For the shut-off valve, not only will it be installed and maintained, but it will also operate. To open and close the shut-off valve, the force should be stable and not impact. Some components of the high pressure shut-off valve that have been opened and closed have been considered such that the impact force is not equivalent to a general globe valve. When the shut-off valve is fully open, the handwheel should be reversed a little to make the threads tightly tight to avoid loose damage. When the pipeline is used initially, there is a lot of internal dirt. The shut-off valve can be slightly opened, and the high-speed flow of the medium is used to wash it away, and then it is gently closed (cannot be closed quickly and violently closed to prevent residual impurities from pinching the sealing surface) , turn it on again, repeat this many times, flush the dirt, and put it into normal work. Normally open the shut-off valve, the sealing surface may be stuck with dirt, and when it is closed, it should be washed clean by the above method, and then officially closed. If the handwheel or handle is damaged or lost, it should be immediately equipped. It should not be replaced by a live wrench, so as not to damage the valve stem, and the opening and closing is not working, resulting in an accident in production. Some media, after the shut-off valve is closed, cool, so that the valve member shrinks, the operator should close again at the appropriate time, so that the sealing surface does not leave a slit, otherwise the medium flows through the slit at high speed, it is easy to erode the seal. surface. When operating, if you find that the operation is too laborious, you should analyze the cause. If the packing is too tight, it can be properly relaxed. If the valve stem is skewed, the person should be notified to repair it. In some closed valves, the closing member is heated and expanded, which makes opening difficult; if it must be opened at this time, the bonnet thread can be loosened half a turn to one turn, the stem stress is eliminated, and then the hand wheel is driven. Quick Assembling Aluminium Profiles What are the advantages of Quick Assembling Aluminium Profiles Quick Assembling Aluminium Profiles,Profile For Kitchen Cabinets,Cabinet Easy Aluminium Profile,Quick-Assembling Aluminium Profile GuangDong XinCheng Material CO.,LTD , https://www.xin-alu.com
1. Waterproof
The aluminum profile of the cabinet door is made of aluminum alloy frame inlaid with crystal steel plate. The aluminum alloy profile, ABS plastic parts and crystal steel plate are bubble resistant materials. Therefore, the aluminum profile of the cabinet door provides 50 years of waterproof guarantee, which can be directly washed and soaked with water.
2. Fire prevention
The aluminum profile of cabinet door has strong heat resistance. The test shows that it can withstand the temperature difference of 200 ℃ without damage. Even if the whole piece is placed on it after being ignited, its surface will not be damaged after burning for a long time, which overcomes the disadvantage that ordinary plates can not stand burning.
3. Insect and ant prevention
The aluminum profile of the cabinet door is extremely hard, and even termites have nothing to do.
4. Impact resistance
The aluminum profile of cabinet door has strong impact resistance. The experiment shows that it can withstand the test of 227g steel ball falling from 3m without damage, and the bending strength is 150MPa.
5. Wear resistance
The surface of aluminum profile of cabinet door is not damaged by knife cutting. It can be used under normal conditions for 50 years.