Customizable seat materials available for our valves
Practical guide where we review the mechanical and chemical qualities of our available seat materials to illustrate your choice.
BUNA SEATS
Synthetic rubber obtained through the polymerization of 1,3-Butadiene, also known as Nitrile, is excellent for applications of derivatives of oil and water . Its color is black and it may have a red dot. It does not resist high temperatures.
Mechanical and chemical properties
- Hardness limit: 40 to 95º Shores
- Specific weight: 1,46 grs./cm3
- Temperature range: -15 + 90º C
- Breaking load: 40 Kg / cm2
- Elongation: 250%
PSI
Features
- Good mechanical properties
- Excellent resistance to fats and oils
- Excellent resistance to aliphatic hydrocarbons
- Good resistance to abrasion
Applications
- Water: Good
- Oils: Good
- Acids: Regular
- Bases: Good
- Ozone: Not applicable
- Gasoline: Excellent
DELRIN SEATS
It is a polymer, also called polyacetal, acetal or polyformaldehyde, it is a crystalline thermoplastic that works at high pressure and low temperature . Excellent dimensional stability. Abrasion high resistance. It has high mechanical resistance, rigidity, and hardness. Its color is crystalline white although it can be colored. This material should not be used in oxygen service, or under UV rays, or alkali acids.
Mechanical and chemical properties
- Tensile modulus: 2900 MPa
- Yield stress: 71 MPa
- Lengthening. in elastic limit: 26%
- Lengthening. nominal at break: 45%
- Abrasion resistance: 4 mm³
- Temperature range: -55ºC + 82ºC
- Heat stability, 1.80 MPa: 95 ° C
- Heat stability, 0.45 MPa: 160
PSI
Features
- High mechanical resistance
- Good tribological properties
- Electrical insulator
- Good chemical resistance
- Good machinability
- Easy to polish
Applications
- Oils: Good
- Acids: Not applicable
- Alcohols: Excellent
- Bases: Not applicable
- Ethers: Good
- Hydrocarbons: Excellent
- Oxygen: Not applicable
- Gasoline: Excellent
DEVLON® SEATS
This thermoplastic is among the strongest and most abrasion resistant of all seat materials. Inherently stress-free with excellent properties, with greater resistance to pressure and temperature than most soft seats, low friction and improved shock tolerance. It is yellow or green in color.
Mechanical and chemical properties
- Density: 2900 MPa
- Hardness: 71 MPa
- Water absorption: in elastic limit: 26%
- Compressive strength: 45%
- Temperature range: -35ºC + 200ºC
PSI
Features
- High mechanical resistance
- Wear resistance
- Impact resistance
- Low moisture absorption
Applications
- Oils: Excellent
- Acids: Regular
- Alcohols: Excellent
- Bases: Good
- Ether: Excellent
- Ozone: Regular
- Gasoline: Excellent
EPDM SEATS
It is a low-density synthetic rubber with good resistance to abrasion and high resistance to alcohols, acids and mild alkalis. Our WRAS certified EDPM can be used in drinking water as it does not release microparticles. Not recommended for strong acids, oils or petroleum . It should not be used in compressed air lines.
Mechanical and chemical properties
- Hardness limit: 30 to 90º Shores
- Specific weight: 1,30 grs./cm3
- Temperature range: -60 + 100ºC
- Breaking load: 40Kg / cm2
- Elongation: 200%
PSI
Features
- Good resistance to abrasion
- Very good weather resistance
- Good electrical insulator
- Good chemical resistance
Applications
Drinking water: Excellent
Oils: Not applicable
Acids: Excellent
Bases: Excellent
Ozone: Excellent
Gasoline: Poor
HYPALON SEATS
It is a synthetic rubber with excellent resistance to abrasion , it resists most inorganic chemicals, except color, concentrated acids and oxidants . Good flame resistance and is self-extinguishing. It cannot be used with steam.
