water glycol hydraulic pump brands

Continental Hydraulics announced that it’s PVX vane pumps are now fire-resistant, as they are approved for water glycol to 2,500 psi. Water glycol fluids have proven to be an excellent fire-resistant hydraulic fluid option. This should open up new markets like food processing, steel manufacturing, automotive assembly or and other industry that typically use the water glycol fluids.

The checkball pump’s ability to operate with a combination of high or low viscosity or lubricity fluids offers remarkable flexibility. Dynex hydraulic pumps operate within a wide range of recommended viscosities from 31.6 to 3,142 SUS (1,5 to 680 cSt). Dynex water glycol pumps are widely used in the offshore oil & gas industry.

Bypass from the pistons is collected in this cavity and returned to the inlet side of the pump. The pump is available with either three or six pistons.

The 1.7Kw type SMW hydraulic pump is specifically designed for water-based fluids. Separation of the lubricating oil and the pumped fluid is achieved by the installation of a cavity between the cylinder block and the case. Bypass from the pistons is collected in this cavity and returned to the inlet side of the pump. The SMW pump incorporates three, four or six axial pistons actuated by a single rotating swash plate.

Rotation is bi-directional and the pump may be mounted horizontally or vertically. Vertical motor pump units are supplied with a bellhousing and coupling. Horizontal units have the option of direct coupling between the pump and motors from 71 to 90 frame size.

A suction filter of 150 microns or better should be used. Finer filtration is desirable for the pump life, but is important that the inlet flowrate to the pump is not restricted and no more than -2 in.Hg is measured in the suction pipework under pumping conditions. Where possible a positive pressure should be maintained in the suction pipework under flowing conditions. When the pump is stationary the suction line should be kept under positive pressure to allow priming.

Important - pumps are delivered from Marshalsea with the case lubricating oil drained. Before the pumps are used, the case should be filled with Castrol Alphasyn PG150 to the level specified on the pump technical data sheet

Glycols are an excellent liquid for use with cooling, heating and protective purposes. They are often mixed with water to provide protection against freezing for example in engine cooling applications, as a heat transfer medium and also for maintaining the existing temperatures of a system. They are used as an ingredient for varnishes, paints, polish, ink, cosmetics polyurethane and polyethylene. Glycol has a relatively low Specific Gravity and viscosity meaning it can be handled with centrifugal pumps.

Glycols are inexpensive due to them being inert and having broad chemical compatibility it allows cheap accessible materials such as cast iron to be used in closed-loop cooling systems. Seawater or brine can be used in cooling applications but means more expensive materials must be used as such liquids are aggressive.

They are used in particular in non-moving hydraulics (e.g. machine tools, presses, etc.) and in vehicles that operate in a confined space (electric forklifts, etc.).

The modular and compact construction with single and multiple pump versions permits a wide range of applications. In multiple pump systems up to 5 metering units can ...

The modular and compact construction with single and multiple pump versions permits a wide range of applications. In multiple pump systems up to 5 metering units can ...

... variable-displacement axial-piston pump, the Oilgear pump PVV line is ready. No matter what pressure and flow demands you face, these pumps rise to the challenge.

A hydraulic pump is the power source in a hydraulic system. It is driven by an engine or an electric motor and pumps oil from the hydraulic oil reservoir ...

... pressure requirements. From the 0.23 l/m SM pump to the 193 l/m XH with pressures up to 690 bar (10,000 psi) for most ranges and even up to 1,040 bar (15,000 psi) for the X pump.

Self-priming up to 6 ft., these pumps have a stainless steel housing sealed with PTFE to resist chemicals such as ammonia and detergents as well as harsh solvents including methyl ethyl ketone (MEK).

Castrol AnvolTM WG 46 is an HF-C type water-glycol fire-resistant hydraulic fluid, containing anti-wear additives and corrosion inhibitors. It provides excellent protection against rust and vapor phase corrosion. In hydraulic pump tests, Anvol WG 46 has shown high levels of anti-wear performance. Its foam resistance, low temperature flow, emulsion stability and storage stability are also excellent.

Anvol WG 46 is for use in hydraulic systems where, in the event of fluid leakage, there is a significant risk of ignition. Examples of applications include furnace doors, die-casting machines, forging machinery and mining equipment. It can be used in vane, gear or piston-type pumps with pressures up to 3000 PSI. As with any water containing fluid, continuous high temperature leads to excessive evaporation. The water content should be checked regularly in service and any corrections made by addition of distilled or de-ionized water. Occasional monitoring of alkalinity is recommended to ensure the correct level of corrosion inhibition. Care should be taken to ensure the hydraulic system is designed for using water glycol-based fluids. Care should also be taken to ensure the compatibility of Anvol WG 46 with paints, seals and metals, and also ensure that the hydraulic pumps and filters used are suitable. A thorough draining and flushing procedure should be followed when converting from other fluids to water glycol-based solutions. Anvol WG 46 is fully compatible with nitrile, neoprene, silicone, nylon, butyl rubber and fluropolymer seal materials. Anvol WG 46 meets the fire resistance requirements of: 7th Luxembourg Report FM Global 6930

The Oilgear line of pumping products is focused on extreme reliability when pumping high water content fluids (HWCF, HWBF) or alternative fluids at high pressure. Below is a partial listing of challenging applications and fluids for which the Oilgear pump product line has proven successful.

