VAG's Variety of Coatings

The right coating for your valve

Besides the standard epoxy coating, VAG offers a number of further types of coatings for valves used in many different fields of application. Here you can find an overview of some coatings, a short description of the most important coatings as well as their areas of application and advantages. The selection of a coating depends on various factors, such as the temperature of the medium conveyed, the pressure acting on the valve, the size of the valve and the specific customer requests.

Should you wish to have a coating that is not listed here, this does not mean that it is not feasible. Please contact us and inform us about your individual wishes. Our experienced engineers and technical designers are looking forward to finding a suitable solution together with you.

VAG coating options

Epoxy

Epoxy powder is the standard coating material for VAG valves. This coating ensures corrosion resistance and high abrasion resistance of buried products. It exhibits excellent bonding with cast iron and outstanding impact resistance. Its surface is free from pores and anti-adhesive. The epoxy coating meets the requirements specified by GSK (Quality Association for Heavy-Duty Corrosion Protection) as well as those of other national and ISO standards. The quality of the coating is monitored systematically by independent test institutes.

Epoxy coating method

  • Application of the epoxy powder by dip coating or fluidised solids technique
  • No solvents used

Resistance

  • Suitable for operating temperatures of up to 70 °C  (Note: This does not apply in general as other parts of the valve may be designed for lower operating temperatures)
  • Suitable for use with inert gases

Areas of application

Drinking water, cooling water, service water, fire water, pre-treated wastewater and natural gas.

Acrylic

The two-component acrylic paint is used for valves exposed to atmospheric influences and UV radiation. It is mainly used for the coating of hydrants. The durable coating also takes account of the aesthetic function of the valve. The coating meets all requirements as regards excellent resistance to UV radiation, mechanical stress and corrosion. The acrylic paint was successfully tested in a corrosive atmosphere and exposed to various simulated atmospheric influences during the test. The coating is available in all RAL colours.

Acrylic coating method

  • Application by airless spraying

Resistance

  • Excellent resistance against corrosion and furring, good abrasion resistance, UV resistance
  • Suitable for operating temperatures of up to 80°C  (Note: This does not apply in general as other parts of the valve may be designed for lower operating temperatures)

Areas of application

Industrial applications involving high air humidity and aggressive atmospheres; can be used for almost all valves.

Rubber lining

The hard-rubber lining is a special coating for use in the chemical industry. It consists of high-tech, premium-quality synthetic or natural rubber. The strong adhesion of the material to cast iron is ensured by vulcanising the rubber to the cast-iron substrate. The finished rubber lining is non-porous and exhibits great hardness as well as excellent chemical resistance.

Rubber lining coating method

  • Vacuum extrusion, vulcanising
  • Five layers with a total coating thickness of 3 mm

Resistance

  • Suitable for operating temperatures of up to 100 °C (Note: This does not apply in general as other parts of the valve may be designed for lower operating temperatures)
  • Suitable for sea water with a high salt content, brackish water, chlorine, hot steam and other chemicals
  • Available with special rubber lining suitable for use with drinking water

Areas of application

Chemical industry, sea water and processing of minerals. This coating is available e.g. as lining for the VAG EKN® Butterfly Valve, the VAG RIKO® Plunger Valve and the VAG SKR Slanted-Seat Tilting-Disk Check Valve.

PATIG

PATIG (VK 2000 / VK 2001) materials are particularly durable and wear-resistant 2-component coatings which meet even the highest demands in terms of strength and chemical resistance. The smooth and non-porous surface reduces the frictional resistance of the media flowing through. The material can be used to prevent wear in new valves and also for maintenance purposes.

PATIG coating method

  • The coating is applied by airless spraying or alternatively by hand with a roller or a brush; it cures at room temperature
  • Recommended coating thickness: 500 μm

Resistance

  • VK 2000 is suitable for operating temperatures of up to 50 °C
  • VK 2001 is suitable for operating temperatures of up to 60 °C
  • Suitable for use with wastewater, river water,  sea water, brackish water and cooling water

Areas of application

Chemical industry, paper industry, power plants, waterworks, cooling systems, cement plants and mining

HALAR® ECTFE

HALAR® ECTFE (ethylene chlorotrifluoroethylene) is a thermoplastic fluoropolymeric synthetic material. On the one hand, it exhibits high thermal resistance (up to 150 °C) and on the other, HALAR® offers excellent and above all reliable corrosion protection. Thanks to its smooth, non-porous surface and its anti-adhesive properties ensured by these features, the coating prevents incrustation of dirt particles. The melting temperature of HALAR® is about 240 °C.

HALAR® coating method

  • Coating at high temperatures
  • Application of a primer required

Resistance

  • Suitable for operating temperatures of up to 150 °C (Note: This does not apply in general as other parts of the valve may be designed for lower operating temperatures).
  • Resistant to almost all chemicals, highly concentrated acids and alkaline solutions, oils, organic acids as well as other aggressive media
  • Highly resistant against mechanical impact

Areas of application

Chemical and pharmaceutical industries, power plants, refineries, food industry, gas industry, power supply and abrasive media.