GENERAL VALVE
Twin Seal Double Block & Bleed

The original Twin Seal led to the rigid requirements of double block and
bleed service and resulted in the market leading Twin Seal valve. The
patented Twin Seal valve is a non-lubricated, resilient seal, expanding
plug-type valve which has a mechanical means of freeing the plug before
it is rotated from the closed to open position. The plug and seal slips rotate
freely, with no seal to body contact, eliminating seal abrasion and wear.
The unique, dove-tailed design plug is operated inward between the
slips, mechanically wedging out the seal slips for a positive upstream and
downstream shut-off. This creates a positive, mechanical shut-off of each
valve port independent of springs, system pressure or flow. In addition, the
primary seals are reinforced by a secondary metal-to-metal seal, resulting
in a superior, fire-safe design. Seals may be repaired with common tools
while the valve is in-line, after the line has been depressurized and drained.

INDUSTRY
• Industrial Processes
• Oil & Gas
• Aviation Fuelling
Primary markets served
• Pipeline
• Liquid Bulk Terminals
• Aviation Fuelling
• Refining
• Oil/Gas Production

APPLICATIONS
Pipeline pumping stations and terminals, refinery bulk loading terminals,
aviation and naval fueling systems, crude oil and refined products metering
and measurement systems, pig launcher/receiver systems, other specialty
applications in industrial process plants.

SPECIFICATIONS
• 70% opening: 2” up to 36” / 150 up to 1500LBS
• 100% opening: 2” up to 24” / 150 up to 600LBS
• 40% opening: 2” up to 42” / 150LBS

APROVALS
ISO 9001 and API 6D certified
API 6F A Fire Safe
GENERAL VALVE
Twin Seal Double Block & Bleed


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