Kaxite Sealing manufactures Vermiculite 845 Kammprofile gaskets from a serrated metal core faced with high-temperature Thermiculite vermiculite material. The metallic core provides rigidity and blow-out resistance; the soft vermiculite facing provides exceptional sealing performance on both standard and non-standard flange faces.
This grade is the direct functional equivalent of the Flexitallic Thermiculite® 845 Flexpro™ Kammprofile gasket. It reaches a maximum working temperature of 982 °C and handles pressure up to 431 Bar / 6251.14 PSI — a combination that most spiral wound gasket grades cannot match. It is the standard choice for very high temperature and hazardous media service on refinery, petrochemical and power station flanged joints.
Three styles are available: VERM-B (sealing element only), VERM-F (sealing element with integrated outer ring) and VERM-L (sealing element with loose outer ring). Custom sizes, OEM private-label packaging and flexible MOQ are available for B2B buyers. Send your flange standard, nominal pipe size, pressure rating, style and quantity and we will quote.
The Vermiculite 845 facing covers the widest temperature band of any soft gasket material on the market — from deep cryogenic service up to near the sintering temperature of many metals.
Working temperature range of the Thermiculite vermiculite facing: −240 °C / −400 °F minimum, +982 °C maximum. The continuous solid bar reflects the fact that the sealing performance does not degrade abruptly at any point inside this band — unlike graphite, which oxidises above 650 °C in air.
A Vermiculite 845 Kammprofile gasket is built from three elements working together: a solid metallic core, a serrated profile machined into that core, and a high-temperature vermiculite facing laminated onto both sides.
The metallic core carries the bolt load and gives the gasket its rigidity, which is what resists blow-out under high pressure. The serrated profile concentrates the bolt load onto a series of narrow contact lines, which produces a very high local sealing stress with only moderate bolt tightening. The vermiculite facing fills the valleys between serrations and forms the primary seal against the flange face.
Because the load is concentrated on the serration crests rather than spread over the whole gasket surface, a Kammprofile gasket delivers a tighter seal than a flat gasket at the same bolt load — and it can be handled and installed much more easily than a spiral wound gasket of the same dimensions. This is the key advantage in very high temperature and hazardous media service, where a failed seal cannot be safely re-tightened.
All three styles use the same sealing element — the difference is how the gasket is centred and retained on the flange. Selecting the correct style depends on the flange face type, the bolt circle, and whether the outer ring needs to be reused.
Just the serrated core with vermiculite facing. Used with existing bolting and separate centring rings, or where the flange has its own retaining grooves. Lowest profile, lowest cost.
The sealing element and outer ring are joined into one piece. The outer ring is bolted to the sealing element and stays with the gasket during installation. Standard choice for most high-pressure applications.
The sealing element is separate from the outer ring. The outer ring guides the sealing element into position but is not attached to it. The outer ring can be reused when only the sealing element is replaced.
The serrated core flexes as bolt load is applied, so a single gasket design covers the four most common flange face types without requiring a different part number for each.
Full-face sealing surface used on cast iron and low-pressure flanges. The vermiculite facing fills the full contact area.
Recessed groove and matching tongue. The serrated core provides a rigid base that keeps the seal stable in the groove.
Standard for ASME B16.5 and B16.47 flanges. The gasket sits inside the raised face and centres on the bolt circle.
Deep groove and matching tongue. The Kammprofile core provides a solid metal backing that resists extrusion under pressure.
To return a firm unit price, lead time and available samples, send the following five items with your enquiry. If you already have a flange drawing or a sample of the existing gasket, attach that instead — we will match it directly.
Or specific gasket inner / outer diameters if non-standard.
Class 150 / 300 / 400 / 600 / 900 / 1500 / 2500 or PN10 to PN250.
VERM-B (element only), VERM-F (integrated ring), or VERM-L (loose ring).
Standard SS316L, or specify an alternative alloy and serration profile.
Order quantity and destination port so we can quote freight-inclusive or FOB.
If you are unsure which style or core material is right for your service, send the medium, temperature range and pressure and our engineers will recommend the correct configuration. Custom serration profiles, non-standard dimensions and customer-branded packaging are all available.
Send your flange standard, nominal pipe size, pressure rating, gasket style and quantity. Our sales engineers reply with a quotation, available samples and the packing options for your market.
Address
No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
