Galvanized sheet coil is made of hot rolled steel strip or cold rolled steel strip as base plate through continuous hot dip galvanizing process. After the transverse cut to rectangular plate supply for hot galvanized sheet; Take hot dip galvanized coil supplied in roll form. Galvanized sheet rolls can be divided into hot rolled galvanized sheet rolls and cold rolled hot galvanized sheet rolls, they are mainly used in construction, home appliances, automobiles, containers, transportation and home industry and other fields. Especially steel structure construction, automobile manufacturing, steel plate warehouse manufacturing and other industries. Their main characteristics are: strong corrosion resistance, good surface quality, conducive to deep processing, economic and practical Galvanized Steel Coil,Galvanized Coil,Ppgi Steel Coil,Galvanised Steel Coil Shandong Panhua Metal Material Co. LTD , https://www.panhuametal.com
Gate valve and butterfly valve analysis
1 gate valve and butterfly valve in the water supply pipe network in order to reduce the depth of pipe covering, the larger diameter pipe matching optional butterfly valve, little effect on the depth of soil cover, and strive to matching gate valve, due to the caliber of the dividing line should be based on specific considerations. For nearly ten years of use, the butterfly valve has a higher failure than the gate valve, so expanding the use of the gate valve is noteworthy given the conditions permit. (2) gate valve In recent years, many domestic valve manufacturers, research and development, imitation soft seal gate valve, gate valve than the traditional wedge or parallel double gate valve has the following characteristics: a. Soft seal gate valve body, valve cover The use of precision casting casting, a molding, the basic non-machining, do not use sealed copper ring, saving non-ferrous metals. b. soft seal gate valve at the bottom of pits, no accumulation of slag, valve gate opening and closing failure rate is low. c. Soft sealing rubber lined valve plate uniform, interchangeable. Therefore, the soft seal gate valve will be the water industry is willing to adopt a form. At present, the soft-sealed gate valve made in China has a caliber of 1500mm, but most manufacturers manufacture the caliber of 80-300mm. There are still many problems in the domestic manufacturing process. From the circumstances of the inspection, the valve body of a valve manufacturing company in Shanghai is entrusted Domestic foundry resin sand mold casting, soft seal valve plate is imported from a foreign company. The company believes that the key component of the soft seal gate valve is Lined plastic valve plate, and Lined plastic valve plate higher technical requirements, not all foreign manufacturers can achieve, often from the reliable factory purchase assembly. Domestic soft seal gate valve copper nut block is embedded in the liner rubber valve plate above, similar to the structure of the valve, the activity of the nut block friction easy to strip valve liner rubber stripping. A foreign company's soft seal gate valve, copper nut block is embedded in lining rubber gate, forming a whole, to overcome the above shortcomings, but the valve cover and valve combination of high concentricity requirements. When opening and closing soft seal gate valve, do not close the dead, as long as the water stop effect can be achieved, or not easy to open or rubber stripping. A valve manufacturing company in Shandong, the valve pressure test, the use of torque wrench to control the degree of closure, as the water company's valve operators should be more imitation of this hoist method. This keyword search: more valve supply information