About Fluoroplastic Lined Butterfly Valve

With the rapid development of the modern petrochemical industry, some of the media used in special operating conditions are highly corrosive. Even stainless steel valves and lining rubber can not meet the needs of enamel valves. If the use of Hastelloy, Monel or Alloy No. 20 as the valve material, due to its large amount of Ni, Cr, Ti, Mo, Nb and Pt and other rare metals, its limited resources, expensive. According to the results of modern science and technology, fluorine plastic molecular structure with fluorocarbon bond and its shielding effect, with excellent corrosion resistance, high (low) temperature, non-sticking and electrical insulation, almost to resist all chemical media (Including hydrofluoric acid, concentrated sulfuric acid and aqua regia) corrosion. Fluoroplastics plastic processing principle, the fluorine plastic lined in the ordinary steel shell to cut off the metal contact with the strong corrosive media, both to solve the problem of low strength and can not withstand the high pressure of fluoroplastic, but also solved the Steel material is not resistant to corrosion problems. Fluoroplastic-lined valves have excellent heat and cold resistance, excellent electrical insulation and excellent chemical stability, and are resistant to all types of strong acids, strong bases and strong oxidizers. Low friction and very good self-lubricity , Long-term use in the range of - 195 ~ 200 ℃. Scope Fluoroplastic lined butterfly valve nominal pressure of PN116 (fluoroplastic pressure up to 215MPa). DN50 ~ 1 200. Valve temperature by the choice of different materials (metal materials and non-metallic materials) can withstand the temperature comprehensive assessment. Such as steel lined fluorine plastic (WCB + F46) material, the use of temperature - 29 ~ 150 ℃. Limit the maximum value does not exceed 150 ℃. Suitable medium for low viscosity acids and bases and other corrosive media, mainly refers to acidic, alkaline, organic and inorganic solvents and other corrosive media. Low viscosity is relatively high concentration of granular media, the fluorine plastic lined valve should be avoided using the solid particles of the media test method (1) temperature test Temperature measurement involves room temperature to liquid nitrogen temperature range, the use of thermocouple thermometer measurement, Temperature signal through the digital multimeter measurement, acquisition and input measurement and control computer, displayed on the computer interface, and the computer automatically record and save. At the same time, the computer sends the temperature measurement to the temperature display on the instrument panel for on-site display. (2) Pressure test pressure measurement range of 0 ~ 10M Pa. The use of pointer precision pressure gauge and digital pressure gauge on the instrument panel on-site display of system pressure at the same time, the use of pressure transmitters to measure system pressure and converted to voltage signals measured by the digital multimeter to collect and input measurement and control computer , Displayed on the computer interface and automatically recorded and saved by the computer. (3) Level In order to ensure the liquid nitrogen level to meet the valve test requirements, the use of differential pressure transmitter to measure the liquid level. Measurement of electrical signals through the digital multimeter measurement, acquisition and input to the computer for display, and reminded filling liquid nitrogen and stop liquid nitrogen filling operation. (4) flow rate According to the different forms of valve sealing, the valve allows the amount of leakage is different. Soft seal structure of the valve, the amount of leakage should be zero. For hard-sealed valve itself is allowed to have a certain amount of leakage. Based on the above, two devices for measuring the flow rate are provided, one of which is a low-flow meter for measuring the leakage of a hard-sealed valve or a soft-sealed valve that allows a certain amount of leakage in a relatively abnormal working state. For a small amount of leakage, as the general flowmeter has been unable to detect, you need to observe and count the number of open-ended bubbles in the water to measure the number of leaks. Using computer data acquisition system to record the number of electrical pulses to achieve automatic counting.

Multi-layer Co-extrusion Machine

1: Polestar Machinery Can Provide Multi-Layer Co-Extrusion Equipment For The Production Of Multi-Layer Oxygen Barrier Pipes, Glass Fiber Reinforced Multi-Layer Pipes, Multi-Layer Heat Shrink Pipes, Ultra-Quiet Drainage Pipes, Etc.

2: The Multi-Layer Co-Extrusion Pipe Production Line Is Mainly Used To Produce Composite Pipes Such As PE Pipes, PPR Pipes, PERT Pipes, Silicon Core Pipes, Etc., Using Multi-Layer Co-Extrusion And One-Step Forming.

3: The Specially Designed Adjustable Compound Co-Extrusion Head Can Quickly Ensure The Uniform Compounding Of Multi-Layer Plastics And Media, And The Ideal Thickness Of Each Layer Can Be Quickly Obtained Without Adjusting The Extruder Speed.

4: The Special Design Of The Mold Ensures The Low-Temperature Plasticizing Effect, And The Special Temperature Control System In The Core Ensures The Appearance And Quality Performance Of The Co-Extruded Pipe.

5: A Variety Of Control Systems Are Available For Users To Choose From. The Entire Production Line Adopts PLC Programmable Computer Control System To Ensure High-Speed Synchronous Control And Smooth And Reliable Operation Of The Entire Production Line.

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