DESCRIPTION
The Buckeye Full-Range Proportioner is a low-flow rate proportioning device designed to meter the correct amount of foam concentrate into the water stream over a very wide range of flows and pressures. These units are designed to be used in conjunction with a bladder tank for closed-head wet-pipe foam/water sprinkler systems.
NFPA 30 (Flammable and Combustible Liquids Code), Paragraph 4.8.2.8 states that – Foam/water sprinkler systems shall provide foam solution to operating sprinklers with 4 sprinklers flowing. The Buckeye Full-Range Proportioner complies with this requirement.
The principle of operation for the Buckeye Full-Range Proportioner is based upon the use of a specially modified venturi profile. As the water passes through the inlet jet, a metering pressure drop in the annular area is created, which allows foam concentrate into the water stream through the specially designed metering profile. The Buckeye Full-Range Proportioner is ideally suited for closed-head foam/water sprinkler systems where, in the event of a fire, the flow likely starts low but increases as more sprinkler heads open. The ability to proportion at low flow rates is particularly important, since a review of data shows that in many cases, only 4 or 5 sprinkler heads operate during a fire, thus the low-flow proportioning accuracy of the Buckeye Full-Range Proportioner is ideally suited for closed-head foam/water sprinkler systems. In addition, the Buckeye Full-Range Proportioner exhibits a very low friction loss, even at the high end of the flow range.
Primary applications for the Buckeye Full-Range Proportioner are, closed-head foam/water sprinkler
systems protecting warehouses storing flammable and combustible liquids and Group II aircraft hangars.
FEATURES
- U. L. Listed.
- Proportions both standard A.F.F.F. andAR-A.F.F.F. concentrates accurately at low flow rates.
- Proportioner body and inlet nozzle are cast in ASTM C93200 SAE 600, BS100LG2 brass. Machine faced to ANSI B16.5 class 150.
- Installed between two 150 lb. flat-faced pipe flanges. Each face of the proportioner is machined with 32 grooves per inch to ensure a complete seal.
- The proportioner body is clearly marked with a flow direction arrow and a label to identify the type of foam concentrate and percentage ratio.
- Low permanent friction loss – 20 psi (1.36 Bar) at 2,500 Gpm (9,500 Lpm)
- Flanged foam concentrated inlet. Eliminates threads on foam concentrate supply line.
Technical Details
ยี่ห้อ :
BUCKEYE
FLOW RANGE :
The following table lists the nominal flow range for the Full-Range Proportioner. Consult the Buckeye Engineering Department for specific applications using other types of foam concentrates.
BLADDER TANK FLOW RANGES :
Documents and Resources
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