How to choose the gate valve and butterfly valve

Gate valve and butterfly valves are used to switch in the pipeline, adjust the role of flow. There is a way or the matching process of butterfly valve and gate valve.

Adamant valve manufacturers can teach you how to choose the valve in the water supply pipe network to reduce pipeline overburden depth, large diameter pipes generally matching butterfly, overburden depth, and matching gate, but the gate price of the same specification is higher than the butterfly valve. As for the caliber of the demarcation line should be considered according to specific circumstances. From the past ten years, the failure of the sanitary butterfly valve is higher than the gate, so in the circumstances permit, the expansion of the scope of the use of gate valve is noteworthy.

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

A. soft sealing gate valve body, valve cover using precision casting, a molding, basic non mechanical processing, do not use sealed copper ring, saving non-ferrous metals.

B. soft sealing gate valve at the bottom of the pit, no accumulation of slag, gate valve opening and closing failure rate is low.

C. soft sealing rubber lining valve plate size is uniform, interchangeable.

Therefore, the soft sealing gate valve will be a form of water industry is willing to use. Soft sealing gate valve diameter is up to 1500mm of domestic manufacturing, there are still many problems in the domestic manufacturing process, the valve manufacturer was commissioned by the domestic foundry resin sand molding casting, is imported from a foreign company's soft sealing valve plate. The company believes that the key component of the soft sealing gate valve is a rubber lined valve plate, and the higher technical requirements of the rubber lined valve plate, foreign manufacturers are not all can be achieved, often purchased from the quality of the reliable assembly.

The domestic soft sealing gate valve copper nut block is embedded in the rubber lined valve plate above, similar to the structure of the valve, because of the friction of the nut block is easy to make the valve plate rubber stripping. A foreign company's soft sealing gate valve, copper nut block is embedded in the lining of the rubber gate, the formation of the whole, to overcome the shortcomings, but the valve cover and the valve body combined high concentricity requirements.

But in the opening and closing the soft sealing gate valve, as long as the water sealing effect can be achieved, otherwise it is 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, the water company's valve operators should be more similar to the opening and closing method.