(BOP Control Fluid for Jack-Up & Platform Drilling)

Water-based hydraulic control fluids specifically formulated for surface and closed loop/return line Blow Out Preventer (BOP) systems, commonly present on Jack-Up and Platform rigs. Erifon CLS (Closed Loop System) fluids are environmentally acceptable alternatives to traditional oil-based fluids. Erifon CLS fluids are compatible with each other and offer the same outstanding technical performance. Fluids differ only in glycol content, which ensures optimal performance in all geographical regions.


Erifon CLS fluids are industry standard fluids and meet all original equipment manufacturer (OEM) requirements.

Key Benefits

  • Non-sheen, seawater-soluble alternative to oil-based fluids
  • Meets stringent global environmental acceptability requirements
  • Excellent liquid and vapour phase corrosion protection
  • High resistance to microbial contamination
  • Great performance lubrication properties
  • Stable with up to 50% seawater contamination
  • Complies with API 16D
  • Manufactured to NAS 1638/AS 4059 Class 6/6b-f or better cleanliness
  • Free Fluid Monitoring programme ensures lasting service life
Typical Physical PropertiesErifon CLS 25Erifon CLS 40
Operational Temperature Range-10°C to 135°C
(14°F to 275°F)
-25°C to 135°C   
  (-13˚F to 275˚F)
AppearanceClear, Pale StrawClear, Pale Straw
Specific [email protected]°C1.051.07
Pour Point-10°C (14°F)-25°C (-13°F)
Kinematic Viscosity (cSt)
-40°C (-40°F)
20°C (68°F)
40°C (104°F)

Semi Solid


Environmental Information

MacDermid maintains worldwide environmental approvals and can offer Erifon control fluids suitable for use in every Exploration and Production region around the world. The current environmental status of Erifon CLS in your area can be acquired from our environmental specialists.


Erifon CLS should be stored in dry conditions, ideally out of direct sunlight. Normal storage temperature range is 5 to 40°C.

Material Compatibility

Erifon CLS contains performance additives which ensure high levels of compatibility with materials typically used closed loop BOP control systems. Extensive material compatibility tests have been performed with Erifon CLS.

Ferrous metals (cast iron, carbon steel, low & high alloy steels, stainless steels…)Compatible
Non-ferrous metals (copper, brass, bronze and other metals and alloys*)…Compatible with alloys typically used in subsea production control equipment.
Avoid Zn, Cd, Pb and Mg metals. Aluminium should be hard anodised.
Coatings and ceramic materials Avoid porous coatings. Compatible with most ceramic parts. Check ceramic coatings.
Packaging & sealing materials
(elastomers and thermoplastics*)
Compatible with standard NBR, HNBR, FFKM, VMQ/FMVQ, CR, TFE/PTFE, PEEK.
Some FKM & AU/EU/PU may show poor compatibility.
Umbilical hose liner thermoplasticsCompatible with Nylon 11, PE and Polyether ester copolymers.
Absorbent gasket materialsAvoid cork, leather, cotton impregnated materials.
PaintsAvoid painting internal surfaces
Cured epoxy, phenolic and nylon based paints are satisfactory. Avoid less resistant paints as they soften. Wash spillages immediately with water.
Filter elementsPolypropylene and glass fibre filter elements recommended over paper filters.
*As material compatibility varies from compound to compound and supplier to supplier, consult supplier for recommendations or request specific compatibility tests.

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