WATP 500V High Head Foam System

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Now you can have the proven reliability of a Williams Around The Pump Foam System, combined with the flexibility of a Class “A” and Class ”B” Proportioner in one convenient, easy to use package. No need to fumble with confusing change over valves, because one valve allows you to select the foam source and set the foam concentrate percentage. This system features the ability to infinitely adjust, or “tweak” the foam concentration for Class “A” (1%) or Class “B” (3%) solutions to a maximum of 500 GPM (1892 Lpm).

Features & Benefits

  • Operates against 33% Pump Inlet Pressure (Example: 150 PSI Discharge Pressure w/50 PSI on Water Pump Inlet)
  • Proportions Class “A” Foam up to 500 GPM at 1%
  • Proportions Class “A” Foam up to 1000 GPM at .5%
  • Proportions Class “B” Foam up to 500 GPM at 3%
  • Positive Shutoff on Metering Valve
  • Balanced Ball Design is easy to operate
  • Requires no maintenance
  • Ergonomic grip handle is easy to use
  • Flush port is built into Metering Valve
  • Simplicity of operation
  • Available as manual actuated or air actuated
Metering Selection Chart for WATP-500 "A" (Flows in GPM)
FOAM METERING VALVE POSITION
% I II III IV V VI
0.25 240 380 500 1000 1500 2000
0.5 120 190 250 500 750 1000
0.75 80 127 167 333 500 667
1 60 95 125 250 375 500
Metering Selection Chart for WATP-500 "B" (Flows in GPM)
FOAM METERING VALVE POSITION
% I II III IV V VI
1 180 285 375 750 1125 1500
2 90 142.5 187.5 375 562.5 750
3 60 95 125 250 375 500
4 45 71.25 93.75 187.5 281.25 375
5 36 57 75 150 225 300
6 30 47.5 62.5 125 187.5 250

Ordering Information

Part Number Description
11679 WATP-500V-A Foam System for single tank Class A foam, air actuated
11680 WATP-500V-B Foam System for single tank Class B foam, air actuated
11681 WATP-500V-A/B Foam System for dual tank Class A and B foams, air actuated
11682 WATP-500V-A Foam System for single tank Class A foam, manual actuated
11683 WATP-500V-B Foam System for single tank Class B foam, manual actuated
11684 WATP-500V-A/B Foam System for dual tank Class A and B foams, manual actuated

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Datasheet