Foam Ratio Controller for Use in Balanced Pressure Systems, Foam Proportioning Equipment Proportioner for Foam Bladder Tank Foam Ratio Mixer

• Customization: Available
• Sprinkler Installation: for Foam Tank
• Sprinkler Head Type: Ratio Controller
• Model NO.: 2.5-8 inch
• Alarm Valve Type: for Foam Tank
• Automatically Opened and Closed Repeatedly: Can Automatically Opened and Closed
• Open Fire Sprinkler System Type: Water Spray System
• Closed Fire Sprinkler System: for Foam Tank
• Dry Alarm Valve Type: for Foam Tank
• Wet Alarm Valve Structure: for Foam Tank
• Alarm Valve Diameter: Customise
• Nozzle Flow Coefficient: Flow Range as Low as 70 Gpm
• Deluge Valve Type: Customise
• Material: Brass and Stainless Steel
• Size: 2.5-8 Inch
• Product Name: Ratio Controller
• Color: Natural Finish
• Packing: Carton or Crate
• Transport Package: Carton or Wooden Box
• Specification: customise
• Trademark: WINAN
• Origin: China Shenzhen
• HS Code: 8479820090
• Production Capacity: 500 Pieces/Month

Product Description

Ratio Controller

Water Pressure Sensing Port For Use In Balanced Pressure Systems

Flow Range As Low As 70 GPM

Brass And Stainless Steel Construction

Adjustment Screw Permits Fine Tuning Of Solution Percentage On Site

 

DESCRIPTION

 

 

Ratio Controller is a wafer style proportioning device, which is designed to inject foam concentrate into the water supply piping. It is compatible with all types of foam fire protection systems, and proportions all types of foam concentrates over their entire flow range without manual adjustments, regardless of pressure.

 

The ratio controller consists of three main components: the water orifice jet at the inlet of the ratio controller; the foam concentrate metering orifice located in the foam concentrate inlet; and the throat or receiver located downstream of the water jet. The principle of operation is based on the use of a modified venturi proportioner commonly called a ratio controller.

As water flows through the water jet, it creates a reduced pressure area between the jet and the receiver. This reduction in pressure creates a pressure differential across the foam concentrate metering orifice, causing the foam concentrate to fl ow into the low-pressure area. The foam concentrate is then drawn out of the low-pressure area and mixed with the water supply as it enters the receiver. As the water fl ow through the ratio controller jet increases, the pressure reduction increases, thereby creating a corresponding higher pressure differential across the foam concentrate metering orifice. This increase in pressure differential results in an increase in the foam concentrate flow, which is proportionate to the water flow through the ratio controller. Proper proportioning is achieved simply by maintaining identical water and foam concentrate pressures at the respective inlets of the ratio controller.

 

Applications

Ratio controllers are commonly used in bladder tank and in-line balanced pressure proportioning systems for aircraft hangars, loading racks, and sprinkler systems, as well as in marine applications, such as shipboard systems, docks, and off shore platforms.