Guide: Select the MOLYKOTE® gas contact approved lubricant best suited to your application!

To guarantee optimum lubrication, it is crucial to meticulously prepare the surface of the materials to be lubricated before any application.

With this in mind, Samaro and its partner Socomore recommend the use of Diestone DLS. This is a chlorinated hydrocarbon-free, fast-evaporating cleaning and degreasing agent that provides optimum surface preparation for effective lubrication.

When it comes to lubrication in environments where gas is present, the choice of the right lubricant is crucial to ensuring that equipment runs smoothly and operations are safe. In this guide, we look at the different types of lubricant suitable for contact with gas, the relevant approvals and specific industrial applications.

Which lubricants should be used in the presence of gas?

When choosing a lubricant for an application involving gas, it is essential to opt for products specially designed to withstand the rigorous conditions of these environments. Fluorinated lubricants, particularly those based on PFPE (perfluoropolyether), are often preferred because of their excellent chemical stability, resistance to extreme temperatures and compatibility with various types of gas.

How do you know if a lubricant is suitable for contact with gas?

When assessing the suitability of a lubricant for an application involving gas, several factors need to be taken into account. Firstly, check whether the lubricant is approved for specific use in the presence of gas. Approvals such as DVGW, BAM and Air Liquid ensure that the lubricant meets the required safety and performance standards. In addition, look at the properties of the lubricant, such as its operating temperature range, material compatibility and resistance to environmental conditions, to ensure that it is suitable for your specific application.

Approvals for lubrication in the presence of gas

DVGW approval:

DVGW-approved lubricants are certified for use in gas systems that comply with German standards. MOLYKOTE® G-5511 and MOLYKOTE® 1102 are reliable choices for this approval, offering proven performance under rigorous conditions.

BAM Approval:

BAM approved lubricants are approved for use in environments involving hazardous substances such as flammable gases or aggressive chemicals.

Air Liquid approved:

Lubricants that comply with Air Liquid standards are designed to offer reliable performance and maximum safety in environments containing gas.

Applications in various industrial sectors

Lubricants suitable for contact with gas are used in a variety of industrial applications, including aerospace, automotive (particularly in hydrogen-powered vehicles), military, medical, extreme sports (such as diving) and marine (particularly in submarines).

Benefits and applications of DVGW approved Molykote® lubricants:

DuPont and its Molykote® brand of industrial lubricants have developed to offer extremely pure mineral oils and advanced synthetic oils.

Key features of Molykote® lubricants:

• Wide operating temperature range,
• Ability to withstand high loads,
• Use of extremely pure mineral or synthetic oils,
• Numerous approvals (FDA, NSF, DVGW Gas, etc.).

Samaro recommends the following Molykote® products:

• MOLYKOTE® HP 300: PFPE grease suitable for medium speeds and heavy loads, high food performance; excellent resistance to chemicals and solvents, compatibility with plastics and elastomers / NLGI 2.
  Temperature range from -65 to +250°C.
  NSF H1 approved.
• MOLYKOTE® G-5511: Dimethyl silicone grease. Certified by several certification bodies for drinking water, excellent water resistance.
  Temperature range from -40 to +200°C.
  Approvals : ACS, FDA, NSF 51, NSF 61, DVGW Gas.
• MOLYKOTE® 1102: Highly water-resistant grease for gas contacts. No dripping point. Mineral base / bentone thickened / solid lubricants / NLGI 3.
  Temperature range 0 to +160°C, with peaks up to +220°C.
  DVGW Gas approved.

These Molykote® lubricants are used for :

• MOLYKOTE® HP 300: Hydrogen applications (high-pressure tank connectors).
• MOLYKOTE® G-5511: Compatible with ceramic discs, rubber seals / orings and plastic components. For lubrication of plastic parts / Actuators / Lubrication of ceramic discs for water/gas valves and cartridges.
• MOLYKOTE® 1102: Used for the lubrication of gas taps and valves incorporating metal / glass / plastic combinations. Gas shut-off valves, main and auxiliary pipes for household appliances, boilers or similar equipment.

Choosing the right lubricant for a gas application is essential to ensure reliable equipment and safe industrial operations.

By taking into account relevant approvals, lubricant properties and specific application requirements, you can ensure effective lubrication and optimum performance in gas environments.