Oilgear pumps are some of the most reliable pumps available for classic hydraulic media.  For the sake of brevity, classic hydraulic fluids are not listed here.

Phillips 66® FR Fluid-Glycol is a water-glycol based fire-resistant HYDRAULIC FLUIDS developed for use in industrial hydraulic systems operating in areas subject to fire hazards. It contains sufficient water to snuff out a fire resulting from ignition of a fluid leak. It is suitable for use in hydraulic systems operating at 2,000 to 3,000 psi, and can withstand intermittent pressure spikes up to 5,000 psi.

Industrial fluid power applications have increased worldwide over the years. Hydraulic fluid performance demands have increased in operating pressures, safety and reliability. As operating pressures increase, the risk of fire from ruptured lines also increases. It is necessary to balance management’s regulatory and insurance interests with equipment requirements for effective lubrication, wear and corrosion protection.

Fire-resistant fluids include synthetics such as phosphate esters or ester-mineral blends and water-based formulas such as water-oil emulsions or water-glycols. Water glycol fluids have proven to be an excellent fire-resistant hydraulic fluid option.

The fire-resistance of these fluids depends upon the vaporization of the water and the smothering effect of the steam. The other performance characteristics important to these fluids are viscosity, lubrication quality, operating temperature range, corrosion resistance, system compatibility and fluid maintenance. Excellent fire-resistance coupled with good cost and performance makes water glycol fluids the right choice for many industrial applications.

Water glycol fluids consist of a solution of water, ethylene or diethylene glycol, a high molecular weight polyglycol and an additive package. The water-to-glycol mixture typically contains 38 to 45 percent water. These fluids usually contain red or pink dye to aid in their identification.

With water in the fluids’ formulation, evaporation is ongoing and upper operating temperature limits must be considered. Checks must be made periodically of the water content. The fluids’ typical operating temperatures should be kept below 150°F.

The polyglycol is a water-soluble polymer thickener, which can be formulated to cover a wide range of viscosities. The resulting viscosity-temperature properties are Newtonian and give water glycols good low-temperature cold-start pump wear protection as well as minimizing cavitation.

The additive package imparts corrosion resistance, metal passivation, seal and hose compatibility, oxidation resistance, antimicrobial properties and antiwear properties. With a density of about 1.0, mineral oil contaminants may float on the fluid surface and be skimmed off. Finally, water glycol fluids have better thermal transfer properties over other fire-resistant fluids.

Water glycol fluids usually have an operating range up to 2000 psi at less than 150°F. Their lubricating quality is very good where loads are moderate and where only hydrodynamic lubrication is involved. When the application has high bearing loads and extreme boundary lubrication conditions, higher wear rates should be expected. Typical applications include:

There are some application limitations due to compatibility when using water glycol fluids. Regarding metals, the fluid is corrosive to zinc, cadmium and nonanodized aluminum, and the reaction with these metals causes rapid deterioration of the fluid.

Synthetic rubber seal and gasket compatibility is good, however polyurethane, leather or cork materials should be avoided. Typical paints will soften in the presence of water glycols; therefore painted surfaces should be painted with epoxy resin paints.

Testing should be conducted initially to measure the water glycol fluid’s ability to meet performance specifications. When charged to a system and during use, water glycol should be periodically tested as part of a maintenance condition-monitoring program.

Given that fluid performance results may differ significantly, as shown in Table 2, fluid performance based on standardized (ASTM) tests should have a major influence in product selection. A Midwestern steel plant recently requested five major commercially available water glycol fluids be evaluated for lubrication performance. Table 2 shows that significant variation is possible. The fifth fluid is unqualified for use.

Note the apparent lack of correlation in Table 2 between the vane pump test (combination boundary and hydrodynamic lubrication) and the boundary lubrication measurement of the Four-ball Wear Test. Figure 1 shows the sample specimen for ASTM D2882 vane pump testing on fluids A (left) and E (right). Fluid E clearly shows the excessive metal scuffing and wear.

The most common fluid faults noted in samples tested from water glycol users are particle contamination, contamination with other fluids and water loss or accumulation shifting the viscosity.

Particle and dirt contamination is a problem for water glycols more than mineral oils because of the affinity of the polymers to hold the fine particles in suspension. Good maintenance practices and filter management is required.

Contamination from mineral oils is readily observable by visual appearance (pink milky emulsion sample) or FTIR. Figure 2 shows a used normal fluid and a used contaminated fluid. The milky appearance and the layer of mineral oil on the top of the sample fluid suggest an oil/water emulsion condition. Contamination often occurs due to the widespread use of mineral oils near or on the equipment using the water glycols, or as a result of direct contamination resulting from poor reservoir top-up practices.

