Buy VCS flange isolating gasket kits direct from Ningbo Kaxite Sealing Materials Co., Ltd., a China-based manufacturer and exporter. The VCS kit is usually made of G10 glass-reinforced epoxy laminate bonded to an SS316 stainless steel metal core, providing exceptional insulating and general sealing performance in aggressive material applications. It is suitable for all very critical services up to and including ANSI 2500# and API 10,000# classes, and can match raised face, full face and ring type joint (RTJ) flanges. The unique pressure-activated sealing mechanism requires far less bolt stress to seal than any other type of gasket.
Four engineered layers work together. The laminate provides electrical isolation. The stainless steel core provides structural strength. The machined seal grooves break the leak path. The spring-energized PTFE seals provide the pressure-activated sealing performance.
G10 or G11 high-strength laminate bonded to the metal core. Provides complete electrical insulation between the flange faces and breaks the potential leak path inherent in glass laminate materials.
Bonded inside the laminate. Provides the strength of a traditional metallic gasket while maintaining complete electrical insulation. Standard thickness 6.2 mm or 7.8 mm.
Machined through the laminate insulating material and into the stainless steel core. This provides a strong base for the seal to sit into and breaks the potential leak or weep path.
Installed in the dovetail-shaped seal grooves to provide the trademark pressure-activated sealing performance. Replaceable in the reusable gasket retainer.
This page is written for procurement engineers, pipeline maintenance teams, cathodic protection engineers and EPC contractors who need a reliable VCS flange isolating gasket kit manufacturer. Whether you are comparing quotes, verifying the SS316 core certificate or scheduling a bulk delivery for a wellhead or RTJ project, the sections below cover the technical facts and commercial terms you need to place a firm order.
The VCS flange isolating gasket kit is usually made of G10 and SS316 metal core, and it provides exceptional insulating and general sealing performance in aggressive material applications. The VCS flange isolating gasket kit is suitable in all very critical services up to and including ANSI 2500# and API 10,000# classes. It can match all types of flanges such as raised face flanges, full face flanges and ring type joint flanges.
Due to the unique pressure-activated sealing mechanism of the VCS flange isolating gasket kit, it requires far less bolt stress to seal than any other type of gasket. The VCS isolating gasket inner diameter is exactly matched to the flange bore to eliminate turbulent flow and flange face erosion or corrosion. The seal elements are replaceable in the reusable gasket retainer. The Kaxite VCS flange isolating gasket kit is equal to Pikotek VCS isolating gasket kits.
The unique and patented design of the VCS flange isolating gasket kit incorporates high-strength glass-reinforced epoxy laminate bonded to a stainless steel core like stainless steel 316. This provides the strength of a traditional metallic gasket while maintaining complete electrical insulation between the flange faces. Seal grooves are machined through the laminate insulating material and into the stainless steel core. This provides a strong base for the seal to sit into and breaks the potential leak or weep path that is inherent in glass laminate materials. Spring-energized Teflon internal face seals are installed in the dovetail-shaped seal grooves to provide the trademark pressure-activated sealing performance distinguishing the VCS kit from all other high-pressure insulating gaskets.
Internal pressure energizes the PTFE seals against the dovetail groove, so sealing force increases as line pressure rises. No other high-pressure insulating gasket works this way.
The stainless steel core carries the mechanical load of the flange. The laminate only sees dielectric duty, so the gasket does not creep or extrude at high pressure.
Machining the seal groove through the laminate and into the metal core breaks every laminate layer. Fluid and gas cannot migrate along the laminate edges.
The seal elements are replaceable in the reusable gasket retainer. Only the seals need to be replaced at maintenance intervals, reducing lifecycle cost.
Every component of the VCS kit is selected to match the flange class, the service medium and the required dielectric strength. The central gasket core, metal core and sealing ring are the sealing-critical components. The sleeves and washers provide the bolt isolation.
G10 or G11 glass-reinforced epoxy laminate. Bonded to the metal core. Provides electrical insulation between the flange faces.
SS316 stainless steel or other steel metal. Provides mechanical strength. Standard thickness 6.2 mm or 7.8 mm.
Spring-energized PTFE. Installed in the dovetail-shaped seal grooves. Provides the pressure-activated sealing performance.
G10, G11, G7 or Phenolic. Isolates the nut face from the flange face.
