Dwyer P5 User Manual

Dimensions . . .

Shuttle-Type Flow Switches

P5 Series

Specifications . . .

Materials

Housing, Shuttle, Bonnet
O-Ring
Other Wetted Parts

Operating Pressure, Max.

Operating Temperature, Max.
Set Point Accuracy
Set Point Differential

*

Switch
Inlet/Outlet Ports
Mounting Attitude
Electric Termination

PVC
Buna N
Epoxy

120 PSIG @ +70°F to +100°F (+21°C to +37.8°C)
50 PSIG @ +101°F to 120°F (+38.3°C to +48.9°C)
+120°F (+48.9°C)
±20%
20% Maximum
SPST, 20 VA, N.O. @ No Flow
1/2" NPT, 3/4" IPS, or 1" IPS
Vertical, Inlet Down
No. 22 AWG, 24" L., PVC Lead Wires

Standard Models . . .

PVC

Mat'l.

Clear

Port
Size

1/2" NPT*

3/4" IPS

1" IPS

* 3/4" IPS Model with 1/2" NPT port adapter installed

Actuation on

Incr. Flow

0.5 GPM ±20%

0.5 GPM ±20%

2.0 GPM ±20%

Model

P5-1
P5-2
P5-3

Notes

1. Care should be taken by specifiers
to ensure fluid compatibility with
the wetted materials listed.

2. Use of 150 micron filtration is
recommended

Typical Wiring Diagram . . .

*Switch Ratings

Max. Resistive Load

VA Volts

0-30

20

120
240

Amps AC

.4

.17
.08

Amps DC

.3

.13
.06

Maintenance ...

Removal of Bonnet From Housing ...

Disassembling for Cleaning ...

It is not necessary to remove the unit from the piping system.

CAUTION: Make sure the system is turned off and that no
residual pressure remains in the piping.

1. Carefully slide out the two retaining keys, using a screw
driver or similar tool.

2. Insert wide-bladed screwdriver in one of bonnet removal
slots and twist screwdriver slowly, forcing bonnet out of
housing. Do not pull on lead wires, as this can damage
unit.

Cleaning ...

Clean shuttle, stem and inside of housing by lightly scraping and/or
wiping. Be careful not to damage guide finders in bottom of housing
or flutes inside of shuttle. Check O-Ring, bonnet assembly and
shuttle, and replace if necessary See “Replacement Parts”
(below).Note: Replacement of O-Ring is recommended whenever
unit is disassembled.

To Reassemble Unit...

1. Assemble shuttle on bonnet stem, making sure large,
round end of shuttle is downward,

2. Hold shuttle on stem and insert bonnet squarely into
housing. Gently press bonnet into place.

3 Slide two retaining keys into slots in housing.

Bonnet

Removal Slot

O-Ring

Shuttle

Bonnet

Twist

Screwdriver

Bonnet

Assembly

Stem

Large Diameter
Must be Down­ward

Retaining

Key

Piping

System

Housing

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

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.

Important Points!

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: [phone] www.dwyer-inst.com
Fax: [phone] e-mail: [e-mail]
Lit-By Fax: [phone]