Dwyer P1 - Manual

Piston-Type Flow Switches
Series P1
Unless otherwise specified at time of purchase, units are calibrated in a vertical position, with lead wires up.
Install unit in piping system, using standard pipe fitting procedures. Be sure to keep thread sealing com-
pound out of unit. Make sure that flow is in proper direction - marked "IN" and "OUT" on housing. See
wiring diagrams for electrical connections. CAUTION: See "Switch Ratings" before connecting power.
CAUTION: Flow settings for P1 series switches are normally calibrated using water @ +70°F on
increasing flow. If unit will be used to monitor liquids other than water, gas or air, Factory should have been
consulted at time of purchase for special calibration. All air/gas units are factory-calibrated using a special
piston. Water-calibrated units are not recommended for air/gas applications.
Installation . . .
Wetted Materials
Housing
Piston
Brass Housing
Stainless Steel Housing
Spring
O-Ring
Other Wetted Parts
Pressure Rating
Operating
Proof
Burst
Operating Temperature
Brass or SS Piston
Polysulfone Piston
Repeatability
Set Point Accuracy
Set Point Differential
Switch*
Inlet/Outlet Ports
Electrical Termination
Brass or 316 SS
Polysulfone/Water - Brass/Oil or Air
316 SS
Viton ®
Epoxy
1000 PSIG
2500 PSIG
5000 PSIG
-20°F to +300°F (-29°C to +148.9°C)
-20°F to +225°F (-29°C to 107.2°C)
1% Maximum Deviation
±10%
15% Max.
SPDT, 20 VA
1/4" NPT
No. 18 AWG, 24" L., Polymeric Lead Wires
316 SS
Specifications . . .
* Switch Ratings
Max. Resistive Load
VA
20
Volts
0-30
120
240
Amps DC
.3
.13
.06
Amps AC
.4
.17
.08
A
C
B
Pin Connections for
Units with MS Receptacle
Typical Wiring Diagram