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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 |