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:: OUR PRODUCTS ::

Welcome to S.F. Engineering Works Greese Plants


- Impact Pulveriser
- Micro Pulveriser without Screw Feeder
- Micro Pulveriser with Screw Feeder
- Air Classifying Mill
- Disintegrator
- Jaw Crushers
- Hammer Mills
- Ball Mills
- Jar Mills
- Multi Mills
- Pin Mills
- Oscillating Granulator
- Colloid Mill
- Toothed Colloid Mill
- Milling System
- Disperser
- Sand Mill
- Basket Mill
- Bead Mill
- Horizontal Mills / Super Mills
- Attritor
- Three Roll Mill
- Two Roll Mills
- Stirrer
- High Speed Emulsifier
- Deck Type Shifter
- Gyro Shifter
- Vibro Shifter
- Centrifugal Shifter
- Centrifuge
- Filter Press
- Fluid Bed Dryer
- Tray Dryers
- Drum Dryers / Flaker
- Double Cone Vacuum Dryer
- Flash Dryer
- Spray Dryer
- Sigma Kneader
- Ribbon Blender / Powder Mixer
- Double Cone Blender
- Y Blender
- Shear Plough Mixer
- Twin Shaft / Paste Planetory Mixers
- Drum Mixer
- Edge Runner / Mixer Muller
- Rapid Mixer Granulators
- Fulidized Zone Mixer
- Stirrer
- Gyroshaker
- Variable Speed Disperser
- Powder Mixer
- Shear Plough Mixer
- Sigma Mixer
- Edge Runner
- Planetary Mixer
- Micro Pulverizer
- Powder Mixer
- Stirrers
- Ball Mill
- Edge Runner
- Shear Plough Mixer
- Sigma Mixer
- Attritor
- Three Roll Mills
- Sand Mills
- Variable Speed Disperser
- High Speed Emulsifier
- Stirrers
- Colloid Mill
- High Speed Emulsifier
- Sigma Mixer
- Planetory Mixer
- Ball Mill
- Jar Mill
- Porcelain Jars
- Ointment Plants
- Manufacturing Vessel
- Ball Mill
- Jar Mill
- Sigma Mixer
- Attritor
- Sand Mills
- Variable Speed Disperser
- Slow Speed Stirrer
- High Speed Emulsifier
- Gyroshaker
- Edge Runner
- Conical Blender
- Pug Mixer
- Fluid Bed Dryer
- Tray Dryer
- Coating Pan
- Multi Mill
- Granulator
- Rapid Mixer Cum granulator
- Powder mixer
- Micro Pulverizer
- Vibro Shifter
- Jar Mill
- Colloid Mill
- Double Cone Blender
- 'Y' Blender
- Paste Mixer
- Sigma Kneader
- Ball Mill
- Tray Dryer
- Powder Mixer
- Impact Pulverizer
- Three Roll Mill
- Sand Mill
- Attritor
- Turbo Mill
- Tea Coffee Industry / Micro Pulverizer
- Tea Coffee Industry / Vibro Shifter
- Tea Coffee Industry / Ball Mill
- Tea Coffee Industry / Powder Mixer
- Spices/Masala Grinding Industry / Micro Pulverizer
- Spices/Masala Grinding Industry / Hammer Mill Pulverizer
- Spices/Masala Grinding Industry / Impact Pulverizer
- Spices/Masala Grinding Industry / Pin Mills
- Spices/Masala Grinding Industry / Vibro Shifter
- Spices/Masala Grinding Industry / Powder Mixer
- Mineral Industry / Ball Mills
- Mineral Industry / Impact Pulveriser
- Mineral Industry / Vibro Shifter
- Mineral Industry / Disintegrator
- Mineral Industry / Conveyor
- Mineral Industry / Ribbon Blender
- Mineral Industry / Flash Dryer
- Chemical Processing Plants
 

Plants/ Grease Plant:

Types Of Greases
Lithium, Calcium, Soda, Aluminium, Complex and Mixed soap base Greases, Soap free Grease, PTFE, Silicone and Molybdenum modified Greases, Specialty and Synthetic Greases.

Basic Defination
The original Definition of ASTM of Grease was "A” solid or semi solid combination of petroleum products and a soap or mixtures of soaps with or without fillers, suitable for certain types of lubrication.
Subsequent technological advances have led to the use of synthetic lubricating fluids on the one hand and non-soap thickener’s on the other hand.

