Monitoring port.
The primary external seal is provided by the interaction of the surface of the plug, the circumferential sealing surface of the PTFE sleeve, and the valve body.
To enhance protection against external leakage, these PTFE chevron rings provide a secondary (redundant) pressure-assisted stem seal.
Carbon graphite filled PTFE and rings prevent extrusion of the PTFE packing.
Live loaded spring washers provide a constant uniform pressure on the packing. The spring washers compensate for any expansion and contraction of the PTFE packing rings caused by temperature fluctuations.
To protect the spring washers from damage and particle intrusion, they are completely enclosed.
A patented shrink-seal lip is machined in the interior bore of the bonnet. Any radial shrinkage of the PTFE packing causes the packing to compress tightly against this lip. This patented lip actually tightens the seal as the packing shrinks.
Longer-lasting in-line sealing
The inert PTFE sleeve completely surrounds the plug. The sleeve provides a full-circumferential sealing surface from port to port. Open, closed, or rotating, the seal is assured.
The PTFE sleeve is chemically inert. It resists heat and stress cracking. Moisture absorption is negligible. It provides self lubrication.
The engineered body bore employs high pressure cast ribs to assure tight in-line sealing. This assures the best possible concentricity between the plug and valve body.
360° port defining lips (introduced and patented by XOMOX) surround the valve ports. As the plug turns in the resilient PTFE sleeve, these lips wipe off any residue or particles adhering to the plug. They also protect the sleeve from erosion, prevent cold flow deformation, and eliminate sleeve rotation.
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Xomox offers single-source responsibility for a broad line of application-specific Tufline valves and Matryx actuators for your most demanding applications.
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Rely on Xomox consultive selling services for innovative valving solutions. Knowledgeable Xomox Sales Engineers, technical support staffs, service center personnel and authorized distributors will all help you dramatically reduce downtime and greatly extend valve service life.
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Typically, with Tufline Valves, downtime and maintenance are dramatically reduced. Service life is greatly extended. Many processors experience dramatic cost reductions when they switch from ball and gate valves. Scores of case histories prove it. A small investment in Tufline Valves can provide a huge R.O.I. Call us. We will show you the numbers.