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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.
High Strength Steel Tie Rod are steel structural members made of carbon structural steel and alloy steel, processed by machining, heat treatment and surface anti-corrosion treatment, supplemented by adjusting sleeves, lock and joints etc. The Steel Tie Rod are important components of steel structures for construction of giant, large span buildings and ship docks. They are mainly used for prestressed parts and large span buildings in construction projects. While the strength of the product is improved, but the plasticity index is not reduced, which satisfies the principle of using the same amount of strength in the architectural design. The tie rods, tie bars, tension rods and tension bars steel grades are specified as grade 460, grade 520, grade 550, grade 650, grade 785, grade 830, grade 930, grade 1080 etc.
High Strength Steel Tie Rod
Steel Tie Rod,Stainless Steel Tie Rods,Structural Steel Tie Bars,High Strength Steel Tie Rod
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