Current - Modified Definition of Grease is "A solid or semi solid product of dispersion of thickening agent in liquid lubricant. Other ingredients imparting special properties may be included”.
Most greases are in fact is a combination of petroleum oils and metallic soaps.

 

Grease is a lubricant of higher initial viscosity than oil, consisting originally of a calcium, sodium or lithium soap jelly emulsified with mineral oil.

Greases are typically used in areas where a continuous supply of oil cannot be retained, such as open bearings or gears.

Grease is a fine dispersion of an oil-insoluble thickening agent - usually soap in a fluid lubricant which is generally mineral lubricating oil. The soap is made up of fatty acid, tallow or vegetable oil saponified with alkali which can be hydrated lime, caustic soda, lithium hydroxide or aluminum hydroxide. The lubricating oil component is refined base oil-naphthenic, of medium viscosity index, or cylinder oil stock. Structurally grease is a “water-in-oil” emulsion. Its appearance is smooth, mostly translucent, soft or hard.

Properties essential for performance of grease are structural stability, lubricating quality, low and high temperature performance (which are provided by the selected lube oil base stock), where as properties such as water resistance, high temperature quality, resistance to break down through continuous use and ability of grease to stay in place are provided by the soap.

Additives e.g. Graphite, modified clay, asphalt, oxidation and corrosion inhibitors, extreme pressure additives molybdenum disulphide etc. are used to impart specific properties as required by end application.

Factors to be considered when selecting greases are the type of grease, which in turn depends on operating temperatures, water resistance, oxidation stability etc. The second factor, no less important, are the grease's characteristics, including viscosity and consistency.

 

Basic Types Of Grease

  • SOAP TYPES GREASES

Metallic soaps + Lubricating Oils + Additives for imparting Special properties

  • NON SOAP THICKNER GREASES

Thickening Agent + Lubricating Fluid (Synthetic oils) + Additives for imparting Special properties

The value of plastic lubricants has been recognized since very early times when animal fats were used for Axles and the like. In general any lubricating fluid can be gelled by means of a suitable thickness to form a lubricating Grease. In practice mineral oils are almost exclusively used. For soap type Greases mineral oils of relatively low viscosity index 60 are preferred since the greater solvency of the more aromatic oils for soaps makes manufacture easier and gives greases with lower soap contents and with better properties.

Synthetic Fluids: Esters and silicones are used, only in greases for special applications, where cost is secondary to performance to meet low temperature and high temperature requirements; - 75ºC to + 320ºC.

 

The Soaps used are the metallic salts of long chain fatty acids derived from wide range of natural fatty materials. Soaps are mainly produced by specifying the fat or fatty acid with appropriate alkali in the presence of oil.

In some cases pre-formed soaps are used, such as aluminium stearate, lithium sterate etc.

Non Soap – Thickners may be inorganic e.g. silica or clay or organic with a very high melting point . e.g. terephthalamates, arylureas (these may be either pre-formed or formed in situ) and the dye stuffs, indanthrene and phthalscyanine. They need to be oleophilic and this characteristic may be imparted either in the thickner formulation (i.e. by including a long chain hydrocarbon chain or surface esterification ) or by coating the particle surfaces with organic cations. In the latter case about 75 percent of the particle surface is covered, which gives the desired effect without affecting inter –particle forces too much. Pre-treated clays (i.e. coated and dried) need aids to facilitate dispersion in oil. These dispersion aids are low molecular weight polar organic compounds such as methanol, acetone, diacetone Alcohol and propylene Carbonate.

A satisfactory Grease for a given application is expected to:

  1. Provide adequate lubrication to reduce friction and to prevent harmful wear of bearing components
  2. Protect against corrosion
  3. Act as a seal to prevent entry of dirt and water.
  4. Resist leakage dripping or undesirable throw off from the lubricated surfaces.
  5. Resit objectionable change in structure or consistency with mechanical working (in the bearing) during prolonged services.
  6. Not stiffen excessively to cause undue resistance to motion in cold weather.
  7. Have suitable physical characteristics for the method of application.
  8. Be compatible with elastomer seals and other materials of construction in the lubricated portion of the mechanism.
  9. Tolerate some deqree of contamination, such as moisture, without loss of significant characteristics.

Soap Greases consist of dispersions of soap fibres in oil in concentrations mostly in the range 5 to 22%. By weight sometimes solid block greases contain 50 to 40% of soap.

The thickeners in non-soap greases are usually particulate rather than fibrous in nature and in this case the structure is maintained by 3 dimensional linkages due to very short range inter –particle forces (Vander waal’s forces). These linkages are readily broken and re-formed.

     

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