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Inside the seal
Cut open to show how it works: purge gas collects under the outer head and the inverted cone keeps air from getting down the stack.
Scroll to see how it is built · drag to turn it round
Oil & gas · Flare systems
Allmarc 3D model · to scale
Molecular Seals
The seal in a flare stack that stops air creeping down into the stack: an outer shell with an inverted inner cone, flanged into the stack, fabricated to the licensor’s drawing.
Explore the model
How it is built.
Scroll: the camera moves to each part in turn and ends on the exploded view. Drag to turn it round yourself.
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Shell and heads
The outer shell and conical heads, rolled and welded, with stiffener rings.
How is it possible at Allmarc?
Used here for: Shell and heads
In 2024 we were the only buyer of Deratech’s 20 kW, 12 m laser.
- 20 kW
- 12 x 3 m bed
- Pallet changer
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The baffle
The inner tube and inverted cone: the part that makes it a seal. Fit-up is checked before the shell is closed round it.
How is it possible at Allmarc?
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Flanged into the stack
Flanges machined flat so the seal bolts into the stack without leaks.
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Nozzles, manway, lugs
Drain and instrument nozzles, a manway, and lugs for the lift.
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Part of the stack
See Elevated Flare Stacks for the stack itself.
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A kit of parts
Shell, baffle, flanges and nozzles: every member numbered, match-marked and packed in erection sequence.
Why Allmarc
Experience you can trust.
We fabricate to your drawings and prove the fit in our own bay before anything ships. Open any line for the detail.
Talk to an engineerFabricated to your drawings
- We build to the licensor’s design.
- We do not compete with the people who send us work.
Proven before it ships
- Trial-assembled in our bay.
- Fit-up is settled in Ahmedabad, not on site.
Plate to packed container
- Procurement, rolling, welding and NDT, coating, insulation.
- Export packing designed for the journey.
Scale
- Made in Unit 2, our precision plant for oil and gas; 4 plants at Kanbha, about 6,000 T a month from November 2026.
- 2,400 tonnes of flare equipment exported to date.
Start a project
Send us a drawing
Have a drawing? Let us build it.
We fabricate to your design, from plate to a packed container. An engineer will tell you honestly how we would build it.