Dwyer Series P3 Instruction manual

In-Line Flow Switches

P3 Series

Body

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.

End Fitting

Outlet Inlet

Spring

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

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.

Pressure Drop - Typical

10

8

6

4

16

14

12

2

0

0 1 2 3 4 5 6 7 8

Flow Rate - GPM

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.

Wiring Diagram

Normally Open

Dimensions

11/16” Hex.

1” (25 mm)

3/8” NPT Ports

4”

(102 mm)

1” (25 mm)

11/16” Hex.

O-Ring Typ.

Quick Disconnect Ports

.75” (19 mm)

Across Flats

.43” (11 mm)

Dia. Typ.

4.22”

(107 mm)

MAINTENANCE/REPAIR

Regular maintenance of the total system is recommended to assure sustained optimum performance. These devices are not field repairable and should be returned to the factory if recalibration or other service is required. After first obtaining a Returned

Goods Authorization (RGA) number, send the unit freight prepaid to the following. Please include a clear description of the problem plus any application information available.

Dwyer Instruments, Inc.

Attn: Repair Department

102 Highway 212

Michigan City, IN 46360

Important Points!

Product must be maintained and installed in strict accordance with the National Electrical Code and Dwyer product catalog and instruction bulletin. Failure to observe this warning could result in serious injuries or damages.

For hazardous area applications involving such things as (but not limited to) ignitable mixtures, combustible dust and flammable materials, use an appropriate explosion-proof enclosure or intrinsically safe interface device.

The pressure and temperature limitations shown on the individual catalog pages and drawings for the specified flow switches must not be exceeded. These pressures and temperatures take into consideration possible system surge pressures/temperatures and their frequencies.

Selection of materials for compatibility with the media is critical to the life and operation of Dwyer products. Take care in the proper selection of materials of construction, particularly wetted materials.

Life expectancy of switch contacts varies with applications.

Contact Dwyer if life cycle testing is required.

Ambient temperature changes do affect switch set points, since the specific gravity of a liquid can vary with temperature.

Dwyer Products have been designed to resist shock and vibration; however, shock and vibration should be minimized.

Filter liquid media containing particulate and/or debris to ensure the proper operation of our products.

Electrical entries and mounting points in an enclosed tank may require liquid/vapor sealing.

Dwyer Products must not be field-repaired.

Physical damage sustained by the product may render it unserviceable.

DWYER INSTRUMENTS,INC.

P.O.BOX 373 MICHIGAN CITY, INDIANA 46361, U.S.A.

Phone: 219/879-8000

Fax: 219/872-9057

Lit-By Fax: 888/891-4963 www.dwyer-inst.com

e-mail: [email protected]