What is graphite gasket:

Graphite gaskets are mainly cut or stamped from high-purity flexible graphite sheets. It has good compression resilience and excellent temperature resistance, and is commonly used for static sealing at various flange connections

flexibleCharacteristics of graphite:

1. Graphite will not damage the flange and can be tightly combined with commonly used reinforcing substrates for asbestos free gaskets, with good compression resilience

2. Graphite itself is a natural carbon material with no asbestos components. High quality graphite products have no dust shedding, no volatile harmful substances, and comply with environmental regulations such as RoHS and REACH;

3. Graphite is resistant to high and low temperatures, does not soften or melt at high temperatures, and can still maintain compression rebound performance; Not losing elasticity at low temperatures

4. Graphite does not react with most acidic or alkaline media, organic solvents, steam, etc. at room temperature, making it suitable for multi-media scenarios

Of course, there are also some drawbacks:For example:Not resistant to strong oxidantsLow mechanical strength and brittle texture

What are the types of graphite gaskets

1、 Pure graphite gasket

Pure graphite gasket is directly processed from high-purity expanded graphite or molded graphite, without other reinforcing materials, and has "high purity"+Strong corrosion resistance. Characteristics of

2、 Graphite composite gasket

Graphite composite gasket is a gasket made of graphite and reinforced substrate composite. Its process is divided into metal sprinting and bonding. The core purpose is to enhance the strength and pressure resistance of the gasket by strengthening the material, while retaining the sealing and corrosion resistance characteristics of graphite. It is one of the widely used types of asbestos free sealing gaskets.

3、 Graphite wrapped gasket

Graphite wrapped gasket is a gasket formed by spiral winding of metal strip and graphite strip. It is a sealing product under medium and high pressure conditions and is widely used in industries such as petrochemicals, power, and ships

4、 Other types of graphite gaskets

Such as graphite coated gaskets, flexible graphite packing rings (structurally similar to circular graphite gaskets, used for shaft seals in valves, pumps, etc.)

What is the temperature resistance of commonly used graphite

Graphite can be used stably in air until450℃After oxidation protection treatment, it can reach600℃）Under inert atmospheres (such as nitrogen and argon), it can withstand temperatures up to1600℃, far exceeding commonly used fiber rubber gaskets (≤250℃), low temperature can reach- 200℃

If the working condition exceeds 400 ℃ in aerobic environment, it is recommended to use mica composite board (ST-4376, ST-5326) or our metal reinforced asbestos free board (ST-2067)

What are the application industries:

1. In the chemical industry, equipment often comes into contact with acids, bases, organic solvents, toxic and harmful media (such as hydrochloric acid, sulfuric acid, methanol, chlorine gas), and needs to meet both "corrosion resistance and non leakage" and "environmental compliance" requirements. Typical equipment includes reaction vessels (enamel reaction vessels, stainless steel reaction vessels), plate heat exchangers, chemical process pipelines, etc

2.Energy industry: commonly used equipment includes boiler systems in the power industry (thermal power, nuclear power)

3. In the general machinery industry, there are various sealing scenarios that require a combination of "strength, rebound, and adaptability to different flange accuracies". Typical equipment includes air compressors (screw, reciprocating), etc

Common graphite material models:

SealTex：ST-9916/ST-9926Metal graphite composite plate,ST-9010Pure graphite gasket,ST-2060Fiber reinforced graphite sealing gasket

AustriaTEADITTeddy：GR1700/GR1701High temperature graphite sheet with embedded components

SpainMontero：BELPAGRAF

French : novaphit VS，SSTC，MST；News PREMIUM XP

Klinger：GRAPHITE LAMINATE PSM/SLS