Follow us on Call us for support at 952-935-2345. After hours messages are monitored 24/7.

News & Events

Minimizing Water Hammer with Wafer-Style Axial Flow Check Valves


Minimizing Water Hammer with Wafer-Style Axial Flow Check Valves

In 2015, a wastewater treatment facility began reviewing alternatives to its existing design in an effort to resolve a water hammer issue and considered the use of wafer style axial flow check valves. Axial flow check valves were considered due to the ability to minimize and/or reduce the effects of water hammer based on the difference between an axial flow and dual disc trim. 

To understand the improved performance of an axial flow check valve in minimizing water hammer, you must consider the fundamental difference in the trim design. Just as ball valves, globe valves, gate valves, etc. have different flow characteristics, so do check valves. Check valves can be classified into two basic categories, swing checks and axial flow. In the case of axial flow check valves the trim moves parallel to the axis of the flow path. Only non-slam silent check valves are designed this way. 

A comprehensive case study was put together detailing how the wastewater treatment facility resolved the following hammer problems:

  • Check valve spring failure every 2-3 months
  • Repair and replacement of check valve every 3-4 months
  • Increased routine for tightening loosened flanging due to hydraulic shock in system
  • Retuning of instrumentation due to hydraulic shock in system
  • Loss of capacity due to increased maintenance routine

Download the case study to learn more about DFT Check Valves or contact the team at Campbell-Sevey.

No comments (Add your own)

Add a New Comment


code
 

Comment Guidelines: No HTML is allowed. Off-topic or inappropriate comments will be edited or deleted. Thanks.

Subscribe to our CS Update Newsletter: Send Me The Latest News

952-935-2345  emailmain@campbell-sevey.com  address15350 Minnetonka Blvd., Minnetonka, MN 55345

Products We Carry

GENERATION
  • Hot Water Boilers
  • Watertube Steam Boilers
  • Firetube Steam Boilers
  • Deaerators
  • Heat Recovery Steam Generators (HRSG’s)
  • Automatic Recirculation Valves
  • Economizers
  • Gas-Fired Water Heaters
  • Gas-Fired Humidifiers
  • Boiler/Generator Flue Stacks
  • Continuous Emissions Monitors (CEMS)
DISTRIBUTION
  • Pressure Reducing Valves
  • Safety and Relief Valves
  • Control Valves
  • Pressure Independent Control Valves
  • Expansion Joints, Guides, Anchors
  • Flash Tanks
  • Flow Meters
  • Balancing Valves
  • Check Valves
  • Separators
  • Pumps
  • Pressure Booster Systems
  • Piston Valves
UTILIZATION
  • Heating/Cooling Coils
  • Plate and Frame Heat Exchangers
  • Shell and Tube Exchangers
  • Water Heaters
  • Steam Humidifiers
  • Vacuum Systems
  • Condensers
  • Steam Traps
  • Wireless Steam Trap Monitors
  • Tube Bundles
  • Direct Gas-Fired Space Heaters
  • Direct Gas-Fired Make-Up Air Units
  • Unit Heaters
  • Strainers
  • Air Vents
  • Liquid Drainers
  • Heat Transfer Packages
  • Digital Water Mixing Valves
  • Air Cooled Condensers/Dry Coolers
  • Steam Filters
RETURN
  • Electric Condensate Pumps
  • Steam/Air-Powered Condensate Pumps
  • Packaged Condensate Pump Skids