Adjustable Flow Monitor
125 Bypass Series




For monitoring lower flows of corrosive and non-corrosive gases and liquids.
 

Recognized File E75356 
Recognized 73/23/EEC,93/68/EEC
Click here for additional details and specifications

Best for Applications where the Ratio
(Normal Flow/Set Point)
is 10:1 or less.

Vacuum Systems
Wet Stations
Gas Analyzers
Cooling Systems
Industrial Fluid Lines

Features

  • Broad Range of Adjustability
  • Compact Size
  • High Resolution
  • Close On-Off Differential
  • Ease of Customer Setting
  • Monitors Gases or Liquids
  • Materials: 316ss, Brass, Teflon®
  • Confirms: Normal Flow Conditions
  • Senses: High Flow, Low Flow conditions
  • Output: Switch Contact

Operation

When no flow is present the free magnetic piston rests on the bottom of the bore, which is situated in a bypass off the main line. Adjustment of the variable orifice in the main line creates a small bypass flow sufficient to lift the magnetic piston and actuate the reed switch. When flow decreases, the piston moves downward and the reed switch deactuates.

  • Actuation Points for air at 68° F and 14.7 PSIA with increasing flow

  • Deactuation (decreasing flow) averages 10% less than actuation (increasing flow)

  • Repeatability ±2%

  • Unit will pass greater flows

Corrections must be made for other gases, line pressure and temperatures. Please consult your representative or the factory.

Calibration Range

MODEL AIR SCC/M (SCFH) WATER ML/M (GPH)
  MIN MAX MIN MAX
125-BP 100 (0.21) 20,000 (42.4) 3 (0.048) 500 (7.93)
125-BPHF 200 (0.42) 60,000 (127)* 5 (0.079) 950 (15.105)

* AT 60 PSIG (4.137 BARG)

Pressure Loss Table

AIR FLOW RATE CC/M (SCFH) WATER FLOW RATE
ML/M (GPH)
DP TO
ATMOSPHERE
MBARS
(Inches of Water)
100 (0.21) 3.00 (0.048) 1.2 (0.50)
5500 (11.7) 200 (3.17) 9.2 (3.71)
7000 (14.8) 400 (6.34) 11.7 (4.71)
20,000 (42.4) 500 (7.93) 24.7 (9.93)
60,000 (127.1) 950 (15.10) 69.7 (28.00)

Kalrez® and Viton® are registered trademarks of DuPont Dow Elastomers.
Teflon® is a registered trademark of E. I. du Pont de Nemours and Company.

 

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