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General Valve - Model Twin Seal - Dual ...

General Valve - Model Twin Seal -Dual expanding plug valve

Evolution of Double Block-and-Bleed Valves An alternative to the original two-valve system, the GENERAL VALVE Twin Seal plug valve has just one double-seated bubble-tight valve� The upstream and downstream seals provide the same function as the two block valves� The body serves as a spool piece and the body bleed verifies seal integrity� Seal abrasion is inherent in the design of most ball and gate valves� In most instances, the seats are ground or wedged against metal every time the valve cycles� Any foreign material lodged between the seats and ball or gate will score the seating surfaces� Once the seating segment is scored, product loss and contamination result� The GENERAL VALVE Twin Seal plug valve avoids abrasion by having both independent slips completely retracted from the body bore during cycling. Zero-Leakage Double Block-and-Bleed Plug Valve with Retracting Seals