PEECO Flow Rate Table

PEECO Flow Rate and Pressure Drop Information

  • * Minimum Flow Rate Required For Actuation By H2O & GN² (based on vertical installation on horizontal pipe runs).
  • I = Increasing Flow | D = Decreasing Flow | P = Pressure Drop In PSI
  • All Flow switches were tested at 100 psi and 300 psi with a 15A -125-250-480 VAC SPDT Micro-Switch.
  • Lower actuation points can be reached using our special folding paddle.
Installing a PEECO Flow Switch
Click for Installation Recommendations

Please Select Your Line Size:


Line Sizes from 1/4 to 3/4 inch. * Minimum Flow Rates Required For Actuation

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 Sizes from 1 to 2 inches. * Minimum Flow Rates Required For Actuation

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


Line Sizes from 3 to 6 inches. * Minimum Flow Rates Required For Actuation

PIPELINE SIZEFLOWGPM (H20)PRESS DROPSCFM (GN2)PRESS DROP
3" (STD PADDLE)INCREASING8.8LESS THAN 0.0560.0LESS THAN 0.05
DECREASING8.2LESS THAN 0.0557.3LESS THAN 0.05
3" (OPT WIDE PADDLE)INCREASING7.2*LESS THAN 0.0520.0LESS THAN 0.05
DECREASING6.5LESS THAN 0.0516.8LESS THAN 0.05
4" (STD PADDLE)INCREASING21.0LESS THAN 0.0569.0LESS THAN 0.05
DECREASING19.5LESS THAN 0.0558.8LESS THAN 0.05
4" (OPT WIDE PADDLE)INCREASING11.8*LESS THAN 0.0520.1LESS THAN 0.05
DECREASING10.5LESS THAN 0.0514.5LESS THAN 0.05
6" (STD PADDLE)INCREASING36.5LESS THAN 0.05110.0LESS THAN 0.05
DECREASING33.0LESS THAN 0.0540.4LESS THAN 0.05
6" (OPT WIDE PADDLE)INCREASING25.5*LESS THAN 0.0569.0LESS THAN 0.05
DECREASING20.5LESS THAN 0.0558.9LESS THAN 0.05
PIPELINE SIZEFLOWGPM (H20)PRESS DROPSCFM (GN2)PRESS DROP


Line Sizes from 8 to 12 inches. * Minimum Flow Rates Required For Actuation

PIPELINE SIZEFLOWGPM (H20)PRESS DROPSCFM (GN2)PRESS DROP
8" (STD PADDLE)INCREASING45.0LESS THAN 0.05140.0LESS THAN 0.05
DECREASING37.5LESS THAN 0.0580.2LESS THAN 0.05
8" (OPT WIDE PADDLE)INCREASING35.7*LESS THAN 0.0595.0LESS THAN 0.05
DECREASING27.4LESS THAN 0.0581.4LESS THAN 0.05
10" (STD PADDLE)INCREASING59.0LESS THAN 0.05159.8LESS THAN 0.05
DECREASING42.5LESS THAN 0.0594.2LESS THAN 0.05
10" (OPT WIDE PADDLE)INCREASING49.5*LESS THAN 0.05120.5LESS THAN 0.05
DECREASING35.0LESS THAN 0.0582.0LESS THAN 0.05
12" (STD PADDLE)INCREASING79.9LESS THAN 0.05170.5LESS THAN 0.05
DECREASING58.0LESS THAN 0.0598.9LESS THAN 0.05
12" (OPT WIDE PADDLE)INCREASING71.0*LESS THAN 0.05140.0LESS THAN 0.05
DECREASING49.0LESS THAN 0.0591.0LESS THAN 0.05
* For Lower Actuation Points Use Special Folding Paddle.


Velocity Recommendations
VELOCITYMODIFICATION REQUIRED
Under 7 FPSUse Standard Unit
7 - 10 FPSPaddle Shroud
Over 10 FPSHigh Flow Configuration
Velocity Correction Factors
SPECIFIC GRAVITYMULTIPLICATION FACTORSPECIFIC GRAVITYMULTIPLICATION FACTOR
.401.65.951.03
.451.551.001.00
.501.461.05.97
.551.391.10.95
.601.331.15.92
.651.271.20.90
.701.221.25.88
.751.171.30.86
.801.131.35.84
.851.101.40.82
.901.061.45.80

Minimum Flow Rate Required For Actuation By H2O & GN² (based on vertical installation on horizontal pipe runs). All minimum actuation points are based on the switch being installed vertically (within 5° of vertical) in a horizontal pipe. Other installations must be called out at time of quotation. Water and nitrogen are used for flow testing to establish minimum activation and deactivation points. Switches will not work properly in turbulent flow and we recommend a minimum of 10 pipe diameters of straight run in front of the switch as well as 5 pipe diameters of straight run after it. All switches must be adjusted after installation unless a 3rd party calibration has been requested and provided.