Rubber-Steel Gasket
Model:KWG
The rubber-steel gasket fits itself to the surface of the flange. Also when the flange mis-matches, or when there are minor damages to the flange. The rubber-steel gasket has a steel insert and is available in three types. We are happy to advise you about the possibilities. The rubber steel lined gasket is suitable for gas, water, and drinking water applications. For example, in water companies and GRP (pipeline) systems. The sealing is also widely applied in the (petro) chemical industry, the pharmaceutical industry, steel factories and power plan
KWG Rubber-Steel Gaskets combine a corrosion-resistant steel insert with a flexible rubber sealing profile. They self‑center, conform to flange irregularities, and absorb high surface pressures. Ideal for gas, water, drinking water, chemical, pharmaceutical, and power plant applications. Available in multiple rubber compounds (NBR, EPDM, FKM, etc.) and three design types. Custom sizes and shapes supplied quickly. Request a quote →
KWG Rubber-Steel Gasket – Reliable Sealing with Metal Reinforced Stability
Kaxite Sealing offers the KWG Rubber-Steel Gasket – a high‑performance sealing solution that marries the flexibility of rubber with the strength of a steel insert. This gasket type is designed to accommodate flange misalignment, surface imperfections, and fluctuating bolt loads. The rigid steel core absorbs high compressive forces while the rubber profile conforms to the flange face, ensuring a tight, leak‑free seal even under demanding conditions.
Our rubber‑steel gaskets are available in three standard configurations (Type A, B, and C) and can be manufactured in virtually any size or shape. They are widely used in water distribution networks, GRP piping systems, chemical plants, food processing, and power generation. The self‑centering design simplifies installation and reduces the risk of misalignment. Contact our engineering team for material selection advice and flange compatibility.
Steel InsertCorrosion‑resistant steel (galvanised / stainless)
Rubber OptionsNBR, EPDM, FKM, CR, NR, Silicone
Temperature Range-40°C to +200°C (depending on rubber)
Pressure RatingUp to PN40 / Class 300
TypesA (flat), B (with rib), C (with support O‑ring)
Why Choose KWG Rubber-Steel Gaskets?
- ✅ Self‑Centering Design – Simplifies installation and ensures proper alignment.
- ✅ Conforms to Flange Irregularities – Compensates for minor surface damage or misalignment.
- ✅ High Compression Resistance – Steel insert absorbs bolt loads without crushing.
- ✅ Wide Media Compatibility – Choose from NBR, EPDM, FKM, etc. for water, oil, chemicals, or steam.
- ✅ Long Service Life – Excellent resistance to aging, ozone, and weathering.
- ✅ Cost‑Effective for Large Diameters – Reliable sealing at a competitive price.
Available Types – Choose the Right Configuration
Kaxite offers three standard rubber‑steel gasket designs to suit different flange faces and pressure requirements.
Type A – Flat Design
The basic version with a flat rubber profile and a solid steel core. Ideal for standard raised‑face flanges and general‑purpose sealing of water, air, and non‑aggressive media.
Type B – With Rib (Concentric or Spiral)
Features raised ribs on the sealing face that create a labyrinth seal, improving performance under pressure fluctuations and thermal cycling. Often used in gas and chemical service.
Type C – With Support O‑Ring
An additional O‑ring is integrated into the profile to provide an extra sealing barrier and improve low‑pressure sealing. Recommended for vacuum and critical leakage applications.
* Custom profiles, non‑standard sizes, and special rubber compounds are available upon request. Contact us with your drawing or specification.
ISO 9001:2015 Custom Sizes & Shapes Multiple Rubber Compounds Self‑Centering Fast Delivery
Key Advantages of KWG Rubber-Steel Gaskets
Excellent Conformability – The rubber profile adapts to flange surface irregularities, including minor scratches, pitting, or warpage.
Robust Steel Core – Prevents extrusion and maintains sealing pressure even under bolt relaxation or thermal expansion.
Chemical Resistance – Choose from NBR (oil), EPDM (water/steam), FKM (aggressive chemicals), or silicone (high temperature).
Self‑Centering Feature – The steel insert ensures the gasket remains centred during installation, reducing assembly time.
Wide Service Temperature – Depending on rubber grade, from -40°C to +200°C, making them suitable for hot water, steam, and low‑temperature applications.
Cost‑Effective – Compared to solid metal or spiral wound gaskets, rubber‑steel offers a lower‑cost alternative for many standard flanged connections.