Water loss due to evaporation or accumulation due to the intrusion of free water such as cooling water can be measured accurately by Karl Fischer titration or a refractometer. Make-up water must be distilled or deionized (DI), such as from boiler feed water condensate. Water concentrations should be maintained according to guidelines provided by the OEM. This may mean adding either glycol concentrate or DI water to systems during the lifecycle of the product. This is done to retain proper viscosity and fire-resistance properties.

Water glycols must not be mixed with nonwater-based hydraulic fluids and preferably not with other brands of water glycols. Additive packages in various brands may conflict, resulting in loss of fluid performance. The alkalinity reserve additive does deplete by evaporation. The manufacturer can help users manage fluid alkalinity by supplying supplemental additive.

Water glycol fire-resistant hydraulic fluids are a reliable, cost-effective option for hydraulic power. When maintained properly, they give long, predictable life.

Excellent High-Pressure Performance - Shell Water Glycol S3 CX 46 has been tested to provide excellent performance in applications of 350 bar (5000 psi) by providing excellent antiwear for pump parts or motor components.

Fire Resistant - Recognized by FM Global as a less flammable industrial fluid Shell Water Glycol S3 CX 46 reduces fire hazards related to personal safety in storage, handling, and use which could help lower insurance premiums.

All Season Usage - A high viscosity index (VI) and a low pour point provided a wide temperature operating window meaning Shell Water Glycol S3 CX can be used year round.

Water Soluble, Easy Cleanup - Shell Water Glycol S3 CX 46 is 100 percent soluble in water making equipment and shop cleanups easier than with conventional hydraulic fluids.

Readily Biodegradable - Formulated with 35-40% water and specially selected additives, Shell Water Glycol S3 CX 46 is readily biodegradable thus helps minimize disposal problems.

Fire Resistant - A fire-resistant fluid may be used to avoid the risk of fluid ignition in the event of a leak. Fire-resistant fluids are specially formulated lubricants and greases that are more difficult to ignite and do not propagate a flame from an ignition source. Because of its water content, this product has the ability to prevent flame propagation when fire occurs. Recognized by FM Global as a less flammable industrial fluid Shell Water-Glycol S2 C 46 reduces fire hazards related to personal safety in storage, handling, and use which could help lower insurance premiums.

Heat Transfer Properties - Water based fluids such as Shell Water-Glycol S2 C 46 are excellent heat transfer media. Water glycol fluids in general have marked advantages over typical mineral oil based formulations in this respect. One of the most effective protection against fire and explosion is to prevent leakage with proactive servicing, and maintenance and care of the system.

Low Pump Wear - A high level of anti-wear protection is built into Shell Water-Glycol S2 C 46. Shell Water Glycol S2 C 46 is designed to be resistant to mechanical shear resulting in stable viscosity, helping to protect components against wear.

Corrosion Protection - Shell Water-Glycol S2 C 46 will afford corrosion protection to a wide variety of metals including aluminum, copper, brass, cast iron, steel and other metals commonly used in hydraulic circuitry.

Seal, O-Ring and Hose Compatibility - Shell Water-Glycol S2 C 46 can be used in systems that contain a wide variety of seal, gasket and hose materials. Elastomers such as natural rubber, Buna-N, Buna-S and Neoprene are compatible with the fluid. Other materials such as Viton and Teflon are also compatible. The only seal and gasket configurations that are not acceptable are leather, cork, cellulose or other substances that will absorb water and either swell or deteriorate as a result.

Using fire-resistant lubricants is a cost-effective option compared with installing mechanical fire-suppression equipment. With a 42–44% water content, Shell Water-Glycol S2 CX is an HFC type, fire-resistant hydraulic fluid designed for use in industrial equipment operating in areas subject to fire hazards, including in the steel, aluminium, die-casting, mining, glass and tunnel boring industries. It has a higher ignition temperature and lower flammability than mineral oils, and its glycol (diethylene glycol) content enables the fluid to be used in all seasons.

The fluid uses an innovative friction modifier to provide excellent pump lubricity, which can help to extend equipment service life and reduce maintenance costs. In the Vickers V-104 vane pump test, only 10–15 mg of wear was recorded after 100 hours at 2,000 psi and 65°C (ASTM D7043).

Featuring a high level of anti-wear protection, Shell Water-Glycol S2 CX is engineered to offer increased resistance to mechanical shear and has a stable viscosity that helps to protect components against wear.

Provides corrosion protection to a wide variety of metals, including aluminium, copper, brass, cast iron, steel and others commonly used in hydraulic systems.

Water based hydraulic systems have been traditionally used in underground mining applications and in the high temperature areas of steel mills and foundries

Parker"s broad range of energy-efficient hydraulic pumps includes displacement models of variable piston, fixed vane and fixed gear pumps. Designed to handle a wide range of applications, Parker pumps are available with electronic and computer controls and, like all Parker products, these pumps are manufactured with the finest materials under strict quality control.