Mechanical and chemical properties
- Hardness limit: 65º Shores
- Specific weight: 1,38grs. / cm3
- Temperature range: -35 + 140ºC
- Breaking load: 90Kg / cm2
- Elongation: 350%
PSI
Features
- Very good mechanical resistance
- It has a resistance similar to that of other types of elastomers, but lower than that of natural rubber
- Its resistance to bending is extraordinary
- Hypalon does not propagate combustion
Applications
- Water: Excellent
- Oils: Regular
- Acids: Good
- Bases: Good
- Ozone: Good
- Gasoline: Excellent
NEOPRENE SEATS
Synthetic rubber with excellent mechanical and abrasion properties , regarding its chemical resistance , it is resistant to inorganic chemicals except oxidizing acids and halogens . It is not resistant to most organic compounds, except alcohols . It is used mainly in the pulp industry.
Mechanical and chemical properties
- Hardness limit: 40 to 95º Shores
- Specific weight: 1,45 grs./cm3
- Temperature range: -20 + 100º C
- Breaking load: 60 Kg / cm2
- Elongation: 300%
PSI
Features
- Excellent mechanical properties, bending, traction and compression.
- Very good mechanical properties
- Excellent resistance to sun, ozone and weather
- Good resistance to solvents and dilute acids and detergents
- Very good dielectric strength
Applications
- Water: Excellent
- Oils: Not applicable
- Acids: Not applicable
- Bases: Excellent
- Ozone: Good
- Gasoline: Good
NYLON SEATS
It is a polymer that offers an optimal combination of mechanical resistance, wear resistance, rigidity and toughness . It is characterized by having a very good resistance to fatigue and good dielectric properties. Polyamides, in addition to high hardness and toughness, also have a high resistance to thermal deformation (resistance to temperatures of -40º C +100 ºC).
Mechanical and chemical properties
- Hardness: & gt; 136 N / mm2
- Hardness limit: 75º Shores
- Temperature range: -40 + 90º C
- Impact resistance: 3.8 KJ / m2
- Tensile strength: 78 N / mm2
- Elongation at break: 50%
- Thermal Conductivity: 0.28 w / Km
PSI
Features
- High strength and rigidity
- High shock resistance and resilience
- High resistance to heat deformation
- High damping power
- Good sliding properties
- Good resistance to fatigue
- Easy to machine
- Good resistance to chemicals such as organic solvents and fuels
Applications
- Water: Not applicable
- Salt water: Good
- Oils: Excellent
- Acids: Not applicable
- Ether: Good
- Gasoline: Excellent
PEEK SEATS
It is a polymer with a very good ability to work at high pressure and temperature , which leads it to be used in applications previously reserved only for metals, since it behaves excellently under conditions of dynamic loading . It has excellent resistance to abrasion, radiation and is chemically resistant to most fluids except sulfuric and highly oxidizing acids.
Mechanical and chemical properties
- Compressive strength: 118 MPa
- Ductility: 50% elongation at break
- Coefficient of dynamic friction: 0.25
- Bending modulus: 4.1 GPa
- Hardness: 125 Rockwell R
- Density: 1320 Kg / m3
- Dielectric constant: 50% elongation at break
- Dielectric strength: 18.9 MV / m
- Electrical conductivity: SIGC 3.45E-21%
- Electrical resistivity: 5.0E + 23 nΩ-m
- Water absorption: 0.1%
PSI
Features
- Very high thermal resistance
- Very high creep resistance
- Very high resistance to thermal deformation
- High resistance to hydrolysis
- Very high strength and rigidity
- Very good dimensional stability
- Very good dielectric and insulating properties
Applications
Water: Excellent
Salt water: Excellent
Oils: Excellent
Oils Minerals: Excellent
Acids: Regular
Food: Excellent
Halogenated hydrocarbons: Excellent
Solvents: Excellent
Greases: Excellent
Transmission fluids: Excellent
Refrigerants: Excellent
RPTFE SEATS
RPTFE is a polymer similar to polyethylene, in which hydrogen atoms have been replaced by fluorine atoms . The chemical formula of the monomer, tetrafluoroethene, is CF2 = CF2. Among them are the PFA (perfluoroalkoxide) resin and the FEP (Flurinated Ethylene Propylene) copolymer, called PFA and FEP respectively. Both PFA and FEP share the characteristic properties of PTFE, offering greater ease of handling in their industrial application.
