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

90 M3/h Concrete Batching Plants

Features of concrete batching plant:The overall steel structure of the mixing station is made of high-quality steel, which has high overall structural strength and strong stability.The mixing machine adopts the twin-shaft forced mixing main machine, which has strong mixing performance, uniform mixing and high productivity.Excellent pneumatic components, electrical components, etc.; to ensure the reliability of the equipment, accurate metering performance.Each maintenance and repair site is provided with a walking platform or a check ladder, and has sufficient operation space.It is assembled by building blocks, which is short, quick and convenient.It is convenient and quick to use the cylinder discharge or electric push rod to discharge.variety of mixing processes, highly automated, high production efficiency,.Environmental protection and energy saving, using pulse dust removal, recycling waste-water for reuse.It adopts combined structure and unitized module, which is very convenient for installation and demolition.High performance twin-shaft, good mixing quality and high efficienc.Increase the unloading angle of the aggregate bin to solve the problem of unloading difficulties caused by rain.The electrical control system uses imported components, reliable performance and easy operation.

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