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Steam Turbine High Pressure Fluid System Upgrade Products


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 General Statements
general-statement-imgBio-Syn EHC FLUID was developed as a premium fire resistant hydraulic fluid, Bio-Syn EHC FLUID provides greater lubrication in vane and piston pumps, elastomer compatibility, and enhanced safety for operating personnel from a fire and toxilogical point of view
Personal Safety Bio-Syn EHC Fluid
personal_safety-imgBio-Syn EHCFluid cannot create phosphoric acid nor does it create any type of aggressive acid.  The typical total acid number of Bio-Syn EHC Fluid is less than 1 and represents a safe organic type of fatty acid, which will not burn the skin.

Unlike phosphate esters, which can contain residual phenols, Bio-Syn EHC Fluid contains no known potential toxicological threat, nor can it manifest any through hydrolysis, making it more toxicologically acceptable from an OSHA, NIOSH, and EPA standpoint.

With Bio-Syn EHC Fluid, it is not necessary to utilize expensive seals, hoses, or accumulator bladders such as Viton or Teflon, as is the case with phosphate esters. Bio-Syn EHC Fluid does not have any tendency to either swell or delaminate more conventional elastomers, such as high nitrile or Buna N; but will, maximize the long term integrity of existing Viton and Teflon seals and hoses.
viscosity-imageBIO-SYN EHC FLUID has a minimum viscosity index of 215 which allows for maximum stability of the viscosity over an extreme range of temperatures, with a minimum pour point down to 0° F.

BIO-SYN EHC FLUID has provided superior lubrication and extended oxidation stability in the severest of high temperature hydraulic operations; including electro hydraulic control systems producted for G.E. and Westinghouse steam turbines.ASTM D2882 hydraulic pump testing registed less than 4 mg total cam ring and vane weight loss.

Pump Test Results BIO-SYN EHC FLUID
Pump Type
Conditions Cam Ring Vanes Total Specifications
Vickers 20VQ 2000 psi
150° F, 100 hr.
0.0 0.0 0.0 50 mg max
weight loss
Vickers 20VQ 3000 ps
175° F, 100 hr.
1.0 0.0 1.0 50 mg max
Vickers 35VQ 3000 psi
200° F, 50 hr.
Run 1 8.0 0.0 8.0 50
Run 2 5.0 3.0 8.0 50
Run 3 8.0 3.0 11.0 50
Run 4 10.0 0.0 10.0 50
Vickers V-104C
(ASTM D2882)
2000 psi
150° F, 100 hr.
3.1 0.8 3.9 50
Rexroth 1100 hr endurance test
(2600 rpm, 85° C, 380 bar)
Denison P-46 (100 hr, 5000 psi, 2400 rpm)
(inspect piston shoes, swash plate, port plate)
no visible signs of wear
Four Ball Wear (ASTM D-2266)
(1,800 rpm, 1 hour, 167° F, 40 kg load)
0.32 mm
Four Square Gear Test (FZG)
(194° F., 1760 rpm, 1600 ml sample, 12 stages)
pass, all 12 stages
Fire Resistance
is inherently fire resistant and is approved under the latest Spray Flammability Parameter protocol with Factory Mutual Global, initially granted a Group I designation. Bio-Syn EHC Fluid will not propagate a flame but will self-extinguish once the source of ignition has been removed. Although all fire resistant fluids will burn under certain conditions, the by-products of combustion can be just as critical as the fire itself. Unlike phosphate esters, Bio-Syn EHC Fluid will not generate a black, acrid, highly noxious smoke, thus providing a potentially safer atmosphere in which to contain combustion.


has been proven to be compatible with phosphate ester fluid in good condition; it is strongly recommended that systems designated for conversion be drained as much as possible, and if necessary flushed, in order to derive the maximum benefits from the fluid change out.

Bio-Syn EHC FLUID does not create phosphoric acid nor does it create any type of aggressive acid.  The typical total acid number of Bio-Syn EHC FLUID is less than 1 and represents a safe organic type of fatty acid, which is not harmful to the skin, as can be the case with phosphate ester fluid.

New Fluid Cleanliness
cleen-imgBio-Syn EHC FLUID is triple filtered through 3 micron beta 200 filters in order to minimize any – contamination of the hydraulic fluid system. This filtration allows us to  achieve greater than servo-system standards thus allowing us to reach a cleanliness standard of ISO 14/11/9, or better. This is significantly cleaner than any other EHC fluid currently being supplied for electro hydraulic control operations.
resistivity-imgIn order to avoid causing damage to servo valves due to static discharge (Free Stream Electron Damage), it is critical to maintain the electrical resistivity of the hydraulic fluid greater than 5 G-ohms-cm. New Bio-Syn EHC Fluid has resistivity values greater than 55 G-ohm-cm and can easily me maintained greater than 100 G-ohm-cm in normal operation.
Physical Properties
– Typical Physical Properties
Appearance Translucent amber fluid
Specific Gravity 0.92
Viscosity Index, DIN 51564 > 215
ISO Viscosity Grade 42
Viscosity, SUS @ 100° F 200 SUS
Stable Pour Point, D97 < 0° F
Total Acid Number < 1
Flash Point, C.O.C., D92 > 550° F
Fire Point, C.O.C., D92 > 650° F
Pump Wear, D2882 < 4mg total wear
Corrosion Test, D665A Pass
Copper Strip, D130 1a
Resistivity 55 G-ohn-cm
Non-Toxic, OECD 203 Pass
      Elastomer Compatibility:  Static seals      Dynamic seals
High Nitrile Rubber (Buna N) Compatible Compatible
Fluro-elastomer (Viton) Compatible Compatible
Polyurethane Compatible Compatible
Teflon Compatible Compatible
Silicone Compatible Compatible


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