Monthly Archives: April 2014

The ratings in this chart are based on the results of laboratory tests. They reflect the relative capabilities of various Teflon, silicone, PVC and rubber hose formulations to withstand specific chemicals. NOTE: The ratings in the chart DO NOT reflect the extent to which extraction may occur or the extent to which fluids may undergo any physical changes in properties or composition as a result of coming into contact with the hose. Saint-Gobain Performance Plastics makes no representation or warranty concerning the susceptibility of any fluid to become contaminated or undergo changes in properties or composition as a result of possible extraction of hose ingredients by the fluid to be transmitted. Certain corrosives that would be destructive to the hose with prolonged exposure can be satisfactorily handled for short periods if flushed with water after use. All ratings are based on room temperature (73°F). Chemical resistance will be adversely affected by elevated temperatures.

Centrifugal pump cavitation can be described as the formation and eventual collapse or implosion of vapor bubbles inside a pump.

A primary cause for cavitation is inadequate net positive suction head available (NPSHa). Poor NPSH leads to lower liquid pressure in the pump and if pressure in the eye of the impeller falls below the vapor pressure of the fluid, then cavitation can begin. When this takes place, the following can occur:

• Pitting on impeller blades.
• Bearing failure.
• Mechanical seal failure.
• Shaft breakage.
• Poor efficiency.

Preventing this type of pump cavitation may require several changes in system design or operations. Increasing pressure at the suction of the pump, decreasing the temperature of the liquid being pumped, and reducing head losses in the pump suction piping can increase the NPSH.

Implosion of vapor bubbles that form within the liquid inside a pump is what causes

Navigate chemical resistance with confidence using our Chemical Resistance Comparison Chart, compiled based on theoretical information gleaned from recognized literature regarding the chemical resistance of individual elastomers. This comprehensive chart serves as a valuable resource for those seeking insights into the compatibility of different materials with various chemicals. To determine the ideal footwear material for your specific application, we invite you to explore further by downloading our Footwear Resistance Chart. This resource empowers you with detailed information, ensuring informed decisions regarding the selection of footwear that meets the specific chemical challenges of your work environment. Stay well-informed and equipped by utilizing our charts to enhance safety and protection in your workplace.

Unlock the key to effective hand protection with our Glove Chemical Resistant Glove Guide, a comprehensive resource that unveils crucial insights into different glove styles when subjected to various chemicals. This invaluable chart is based on rigorous testing, providing essential information to aid in the selection of the most suitable gloves for specific applications. Whether you're dealing with corrosive substances, hazardous chemicals, or challenging work environments, this chart empowers you to make informed decisions about the gloves that offer optimal resistance and protection. To tailor your glove selection to the unique demands of your work, explore our Glove Chemical-Resistant Guide, ensuring that your hands are shielded against potential risks and hazards.

Experience enhanced precision and clarity in cut resistance standards with the introduction of the new ANSI standard, featuring nine distinct cut levels. This progressive update significantly narrows the gaps between each level, offering a more refined and precise categorization for cut-resistant gloves and sleeves, particularly those with the highest gram scores.

The accompanying graph illustrates the discernible difference between the old scale and the new scale, providing a visual representation of the improved granularity in cut level classification. Notably, the new ANSI cut scores will bear an "A" prefix, further distinguishing them from the previous standards. Embrace the heightened accuracy and specificity of the updated ANSI standard, ensuring a more nuanced understanding and selection of cut-resistant gear tailored to your specific safety requirements.

Decibels (db) are a measurement of environmental noise. This chart from the United States Department of Labor showcases a spectrum of sounds and their decibel levels.

When looking into hearing protection devices, you will see the acronym: "NRR." The noise reduction rating (NRR) refers to the amount of sound (dB) reduction a hearing protection device provides when worn properly.

The higher the NRR number, the more hearing protection. For example, a pair of NRR: 30 rated earplugs would provide more auditory protection than a NRR: 27 rated pair of earplugs.

OSHA standards require the use of ear protection for employees that are exposed to noise at or above 85 dB for an 8 hour weighted average.

There is no such thing as a "good" bag or "bad" bag. In cheese packaging, what matters is whether the bag works for your particular application.

Prior to using a particular cheese bag on a regular basis, you should "qualify" the bag for your process. That means running a small number of bags on machinery under standard conditions. Ideally, technical experts from your bag vendor should be present during the trial run.

Examine the package for an adequate, leak-proof seal. Put it through your standard storage and distribution process. Only then can you be confident that this particular bag works with your manufacturing process.

If anything in your process changes, you should re-qualify your packaging material. To keep your cost as low as possible, packaging materials are usually designed with a very small margin of error. Even something as simple as a new sealing bar can be the reason for re-qualifying your packaging material. This gives you the best guarantee