Non-Rounded Spiral Wound Gaskets
Product Description
Product Detail
Non-Rounded Spiral Wound Gaskets – Oval & Oblong Gaskets for Boiler Handholes and Manholes | Model KXT-630
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Non-rounded spiral wound gaskets are custom-shaped sealing elements used on boiler handholes and manholes where a standard circular gasket cannot fit. Unlike round spiral wound gaskets, there is no universal dimensional standard for this style — every gasket is produced to the buyer's own inside dimensions, width, thickness or drawing. Kaxite's model KXT-630 covers two shapes: oval and oblong. Both are built from a V-shaped metal winding strip combined with a soft filler (graphite, PTFE or non-asbestos), giving the gasket strong recovery and reliable sealing under the cyclic pressure and temperature changes typical of boiler handhole and manhole service.
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Two Gasket Shapes for Different Boiler Openings
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Oval SWG
Two different radii on the same gasket — a narrower radius at the two ends and a wider radius along the sides. Used on boiler handhole covers where the opening is longer than it is wide.
Order format: Inside A × B, width b, thickness s
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Oblong SWG
Straight parallel sides with semicircular ends — essentially a circle stretched along one axis. Used on manhole covers where the opening is significantly longer than it is wide.
Order format: Inside A × B, width b, thickness s
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Construction and Materials
| Winding strip | V-shaped preformed metal strip, wound under tension. Material options: AISI 304, AISI 316, AISI 316L, AISI 321, Monel, Inconel or as specified. |
| Filler | Soft sealing material alternated with the winding. Options: flexible graphite, PTFE, non-asbestos fibre — selected to match the boiler fluid and temperature. |
| Inner / outer ring | Optional. Inner ring prevents turbulence and inward buckling; outer ring gives radial location and compression stop. For non-rounded shapes these are usually supplied only when the drawing specifies them. |
| Gasket thickness | Typically 3.2 mm, 4.5 mm or 6.4 mm — final thickness confirmed against your groove depth and bolt load. |
How to Order
Because non-rounded spiral wound gaskets have no universal standard, a complete specification is required for quotation. Please provide the inside dimensions (A × B), gasket width (b), thickness (s), winding material and filler type — or simply send a drawing of the boiler opening.
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ORDER EXAMPLE
SWG Oval (or oblong)
A × B × b × s Winding: AISI 316 Filler: Graphite
Replace A × B with your actual inside dimensions, b with gasket width, s with thickness. Attach a drawing if you have one — we will confirm feasibility before quoting.
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Typical Applications
| Boiler handhole covers | Access openings on industrial and utility boilers for inspection and cleaning. |
| Boiler manhole covers | Larger oval or oblong openings for personnel entry during maintenance. |
| Pressure vessels | Non-circular inspection ports on vessels handling steam, hot water or process fluids. |
| Heat exchangers | Non-standard cover plates where a round gasket will not fit. |
Related products: Standard Spiral Wound Gasket, Spiral Wound Gasket with Inner and Outer Ring, Exhaust Spiral Wound Gaskets.
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Send Us Your Drawing for a Quotation
Attach a hand sketch or CAD drawing with dimensions A × B, width and thickness — we confirm feasibility and return a quotation within 24 hours.
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Send Inquiry All Spiral Wound Gaskets |