In what conditions choose gate valve and butterfly valve?

Gate valve and butterfly valve are used in the pipeline switch, regulating the role of traffic. Of course, in the matching process of the butterfly valve and gate valve is still a method, Shanghai Hongfeng valve manufacturers to teach you how to match: Gate valve and butterfly valve in the water supply pipe network in order to reduce the depth of pipe overburden, the larger caliber pipe matching butterfly valve, Little effect on the depth of soil cover, and strive to match the gate valve, but the same specifications of the valve price butterfly valve than the high price. As for the caliber of the dividing line should be based on specific circumstances to consider. 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.

About gate valve In recent years, many domestic valve manufacturers, development, imitation soft seal gate valve, gate valve than the traditional wedge or parallel double gate valve has the following characteristics:

a. The valve body and valve bonnet of soft seal gate valve are cast by precision casting method. Once formed, they are basically not machined and do not use sealed copper rings to save 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 seal gate valve made in China is up to 1500mm in diameter, but the diameter of most manufacturers is between 80-300mm. There are still many problems in the manufacturing process in China. It is learned that the valve body of a valve manufacturer in Shanghai is entrusted to the domestic foundry with resin sand molding 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.

However, when opening and closing the soft seal gate valve, do not close the dead, as long as the water stop can be achieved, or not easy to open or rubber stripping. A valve manufacturer, in the valve pressure test, the use of torque wrench to control the degree of closure, as the water company's valve operator should be more imitation of this opening and closing methods.

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Zhongshan Lianwei Electrical Technology Co., Ltd. , https://www.lwwaterpump.com