Technical Specifications – KWG Rubber-Steel Gasket
Typical properties based on NBR rubber with galvanised steel insert. Values may vary with rubber compound and design.
| Property | Value / Range | Notes |
|---|---|---|
| Rubber Material | NBR, EPDM, FKM, CR, NR, Silicone | Select based on media and temperature |
| Steel Insert | Galvanised mild steel, SS304, SS316 | Stainless for aggressive environments |
| Service Temperature (NBR) | -30°C to +100°C | Higher with FKM/Silicone |
| Service Temperature (EPDM) | -40°C to +150°C | Suitable for hot water / steam |
| Max. Pressure | PN40 / Class 300 (depending on size) | Larger sizes may have lower rating |
| Size Range | DN15 to DN3000+ (any custom size) | Round, oval, rectangular, or custom shape |
| Hardness (Shore A) | 70 ± 5 (standard) | Softer/harder compounds available |
| Compression Set | ≤ 25% (NBR, 70°C/24h) | Excellent recovery |
| Standards | DIN 2690, BS 7074, EN 1514-4 | Custom designs available |
* All specifications are typical. Custom rubber compounds, steel grades, and sizes can be supplied. Contact our technical team for application‑specific data.
Typical Applications & Industries
Water Supply & Distribution Drinking water pipelines, pumping stations, and GRP/FRP pipe joints.
Chemical & Petrochemical Flange connections in processing lines handling acids, solvents, and hydrocarbons.
Pharmaceutical & Food Sanitary flanges, CIP piping, and clean‑room environments (EPDM/FKM grades).
Power Generation Cooling water systems, steam lines, and condenser connections.
Marine & Offshore Ballast systems, seawater intake, and exhaust flanges.
Water Treatment Filter housings, valve connections, and chlorination systems.
Why Partner with Kaxite for Rubber-Steel Gaskets?
30+ Years of Experience – Kaxite has been manufacturing sealing products since 1990, with deep expertise in rubber‑to‑metal bonding and gasket design.
ISO 9001:2015 Certified – Rigorous quality control from raw material to finished product, including batch traceability.
Custom Manufacturing – Any size, shape, rubber compound, or steel grade – we produce to your prints or reverse‑engineer existing gaskets.
Competitive Factory Pricing – Direct supply eliminates intermediaries, offering you the best value.
Fast Turnaround – Standard sizes ship within 5‑7 business days; custom orders typically 10‑15 days.
Technical Support – Our engineers assist with material selection, flange loading, and installation advice.
Proven Reliability: Kaxite’s rubber‑steel gaskets are trusted by water utilities, chemical plants, and power stations worldwide for their consistent quality and long service life.
Quality Assurance & Compliance
All KWG rubber‑steel gaskets are manufactured under strict quality controls in our ISO 9001:2015 facility. We perform dimensional verification, hardness testing, and visual inspection on every batch. Material test certificates (MTCs) and, where required, FDA, WRAS, or DVGW approvals can be supplied. Our gaskets comply with DIN 2690, EN 1514‑4, and BS 7074 standards.
- ISO 9001:2015
- 100% Dimensional Inspection
- Material Traceability
- WRAS / FDA / DVGW Options
- DIN / EN / BS Compliant
Custom Manufacturing & OEM Services – Free Design Review
We specialise in custom‑engineered rubber‑steel gaskets. Whether you need a non‑standard size, an irregular shape, a special rubber compound, or a specific steel grade, our team can deliver. Send us your drawing or flange details for a rapid quotation.
- Custom diameters from DN15 to DN3000+
- Any shape – round, oval, rectangular, or complex
- Rubber compounds: NBR, EPDM, FKM, CR, NR, Silicone, and custom blends
- Steel inserts: galvanised, SS304, SS316, or other alloys
- Special surface finishes and colour coding
- Private labelling and custom packaging available
Request a free design review or ask for a bulk quote – our team responds within 24 hours with competitive pricing and lead‑time estimates.
Frequently Asked Questions About Rubber-Steel Gaskets
- Q: What rubber compounds are available?
- A: We offer NBR (oil/fuel resistant), EPDM (water/steam/weathering), FKM (high temperature/chemicals), CR (ozone/weathering), NR (general purpose), and Silicone (extreme temperatures). Custom compounds are also available.
- Q: Are these gaskets suitable for drinking water?
- A: Yes, when manufactured with EPDM or NBR grades that meet WRAS, NSF, or DVGW standards. We can supply certified materials upon request.
- Q: Can the steel insert be made of stainless steel?
- A: Absolutely. We offer SS304 and SS316 inserts for corrosive environments, as well as galvanised mild steel for standard applications.
- Q: What is the maximum pressure these gaskets can handle?
- A: Typically up to PN40 / Class 300 for standard sizes. Larger diameters may have lower pressure ratings. Always consult our engineering team for your specific flange design.
- Q: Can you produce non‑round shapes?
- A: Yes, we manufacture oval, rectangular, and custom‑shaped gaskets to match any flange or equipment opening. Provide a drawing or template for a quick quotation.
Partner with Kaxite Sealing – your trusted manufacturer of rubber‑steel gaskets. With extensive material expertise, custom manufacturing capabilities, and a commitment to quality, we deliver sealing solutions that perform reliably in water, chemical, and industrial applications. Request a free design review or get a tailored bulk quote today – our engineering team responds within 24 hours.
Hot Tags: Rubber-Steel Gasket, Metal Insert Gasket, Rubber Lined Gasket, Flange Sealing Gasket, EPDM Gasket, Custom Gasket, KWG Gasket
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