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About UsTianjin Nuclear Technology Industrial Co., Ltd. was established in 2010. It is a national high-tech enterprise integrating R & D, design, manufacturing and sales of industrial valves.
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ProductsThe company mainly produces GB, ANSI/API, JIS, DIN, BS, NF and other standards of control valve, ball valve, gate valve, globe valve, check valve, power station valve, butterfly valve and other related products.
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NewsIn line with the principle of "science and technology for development, quality to create brand", the company actively introduces high, new and cutting-edge technology at home and abroad, and sincerely works hand in hand with friends from all walks of life for mutual benefit and win-win, and create brilliance together!
News
How to choose the valve in the water supply network
Release time:
25 Oct,2023
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The water supply network is composed of various pipe accessories and fittings such as pipes and valves. According to a variety of different needs (water pipe network, water pressure scheduling and deployment, maintenance and repair of water needs, new and old pipeline connection, pipeline flushing, etc.), every day to open and close the valve. The service life and quality of the valve determine the normal operation of the pipe network, and play an important role in the pipe network, so we must attach great importance to it.
Since the pipe network is a bridge connecting the water supply enterprises and the vast number of users, it can be said that the quality of the management of a water supply enterprise is reflected in the normal operation of the pipe network, and the normal operation of the water supply network is closely related to the life and quality of the valve.
Safety of water supply
Does not affect the water quality is an important indicator of the valve selection. The part of the valve that directly contacts the water is mainly the inside of the valve body, the sealing part, the valve plate, etc. At present, the sealing part of the valve produced by many manufacturers is made of rubber material. Commonly used rubber materials are nitrile rubber (NBR), chloroprene rubber (CR) or ethylene propylene rubber (EPDM). These rubbers are synthetic rubber. During the synthesis process, more than ten kinds of raw materials and additives such as anti-aging agents are added to the natural rubber. *** Whether the final synthetic rubber can be used for the sealing of water supply valves depends on whether the rubber is non-toxic and meets the sanitary standards for drinking water. As for the inside of the valve and the valve plate and other parts, many manufacturers used to paint the method, only consider the problem of rust, without considering whether it is toxic. In practice, we found that: in the water supply network, the anti-corrosion problem of the pipeline lining has been solved, while the pipe network valve has no lining. Due to the precipitation of water and the erosion and deposition of iron bacteria in the valve cavity and valve plate, some of the inner wall of the valve body has a hilly accumulation phenomenon. Not only affects the water quality, but also some of the main reasons for the valve is not strict. Therefore, we require that these parts in direct contact with water should be sprayed with non-toxic paint, and the best method is to spray non-toxic epoxy powder by electrostatic spraying. When we choose the valve, we should first check whether there is a non-toxic certificate and inspection certificate of rubber and paint. Only the valve with the above conditions can ensure that the water quality is not polluted and the safety of water supply.
the advancement of technology
The production technology of valves continues to develop, from old-fashioned gate valves to soft-sealed gate valves, from butterfly valves at the beginning of the year to wafer butterfly valves, single eccentric and double eccentric flange butterfly valves, hard-sealed butterfly valves, from traditional single-headed exhaust valves to high-speed double-orifice exhaust valves, etc. Therefore, the selection of the valve should also take into account the advanced nature of the selected valve. However, in the application of new technologies, we are opposed to indiscriminate, do not understand the actual user, the practice of rushing, but should combine new technologies, new processes and user needs. Good valve is to be in the production of practical applications, from the direct needs of users. For example: resin extrusion sealing method, although from the design ideas and factory tests to prove that it does have advantages. However, in actual use, due to the resin material, the extrusion resin tool, etc., did not solve the user how to use the problem. Users in the use of this valve, it can not appreciate the advanced nature of this valve, characteristics and advantages, and as an ordinary butterfly valve use. Therefore, the valve production should not only pay attention to its advanced nature, but also pay attention to its practicality. And pay attention to solve the problems in practical applications, such as: exhaust valve float material, float shape (spherical or cylindrical) on the exhaust effect and service life of how to study. How to prevent the operation control (closing overposition) of worm gear butterfly valve, the top-breaking problem of gearbox box, the marking problem of switch indication, etc. Therefore, the choice of valve must pay attention to its advanced technology and practicality.
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