© 2022 Pierce Manufacturing Inc. All Rights Reserved. Husky 3 Foam System / 2-1
SECTION 2 GENERAL
2-1. Husky 3 Specifications
2-1.1 Foam Proportioner
The foam proportioning system is an on demand, automatic proportioning, single point, direct injection system
suitable for all types of Class A & Class B foam concentrates, including the high viscosity (6000 cps), alcohol
resistant Class B foams. The operation of the system is based on direct measurement of water flow, and remains
consistent within the specified flows and pressures. The system automatically proportions foam solution at rates
from 0.1% to 3% (0.1% to 1.0% in 0.1% increments and a 3% setting) regardless of variations in water pressure and
flow, up to the maximum rated capacity of the foam concentrate pump.
The design of the system allows operation from draft, hydrant, or relay operation. This provides a versatile system
to meet the demands at a fire scene.
2-1.2 System Capacity
The system has the ability to deliver the following (minimum) foam solution flow rates at accuracies that meet or
exceed NFPA requirements at a pump rating of 150 PSI.
Table 2-1: Maximum Foam Solution Flow
The Class A foam setting is in .1% increments from .1% to 1%. Typical settings are .3% and .5%. *The maximum
capacity is limited to the plumbing and water pump capacities.
2-1.3 Discharges
The number of discharges capable of dispensing foam varies from truck to truck, depending on customer
specifications. Foam discharges can be identified by red/white tags; water only discharges can be identified by
silver/black tags.
2-1.4 System Electrical Load
The electrical load for the foam proportioning system is 65 amps at 3 GPM at 150 PSI.
Concentration Percentage Capacity
3% 100 GPM
1% 300 GPM
.5% 600 GPM*
.3% 1,000 GPM*
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