September 2010 Issue

				

 			
		 

		 

	
		
 
		


			
			
		
 
            			
					
			
	







	



		


		
				
				
				  

    

  

            
    

      

        
  
  
      

      

  

    





	
			
How a City Water Department Prevents Cavitation Damage

	
		

	Set in the foothills of Canada’s Rocky Mountains is the city of Airdrie. Without a water supply, Airdrie purchases its water from neighboring Calgary. Every night, Calgary pumps enough water to fill...	

	
           
        	













  



  

    





	
	
Reverse Osmosis Systems for Clean Water
		
Reverse Osmosis Systems for Clean Water

	
		

	An RO system solved the problem of purifying brackish water.Roy Fallon, chief operator of the wastewater treatment plant in the Village of Tequesta in Palm Beach County, Fla., said that after the...	

	
           
        	













  



  

    





	
	
Peristaltic Pump Facts
		
Peristaltic Pump Facts

	
		

	The peristaltic pump explained—from advancements to maintenanceThe earliest peristaltic pumps have been in existence since the 1930s. Through the years, the designs have been continuously refined...	

	
           
        	













  



  

    





	
	
AC Power (Part Four): Transformers
		
AC Power (Part Four): Transformers

	
		

	Last of four partsLast month, we studied the properties and effects of resistive, inductive and capacitive loads in an AC circuit. This month, we will take self induction a step further and apply it...	

	
           
        	













  














  

    





	
	
Cellular Communications for SCADA Applications
		
Cellular Communications for SCADA Applications

	
		

	Effective and secure cellular communications for remote data acquisitionManagers of water/wastewater facilities need to collect accurate information from remote assets such as pumps, tanks and booster...	

	
           
        	













  



  

    





	
	
Electric Motors: Driving to Higher Efficiency
		
Electric Motors: Driving to Higher Efficiency

	
		

	The freefall in electric motor sales is a direct effect of the worldwide economic downturn, which has severely depressed industrial and commercial productions. Despite the 20 to 30 percent drop in...	

	
           
        	













  



  

    





	
	
Escape to Alcatraz: A Low-Pressure Wastewater Disposal System Solves the Problem 
		
Escape to Alcatraz: A Low-Pressure Wastewater Disposal System Solves the Problem 

	
		

	 A low-pressure wastewater disposal alternative offers a cost-saving installation solution for wastewater and raw sewage disposal.Alcatraz Island is probably best known as the place where an...	

	
           
        	













  



  

    





	
	
Goldmine Investment Expands Production Capabilities
		
Goldmine Investment Expands Production Capabilities

	
		

	During the third quarter of 2009, a new grass roots gold mine opened in the state of Zacatacas, Mexico. GoldCorp's Minera Penasquito mining project soon became the largest open pit mine in Mexico and...	

	
           
        	













  












  

    





	
	
Hydraulic Institute Pump FAQs September 2010
		
Hydraulic Institute Pump FAQs September 2010

	
		

	Centrifugal pumps: do they handle slurries, and what is their maximum allowable working pressure?Q. How do rotodynamic (centrifugal) pumps perform when handling slurries?A. The performance of a...	

	
           
        	













  



  

    





	
	
Non-Metallic Mag Drive Pumps: Great Equipment for Aggressive Fluids
		
Non-Metallic Mag Drive Pumps: Great Equipment for Aggressive Fluids

	
		

	Non-metallic magnetic driven gear pump technology improves equipment life and maintenance costs for metering and transfer applications.Finding an efficient and economically feasible way to transfer...	

	
           
        	













  



  

    





	
	
Predictable Pump Motor Maintenance at a Cranberry Bog
		
Predictable Pump Motor Maintenance at a Cranberry Bog

	
		

	Due to the delicate nature of the cranberry, pump failure is not an option.When a pump or motor fails at Sea Wind Cranberry Farm in Langlois, Ore., farm manager Knute Andersson's business is at stake....	

	
           
        	













  



  

    





	
	
Primer on Polymer Handling
		
Primer on Polymer Handling

	
		

	There are many benefits of using liquid polymers in water-treatment applications as long as the blending equipment is able to accommodate their unique characteristics.IntroductionA major concern at...	

	
           
        	













  



  

    





	
	
Reliable Flange Sealing
		
Reliable Flange Sealing

	
		

	Typical operating environments create unique challenges for plant maintenance personnel when meeting their goals of reliably sealing bolted flange connections.Many factors can prove detrimental to the...	

	
           
        	













  



  

    





	
	
The Balancing Act of DP Flow Meter Selection
		
The Balancing Act of DP Flow Meter Selection

	
		

	Choosing the right differential pressure flow meter for an application can be challenging. This article outlines the considerations and trade-offs in selecting the optimal technology.Selecting the...	

	
           
        	













  



  

    





	
	
Understanding the Basics of Pump Repair
		
Understanding the Basics of Pump Repair

	
		

	Knowing the basics of pump repair can simplify preventive maintenance.Technical manuals with specifications like tolerance and pressures are important tools for troubleshooting hard-to-fix...	

	
           
        	













  



  

    





	
			
Unique Sealing Solution Solves Sulfer Leakage Problem

	
		

	Sulfur leakage, causing housekeeping and environmental issues in a refinery, was stopped with an innovative seal configuration.
No other industry has come under such intense scrutiny as the oil...	

	
           
        	













  



  

    





	
			
Wastewater Treatment Industry: Present Challenges and Future Horizons

	
		

	These days, the importance of a fresh water supply and safely-treated wastewater return to the river cannot be overemphasized. No matter how hard we try, we are still a long way from the most...	

	
           
        	













  



  

    





	
	
What is the Sealing System Energy Footprint for Controlling Process or Barrier Fluid Temperature?
		
What is the Sealing System Energy Footprint for Controlling Process or Barrier Fluid Temperature?

	
		

	This is the second of a four-part Sealing Sense series that provides guidance on best practices to minimize the size of the sealing system energy footprint.The first article discussed the energy...	

	
           
        	













  



  

    





	
	
When Maintenance of a Condensate Pump Becomes an Emergency
		
When Maintenance of a Condensate Pump Becomes an Emergency

	
		

	In this case study, routine maintenance of a condensate pump at a nuclear power plant becomes an emergency situation.When a nuclear power plant pulled its vertical condensate pump for routine...