Fire Protection System

Vertical Bladder Tanks


The CHEMGUARD bladder tank is a steel pressure vessel which stores a foam concentrate contained within an elastomeric bladder. The concentrate is discharged from the tank by incoming water applying pressure to the bladder. This applied energy is transferred to the concentrate, supplying pressurized concentrate to the proportioner. (Proportioners are separate items described on a separate data sheet.)

CHEMGUARD bladder tanks are available in both vertical and horizontal tank models and a variety of nominal capacities as listed in the tank information tables. Both tank models feature perforated center tubes which allow improved agent discharge.

Features incorporated into the CHEMGUARD bladder tanks include the following:

  • Water pressurized bladder construction, alleviating the requirement for foam pumps or other energy sources
  • Valves that are pinned in the normal operative positions and are supplied with nameplates identifying their functions and operating instructions
  • Bladder tanks are supplied with corrosion-resistant piping
  • Exterior tank surfaces finished in red standard system paint or coated with an epoxy “CR” red finish for use in marine or corrosive environments
  • Tanks with a high build epoxy coated interior for use with both fresh and salt water

The CHEMGUARD bladder tank is one component in a balanced pressure proportioning system. Its operation requires no external power other than a pressurized water system. The bladder tank may be used with any CHEMGUARD foam agent. It can be used in a proportioning system incorporating single or multiple proportioners and any suitable discharge device.

CHEMGUARD bladder tanks have numerous applications including truck loading racks, aircraft hangars, dip tanks, pump rooms, and helipads.


The CHEMGUARD vertical and horizontal tank assemblies are both Underwriters Laboratories (UL) listed with various CHEMGUARD proportioners and foam concentrates, and bear the “UL” label along with an American Society of Mechanical Engineers (ASME) code stamp.

Standard bladder tanks 200 gal (757 L) and larger are CE marked in conformance with the European Pressure Equipment Directive. Tanks less than 200 gal (757 L) are acceptable based on sound engineering practices of ASME code.