Bel-Ray Specialty Lubricants: Tech Notes, Vol 4, Issue 3
Bel-Ray Molylube Extreme Pressure High Viscosity Grease Solves a Costly Bearing Problem
A large quarry operation in Trinidad has four facilities that utilize shakers with large double spherical bearings. The company was using LE Almagard 3752 greasein a pneumatic lubrication system. The grease was a lithium complex NLGI 2 grade with a base oil viscosity of 144 cSt @ 40°C and 11.7 cSt@ 100°C. The NLGI 2 grease would not slump into the suction tube of the grease pump and the bearings were not getting greased sufficiently. The bearings were not lasting very long even when they were getting grease due to the low base oil viscosity.
Bel-Ray, working with the Bel-Ray Trinidad distributor, obtained the bearing information, rpms and operating temperature. The bearings had an inside diameter of 140mm and an outside diameter of 300mm. The operating temperature was 70°C and the rpm was 200. Based on this information, Bel-Ray Technical Services calculated the Ndn value, and the minimum base oil viscosity, which was 55 cSt @ operating temperature. To provide the correct base oil viscosity, the Kappa value was calculated which determines the correct base oil viscosity at
operating temperature under the type of load to which the bearing is being exposed. In this application we were looking for a heavy load Kappa value of 4 which is four times the minimum base oil viscosity determined.
Bel-Ray Molylube Extreme Pressure High Viscosity Grease 1000-1 (20256) was selected due to its heavy 1000 cSt @ 40°C base oil viscosity. After determining the viscosity of the base oil at 70°C was 196 cSt the Kappa value was determined to be 196 / 55 = 3.56 very close to the Kappa value of 4.
Bel-Ray Molylube Extreme Pressure High Viscosity Grease 1000-1 was used in the auto lube system and the NLGI 1 grade provided the correct slumping needed. The heavy base oil of the grease provided the lubrication needed by the bearings.
Modern Ammonia Compressor Oil Lowers Operational Costs
Ammonia compressor oils have changed in the past few years due to the inherent drawbacks of using naphthenic mineral oils. Naphthenic mineral oils are used because of their low temperature performance. Traditional naphthenic ammonia compressor oils are a blend of an high viscosity oil and a lower viscosity oil to provide an ISO 68 oil. The high temperatures of the ammonia compressor cause the lower viscosity oils of the blend to volatize and are drawn out of the compressor into the oil separator before the condenser. Over time the low viscosity portion of the ISO 68 oil will be evaporated from the higher viscosity portion and the oil will become higher viscosity—around ISO 100—at which time the oil is changed and the cycle starts over.
Bel-Ray’s New Refrigeration Compressor Oil 68 (62980) is hydrotreated mineral oil that has undergone intense refining that removes most of the unsaturated hydrocarbons and sulfur. The New Refrigeration Compressor Oil 68 will extend the oil change interval and maintain its viscosity. This oil was developed for ammonia refrigeration evaporator temperatures of -36°C. Changing over to the new Refrigeration Compressor Oil 68 is straightforward; drain and flush the compressor then fill with the new oil.
Bel-Ray Synthetic PAO Lubricant 68 (63560) is formulated with PolyAlphaOlefin (PAO) and Alkylated Naphthalene (AN), a combination that has good compatibility with the seals in the refrigeration system. This oil was developed for ammonia refrigeration evaporator temperatures of -50°C. Bel-Ray Synthetic PAO Lubricant 68 will reduce the energy needed to operate the refrigeration system, saving money. It can last up to seven times longer than conventional naphthenic mineral oils, saving additional money. Contact Bel-Ray Technical Services for changeover procedures to get the maximum performance from Bel-Ray Synthetic PAO Lubricant 68.
