Tag Archives: Flow

From the Learning Center: Valve Selection

ButterflyValveNelson-Jameson has a wide variety of valves to offer our customers. The following list presents some criteria to help identify a suitable valve for a given application or service:

Fluid Service
The type of fluid, whether it is a gas, liquid, slurry, clean, abrasive, etc… determines the type of valves to be chosen. The chemistry of the fluid service determines the material of construction to be chosen for the valve.

Pressure and Temperature Conditions
Operating pressures and temperature conditions will affect the type of valve and material of construction to be chosen.

Line Size
The line size can be a crucial factor in determining the valve type. For very large pipes, compact valves such as butterfly valves may be chosen at times due to smaller size and weight. Availability of a particular type valve for the chosen line size is also an important factor. All types of valves may not be available for the chosen line size.

Throttling (controlling flow) Characteristics
Only some types of valves offer good throttling characteristics (e.g. globe or diaphragm valves).

Pressure Drop
Larger pressure drops increase the pumping cost. Smaller pressure drops increase the valve cost because a larger valve would be needed.

Special Functional Requirements
The actual function for which the valve is required may allow for special criteria in selecting the valve. For example, if the application requires the valve to open quickly, a ball valve would be a good fit.

Please consider these criteria to select the valve that is right for you. For further assistance, please contact our Process Flow Department at 800-826-8302.

To shop our selection of valves available online, click here.

Source: Engineering Design Encyclopedia

About Our Learning Center
To make informed decisions in the food, dairy and beverage industries, you need to have in-depth product knowledge and a variety of educational resources. Our Learning Center is designed to help you with all that. Visit our Learning Center today!

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Tech Tip: Choosing Replacement Parts for C-Series Pumps

Cseries

Do you have an old C-series centrifugal pump and are not sure what size it is for replacement or parts? Just measure the backplate!

• 4″ backplate is a C114.
• 6″ is a C216.
• 8″ is a C218/328.
• 10″ is a 4410.

The frame size and horsepower of the motor will be the other information that you will need if you want a replacement pump quoted.

For more information, call our Technical Sales Department at 800-826-8302.

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Awards Presented to Process Systems & Laboratory Departments

Recently two of our product departments were recognized by vendors in their area.

IMG_6735

From left: Emily Echola, Timon Cooney, Jerry Lippert, Diane Sutton, Jerry R. Henry, and Alan Baierl.

Nelson-Jameson’s Process Systems Department received the 2013 Outstanding Sales and Marketing Achievements Award from Saint-Gobain Performance Plastics for work with their sanitary coupler product line.

Accepting the award (from left to right): Emily Echola, N-J Process Systems Department Manager; Timon Cooney, Saint- Gobain District Sales Manager; Jerry Lippert, N-J President; Diane Sutton, N-J Process Systems Product Manager; Jerry R. Henry, Saint-Gobain National Sales Manager-Process Systems; Alan Baierl, N-J Assistant Process Systems Product Manager.

Also in the Process Systems Department, not pictured: Alan Piller, Al Rasmussen, Bob Oertel, Ed Rhodes, J.R. Banks and Traci Burkart.

Lab Team Photo

From left: Josh Sabo, Mathew Bartkowiak, Ph.D., Jenni Yetter, Steve Zdun, Fritz Buss, Kelly Zirbel, Lori Deiler, and Cathy Laube.

Thermo Scientific Orion awarded Nelson-Jameson’s Laboratory Department with an Outstanding Distribution Partner Award.

The department won the award based on the following criteria:

  • Top 5 Year Over Year Sales Performance as measure by low net ranking for dollar and percentage growth.
  • Participation in Sales and/or Marketing Programs.
  • Active collaboration and partnership throughout the year to drive revenue and improve customer experience.

With the award (from left to right): Josh Sabo, Department Assistant Manager; Mathew Bartkowiak, Ph.D., Department Manager; Jenni Yetter, Product Administrator; Steve Zdun, Service Technician; Fritz Buss, Technical Director; Kelly Zirbel, Product Administrator; Lori Deiler, Buyer; and Cathy Laube, Product Manager.

Congratulations to our product management teams!

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From the Learning Center: All About Sanitary Gaskets

26494Our flexible, non-toxic gasket compounds meet FDA specifications for direct contact with dairy products and edible oils, as well as 3-A, USDA and NSF criteria. They will not absorb taste or odors. Low-swell characteristics make them ideal for exposure to oils, steam and water.

Buna-N: Our most popular gasket material. Also called nitrile or NBR, this oil-resistant rubber compound has excellent compression set, tear and abrasion resistance. Ozone degrades Buna-N, so don’t store gaskets near electric motors and other ozone sources.

EPDM: Good for steam/hot water service. This rubber compound has good resistance to animal and vegetable oils,mild acids, dilute alkalies, silicone oils and greases, phosphates, esters, ketones and alcohols. Not recommended for petroleum oils or diester-based lubricants. Resists water absorption.

Viton: With one of the best fluid resistance characteristics of any commercial elastomer, Viton is particularly resistant to oils, fuels, lubricants and most mineral acids. Viton withstands high temperatures and retains good mechanical properties, oil and chemical resistance. Remains usefully elastic indefinately in air oven testing up to 400°F or, intermittently to 500°F. Excellent for steam service.

Silicone: Outstanding low-temperature flexibility. This rubber compound resists lubrication, animal and vegetable oils, most dilute acids and alkalies. Excellent ozone and weathering resistance. Also resists many solvents that can cause excess swelling.

Teflon: A plastic with an outstanding temperature range. Resists all chemicals except alakali metals, fluorine and some fluorinated chemicals. Because it is not a rubber compound, it will not return to its original shape when compressed. Envelope gaskets of Teflon with a rubber core are available to solve this problem.
Note: Listed by size of tube OD, not by ID/OD of gasket. Call our gasket and O-ring product specialists with questions. Gaskets sold individually, but order in package quantities for more economical pricing.

For more information on gaskets, click here.

About Our Learning Center
To make informed decisions in the food, dairy and beverage industries, you need to have in-depth product knowledge and a variety of educational resources. Our Learning Center is designed to help you with all that. Visit our Learning Center today!

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Tech Tip: Pump Cavitation

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 cavitation. Determining if this abnormal condition is taking place and how to correct will be vital to the longevity of your pump.

Sources: Engineers Edge, Enggcyclopedia

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