Contact PEECO Sales Department: 1-201-419-6121 or sales@nciweb.com


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 Standard Units With A 15A -125-250-480 VAC SPDT Micron-Switch. 
See Liquid Flow TableSee Velocity Table
 
Flow Rate and Pressure Drop Information
PIPELINE SIZE GPM H20 P SCFM GN² P
¼ " Standard I 1.174 4.72 6.62 1.54
D 1.155 4.39 4.20 .65
¼ " Low Flow I .148 4.59 Less than .05 .43
D .13 4.58 .425
¼ " Low-Low Flow I Less than .005 6.39 Less than .05 .425
D Less than .005 8.84 Less than .05
.425
½ " Standard I 1.94 .64 8.9 .5
D 1.66 .60 8.0 .5
½ " Low Flow I .22 .7 Less than .04 .75
D .20 .7 .735
½ " Low-Low Flow I Less than .01 1.15 Less than .04 .798
D Less than .01 1.13 Less than .04
.70
¾ " Standard I 3.14 .06 13.9 .07
D 2.42 .06 11.42 .07
¾ " Low Flow I .599 .8 5.37 .036
D .513 .8 4.67 .036
¾ " Low-Low Flow I .01 1.22 Less than .05 .036
D .01 1.22 .036
1" Standard I 3.2 .06 23.63 .07
D 2.5 .06 19.41 .07
1" Low Flow I .655 .785 9.129 .036
D .64 .78 7.939 .036
1" Low-Low Flow I Less than 1.15 Less than .03 .03
D .01 1.1 .03
1-½" Standard I 3.44 .72 26.0 .07
D 3.40 .72 23.8 .05
1-½" Low Flow I .756 1.2 Less than 1.0 .78
D .755 1.2 .67
1-½" Low-Low Flow I .314 1.7 Less than 1.0 1.1
D .313 1.7 Less than 1.0 .93
2" Standard I 5.98 .7 35.4 .07
D 5.8 .68 32.8 .05
2" Low Flow I .76 1.2 Less than 1.0 .70
D .75 1.2 .61
2" Low-Low Flow I .32 1.9 Less than 1.0 .94
D .32 1.9 .86
3" Standard w/ 1-1/8" wide paddle I 8.8 Less than .05 60.0 Less than .05
D 8.2 57.3
3" Special w/ 1-7/8" wide paddle I 7.2 * 20.0
D 6.5 16.8
4" Standard w/ 1-1/8" widepaddle I 21.0 69.0
D 19.5 58.8
4" Special w/ 1-7/8" wide paddle I 11.8 * 20.1
D 10.5 14.5
6" Standard w/ 1-1/8" wide paddle I 36.5 110.0
D 33.0 40.4
6" Special w/ 1-7/8" wide paddle I 25.5 * 69.0
D 20.5 58.9
8" Standard w/ 1-1/8" wide paddle I 45.0 140.0
D 37.5 80.2
8" Special w/ 1-7/8" wide paddle I 35.7 * 95.0
D 27.4 81.4
10" Standard w/ 1-1/8" wide paddle I 59.0 159.8
D 42.5 94.2
10" Special w/ 1-7/8" wide paddle I 49.5 * 120.5
D 35.0 82.0
12" Standard w/ 1-1/8" wide paddle I 79.9 170.5
D 58.0 98.9
12" Special w/ 1-7/8" wide paddle I 71.0 * 140.0
D 49.0 91.0
 
LIQUID FLOW VELOCITY
VELOCITY MODIFICATION REQUIRED
Under 7 FPS Use Standard Unit
7 - 10 FPS Paddle Shroud
Over 10 FPS High Flow Configuration
 
VELOCITY CHART
Specific Gravity Multiplication Factor Specific Gravity Multiplication Factor
.40 1.65 .95 1.03
.45 1.55 1.00 1.00
.50 1.46 1.05 .97
.55 1.39 1.10 .95
.60 1.33 1.15 .92
.65 1.27 1.20 .90
.70 1.22 1.25 .88
.75 1.17 1.30 .86
.80 1.13 1.35 .84
.85 1.10 1.40 .82
.90 1.06 1.45 .80
 
** Horizontal installations on vertical pipe runs will effect activation & deactivation capabilities.
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.