If there is a requirement for Food Grade H1 lubricant for your ammonia refrigeration system, Bel-Ray has the solution, Bel-Ray No-Tox Syntra Food GradeSynthetic Oil 68 (64236). This food grade H1 lubricant is made from PolyAlphaOlefin (PAO) and a food grade ester. It was developed for ammonia refrigeration evaporator temperatures of -50°C. Bel-Ray No-Tox Syntra Food Grade Synthetic Oil 68 can also last much longer than naphthenic mineral oils, extending component life and saving money. Contact Bel-Ray Technical Services for changeover procedures to get the maximum performance from the Bel-Ray No-Tox Syntra Food Grade Synthetic Oil 68.
Ammonia refrigeration system oil consumption is due to the volatility of the oil with the high temperature of the ammonia leaving the compressor going to the condenser. The volatility of the oil causes the oil to evaporate and get carried over into the oil separator and condenser. The low viscosity naphthenic mineral oil has a high volatility percentage, which explains the high oil consumption of an ammonia refrigeration system using naphthenic mineral oil blends. The high oil consumption can cause wear problems if the oil levels are not maintained. The solution is to use hydrotreated or PAO synthetic oil which has a much lower volatility percentage so the oil does not evaporate as easily and get carried out of the compressor. Using hydrotreated or PAO synthetic oil will reduce the oil consumption of your ammonia refrigeration system, saving you money and extending your equipment life. Current field trial shows less than one gallon of make-up oil in 7,000 hours of the rebuilt compressor and the oil still looks new with no wear metal developing.
Your operation can benefit in many ways by switching from the old naphthenic mineral oils to Bel-Ray Refrigeration Compressor Oil 68 (62980), Bel-Ray Synthetic PAO Lubricant 68 (63560) or Bel-Ray No-Tox Syntra Food Grade Synthetic Oil 68 (64236). These new oils will provide extended drain intervals and better lubrication of components—reducing downtime and extending component life— and will reduce oil consumption, lowering energy usage, all of which will save your operation money.
For more information visit our website at bel-ray.com or contact your local Bel-Ray distributor.
Bel-Ray Silicone Detailer & Protectant Spray
Bel-Ray Silicone Detailer & Protectant Spray is a premium product specially formulated for the powersports and marine industries. It provides an outstanding protective finish to multiple equipment surfaces, including plastic, fiberglass, gelcoat, rubber, metal, chrome and glass. Treated surfaces achieve a factory-finish look and resist the attraction of dust and dirt, making fast work of clean-up and maintenance.
Customers are achieving spectacular results by using Bel-Ray Silicone Detailer & Protectant Spray on their helmets and renewing the original shine. In addition, the product prevents dirt from sticking to the helmet so that when racing in mud you will not experience a build up of dirt and mud on your helmet. It’s also being successfully used on the inside of fenders to prevent dirt from sticking. Bel-Ray Silicone Detailer & Protectant Spray keeps your bike looking like new.
When compared to Maxima® SC1 Silicone Detailer, Motorex® Silicone Spray and Motocross® Silicone Detailer, Bel-Ray Silicone Detailer & Protectant Spray outperforms them all because it:
|•||provides a heavier film|
|•||covers a larger area|
|•||provides a higher sheen|
Formulated with inert chemicals, Bel-Ray Silicone Detailer & Protectant Spray will form a tenacious, protective bond to surfaces yet will not react negatively with paint, metals or plastics. Environmentally inert compounds are safe and will not cause negative effects in the environment. Water-resistant Bel-Ray Silicone Detailer & Protectant Spray stays on equipment where needed and will not wear off with normal use.
Before applying Silicone Detailer & Protectant Spray, make sure the surface is completely dry and free of all dirt, dust, grease and oil to ensure adhesion and maximum shine. Spray Bel-Ray Silicone Detailer & Protectant on the surface and, using a clean, dry cloth, spread the product over the entire surface. The Silicone Detailer & Protectant Spray product can be removed by washing with water and the cleaning products recommended for the vehicle.
For more information log on to our website at bel-ray.com or contact your local Bel-Ray dealer.