Mechanical and chemical properties
- Density: 2.18 g / cm3
- Hardness: 51º Shores
- Temperature range: -45ºC + 230ºC
- Tensile strength: 315 Kg / cm2
- Elongation: 68 MPa
- Does not break on impact
- Dielectric resistance: 48 Ohm
- Volumetric resistivity: 10 ^ -18 Ω-cm
PSI
Features
- Inert, does not react with other chemical substances except in very special situations.
- Toxicity is practically nil
- Minimum coefficient of friction
- Great impermeability
- Great electrical insulator
- Great flexibility
- UV resistance
- Non-stick
Applications
Water: Excellent
Salt water: Excellent
Oils: Excellent
Oils Minerals: Excellent
Acids: Excellent
Food: Excellent
Halogenated hydrocarbons: Excellent
Solvents: Excellent
Greases: Excellent
Transmission fluids: Excellent
Refrigerants: Excellent
VITON SEATS
It is a fluorinated rubber with extraordinary resistance to temperature . It is the best elastomer for high temperature applications, but not in steam, it does not spread the flame and is self-extinguishing. It is the synthetic rubber more resistant to hydrocarbons both aliphatic aromatic and chlorinated.
Mechanical and chemical properties
- Hardness limit: 50 to 90º Shores
- Specific weight: 2.00 grs./cm3
- Temperature range: -30 + 250º C
- Breaking load: 70 Kg / cm2
- Elongation: 220%
PSI
Features
- Very good mechanical resistance
- Good resistance to heat and flame
- Good resistance to abrasion and aging
- Excellent resistance to petroleum derivatives
- Excellent resistance to aliphatic and aromatic solvents, chlorines, strong acid detergents, oxidizing acids and dilute acids.
Applications
Water: Excellent
Salt water: Excellent
Oils: Excellent
Bases : Excellent
Ozones: Excellent
Gasoline: Excellent
If you have doubts about which more materials from seats available for our valves do not hesitate to contact us.
Seat materials available for our valves
Practical guide where we review the mechanical and chemical qualities of our available seat materials to illustrate your choice.
BUNA SEATS
Synthetic rubber obtained through the polymerization of 1,3-Butadiene, also known as Nitrile, is excellent for applications of derivatives of oil and water . Its color is black and it may have a red dot. It does not resist high temperatures.
Mechanical and chemical properties
- Hardness limit: 40 to 95º Shores
- Specific weight: 1,46 grs./cm3
- Temperature range: -15 + 90º C
- Breaking load: 40 Kg / cm2
- Elongation: 250%
Features
- Good mechanical properties
- Excellent resistance to fats and oils
- Excellent resistance to aliphatic hydrocarbons
- Good resistance to abrasion
Applications
- Water: Good
- Oils: Good
- Acids: Regular
- Bases: Good
- Ozone: Not applicable
- Gasoline: Excellent
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DELRIN SEATS
It is a polymer, also called polyacetal, acetal or polyformaldehyde, it is a crystalline thermoplastic that works at high pressure and low temperature . Excellent dimensional stability. Abrasion high resistance. It has high mechanical resistance, rigidity, and hardness. Its color is crystalline white although it can be colored. This material should not be used in oxygen service, or under UV rays, or alkali acids.
Mechanical and chemical properties
- Tensile modulus: 2900 MPa
- Yield stress: 71 MPa
- Lengthening. in elastic limit: 26%
- Lengthening. nominal at break: 45%
- Abrasion resistance: 4 mm³
- Temperature range: -55ºC + 82ºC
- Heat stability, 1.80 MPa: 95 ° C
- Heat stability, 0.45 MPa: 160
Features
- High mechanical resistance
- Good tribological properties
- Electrical insulator
- Good chemical resistance
- Good machinability
- Easy to polish
Applications
- Oils: Good
- Acids: Not applicable
- Alcohols: Excellent
- Bases: Not applicable
- Ethers: Good
- Hydrocarbons: Excellent
- Oxygen: Not applicable
- Gasoline: Excellent
DEVLON® SEATS
This material is among the strongest and most abrasion resistant thermoplastics . Intrinsically stress-free with excellent properties, with greater resistance to pressure and temperature than most soft seats, low friction and improved shock tolerance. It is yellow or green in color.
