Pneumatic Control Valve
Introduction:
The pneumatic control valve is a kind of rotary ball valve with a V-shaped port spool, which can effectively cut off the special impurities in the medium. The valve seat is made of metal or metal to PTFE sealing coordination. It combines the best control characteristics of the ball valve and butterfly valve, and can be used as both a control regulating valve and a shut-off valve. The V-shaped notch on the ball core has a shearing effect with the metal valve seat, which is especially suitable for controlling media with high viscosity, including fiber, solid particles and slurry. The paper pulp of the structure manufacturing paper industry is particularly superior. The valve has large flow capacity, small pressure loss, and the medium will not deposit in the cavity of the valve body. The valve not only has an approximate equal proportion of flow characteristics, a large adjustable range, the maximum adjustable ratio is 100:1, but also has the function of precise adjustment and reliable positioning.
Product features:
1. Integral structure of valve body: both the wafer type and flange type V-type ball valve bodies are integral side mounted structures with strong structural rigidity, which is not easy to cause deformation and leakage.
2. Upper and lower self-lubricating bearings: the valve body is equipped with upper and lower self-lubricating bearings, which have large contact area with the valve stem, high bearing capacity and small friction coefficient, reducing the torque of the valve.
3. The metal hard seal or PTFE soft seal can be selected for the valve seat according to the needs of the medium and working conditions: the sealing surface of the metal hard seal valve seat is welded with hard alloy, the spherical surface is plated with hard chromium, or is subject to hardening treatment such as spray welding and ion nitriding, so as to enhance the service life and temperature resistance of the sealing surface; Soft sealing PTFE valve seat or enhanced PTFE valve seat has good sealing performance, corrosion resistance and wide application range.
4. Economical and practical: the valve body is light in weight, the valve stem torque is small, and the corresponding specifications of pneumatic or electric actuators are small. Compared with other types of control valves, it has high cost performance.
5. Wide range of media applications: because of the shear force between the V-shaped opening and the valve seat, and the smoothness and roundness of the flow passage in the valve cavity, the media is not easy to accumulate in the cavity, so it is more suitable for the system control of media with fiber and solid particles in addition to liquid media.
6. Precise control of small flow: Precise control of small Cv value can be realized by processing the special V-shaped opening of small caliber valve core.
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