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Inner ring(GI Type) metal spiral wound gaske
Inner ring metal spiral wound gasket is a high-performance gasket widely used in industrial sealing. Its structure is usually composed of a metal inner ring, a metal spiral wound tape (such as stainless steel, titanium alloy, etc.) and a non-metallic filling material (such as graphite, asbestos, PTFE, etc.). The following is a detailed description of its main uses and key performance:
1,Main Applications
* High temperature and high pressure sealing:
Applicable to flange connection of pipelines, valves, reactors and other equipment in the fields of petrochemical, electric power, nuclear power, etc., especially suitable for extreme working conditions with temperature between -200ºC and +1000ºC and pressure up to 25MPa or above.
* Complex media environment:
Used to seal corrosive media (such as acid, alkali, oil and gas), toxic gas or liquid, and pipeline systems of high purity fluids, such as hydrogenation units in refineries, reactors in chemical plants, etc.
* Leakage prevention of key equipment:
In nuclear power equipment, aerospace or high-pressure steam systems, as a key sealing element, to prevent safety hazards caused by leakage.
* Dynamic compensation:
In working conditions with slight vibration or thermal expansion, the elastic deformation of the metal winding belt compensates for the slight displacement of the flange surface.
2. Core performance
* Advantages of multi-layer structure
Metal inner ring: provides rigid support to prevent the gasket from being eroded or compressed by the medium, and assists in flange alignment.
Metal and non-metallic layers: metal strips (such as 304/316 stainless steel) provide strength, and non-metallic filling layers (such as flexible graphite) fill micro-defects on the flange surface to achieve double sealing.
* Resistance to extreme conditions
High temperature stability: The graphite filling layer is resistant to high temperatures, and the metal strip maintains strength without creep.
Compression resistance: The metal winding structure disperses pressure to avoid crushing of the sealing surface.
* Sealing reliability
The leakage rate meets international standards (such as ASME B16.20, EN 1514), and can still maintain low leakage under high pressure.Adapt to the surface roughness of the flange (Ra≤3.2μm), reducing the dependence on the processing accuracy of the flange.
* Material adaptability
Metal belts can be made of Inconel, Monel and other alloys, and the filling layer can be made of ceramic fiber, mica, etc., which are suitable for sulfidation, oxidation or strong corrosion environments.
* Long life and convenient maintenance
Strong fatigue resistance, the life can reach several years under frequent start-stop or temperature alternating conditions. It is not easy to stick to the flange surface during replacement, reducing maintenance costs.
3. Selection considerations
*Working condition matching: Select metal and filling materials according to the corrosiveness of the medium, temperature and pressure peaks.
*Flange type: Suitable for flange types such as concave and convex surface (MFM) and tongue and groove surface (TG). The inner ring size must match the inner diameter of the flange.
*Standard certification: Must comply with industry standards such and DIN EN 12560 to ensure safety and compliance.
4. Comparison with other gaskets:
Compared with ordinary asbestos gaskets or rubber gaskets, the inner ring metal wound gasket has better creep resistance and rebound performance; compared with pure metal gaskets (such as toothed gaskets), it has lower requirements for flange flatness and softer sealing.
Through reasonable selection and application, the inner ring metal spiral wound gasket can effectively solve the sealing problem under harsh working conditions and is a key component for preventing leakage of industrial equipment.
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.
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