Mechanical and chemical properties
- Density: 2900 MPa
- Hardness: 71 MPa
- Water absorption: in elastic limit: 26%
- Compressive strength: 45%
- Temperature range: -35ºC + 200ºC
Features
- High mechanical resistance
- Wear resistance
- Impact resistance
- Low moisture absorption
Applications
- Oils: Excellent
- Acids: Regular
- Alcohols: Excellent
- Bases: Good
- Ether: Excellent
- Ozone: Regular
- Gasoline: Excellent
EPDM SEATS
It is a low-density synthetic rubber with good resistance to abrasion and high resistance to mild alcohols, acids and alkalis. Our WRAS certified EDPM can be used in drinking water as it does not release microparticles. Not recommended for strong acids, oils or petroleum . It should not be used in compressed air lines.
Mechanical and chemical properties
- Hardness limit: 30 to 90º Shores
- Specific weight: 1.30 grs./cm3
- Temperature range: -60 + 100ºC
- Breaking load: 40Kg / cm2
- Elongation: 200%
Features
- Good abrasion resistance
- Very good weather resistance
- Good electrical insulator
- Good chemical resistance
Applications
Drinking water: Excellent
Oils: Not applicable
Acids: Excellent
Bases: Excellent
Ozone: Excellent
Gasoline: Poor
HYPALON SEATS
It is a synthetic rubber with excellent resistance to abrasion , it resists most inorganic chemicals, except color, concentrated acids and oxidants . Good flame resistance and is self-extinguishing. It cannot be used with steam.
Mechanical and chemical properties
- Hardness limit: 65º Shores
- Specific weight: 1.38grs. / cm3
- Temperature range: -35 + 140ºC
- Breaking load: 90Kg / cm2
- Elongation: 350%
Features
- Very good mechanical resistance
- It has a resistance similar to that of other types of elastomers, but lower than that of natural rubber
- Its resistance to bending is extraordinary
- Hypalon does not propagate combustion
Applications
- Water: Excellent
- Oils: Regular
- Acids: Good
- Bases: Good
- Ozone: Good
- Gasoline: Excellent
NEOPRENE SEATS
Synthetic rubber with excellent mechanical and abrasion properties , regarding its chemical resistance , it is resistant to products inorganic chemicals except oxidizing acids and halogens . It is not resistant to most organic compounds, except alcohols . It is used mainly in the pulp industry.
Mechanical and chemical properties
- Hardness limit: 40 to 95º Shores
- Specific weight: 1.45 grs./cm3
- Temperature range: -20 + 100º C
- Breaking load: 60 Kg / cm2
- Elongation: 300%
Features
- Excellent mechanical properties, bending, traction and compression.
- Very good mechanical properties
- Excellent resistance to sun, ozone and weather
- Good resistance to solvents and dilute acids and detergents
- Very good dielectric strength
Applications
- Water: Excellent
- Oils: Not applicable
- Acids: Not applicable
- Bases: Excellent
- Ozone: Good
- Gasoline: Good
NYLON SEATS
It is a polymer that offers an optimal combination of mechanical resistance, wear resistance, rigidity and toughness d. It is characterized by having a very good resistance to fatigue and good dielectric properties. Polyamides, in addition to high hardness and toughness, also have high resistance to thermal deformation (resistance to temperatures of -40º C +100 ºC).
