Balanced Pressure Proportioners

 

overview

Balanced Pressure Proportioner is a system that automatically maintains equal pressure between the foam concentrate and the incoming water supply, allowing accurate foam proportioning (typically 1%, 3%, or 6%).

Working Principle

Water enters the system through a pipeline.

A proportioner (venturi device) creates a pressure drop.

A foam concentrate pump or bladder tank supplies foam concentrate.

A pressure regulating valve ensures the foam pressure matches the water pressure.

Foam concentrate is injected into the water stream at a fixed ratio.

Q: What is a Balanced Pressure Proportioner?

A Balanced Pressure Proportioner is a device used in foam fire protection systems to accurately mix foam concentrate with water. It maintains equal pressure between the foam concentrate and water supply to ensure a consistent foam solution ratio.

Q: How does a Balanced Pressure Proportioner work?

It works by:

Using a pressure-regulating valve to balance the pressure of foam concentrate with incoming water pressure
Feeding foam concentrate into the water stream through a proportioning device (venturi/orifice)
Ensuring a constant mixing ratio regardless of flow fluctuations

Q: What are the main components of a BPP system?

Typical components include:

Foam concentrate tank (e.g., bladder tank or atmospheric tank)
Foam pump (if applicable)
Pressure regulating/balancing valve
Ratio controller (proportioner)
Piping and control valves

Q: What foam concentrates can be used?

Balanced Pressure Proportioners can work with:

AFFF (Aqueous Film Forming Foam)
AR-AFFF (Alcohol Resistant AFFF)
Protein and fluoroprotein foams

Q: What are the advantages of using a BPP system?
Accurate proportioning over a wide flow range
Reliable and stable performance
Suitable for large and variable flow systems
Can be used in fixed or mobile fire protection systems