PEECO Low Flow Switches

PEECO Low Flow Switches
PEECO Low Flow Switches

PEECO Low Flow Switches

PEECO low flow switches are designed to perform under conditions other switches can’t touch.  Our low flow switches can detect flow rates of less than 0.01 GPM reliably and with repeatability.

  • Adjustable paddle from half to full diameter.  Easily changed to accommodate flow/media changes, half-full lines, fluid separation, etc.
  • Extremely sensitive unit designed for minimum actuation.
  • Available in explosion and non-explosion proof models in screwed of wafer tees.   Recommended for line sizes up to 2″ inclusive.
  • These units – designed for extreme sensitivity — allow full flow with minimal pressure drop. Flows of less than 0.01 GPM can be reliably detected.
  • Low flows of gases require a special feature to compensate for chatter created by the compressibility of gas. This is accomplished by introducing a constantly expanding taper on the inlet side, so when the paddle moves the gas expands uniformly.

 

FOLDING PADDLE

Utilizing a helical-wound Inconel spring, this design permits extremely low flow actuation without impeding media passage at high velocities -such as found on flare gas stacks.

 

PEECO Flow Rate and Pressure Drop Information

* Minimum Flow Rate Required For Actuation By H2O & GN²
I = Increasing Flow | D = Decreasing Flow | P = Pressure Drop In PSI
All Flow Switches Were Tested At 100 psi and 300 psi. Standard Units with a 15A -125-250-480 VAC SPDT Micro-Switch. Lower actuation points can be reached using our special folding paddle.


Line Size 1/4 to 3/4 inches

PIPELINE SIZEFLOWGPM (H20)PRESS DROPSCFM (GN2)PRESS DROP
1/4" STDINCREASING1.174 4.72 PSI6.621.54 PSI
DECREASING1.1554.39 PSI4.200.65 PSI
1/4" LOW FLOWINCREASING0.1484.59 PSILESS THAN 0.050.43 PSI
DECREASING0.134.58 PSILESS THAN 0.050.425 PSI
1/4" LOW-LOW FLOWINCREASINGLESS THAN 0.056.39 PSILESS THAN 0.050.425 PSI
DECREASINGLESS THAN 0.058.84 PSILESS THAN 0.050.425 PSI
1/2" STDINCREASING1.940.64 PSI8.90.5 PSI
DECREASING1.660.60 PSI8.00.5 PSI
1/2" LOW FLOWINCREASING0.220.7 PSILESS THAN 0.040.798 PSI
DECREASING0.200.7 PSILESS THAN 0.040.735 PSI
1/2" LOW-LOW FLOWINCREASINGLESS THAN 0.011.15 PSILESS THAN 0.040.798 PSI
DECREASINGLESS THAN 0.011.13 PSILESS THAN 0.040.70 PSI
3/4" STDINCREASING3.140.06 PSI13.90.07 PSI
DECREASING2.420.06 PSI11.420.07 PSI
3/4" LOW FLOWINCREASING0.5990.8 PSI5.370.036 PSI
DECREASING0.5990.8 PSI4.670.036 PSI
3/4" LOW-LOW FLOWINCREASING0.011.22 PSILESS THAN 0.050.036 PSI
DECREASING0.011.22 PSILESS THAN 0.050.036 PSI
PIPELINE SIZEFLOWGPM (H20)PRESS DROPSCFM (GN2)PRESS DROP


Line Size 1 to 2 inches

PIPELINE SIZEFLOWGPM (H20)PRESS DROPSCFM (GN2)PRESS DROP
1" STDINCREASING3.20.06 PSI23.630.07 PSI
DECREASING2.50.06 PSI19.410.07 PSI
1" LOW FLOWINCREASING0.6550.785 PSI9.1290.036 PSI
DECREASING0.640.78 PSI7.9390.036 PSI
1" LOW-LOW FLOWINCREASINGLESS THAN 0.011.15 PSILESS THAN 0.030.03 PSI
DECREASINGLESS THAN 0.011.1 PSILESS THAN 0.030.03 PSI
1-1/2" STDINCREASING3.440.7226.00.07
DECREASING3.400.7223.80.05
1-1/2" LOW FLOWINCREASING0.7561.2LESS THAN 1.00.78
DECREASING0.7551.2LESS THAN 1.00.67
1-1/2" LOW LOW FLOWINCREASING0.3141.7LESS THAN 1.01.1
DECREASING0.3131.7LESS THAN 1.00.93
2" STDINCREASING5.980.7 PSI35.40.07 PSI
DECREASING5.80.68 PSI32.80.07 PSI
2" LOW FLOWINCREASING0.761.2 PSILESS THAN 1.00.70 PSI
DECREASING0.751.2 PSILESS THAN 1.00.61 PSI
2" LOW-LOW FLOWINCREASING0.321.9 PSILESS THAN 1.00.94 PSI
DECREASING0.321.9 PSILESS THAN 1.00.86 PSI
PIPELINE SIZEFLOWGPM (H20)PRESS DROPSCFM (GN2)PRESS DROP


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