A circular valve disc for opening and closing member to open and rotates with the stem, and closing a valve regulating the fluid passage. The butterfly valve's disc is mounted in the diameter direction of the pipe. In the cylindrical passage of the butterfly valve body, the disc-shaped disc rotates around the axis, and the rotation angle is between 0° and 90°. When the rotation is 90°, the valve is fully open.
Butterfly valve structural features has a simple structure, small size, light weight, material consumption province, installation of small size, fast switch, 90 ° reciprocal rotation, the driving torque is small, etc., used to cut, turned, adjusts the line of Medium with good fluid control and closed sealing properties. When the butterfly valve is in the fully open position, the thickness of the disc is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small, so it has better flow control characteristics. The butterfly valve has two sealing types: a spring seal and a metal seal. Elastomeric sealing valve , the sealing ring can be mounted on the valve body or attached to the periphery of the disc.
Valves with metal seals generally have a longer life than elastomeric seals, but are difficult to seal completely. Metal seals can accommodate higher operating temperatures, while elastomeric seals have temperature-limited defects.
If a butterfly valve is required for flow control, the main choice is the correct size and type of valve. The structural principle of the butterfly valve is especially suitable for making large diameter valves. Butterfly valves are widely used not only in general industries such as petroleum, gas, chemical, and water treatment, but also in cooling water systems for thermal power plants.
Commonly used butterfly valves are clip-on butterfly valves, flanged butterfly valves, and butt-welded butterfly valves. The wafer type butterfly valve uses a stud bolt to connect the valve between the two pipe flanges; the flange type butterfly valve has a flange on the valve, and the two ends of the valve are flanged on the pipe flange; Both ends of the butterfly valve are welded to the pipe.
The streamlined design of the disc makes the fluid resistance loss small, which is an energy-saving product.
The valve stem is a through-rod structure. After quenching and tempering treatment, it has good comprehensive mechanical properties, corrosion resistance and scratch resistance. When the butterfly valve is opened and closed, the valve stem only rotates and does not perform lifting operation. The packing of the valve stem is not easy to be broken and the sealing is reliable. It is fixed with the cone pin of the butterfly plate, and the overhanging end is designed to prevent the punch-out type, so as to prevent the valve stem from collapsing when the valve stem and the butterfly plate are accidentally broken.
Active Pharmaceutical Ingredient (API)
We are a manufacturer and supplier of raw materials, intermediates for pharmaceuticals, as well as Active Pharmaceutical Ingredient (API). Our focus is on providing customers with high quality, fair priced products, coupled with our broad range of technical know-hows on fundamentals, vast industrial experience on applications, professional expertise on health and safety, and efficient logistics on customer services. We have established good market for our intermediates in India, Korea and EU. Besides of their intermediates, we can also synthetize the API directly. We also have some API by fermentation, Polymyxin B Sulfate is one of them and we are developing more APIs as well.
Our production is based on GMP standard workshop, according to international Pharmacopoeia standard, making sure your experience with Sunshine Biotech is always enriching, satisfying and fulfilling.
Active Pharmaceutical Ingredient (API)
Active Pharmaceutical Ingredient,Polymyxin Sulfate,Ziprasidone Hcl,Polymyxin Sulphate
Nanjing Sunshine Biotech Co., Ltd , http://www.sunshine-bio.com