CASTROL ANVOL CF 22

Description

Castrol Anvol CF 22 is water based hydraulic fluid specifically formulated for use in all elements of floating Drilling and Production unit

Motion Compensation systems, including heave compensators and riser, guide

line and pod line tensioners. Castrol Anvol CF 22 is also suitable for use as the operating fluid in closed loop Blow-out Preventer (BOP) control

systems.

Because of their excellent fire and explosion resistance, water-glycol fluids are the preferred hydraulic medium for motion compensation

systems. To provide the maximum assurance of safety, Castrol Anvol CF 22 also meets strict requirements with respect to compression ignition.

The fluid passes the 50:1 compression ratio requirement as specified in MIL-H-22072.

Castrol Anvol CF22 has viscosity-temperature characteristics which enable it to be used in motion compensation and BOP systems across the

full range of ambient conditions encountered without adverse effect on system response, even when operating at low temperatures.

Because of the risks associated with the location of Motion compensation and BOP systems, the use of lubricants in these systems is subject to

the requirements of the OSPAR Harmonised Mandatory Control Scheme. All components have been tested to meet OSPAR requirements.

Being based upon water and glycol, Castrol Anvol CF 22 disperses in sea water which makes its components available for biodegradation.

Castrol Anvol CF 22 is not miscible with mineral oil and when changing from mineral oil based products to Castrol Anvol CF 22, the system

should be drained thoroughly and all accumulators should be fully discharged to eliminate mineral oil residues. Flushing with potable water

before refilling with Castrol Anvol CF 22 is recommended. More detailed advice on changeover procedures is available upon request.

Application

Motion compensation and Riser Tensioner systems of mobile offshore drilling installations..

Accumulator driven hydraulic systems controlling surface mounted blow-out preventers.

Features and Benefits

Castrol Anvol CF 22 provides the following key benefits:

Tested according to OSPAR requirements.

UK OCNS Group B.

Exceeds US EPA toxicity requirements.*

Passes US EPA static sheen test.

Fire and explosion resistant.

Good viscosity characteristics over a wide temperature range, ensuring consistent response times.

Excellent corrosion protection to BOP components preventing expensive rectification of corrosion damage.

Compatible with all common seal materials (KBR, Viton, Nitrile) allowing simple replacement of mineral oil in hydraulic systems.

* As specified in NPDES permit GMG29000 for subsea production control fluids with reference to M. bahia.

Castrol Anvol CF 22 is biodegradable in the marine environment. The biodegradability of the product ensures the natural degradation of

product should it enter the aquatic enviroment.

Castrol Anvol CF 22 has excellent oxidation stability, good thermal stability and is extremely resistant to hydrolysis. Superior oxidative and

thermal stability extends product life, therefore minimising product consumption and waste.

The physical properties of Castrol Anvol CF 22 and hence system operating characteristics are comparable with those of mineral oil-based

hydraulic fluids. This ensures that existing surface BOP control systems can be readily converted to Castrol Anvol CF 22 with minimal risk and

few, if any, systems changes. Hydraulic systems will operate without noticeable changes in response times or operating characteristics.

Castrol Anvol CF 22 provides a high level of corrosion protection when used in surface BOP control systems, minimising the risk of corrosion

which can be present when dilutable BOP control fluids are used, cause by variations in water quality and variations in fluid concentration

during mixing.

Additional Information

Compatibility with System Components:

Seals, Packing’s etc.

The following elastomeric and plastic materials are fully compatible:

• Nitrile (Buna N)

• Viton

• EPR (Ethylene Propylene)

• Butyl

• Silicone

• PTFE

• Nylon

Polyurethane components are not recommended for use with water-based fluids. Polyurethanes can be subject to hydrolysis. Some grades of

Polyurethane have been developed with improved hydrolytic stability, but it is recommended that compatibility tests are carried out before

using these.

Asbestos, leather, fabric and cork impregnated materials should be avoided in rotary seals since hese materials tend to swell and distort due to

absorption of water.

Paints

Vinyl or epoxy resin based paints are compatible. Most other paint types will be softened or lifted.

Metals

The fluid is compatible with all metals commonly used in the construction of motion compensation equipment, and is inhibited against

corrosion in both the liquid and vapour phases.

Magnesium and its alloys are not compatible with any water-based fluids and the use of zinc and cadmium plating should be avoi.