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Electric valves are generally divided into two types: normally closed and normally open, normally closed type means that the valve is in a closed state when the power is off, and the normally open type means that the valve is in the open state when the power is off; In addition, the wiring is also divided into three-wire and two-wire system, most of the large diameter is three-wire system, and the small diameter will have two kinds of two-wire and three-wire system.
The three-wire electric valve has three lines, F and N, F stands for forward action (or open action) control line, R stands for reverse action (or close action) control line, and N stands for ground line.
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Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:
The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.
First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.
These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.
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Material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8 (304), CF3 (304L), CF8M (316), Cf3M (316L), Ti
Nominal passage: DN50 DN350
Nominal pressure: applicable temperature: -46 500 jujube.
Drive mode: electric.
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Air, steam, water, gases, petroleum and petrochemicals, corrosive targeting media.
Electric ball valves are usually used in occasions with strict sealing requirements, in addition to controlling gas, liquid, steam media, but also suitable for controlling sewage and media containing fibrous impurities, widely used in petroleum, chemical industry, metallurgy, light industry, papermaking, power station, refrigeration and other work fields.
Electric ball valve is an important type of valve, which is widely used in petrochemical industry, long-distance pipelines and other fields. The closing part of the ball valve is a ball (or part of a ball) with a hole, and the ball rotates with the valve stem to realize the opening or closing of the valve.
Compared with gate valves and globe valves of the same specification, the ball valve has a small volume key and light weight, which is convenient for pipeline installation.
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1. Design and manufacture: GB12237-89, API608, API 6D, JPI 7S-48, BS5351, DIN3357.
2. Flange size: JB T74 90 (JB74 90), GB9112 9131, HGJ44 76, SH3406, ANSI B2212 2214, NF E29-211, DIN2543.
3. Structural length: GB12221-89, ANSI B2002, NF E29-305, DIN3202.
4. Inspection main test: JB T 9092, API 598.
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Motorized unit.
Working environment: ordinary type.
Does not contain corrosive ** gases.
Relative temperature: 60
Relative humidity: 90[%]25 hours).
3000m above sea level
Power supply pressure 220 frequency 50Hz
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