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Valbart manufactured the Through Conduit Gate Valves- Double Expanding Gate with full bore port and rising stem OS&Y. In addition, the floating seats and gate are pressure energized for a bubble tight shut off upstream and downstream under both low and high differential pressure. The double block and bleed capability (DBB) and automatic relief of excess body pressure are standard features of this design. The seat faces are outside the flow stream and are protected from the erosive action of the flow. Pigs and scraper can be ran through the valve without damage. 

Features

• Positive Sealing- capability of improving the seal tightness by increasing the stem thrust. 
• Negligible pressure drop across valve.
• Self-relieving seats with a floating gate.
• Double block and bleed performance.
• Double seal- both upstream and downstream seats contribute to guarantee a tight seal. 
• Bi-directional with preferred flow direction
• Suitable for all types of fluids, including abrasive fluids. 
• Particularly indicated for pig trap isolation. 
• Double isolation- valve seals through line pressure and external mechanical force.

Optional Features

• Metal seated valves
• Extended stem and fittings for below ground service
• Numerous body, trim, seal area overlay and seal materials available

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