Heavy Duty Balanced Opposed Compressors - Ariel Corporation
Heavy Duty Balanced Opposed Compressors - Ariel Corporation
Heavy Duty Balanced Opposed Compressors - Ariel Corporation
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FOR MODELS: JGZ AND JGU SECTION 4 LUBRICATION<br />
Pour Point<br />
Pour point is the lowest temperature at which the oil will just barely flow. It becomes very important<br />
in cold weather starting applications and in cylinder and packing lubrication with very<br />
cold suction temperatures.<br />
Flash Point<br />
Flash point is the lowest temperature at which the oil will vaporize to create a combustible mixture<br />
in air. If exposed to flame, the mixture will flash into flame and then extinguish itself. This<br />
is important in high temperature applications when the oil may come in contact with air.<br />
Lubricant Base Stock<br />
Liquid lubricants commonly used in compressors include petroleum based oils and synthetic<br />
fluids. All lubricant formulations start with base stock and lubricant additives are used to improve<br />
specific properties such as:<br />
• Increase the viscosity index<br />
• Inhibit oxidation<br />
• Depress the lubricant pour point<br />
• Inhibit rust formation<br />
• Improve detergency<br />
• Provide anti-wear protection<br />
• Provide extreme pressure protection<br />
• Alter the friction characteristics<br />
• Decrease the effects of gas dilution to resist "washing" of the lubricant due to water,<br />
wet or saturated gas, or dilutent properties of the gas stream.<br />
Petroleum-Based Lubricants (also referred to as mineral oils)<br />
Paraffinic Oils<br />
• Solvent refined or hydro-treated<br />
• West Texas Intermediate or Arab Light<br />
• Higher wax content<br />
• Viscosity Index, greater than 90<br />
• Pour point around 25°F (-4°C)<br />
• This is the most common mineral oil base stock.<br />
Napthenic Oils<br />
• Solvent refined or hydro-treated<br />
• South Louisiana crude<br />
• Lower Wax content<br />
• Viscosity Index, less than 80<br />
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