270/271 Series Butterfly Valves
Specification: DN50~600
1\ Double plow groove seat can not only make sure that the body, seat and disc connect correctly, but also ensure that the seat can be changed conveniently, which is helpful to avoid distorting by installation fault.
2\ Concatenate"O"series seal ring of the seat is enchased in the axle hole of valve body. The concatenate"O"series sealing ring will dilate out and tangent with valve body tightly and firmly when the stem insert the disc hole through it. In this way, when it leaks inside the valve, medium cannot afflux in the room between body and seat, which may result the accident of the seat locks disc or the seat blowout.
3\ Raised seal surface is combined with disk. Torque is much lower than former product. Life time is extended. Narrowband seal ring is combined with spherical disc organically, which make sure that torque will not increase before the disc close up; Make sure that service life of valve seat prolonged by friction decreased and open-close torque reduced, to make sure that open-close torque will not change in a long time.
4\ Stem spacer which locates between upper stem and down stem. It prevents down stem move upward.
5\ Seat locator is casted together with valve body. It prevents seat from moving. Mid-plummer-block spliced pole avoids frequent shake of the stem below which may result the stem divorced from valve body. Gibbosity on valve seat can avoids the possibility of seat distorted badly and torque increased rapidly, when the valve was installed improperly; And it also can avoid seat wriggling during the valve is opened and closed, when there is impurity on the surface of the seat after the valve is used for some time.
6\ Wide mount surface can be adopted by diversity flange types. The flange-sealing surface of valve seat is the structure of broadside and orthodrome, which follows the requirement of thimble or welded flange connection, and also can be connected with many other flanges.
Beijing Haolifa Group is a professional enterprise which is specialized in the R&D of high-performance valves, and is comprised by Beijing Haolifa Manufacturing Co., Ltd., Beijing Shan Er Pipes Control Components Co., Ltd., Beijing Dayu Holy Technology Co. Ltd., Beijing Haolifa Times Technology Development Co., Ltd., and Shanxi Haolifa Machinery Manufacturing Co. Ltd. Taking modern high-performance valves as its main products, Haolifa Group has the ability of independent exploitation, design of valves and other related equipments and production lines. It is a high-tech enterprise which is integrated with technology, manufacturing and trade.
Beijing Haolifa Group established complete and advanced production bases both in Beijing and Shanxi. There are totally 3 valve assembly factories in Beijing Production Base, which contributes to an annual output of 400, 000 valves; While in Shanxi Production Base, annual output has been expanded to 600, 000 valves and 50, 000 tons of castings by a strong combination of 1 general valve assembly plant, 2 foundry plants, 1 rubber sealing factory and 1 machine test and processing factory. Shanxi Production Base brings in numbers of large-scale equipments, which includes 1 Japanese Sinto foundry production line, 1 resin sand production line, 2 sets of 15tons electric furnaces, 1 set of 6 tons electric furnace, 6 sets of 1 ton electric furnace, as well as hundreds of other processing and production equipments. We can also provide outside subcontracting service and precision testing service for all kinds of valves and machine spare parts.
Haolifa, with qualified equipments, advanced producing crafts, perfect test and measuring means, rigid material selection, fast and considerate before and after- sales service, is conferred as Beijing High Technique Enterprise by Beijing Technology Commission, listed as Emphatically Protected
Enterprise in Eradicating and Supporting Superior Enterprise by China Quality Association, firmly believed as Quality and Service Assured Enterprise by China Quality Testing Association, etc. Some of our products have achieved national patents and Haolifa is honored as Top Ten Pump and Valve Brand, Top Ten New Products in Water Industry. Haolifa has also been commended for Olympic Games construction project and other great national construction projects. We have passed the ISO9001: 2008 Certificate, CE Certificate, Environmental Management System 14001
Certificate, RoHS Certificate and also achieved Manufacture License of Special Equipment in People's Republic of China.
