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put the butterfly valve flanged steel from China

Offer type: salePublished: 20.11.2014
The rotary disk shutter
This device is used on a particular section of the pipeline to control, interrupt and start the flow of the transported environments. The design of the rotary disk shutter is a combination of three main parts: the chassis, bolt and stock. Complex technical components of the valve based on them.
The shutter disk: description
• Materials
The standard material for the housings of the rotary disc shutter is cast iron. Only in special cases in the course are materials such as carbon or stainless steel.
The rotary shutter stainless steel understandable demand in the food industry, where regulation and overlapping flows of raw materials and finished goods.
The configuration of the locking element can be quite complex or normal flat shape. Used in the manufacture of malleable cast iron, however, the upper layer may be made of stainless steel, bronze, brass, aluminum or chrome-plated cast iron. Due to the fact that you are using an expensive material on the rotary disk shutter, the price can be quite high.
• Types
On the constructive characteristics and ways of joining with associated equipment are distinguished: the shutter disk wafer, flange, eccentric and shutter back.
In conventional arrangements, the axis of the disc and stem are the same, but some modifications to avoid leakage in the landing place of the rod into the housing axis decentralized. The stem is split and whole, and for better sealing cover his double seal.
• Advantages
It so happens that the technical experts find it difficult to choose the shutter butterfly or klinovuyu valve? In favor of the latter speaks a clear advantage in speed of opening and closing, plus smooth throttle response, intermediate positions of the arm (the pressure drop during the flow of working medium through the narrowed passageway of the pipeline). The degree of accuracy of control of the shutter is not very high.
In order to avoid wear of the disk, failure of seals in contact with the working environment, the rotation of the shutter disk should preferably be conducted in the range from 15 to 75 °C.