NSF Product and Service Listings

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Commercial Warewashing Equipment

Racks per Hour / Dishes per Hour / Water Consumption Calculations

For informational purposes, the estimated racks per hour or dishes per hour for NSF/ANSI 3 Certified dishwashers can be calculated as follows:

Racks per Hour for Stationary Rack Dishwashers = 3600(NR) / TC

Racks per Hour for Rack Conveyor Dishwashers = (CS)(60) / RL

Dishes per Hour for Rackless Conveyor Dishwashers = (120)(CS)(CW) / PD

Water Consumption (gallons per hour) for Stationary Rack Dishwashers = (GPC)(RPH)

Water Consumption (gallons per hour) for Conveyor Dishwashers = (GPM)(60)

Where: CS = Conveyor speed measured in feet per minute
              CW = Conveyor width measured in inches
              GPC = Gallons per cycle
              GPM = Gallons per minute
              NR = Number of racks the dishwasher is designed to hold per cycle
              PD = Distance between pegs measured in inches, center to center of the peg, in the direction of conveyor travel
              RL = Length of the rack measured in feet
              RPH = Racks per hour
              TC = Total cycle time measured in seconds

The total cycle time includes wash, rinse, dwell, and load times. Load times will vary depending on the type of dishwasher. Estimated load times commonly used for specific types of dishwashers are as follows:
door type (straight thru) - 5 seconds
door type (corner) - 7 seconds
hood type - 8 seconds
front opening type - 30 seconds

P.O. Box 301
Jordan Station, ON L0R 1S0 

Facility : Jordan Station, Ontario, Canada

  VC 4
  VC 6
[1] With suffix CW or CCW.

      Final Rinse    
      (20 psi) Operating Time  
  Model Rack Size Flow Usage (seconds) Footnotes
  Number Width gpm gph Wash Rinse Dwell  

Single Tank, Chemical Sanitizing Undercounter Dishmachines
  VC 18-1 16x16  2.0   60   50   23   17   [1] [2] [3]
  VC 18-2 16x16  2.0   60   50   23   17   [1] [2] [3]
  VC41LT 20x20     35.7   80   23   37   
  VC51HT 20x20  N/A   36.6   90   25   27   
  VC51LT 20x20  0.5   32   90   25   27   [4]
  VC71HT 20x20  N/A   28.2   70   15   5   
[1] Units are also approved for use as glasswashers.
[2] Recirculated pumped rinse minimum 50 ppm available chlorine.
[3] Water demand is 2.0 gallons per cycle.
[4] With or without suffix (LC) indicating extended wash time: 140 seconds, 27 gph usage.

NOTE: All machines Listed leg mounted or on pedestal base.

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