply scratch the valve sealing surface, including large particles of debris (such as welding slag), but also block the small valve, so that its failure. When the screw valve is mounted, the sealing packing (thread and aluminum oil or PTFE material tape) should be wound on the pipe thread, and do not contact with the valve, so as not to affect the valve recall product and affect the activity of the medium. Bolts shall be tightened symmetrically and evenly when flange valves are mounted. It is necessary for the valve flange to be parallel to the pipe flange, and the gap is reasonable to prevent excessive valve pressure or even cracking. Special attention should be paid to brittle materials and low strength valves. The valve welded with the pipeline shall be spot welded first, then fully open and fully closed, and then welded to death.
SomePneumatic valveExternal maintenance is also required, I .e. insulation and cooling. Sometimes a hot steam line is added to the insulation layer. Which kind of valve should be heat preservation or cooling, according to the production requirements. In principle, if the temperature of the valve medium drops too much, it will affect the production efficiency of the valve or freeze, and require heat preservation and uniform heat dissipation; when the valve is exposed, it is not conducive to production or cause frost and other undesirable phenomena, it is necessary to prevent cold. Insulation materials are asbestos, slag wool, glass wool, perlite, diatomite, vermiculite and so on. Cold storage materials are cork, perlite, foam, plastic and so on. Bypass and meter In addition to the necessary maintenance, some valves have bypass and pressure gauge. Device bypass. Simple maintenance of the snare. Other valves also use bypass mode device. The bypass device depends on the condition, importance and production requirements of the valve. Replacement of packaging, feeding valve, some packing is not good, some do not cooperate with the medium, the need to replace the packing. When replacing the packing, press all the way in. Each ring joint cooperates 45 degrees, and the ring and ring are 180 degrees apart. The height of the packing shall allow further tightening of the gland. The lower part of the gland should now be pressed to the appropriate depth of the filling cavity, generally to 10-20% of the total depth of the filling cavity. For more demanding valves, the slit angle is 30 degrees. The joints between the rings are interwoven at 120 degrees.
The above is Wuxi Xinming automatic control valve industry to introduce the relevant content.




 

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