The characteristics of the soft seal plug valve are respectively the valve body, the plug, the stem seal, the line direction (inner leakage) seal, the valve plug and the sleeve are online, and the pipeline direction seal adjustment.
1.Body
The valve body is redesigned, There are reinforcing ribs amoung the flange, valve body connection and the bottom of the valve body, which makes the valve body strong and extends the service life.
2.Plug
The spool plug is a 2 degree plunger, compare to same size other valves, the seal area is twice larger than them. The larger seal area, the longer lifetime and larger CV.
3.Seal of Stem
The first seal is 360 degree contact which are between upper part of the cock and the PTFE sleeve.
The second seal is a uniquely designed PFA sealing diaphragm. The unique design of the PFA reverse lip diaphragm makes the pressure and the reverse lip diaphragm compress the valve stem when the pressure under the diaphragm is too large, thereby providing an enhanced dynamic seal;At the same time, the anti-lip diaphragm seals the center under the crushing action, and closes against the valve stem to form a static seal
4.Sealed in line direction (inner leak)
The tightly fitting conical valve plug and PTFE sleeve form a precision seal. The sleeve surrounds the valve plug port and tightly wraps the upper and lower parts of the valve plug so that it has no cavity and forms a two-way seal.
The seal is completely independent of the pipeline pressure.
No metal-to-metal contact, precise sealing.
Stainless steel stainless steel valve rotates freely without lubrication
The seal is adjustable online, and maintenance does not require removing the stainless steel valve from the pipeline.
The skirt at the contact between the valve plug and the sleeve forms a self-scanning effect, which can effectively eliminate impurities in the medium and avoid damage to the valve plug and the skirt. It is suitable for working conditions with slurry.
5.Valve plug and sleeve in line, pipeline direction sealing adjustment
The characteristic of the plug valve is that after the valve seat is worn for a period of time, the tapered valve plug can be adjusted downward to form a new sealing surface, and it can be achieved under line and pipeline pressure, thereby saving maintenance time and reducing maintenance costs. Very different from the usual adjustment method.
The usual adjustment method is to adjust downward through three bolts, so as to press the valve plug downward to achieve a new sealing surface. This adjustment method requires that the three bolts must be adjusted evenly, which is difficult to achieve in actual operation. If the adjustment is uneven, the cock will deflect to one side, causing damage to the valve seat during closing; at the same time, the valve stem seal will also be damaged; the torque of stainless steel and stainless steel valves becomes larger. Causing internal leakage and stem leakage.
The adjustment adopts a cylindrical cut surface to contact with the plane. It is a patented rocker adjuster. The valve plug is adjusted downward through two bolts.
Therefore, only two bolts are needed to adjust the system, and turning any bolt can cause the gland to produce uniform vertical downward pressure, thereby avoiding the offset of the cock and strengthening the seal.
