All kinds of commonly used valve seven maintenance methods small valve university asked: family commonly used valve purchase notice

All kinds of commonly used valve seven maintenance methods small valve university asked: family commonly used valve purchase notice

Valve in industrial production, life in all walks of life are very used, is the domestic water pipeline, industrial fluid pipeline indispensable device. As small as the household water pipe, as large as the Three Gorges Dam, Qinshan nuclear power plant, and even the Shenzhou series spacecraft and the International Space Station, valves play a vital role in the middle. So the use of the valve should pay attention to maintenance, the valve in the use of the process, should often keep clean, transmission thread must be regularly lubricated, found fault, should immediately stop using, find out the cause of the fault.
Valve in industrial production, life in all walks of life are very used, is the domestic water pipeline, industrial fluid pipeline indispensable device. As small as the household water pipe, as large as the Three Gorges Dam, Qinshan nuclear power plant, and even the Shenzhou series spacecraft and the International Space Station, valves play a vital role in the middle. So the valve should pay attention to maintenance, speaking of maintenance, do you know how to maintain the valve?
The seven maintenance methods of the valve are as follows:
1, the valve in the process of use, should often keep clean, transmission thread must be regularly lubricated, found fault, should immediately stop using, find out the cause of the fault.
2, packing gland bolts should be tightened evenly, should not be pressed into a crooked state, so as to avoid damage to hinder stem movement or cause leakage.
3. When installing, the valve can be directly installed on the pipe according to the connection mode. In GENERAL, IT CAN BE INSTALLED IN any position OF the pipeline, but it needs to be easy to operate the maintenance, pay attention to the flow of the globe valve medium should be under the longitudinal valve disc upward, lift check valve can only be installed horizontally.
4, butterfly valve, ball valve, globe valve, gate valve, only fully open or fully closed, do not allow to adjust the flow, so as to avoid the sealing surface erosion, accelerate wear. The gate valve and the upper thread globe valve have an inverted seal device, and the handwheel is turned to the top position to tighten it, which can prevent the media from leaking from the packing.
5, butterfly valve, ball valve, globe valve, gate valve open and close the application of handwheel, do not use levers or other tools, so as not to damage the valve parts. Turn the handwheel clockwise to close, vice versa to open.
6. Before installation, it is necessary to carefully check the pressure of the valve mark, whether the diameter meets the requirements of use, eliminate the defects caused by the transportation process, and eliminate the dirt of the valve.
7 valves, long-term storage, should be regularly check, for the leakage of the processing surface should be clean, dirt, storage and ends when the ball valve should be blocked in an open position, butterfly valve, gate valve, globe valve, check valve, the ends of the channel should be blocked and closed, neatly stored in indoor and ventilated dry place, do not heap or in open air.
Small valve university asked: family commonly used valve purchase notice when choosing to visually inspect the valve, the surface should be without trachoma; Electroplating surface should be uniform luster, must pay attention to whether there are peeling, cracking, singed, exposed bottom, peeling, black spots and obvious pitting defects; The spray surface should be fine, smooth and uniform, without defects such as flow hanging and exposed bottom. Civil valves are commonly used by ordinary families in the form of gate valves, ball valves, triangle valves, etc., generally made of iron or copper. Due to the good mechanical properties of copper alloy, it has the advantages of not easy to rust and strong corrosion resistance, so the copper valve has gradually replaced the iron valve
When the purchase of visual inspection valve, the surface should be free of trachoma; Electroplating surface should be uniform luster, must pay attention to whether there are peeling, cracking, singed, exposed bottom, peeling, black spots and obvious pitting defects; The spray surface should be fine, smooth and uniform, without defects such as flow hanging and exposed bottom.
Civil valves are commonly used by ordinary families in the form of gate valves, ball valves, triangle valves, etc., generally made of iron or copper.
Due to the good mechanical properties of copper alloy, it has the advantages of not easy to rust and strong corrosion resistance, so the copper valve has gradually replaced the iron valve. Triangle valve surface is basically using electroplating, its role is not only to control the flow of pipeline medium, but also to play a decorative role. The triangle valve is generally connected with pipes and water inlet hose for water nozzle, toilet water supply, and also connected with pipes and water inlet hose for water heater water supply.
Gate valves are basically used to connect pipes and water meters.
Ball valve for piping and water heater connection.
Because the ball valve opening and closing is more convenient than the gate valve, most of the pipes and water meters are connected by ball valves.
The purchase of civil valve:
Different types of civil valves should be selected according to the different requirements of users:
1. Visually inspect the valve when purchasing, and the surface should be free of trachoma; Electroplating surface should be uniform luster, must pay attention to whether there are peeling, cracking, singed, exposed bottom, peeling, black spots and obvious pitting defects; The spray surface should be fine, smooth and uniform, without defects such as flow hanging and exposed bottom. These defects will directly affect the service life of the valve.
2. The pipe thread of the valve is connected with pipeline, the apparent defect such as concave mark, broken tooth is observed on the surface of the thread when choose and buy, especially those who should notice is the screw of pipe thread and connector close effective length will affect the reliability of sealing, the effective length of pipe thread should notice when choose and buy. General DN15 cylinder pipe thread effective length in about 10mm.
3. Gate valves and ball valves are usually marked with nominal pressure on the valve body or handle, which can be selected according to their own needs.
4. When replacing the existing gate valve or ball valve, make sure that its structure length is clear so that it can not be installed after purchase.
5. Triangle valve pipe thread has two kinds of internal thread and external thread, according to the need to choose; What NOTICE EVEN IS THE TRIANGLE VALVE THAT THERE IS PARTIAL ZINC ALLOY TO MAKE ON THE MARKET AT PRESENT, THIS VALVE PRICE WANTS LOWER THAN GENERAL PRODUCT, BUT EASY CORROSION AND CAUSE FRACTURE.
Should BE IN AS FAR AS POSSIBLE FORMAL BUILDING MATERIALS STORE, SUPERMARKET CHOOSE AND BUY, SUCH PRODUCT QUALITY CAN ASSURE MORE.