March 3, 2004
Subscribers: 34,513
    Today's Tip

  1. Preparation for Equipment Storage

    Book Bits

  2. Filter Bypass Valves and Low Temps

    Lube-Trivia

  3. Where to Sample Hydraulic Fluids

    Q & A

  4. Consequences of Using the Wrong Oil

Today's Tip: Preparation for Equipment Storage

For long term storage of sealed case type equipment like gearboxes, I suggest the following: after following all recommended standard lube practices, bring your inert gas tank (helium or argon) along-side and purge the interior before putting in the final plug. This will drive out remaining moisture in the air with associated contaminants and significantly increase corrosion resistance over time. (Submitted by Porter Claytor, Maintenance Consultant, CNS Associates, LLC. Thanks Porter!)

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Book Bits: Filter Bypass Valves and Low Temps

From "Fluid Contamination Control"

Bypass leakage or flow through an alternate flow path can occur in a number of ways. One of the most obvious leakage paths is through the filter bypass valve, which is included in many housings to protect the element from excessive pressure drops. Whenever flow can occur through a bypass valve, there is reason for concern: is the flow either permanent or excessive? When this flow becomes greater than the amount of flow passing through the filter, as can happen in cold weather, a serious situation exists. We want 100 percent flow through the filter at all times, but when temperature is low, little if any flow passes through the media – the fluid takes the path of least resistance and goes through the bypass valve or through ruptured sections in the element.

More information about the book "Fluid Contamination Control"


Lube-Trivia: Where to Sample Hydraulic Fluids


Test your knowledge and prepare for ICML lubrication and oil analysis certification.

QUESTION: Why is it desirable to sample hydraulic fluids at elbows?

Get the answer here.
Q & A: Consequences of Using the Wrong Oil

"What are the consequences of using an oil with antiwear additives (ZDDP) in a steam turbine where it is recommended to use turbine oil?"

1. The polar nature of the ZDDP will affect the air release, foaming and demulsibility characteristics of the oil. In other words, it is more likely to foam and retain air and water in suspension. This increases the risk of a wipe.

2. ZDDP hydrolyzes into hydrogen sulfide and sulfuric acid. Because water is always a risk in steam turbines, this is a concern.

3. While much less so than EP oil, ZDDP-based AW oil can corrode babbited surfaces.

4. ZDDP might interfere with rust and corrosion inhibition.

Drew Troyer, Noria Corporation

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Resources

 


MARCH 2004

Contamination Control
9-11 Chester, Cheshire, United Kingdom

Lubrication Excellence 2004
23-25 Nashville, Tennessee

Machinery Lubrication I
1-2 New Orleans, Louisiana
1-2 Chester, Cheshire, United Kingdom

Machinery Lubrication II
3-4 New Orleans, Louisiana
3-4 Chester, Cheshire, United Kingdom

Oil Analysis I
8-9 Bilbao, Spain
29-30 Sunninghill, Johannesburg, South Africa

Oil Analysis II
10-11 Bilbao, Spain
31- April 1 Sunninghill, Johannesburg, South Africa

Oil Analysis – The Complete Course
10-12 Bangkok, Thailand

APRIL 2004

Best Practices for Machinery Lubrication
5-7 Sunninghill, Johannesburg, South Africa
14-16 Daegu, South Korea

Machinery Lubrication I
14-15 Santiago, Chile
19-20 Miami, Florida
20-22 Gaborone, Botswana

Machinery Lubrication II
21-22 Miami, Florida

Oil Analysis I
5-6 Gaborone, Botswana
26-27 Tucumán, Argentina
27-29 Mexico City, Mexico
28-30 Sao Paulo, Brazil

Oil Analysis II
28-29 Tucumán, Argentina

Técnicas de Lubricación
30 Mexico City, Mexico

Entire training calendar | Course links

 

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The presence of advertising in Lube-Tips does not constitute an endorsement of the products or services in such ads. Further, because results will vary widely based on a number of factors, Noria Corporation cannot warrant the results, the accuracy or the completeness of any material published herein.

© 1998-2004 Noria Corporation

 
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