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Dwyer P3 User Manual

In-line flow switches p3 series

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In-Line Flow Switches

P3 Series

Installation
All NPT threads should be installed using a suitable
thread sealant (Teflon tape or Permatex “No more
Leaks”). Sealant must be kept out of unit during
installation. Ten diameters of straight run piping are
recommended upstream and downstream of the flow
sensor.

P3 Flow Switches Can be Mounted In
Various Positions
Flow settings are based on a vertical
position (inlet port down), using water at
+70°F on increasing flow. Some variation
in set point actuation will occur in other
mounting orientations.

Wiring Diagram

Normally Open

Switch Ratings

Contact rating: 10W
Switching Voltage (DC or AC Peak): 200 Max.
Switching Current (DC or AC): 0.4 A Max.
Carry Current (DC or AC): 0.4 A Max.
Break down Voltage: 230 VDC Min.

0 1 2 3 4 5 6 7 8

16

14

12

10

8

6

4

2

0

PSI Drop

Pressure Drop - Typical

Flow Rate - GPM

Specifications

Wetted Materials

Housing, End Fitting

Piston

Spring

O-Ring

Oper. Pressure, Max.

Operating Temperature

Required Filtration

Set Point Accuracy

Set Point Differential

Switch, See “Switch Ratings”

Inlet / Outlet

Electrical Termination

Hydrolytically Stable Glass Reinforced Polypropylene

PPS Composite

316 Stainless Steel

Fluorocarbon

200 PSI at 70°F, 100 PSI at 212°F

-20°F to +212°F (100°C)

100 Micron or Better

±20%, Maximum

20% Maximum

SPST, 10 VA

3/8” NPT Male or Quick Connect

No. 24 AWG, 24” to 26” Polymeric Leads

Inlet

Body

Spring

End Fitting

Outlet