1. Determine the DN size according to the size of the inner diameter of the site pipe or the flow requirement.
2, the interface, generally DN> 65 to select the flange interface, DN ≤ 65 can be freely selected according to user needs threaded or flanged.
Second, according to the type of media selection solenoid valve: valve body material, sealing material, temperature group 1, corrosive fluid: valve body material should use stainless steel or PTFE (PTFE, commonly known as plastic king), and optional fluorine rubber or PTFE seal material.
2, consumption or ultra-clean fluid: body material should use sanitary stainless steel, and optional silicone rubber sealing material.
3, high-temperature fluid: to choose to use high-temperature stainless steel materials and sealing materials manufactured by the solenoid valve, and to choose the piston type principle structure.
First, BURKERT direct-acting solenoid valve principle: Normally closed direct-acting solenoid valve is energized, electromagnetic coil electromagnetic force to lift the valve core, so that the valve core seal on the valve seat to leave the valve, open the valve; power failure, electromagnetic The force disappears, and the valve is pressed against the valve seat by the spring force and the valve closes. (Conversely, normally open type)
Features: It can work normally under vacuum, negative pressure and zero pressure difference. The bigger the valve diameter, the bigger the volume and power of the electromagnetic head. For example, the direct acting solenoid valve produced by our company with the introduction of HERION technology can be used for 1.33×10-4.
Mpa vacuum.
Second, Baode solenoid valve step-by-step direct-acting solenoid valve (that is, recoil type)
Principle: Its principle is a combination of direct action and pilot. When energized, the solenoid valve opens the auxiliary valve first. The pressure in the lower chamber of the main valve is greater than the pressure in the upper chamber, and the valve is opened by the simultaneous use of differential pressure and electromagnetic force; When power is applied, the auxiliary valve pushes the closing seal with spring force or medium pressure and moves downward to close the valve opening.
Features: It can work reliably even when there is zero pressure difference or about a certain pressure. The working pressure difference does not exceed 0.6 MPa. However, the power and volume of the electromagnetic head are relatively large and require vertical installation.
Third, the German BURKERT pilot solenoid valve principle: power, the electromagnetic force to drive the pilot valve to open the pilot valve, the main valve cavity pressure drops quickly, in the main valve upper and lower chamber to form a pressure difference, rely on medium pressure to promote the main valve closing parts move up The valve opens; when the power is turned off, the spring force closes the pilot valve, and the inlet medium pressure rapidly enters the upper cavity of the main valve through the orifice to form a pressure difference in the upper cavity, so that the main valve is closed.
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Sigma Elevator Company is a subsidiary of Otis Elevator Korea (OEK) in South Korea for all overseas/export markets. It was founded in 2000.
Starting in 1968, "Goldstar" elevators, and later on, "LG" elevators, were counted among the world's top elevator brands. With the beginning of this new millennium, that legacy lives on through the birth of "SIGMA" elevators.
SIGMA Elevator Company will continue on with its mission of supplying elevators and escalators to more than 50 nations worldwide through its global network of 11 sales companies, 2 offices, and 52 agents or distributors.
SIGMA Elevator Company is dedicated to providing its customers with the best quality products and services. SIGMA elevators feature unmatched safety, ride comfort, and modern design. SIGMA escalators and moving walkways are held to similar safety and comfort standards and are integral parts of our modern urban aesthetics.
Changwon factory, Korea, the main factory of SIGMA Elevator, has long been a well-established name in the global elevator industry. SIGMA`s Dalian factory in China produces elevators & escalators to meet the demands of the local and worldwide markets as well.
SIGMA Elevator Company is committed to increasing customer value through a sharp focus on product innovation and customer satisfaction. With technology developed over the past 30 years, an enduring innovative spirit, and enthusiastic attitude towards providing customer value, Sigma Elevator Company stands by its product and service lines with confidence.
Sigma currently has businesses in more than 75 countries worldwide, and subsidiaries in five countries; Hong Kong (China), Vietnam, Thailand, Malaysia and Singapore.
In the United States, Sigma elevators were distributed by CemcoLift, which was a historic elevator company bought by Otis and based in Hatfield, PA. However, in 2012 CemcoLift has gone bankrupt and replaced by a new company called Minnesota Elevator Solutions.
It's headquarter, factory and testing tower are located in Changwon, South Korea, which are also operated by Otis Elevator Korea. It also has a secondary factory in Dalian, China, opened in 1998 to meet demands on Chinese elevator market.
In 2014, Sigma had a partnership with EXPRESS Elevator Co., Ltd., an elevator company based in Suzhou, China as well as a subsidiary of Otis. In 2016, Express/Sigma opened their headquarters in Suzhou, China
LG Elevators was the elevator and escalator division of LG Electronics. It was acquired by Otis in 1999 and was later known as LG-OTIS Elevator Company.
LG changed its name from GoldStar in 1994 after GoldStar merged with Lucky Chemical. In 1999, it was acquired by Otis Elevator Company, later known as LG-OTIS Elevator Company from 2000 until 2003, when it was renamed to OTIS-LG Elevator Company. Later in 2006, OTIS-LG was again renamed to Otis Elevator Korea.
LG-OTIS Elevator Company (later OTIS-LG Elevator Company then Otis Elevator Korea) was a joint venture company between Otis and LG Electronics` elevator and escalator division, LG Elevators in South Korea. It was formed in 2000. The brand was renamed to OTIS-LG Elevator Company in 2003 and later Otis Elevator Korea in 2006, where it is currently known as that in South Korea
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