Gaskets

Spiral Wound Gaskets TENSOGRAPH®

Spiral wound gaskets (SWG) are reliable and easy to use gaskets with the highest-quality flexibility and recovery for applications at high and fluctuating temperatures and pressures. SWG's have been widely applied as static seals in standard flanged joints as well as in pumps, valves and other special equipment. SWG's allow lower clamping forces compared to solid gaskets.

Unichimtek produces SWG with/without inner/outer guide-ring arrangements.

Standard compliance:
ANSI, EN, DIN,GOST,OST, and custom design

Sizes available:
From 12mm up to 4000 mm
(Oval SWG and SWG with internal bars upon request)

Filler material:
Graphite, high purity graphite, PTFE
(mica, сeramic and others options upon request)

Material for winding strip and inner rings:
Stainless steel (304, 316L, 316 Ti, 321), Monel 400,
(Inconel,Hastelloy, Nickel, Titan upon request)

Material for outer rings:
Carbon steel (painted)
Stainless steel (304, 316L, 316 Ti, 321),Monel 400
(Inconel, Hastelloy, Nickel, Titan upon request)

Related products:
Applications:
  • Oil and gas industry
  • Power generation plants
  • Chemical, atomic and marine industry
Main features:
  • High reliability
  • Easy to use
  • Resistant to cycling
  • Lower clamping forces needed

Kammprofile Gaskets TENSOGRAPH®

Extremely tight gaskets for high pressure and temperature applications. Pressure limit up to 80 MPa and temperature limit of 450-1100oC is available upon material choice.

Kammprofile gaskets are made of concentrically grooved metal core covered by soft filler such as graphite, PTFE or mica. Rigid core of cam-profile gasket provides great reliability even in huge diameters, efficiently resists uneven bolt tensioning and over-compression. Soft layer allows to fit  seating surface's imperfections.

Main application of gaskets are flange seals in extreme conditions of exploitation as well as sealing of heat exchangers.

Profile:
Plain and Convex style

Standard compliance:
ANSI, EN, DIN, GOST, OST, and custom design

Sizes available:
From 23 mm up to 4000 mm

Soft material:
Graphite, PTFE or mica

Rigid core material:
Stainless steel (304, 316L, 316 Ti, 321, Monel, Inconel)

Related products:
Applications:
  • Oil and gas industry
  • Power generation plants
  • Petrochemical plants
  • Process industry
Main features:
  • High pressure and temperature limit
  • Extremely tight
  • Resistant to uneven bolt tensioning and over-compression
  • Reliable at huge diameters

Corrugated Gaskets TENSOGRAPH®

Reliable and easy to use gasket for standard flange sealing or heat exchanger applications.

Rigid base is a corrugated solid metal core ring with soft graphite layer bonded to both sides. Low seating stress and high tightness level make it an excellent choice for sealing of flanges with limited bolt tension capability and non-critical operation conditions. Corrugated gaskets are easy to install and replace and are less sensitive to assembly faults.

Corrugated gaskets have an optimal thermo-cycling resistance and blow-out safety alongside with pressure and temperature performance. Construction of gasket and usage of TENSOGRAPH® ultra-pure graphite foil makes possible exploitation of gaskets in permanent temperatures up to 350-400oC and transient of up to 450 C and 600oC with use of oxidation inhibitors. Pressure ranges up to 50 bars (5 MPa) and 100 bars (10 MPa) are available.

Standard compliance:
ANSI, EN, DIN, GOST, OST, and custom design

Sizes available:
From 18 mm up to 4000 mm

Soft material:
Graphite, high purity graphite

Rigid core material:
Stainless steel (304, 316L, 316 Ti, 321)

Related products:
Applications:
  • Oil and gas
  • Power generation plants
  • Chemical and petrochemical industry
  • Power and petrochemical plants
Main features:
  • High reliability and gas tightness
  • Possibility to provide tight sealing with low stress
  • Easy handling
  • High resistance to chemicals
  • Smart choice for non-critical applications

Reinforced graphite gaskets TENSOGRAPH®

Graphite flange gaskets are manufactured of TENSOGRAPH® plain and reinforced graphite sheets with implementing of a wide range of additional options such as inner/outer or both eyelets and any type of guide rings.

Precise cutting allows to produce reinforced graphite gaskets with any shape and with dimensions up to 1500 mm. Exclusive technology of Unichimtek makes possible to produce an eyeleted flat gaskets with design of any complexity which is a problem solver for sealing of non-standard flanges.

Gaskets application is possible in temperature range up to 450oC in case of contact with air, up to 600oC in case of water and steam and under pressure up to 50MPa.

Flat, tanged (perforated) and multilayer reinforcements are available.

Inner ring to avoid over-compression could be applied.

