Category Archives for Maintenance

Centrifugal Compressor and Lube System Troubleshooting Checklist

Symptoms Possible Causes Excessive Vibration 1-4-5-6-8-9-10-11-12-13-14-15-22-23-24-25 Compressor Surges 6-7-16-17 Loss of Discharge Pressure 18-19-20 Low Lube-Oil Pressure 27-29-30-31-32-36-37-38-39-40-41 Excessive Bearing Oil Drain Temperature 2-3-21-28-33-34-35-42-43-44 Units Do Not Stay in Alignment 25-26 Water in Lube-Oil 45-46 Possible Causes Possible Solutions 1. … Continue reading

29. April 2018 by Dan
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Reciprocating Compressor Troubleshooting Checklist

Symptoms Possible Causes Noise Vibration Knocking 7-8-9-10-11-12-14-15-17-18-25 Vibration 3-11-14-18-19-25-32 Pressure Discharge Pressure High 3-25 Discharge Pressure Low 1-3-5-23-24-32 Inter-Cooler Pressure High 2-4-6-27 Inter-Cooler Pressure Low 1-3-5-21-22 Discharge Temperature High 1-3-13-14-17-25-27-30 Temperature Outlet Cooling Water Temperature High 1-3-13-25-27-30 Overheating Valves 1-3-25-31 … Continue reading

29. April 2018 by Dan
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Troubleshooting Guidelines

Step 1 Define the desired performance. Define the deviation from that performance. This is the real problem. Step 2 Analyze the cause of the deviation, based on a combination of practical and technical knowledge. Use all available resources. Do not … Continue reading

29. April 2018 by Dan
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Specification for Reconditioning Rods

Obtaining proper coatings to achieve acceptable rod life depends largely on (1) good communications between user and coating vendor, (2) selection of qualified coating facilities, and (3) adherence to appropriate quality control standards. Potential areas which may lead to unacceptable … Continue reading

29. April 2018 by Dan
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Rod Coating Composition and Compatible Packing

Figure 800-15 summarizes composition of the various types of commonly used coatings plus compatible packing materials.

29. April 2018 by Dan
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Rod Undercoating

In some instances, a metallic undercoat such as nickel or nickel alumide is applied between the base metal and the hardface coating. Metallic undercoats are applied to increase the coating system’s resistance to thermal shock and to improve bond strength. … Continue reading

29. April 2018 by Dan
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Rod Electroplating – Porous and Non-porous Hard Chrome Plating

Electroplating procedures, such as chromium plating, have been widely used for many years. The combination of high hardness, corrosion resistance, and low coefficient of friction have made chrome plating a commonly used reconditioning procedure. Basically, the chrome plating process involves … Continue reading

29. April 2018 by Dan
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Rod Flame Plating – Linde Detonation Gun Process (D-Gun)

Flame plating procedures such as Linde’s Detonation Gun provide a bond which is both mechanical and metallurgical in nature. The Detonation Gun procedure is a process patented by Union Carbide (Linde Division). Coatings are produced by passing measured quantities of … Continue reading

29. April 2018 by Dan
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Rod Flame Spray – The Plasma Spray Process

Plasma spray coatings are produced by passing powdered material through a specially designed gun which ionizes an inert gas to form a plasma. Flame temperatures of 10,000 to 30,000°F are reached. Powder is then injected into the plasma flame. This … Continue reading

29. April 2018 by Dan
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Rod Flame Spray – The Metal Spray Process

Metal spray is the process of applying molten metal to the surface of the rod to form a hard, wear-resistant coating. The coating material is melted in a flame and its minute particles are sprayed at relative low velocities onto … Continue reading

29. April 2018 by Dan
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