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Valbart manufactured the Through Conduit Gate Valve- Slab with full bore port, rising stem OS&Y and with floating seats and gates. This makes the valve pressure energized for a bubble tight shut-off upstream and downstream under both low and high differential pressure. The Double Block and Bleed (DBB) capability and the automatic relief of excess body pressure are standard features of this design. The seat faces are outside the flow steam and are protected from the erosive action of the flow. Pigs and scraper can be run through the gate valve without damage.

Features

• Negligible pressure drop across valve.
• Self-relieving seats with floating rings. 
• Superior, bubble tight seal performance.
• Suitable for all types of fluids, including abrasive fluids. 
• Full in-line maintainability. 
• Double block and bleed (DBB): Both seats hold their respective pressures independent of the body cavity pressure, which is ideal to verify that the seats are sealing. 
• Trunnion-mounted ball: Features a fixed ball and floating seat rings. Bearings absorb the side load generated by the pressure acting on the ball.

Optional Features

• Emergency sealant injection stem seal and seat face
• 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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