Mechanical and chemical properties
- Hardness: & gt; 136 N / mm2
- Hardness limit: 75º Shores
- Temperature range: -40 + 90º C
- Impact resistance: 3.8 KJ / m2
- Tensile strength: 78 N / mm2
- Elongation at break: 50
- Thermal Conductivity: 0.28 w / Km
Features
- High strength and stiffness
- High shock resistance and resilience
- High resistance to heat deformation
- High damping power
- Good sliding properties
- Good resistance to fatigue
- Easy to machine
- Good resistance to chemicals such as organic solvents and fuels
Applications
- Water: Not applicable
- Salt water: Good
- Oils: Excellent
- Acids: Not applicable
- Ether: Good
- Gasoline: Excellent
PEEK SEATS
It is a polymer with a very good ability to work at high pressure and temperature , which leads it to be used in applications previously reserved only for metals, since which performs excellently under dynamic load conditions . It has excellent resistance to abrasion, radiation and is chemically resistant to most fluids except sulfuric and highly oxidizing acids.
Mechanical and chemical properties
- Compressive strength: 118 MPa
- Ductility: 50% elongation at break
- Coefficient of dynamic friction: 0.25
- Bending modulus: 4.1 GPa
- Hardness: 125 Rockwell R
- Density: 1320 Kg / m3
- Dielectric constant: 50% elongation at break
- Dielectric strength: 18.9 MV / m
- Electrical conductivity: SIGC 3.45E-21%
- Electrical resistivity: 5.0E + 23 nΩ-m
- Water absorption: 0.1%
Features
- Very high thermal resistance
- Very high creep resistance
- Very high resistance to thermal deformation
- High resistance to hydrolysis
- Very high strength and rigidity
- Very good dimensional stability
- Very good dielectric and insulating properties
Applications
Water: Excellent
Salt water: Excellent
Oils: Excellent
Mineral oils: Excellent
Acids: Regular
Food: Excellent
Halogenated hydrocarbons: Excellent
Solvents: Excellent
Greases: Excellent
Transmission fluids: Excellent
Refrigerants: Excellent
RPTFE SEATS
RPTFE is a polymer similar to polyethylene, in which hydrogen atoms have been replaced by fluorine atoms . The chemical formula of the monomer, tetrafluoroethene, is CF2 = CF2. Among them are the PFA (perfluoroalkoxide) resin and the FEP (Flurinated Ethylene Propylene) copolymer, called PFA and FEP respectively. Both PFA and FEP share the characteristic properties of PTFE, offering greater ease of handling in their industrial application.
Mechanical and chemical properties
- Density: 2.18 g / cm3
- Hardness: 51º Shores
- Temperature range: -45ºC + 230ºC
- Tensile strength: 315 Kg / cm2
- Elongation: 68 MPa
- Does not break on impact
- Dielectric resistance: 48 Ohm
- Volumetric resistivity: 10 ^ -18 Ω-cm
Features
- Inert, does not react with other chemicals except in very special situations.
- Toxicity is practically nil
- Minimum coefficient of friction
- Great waterproofness
- Great electrical insulator
- Great flexibility
- UV resistance
- Non-stick
Applications
Water: Excellent
Salt water: Excellent
Oils: Excellent
Mineral oils: Excellent
Acids: Excellent
Food: Excellent
Halogenated hydrocarbons: Excellent
Solvents: Excellent
Greases: Excellent
Transmission fluids: Excellent
Refrigerants: Excellent
VITON SEATS
It is a fluorinated rubber with extraordinary resistance to temperature . It is the best elastomer for high temperature applications, but not in steam, it does not spread the flame and is self-extinguishing. It is the synthetic rubber more resistant to hydrocarbons both aliphatic aromatic and chlorinated.
Mechanical and chemical properties
- Hardness limit: 50 to 90º Shores
- Specific weight: 2.00 grs./cm3
- Temperature range: -30 + 250º C
- Breaking load: 70 Kg / cm2
- Elongation: 220%
Features
- Very good mechanical resistance
- Good resistance to heat and flame
- Good resistance to abrasion and aging
- Excellent resistance to petroleum derivatives
- Excellent resistance to aliphatic and aromatic solvents, chlorines, strong acid detergents, oxidizing acids and dilute acids.
Applications
Water: Excellent
Salt water: Excellent
Oils: Excellent
Bases: Excellent
Ozones: Excellent
Gasoline: Excellent
If you have doubts about what more materials from seats available for our valves do not hesitate to contact us.