Outer ring(CGType) metal spiral wound gaske
1. Applicable fields
* Petrochemical industry: used for high temperature and high pressure equipment such as reactors, heat exchangers, and pipe flanges.
* Power industry: Sealing of steam systems such as boilers and steam turbines.
* Nuclear industry: radiation and corrosion resistant scenarios.
* Oil refining and natural gas: flange connection seals for pipelines, valves, and pumps.
* Chemical industry: Sealing of highly corrosive media (adaptable materials required).
Mainly used for flat flange (FF) or raised face flange (RF), the outer ring design helps positioning and prevents installation deviation.
3. Applicable working conditions
* High temperature: long-term working temperature can reach 700°C (depending on the material).
* High pressure: the withstand pressure is usually more than 20MPa.
* Alternating load: suitable for scenes with frequent temperature or pressure fluctuations.
4.Performance characteristics
* Multi-layer sealing structure:Metal belts (such as 304/316 stainless steel, titanium alloy)** and non-metallic filling materials (graphite, PTFE, mica) are alternately wound, combining elasticity and strength. The outer ring (positioning ring) is usually made of the same material as the metal belt, providing mechanical support, preventing the winding layer from loosening, and simplifying installation and positioning.
* Excellent sealing:The combination of metal and non-metallic materials realizes "soft-hard" double sealing, which can adapt to small defects on the flange surface. High compression rebound rate (up to 40% or more when graphite is filled). compensating for flange deformation.
5. Installation points:
Control the bolt preload to avoid excessive compression that may cause the filling layer to fail. Check the flange surface roughness (usually Ra≤3.2μm) to ensure that the sealing surface is flat.
The outer ring type metal spiral wound gasket combines metal strength and non-metallic elasticity to provide reliable sealing under harsh working conditions. Its outer ring design further improves the installation accuracy and resistance to working condition fluctuations, making it the preferred solution for high temperature and high pressure flange connections. When selecting, it is necessary to comprehensively consider the media characteristics, flange type and operating conditions to ensure the best sealing effect and service life.








Construction | Flange | Hoop material | Filler | Inner& Outer Material | Size(mm) | Thickness(mm) | ||
Material | Code | V | W | |||||
R/G Basic type | Tongue and Groove | 304 304L 316 316L 321 Alloy 825 Monel 400 Inconel 625 S32750 | Asbestos Graphite PTFE Non-asbestos | ASB FG PTFE NACF | Carbon steel 304(L) 321 316(L) Alloy 825 Monel 400 Inconel 625 S 32750 | 16-3500 | 3.2 4.5 | 4.8 5.5 7.5 |
With outer ring | Raised face Flat face | |||||||
With inner ring | Male and Female | |||||||
Inner& Outer ring | Raised face Flat face | |||||||
For heat exchanger | Heat exchanger |




FAQ:
1. Are you a trading company or manufacturer?
A: We are a manufacturer with more than 30 years of production experience and have our own factory in Hebei.
2. Can you provide OEM or ODM service?
A: Yes, welcome.
3. Can you send me a sample? For free?
A: Yes, the sample is free, but the express fee should be on your side.
4. Is there any discount on the price you offer me?
A: The discounted price depends on the order quantity.
5. What are your payment terms?
A: 30% as deposit, 70% before delivery. Before you pay the balance,
We will show you the photos of the products and packages.
6. How about the delivery time?
A: Usually 15-30 days after receiving the 30% deposit. Samples are ready within 3 days.