Parshall flumes provide accurate flow measurement for wastewater and stormwater in open channels, essential for process control and compliance monitoring.

What is a Parshall Flume?

A Parshall flume is a standardized open-channel flow measurement device with a converging inlet, throat, and diverging outlet. Flow rate is determined by measuring water depth at a specific point.

Advantages of Parshall Flumes

• Self-cleansing with minimal debris accumulation
• Accurate flow measurement over wide range
• Low head loss
• Standardized dimensions and ratings
• Works as primary treatment (settling in throat)

Standard Sizes

Parshall flumes range from 1-inch to 10-foot widths. Common sizes for wastewater:

• 1 ft (305 mm): 0.09-3.9 L/s
• 2 ft (610 mm): 0.15-11.9 L/s
• 3 ft (914 mm): 0.18-24.5 L/s
• 6 ft (1829 mm): 0.26-85.5 L/s

Installation Requirements

• Level approach channel (minimum 10x flume width)
• Proper elevation for free discharge or submerged flow
• Level mounting in channel
• Still well for level measurement

Feiran EP Flow Measurement

We supply Parshall flumes and complete flow measurement packages.

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