Standard compliance:
ANSI, EN, DIN,GOST,OST, and custom design

Sizes available:
Outer diameter up to 1500 mm

Material:
Graphite with reinforcement of perforated and plain s/s layer

Reinforcement material:
Stainless steel (316L, 321, 430), aluminium and other on request 

Related products:
Applications:
  • Oil and gas industry
  • Power generation plants
  • Chemical and petrochemical industry
  • Petrochemical plants
Main features:
  • High temperature and pressure limit
  • High resistance to chemicals
  • Easy installation
  • Can be manufactured with custom design

Metal-jacketed gaskets TENSOGRAPH®

Metal-jacketed gaskets are most flexible in terms of shape metal-graphite gaskets which are typically used for sealing of heat exchangers’ flanges. Metal-jacket provides blow–out resistance and compressive strength whereas filler material forces metal jacket to deform due to flange defects.

A wide range of outer metal-jackets and filler material options is available to suit most of operating conditions. Different options of design for inner bars can be applied: welded and integrated bars.

Designs of gasket and usage of different sealing materials such as TENSOGRAPH® ultra-pure graphite foil, PTFE, mica, ceramics with wide combination of resistant metal-jacketed cores makes possible exploitation of gaskets in permanent temperatures up to 350-450 oC and transient of up to 800oC . Pressure range up to 400 bar (40 MPa) is available.

Standard compliance:
ANSI, EN, DIN, GOST, OST, and custom design

Soft material:
Graphite, high purity graphite, PTFE
(mica, сeramics and others upon request)

Rigid core material:
Stainless steel (304, 316L, 316 Ti, 321)
Monel, Inconel, Copper, Aluminum and other on request



Related products:
Applications:
  • Oil and gas industry
  • Power generation plants
  • Chemical and petrochemical industry
  • Power and petrochemical plants
  • Heat exchangers
Main features:
  • Many types of design and materials
  • High temperature limit and resistance to chemicals
  • Easy installation
  • Can be manufactured with custom design

Graphite wound gaskets TENSOGRAPH®

Graphite wound gaskets are manufactured of TENSOGRAPH®  graphite foil by a special technology of Unichimtek  similar to graphite rings production technology.

This type of gaskets is highly efficient for sealing of ‘tongue-groove’ flanges and shaft connection to ball and gate in valve. Inner structure of gasket allows filling of closed volume and provides secure sealing. Wide range of additional options such as inner/outer or both eyelets and any type of guide ring to avoid contact with aggressive media is available on request.

Graphite wound gaskets are manufactured with a cold pressing technology and have a density in range between 1,2 – 1,9 g/cm3 depending on conditions of usage.

Anti-adhesive and gas anti-leakage treatment for gaskets might also be applied on request.

Application of graphite wound gaskets is possible in temperature range up to 450C in case of contact with air, up to 600C in case of water and steam and under pressure up to 40MPa.

Standard compliance:
ANSI, EN, DIN, GOST, OST, and custom design

Sizes available:
Outer diameter from 9 mm up to 1310 mm

Material:
Graphite, Ultra-pure graphite



Related products:
Applications:
  • Oil and gas industry
  • Nuclear power stations
  • Chemical and petrochemical industry
  • Petrochemical plants
Main features:
  • Efficient for sealing of tongue-groove flanges and shaft connection of valves
  • High resistance to chemicals
  • Exclusive technology
  • Can be manufactured with custom design
  • Extra-purity of graphite
  • Easy installation

Non-reinforced graphite gaskets TENSOGRAPH®

Non-reinforced graphite gaskets TENSOGRAPH® are manufactured of pure graphite sheets with implementing a wide range of additional options such as inner/outer or both eyelets and any type of guide ring to avoid contact with aggressive media.

CAM assisted cutting shops allows to produce gaskets with any shape and with outer diameter of round ones up to 1500 mm.

Anti-adhesive and gas anti-leakage treatment for gaskets might be applied.

Non-reinforced graphite gaskets TENSOGRAPH® are aimed for application in raised-face flanges and suitable even for delicate ones. Application is possible in temperature range up to 450C in case of contact with air, up to 600C in case of water and steam and under pressure up to 40MPa.

Standard compliance:
ANSI, EN, DIN, GOST, OST, and custom design

Sizes available:
Outer diameter up to 1500 mm

Material:
Ultra-pure graphite


Related products:
Applications:
  • Oil and gas industry
  • Power generation plants
  • Chemical and petrochemical industry
Main features:
  • High temperature limit and resistance to chemicals
  • Can be manufactured with custom design
  • Easy installation
  • Extra-purity of graphite

Soft material non-asbestos gaskets TENSOGRAPH®

Soft gasket sheet material is produced of mineral and aramid fibers and NBR-based binder. Material is mainly aimed for applications in oil industry pipelines and connection as well as for steam, water (including potable), petrol and natural gas. Temperature of exploitation is 300oC under maximal pressure of 10 MPa. 

CAM assisted cutting shops allows to produce gaskets with any shape and with outer diameter of round ones up to 1500 mm.

Thickness available: 
0,3 - 6,0 mm

Related products:
Applications:
  • Oil and petrochemical industry
  • Hydropower
Main features:
  • Soft and easy to cut material
  • Oil resistant
  • Suitable for potable water