Positive displacement pumps: DVD based educational packages by pump people for pump people...
SYNOPSIS:
Volume 2, Fluid Fundamentals & Positive Displacement Pumps
I. Pressure Terminology
Prior to selecting positive displacement pumps for a given application a complete and thorough understanding of basic hydraulic principles must be understood to determine the work required by the pumps to accomplish the task at hand. Without this knowledge most pumps will be doomed from conception.
1. Atmospheric & Absolute Pressure
2. Vapor Pressure
3. Vacuum
4. Cavitation
II. Fluid Flow Fundamentals
How a given pump design handles a viscous shear sensitive fluid will determine (in many cases) whether the pump design is appropriate. Many pumps impart shearing forces which can change the effective viscosity of the fluid. This change may result in fluid degradation, undersized pumps and drives, and simply put... and useless end product.
1. Viscosity
2. Kinematic Viscosity
3. Absolute Viscosity
4. Viscous Behavior Patterns (Newtonian, Thixotropic, Dilatant, Colloidal)
5. Shear & Shear Sensitive Fluids
6. Laminar & Turbulent Flow
III. Positive Displacement Pump Principles
There are many makes and models of positive displacement pumps each having unique design technologies to contribute to a fluid and process application. Understanding basic pump principles and characteristics will help in determining the most viable positive displacement pump for an application.
1. Slip
2. NIPr (Net Inlet Pressure Required)
3. Efficiency & Volumetric Efficiency
4. Horsepower
a. WHP (Water Horsepower)
b. VHP (Viscous Horsepower)
c. BHP (Brake Horsepower)
IV. Smooth & Pulsating Flow
Many positive displacement pumps are reciprocating in nature and impart waves of pressure in forms of dramatic changes fluid velocities between strokes. It is critical these pressure changes be controlled to ensure accurate metering and batching demands and to protect the mechanical integrity of the pump and other process components.
1. Pulsation Dampening
2. Hydraulic Shock Absorption
3. Suction Stabilizing
V. Pump & Process System Protection
The vast majority of positive displacement pumps incorporated into a process will require relief or by-pass systems to protect the pump and process components from over pressurization during an upset condition. An appreciation and purpose of relieving devices will contribute to process and pump success.
1. Relief & By-Pass Valves
a. Internal
b. External
c. Sizing
VI. Special Considerations & Suggestions:
Positive displacement pumps are generally employed on requirements not suitable for centrifugal pumps. Considered by many to be the more complex to apply due to their application involving viscous, shear sensitive, products and to create a vacuum on the suction side to lift fluids, positive displacement pumps usually require an individual to address numerous parameters not required in centrifugal pump selection. Their proper application will be determined by relating to all the parameters, the avoidance of making mere assumptions, and good communication between all the parties involved in the process. In this educational package you will be exposed to "off" design consideration and how to approach the most demanding applications.
1. Low NIPa & High Vapor Pressure Fluid Applications
2. Shear Sensitive Products
3. Handling Abrasives
4. High Flow, Low Pressure Precautions
5. Corrosion, Erosion & Materials Selection
6. Pump Trouble Shooting & Pressure Gauge Installation
7. Variable Viscosity & Pressure Requirements
Order On-Line:
Note: If you are ordering products to be shipped outside of South or North America, you will need to call us at (513) 985-2566 to place your order!
DVD-II, Volume 2 Positive Displacement Pump DVD $99.00 U.S |
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BV-II, Study Guide $33.00 U.S. |
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IMBV-II Instructors Manual $58.00 U.S. |
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PFTB-II Test Set $22.00 U.S |
OR
Fax Order to: 513.583.4810
Please call: (513) 985-2566 for current price, availability, and additional information. Visa and Mastercard are accepted, faxed orders can be sent to (513) 583-4810