G10, G11, Mylar, Phenolic or Nomex. Isolates the bolt from the flange.
Zinc-plated carbon steel as standard. Stainless steel available on request.
| Component | Standard Material |
|---|---|
| Central big gasket | G10 or G11 |
| Metal core | SS316 or other steel metal |
| Sealing ring | Spring-energized PTFE |
| Thickness | 6.2 mm or 7.8 mm |
| Insulating washers | G10, G11, G7, Phenolic |
| Insulating sleeves | G10, G11, Mylar, Phenolic, Nomex |
| Steel washers | Zinc-plated carbon steel or stainless steel |
For a specific material certificate, dielectric test report or SS316 heat traceability document, request it with your order. All values will be confirmed against the mill certificate before shipment.
The VCS flange isolating gasket kit can be used for insulation in conjunction with cathodic protection, insulation between dissimilar metals to prevent galvanic corrosion, wellhead isolation from interconnected flow lines, valve connections, Christmas Tree connections, compressor connections, tanks and heat exchangers with sacrificial anodes to increase anode life, and mating mismatched ring-joint to raised-face flanges. It can eliminate fluid trap corrosion between ring-joint (RTJ) flanges where high concentrations of CO2, H2S and other aggressive hydrocarbon media are present, and it can also eliminate turbulence and flow-induced erosion between RTJ flanges.
Isolation in conjunction with cathodic protection systems on buried and offshore pipelines. Prevents stray current from reaching the protected structure.
Insulation between dissimilar metals to prevent galvanic corrosion. SS316 core and laminate ensure no metal-to-metal path across the flange.
Wellhead isolation from interconnected flow lines, valve connections and Christmas Tree connections. Rated up to API 10,000#.
Compressor connections and other high-vibration service where traditional gaskets would relax and leak.
Tanks and heat exchangers with sacrificial anodes to increase anode life. The matched bore eliminates fluid trap corrosion.
Mating mismatched ring-joint (RTJ) to raised-face flanges. Eliminates fluid trap corrosion where high concentrations of CO2, H2S and other aggressive hydrocarbon media are present.
The VCS and PGE kits are both flange isolating gasket kits, but they are designed for different pressure classes and services. The choice depends on the pressure rating, the flange type and the required sealing performance.
| Property | VCS Kit | PGE Kit |
|---|---|---|
| Pressure class | Up to ANSI 2500# and API 10,000# | ANSI Class 150, 300, 600 |
| Flange types | Raised face, full face and RTJ | Raised face and flat face |
| Gasket core | G10 / G11 laminate + SS316 metal core | G10 / G11 laminate |
| Sealing element | Spring-energized PTFE internal face seals | Elastomeric or spring-energized PTFE lip seals |
| Seal groove design | Dovetail-shaped, machined into the metal core | Patented overlapping and offsetting seal grooves |
| Bolt stress required | Far less than standard gaskets | Low required bolt loads |
| Seal replacement | Replaceable in the reusable retainer | Not separately replaceable |
| Typical service | Wellhead, Christmas Tree, RTJ, high-pressure | Low-pressure pipelines, heat exchangers, dissimilar metals |
To order a VCS flange isolating gasket kit correctly, we need the information below for your right application. Send these five items with your enquiry. If you already have a flange drawing or an existing gasket sample, attach it and we will match it directly.
ANSI / ASME, API, MSS, BSI or DIN standard. Raised face, full face or ring type joint (RTJ).
NPS or DN, ANSI Class 150 to 2500 or API 5,000 to 10,000, and the exact bore size so the inner diameter can be matched to the flange bore.
Design pressure, design temperature and the process medium, including CO2 or H2S concentration if present.
G10, G11, Mylar, Phenolic or Nomex for sleeves. G10, G11, G7 or Phenolic for washers. Zinc-plated carbon steel or stainless steel for steel washers.
G10 or G11 for the central big gasket. SS316 or other steel metal for the metal core. Thickness 6.2 mm or 7.8 mm.
Send your flange specification, nominal pipe size, pressure rating, bore size, operating pressure and temperature, media, isolating sleeve and washer material, and central big gasket material. Our sales engineers reply with a firm unit price, lead time and available samples. For urgent wellhead, Christmas Tree or RTJ requirements, contact us by phone or WhatsApp.
Address
No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
