Dwyer 1800 User Manual [en, es]

3-39/64

[91.68]

Ø7/8 [22.23]

CONDUIT

CONNECTION

3-1/8

[79.38]

Ø4

[101.60]

1-27/32

[46.83]

1-1/8

[28.57]

1/8 FEMALE NPT
HIGH PRESSURE

CONNECTION

1/2 MALE NPT

MOUNTING SPUD

1/8 FEMALE NPT
LOW PRESSURE

CONNECTION

3-27/32

[97.63]

2-3/32

[53.18]

2-1/8

[53.98]

CLEARANCE FOR

COVER REMOVAL

3/4

[19.05]

Series

1800

Low Differential Pressure Switches
for General Industrial Service

Specifications — Installation and Operating Instructions

Bulletin E-53

Model 1823 pressure switch. UL
and CSA Listed, FM and
CENELEC approved.

One of our most popular pressure switches. Combines small

size and low price with 2% repeatability for enough accuracy for
all but the most demanding applications. Set point adjustment
inside the mounting switch on one side of a wall or panel with
adjustment easily accessible on the opposite side.

Series 1823 pressure switch.
Conduit enclosure removed to
show electric switch.

Construction and dimensions. Series 1823 pressure switches.

SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult Factory.
Temperature Limits: -30 to 180°F (-34 to 82.2°C). 1823-00,

-20 to 180°F (-28.9 to 82.2°C).

*Model 1823 shown; (1823 replaces 1820, 1821 and 1822
which are similar).

Environmental (MIL) Switch

Unlisted Model 1820 can be furnished with special snap switch
sealed against the environment for high humidity and/or for
government applications. Similar to standard Model 1823
except dead band is slightly greater. Specify Model 1820
(Range No.) "MIL" in ordering.

Pressure Limits: 10 psig (68.95 kPa) continuous, 25 psig
(172.4 kPa) surge.

Switch Type: Single-pole double-throw (SPDT).
Repeatability: ±2%.
Electrical Rating: 15 A @ 120-480 VAC, 60 Hz. Resistive 1/8

HP @125 VAC, 1/4 HP @ 250 VAC, 60 Hz. De-rate to 10 A for
operation at high cycle rates.
Electrical Connections: 3 screw type, common, normally
open and normally closed.

Process Connections: 1/8˝ female NPT.

SERIES 1823 SWITCHES —
OPERATING RANGES & DEADBANDS

At Min.

0.05

0.06

0.08

0.10

0.14

0.18

0.35

0.56

1.30

Approximate

Dead Band

Operating

Model

Number

1823-00
1823-0
1823-1
1823-2
1823-5
1823-10
1823-20
1823-40
1823-80

DWYER INSTRUMENTS, INC.

Range,

Inches W.C.

0.07 to 0.22

0.15 to 0.5

0.3 to 1.0

0.5 to 2.0

1.5 to 5.0

2.0 to10
3 to 22
5 to 44
9 to 85

Set Point

At Max.

Set Point

0.05

0.06

0.08

0.12

0.28

0.45

0.70

1.10

3.0

Mounting Orientation: Diaphragm in vertical position. Consult
factory for other position orientations.

Set Point Adjustment: Screw type inside mounting spud.
Weight: 1 lb, 5 oz (595 g).
Agency Approvals: CE, UL, CSA, FM.

Phone: [phone] www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]

INSTALLATION

COM.
N.C.

N.O.

1. Select a location free form excessive vibration and where oil
or water will not drip upon the switch. See special housings for
unusual conditions.

2. While not required, positioning the pressure connections
down is recommended. Mount the switch with the diaphragm
in a vertical plane. Switch with the diaphragm in a vertical
plane. Switch must be recalibrated for each change in
operating position.

3. Connect switch to source of pressure differential. Metal tubing
with 1/4" O.D. is recommended but any tubing system which
will not restrict the air flow is satisfactory. Note that the low
pressure connection may be made to the 1/2" spud at the
back of the switch if desired. If so connected, drill 1/16"
diameter holes in the Spring Retainer flange and the head of
Adjustment Screw to provide opening to the switch interior
and plug the other low pressure connection.

4. Electrical connections to the standard single pole, double
throw snap switch are provided by means of screw terminals
marked "common", "norm open", and "norm closed". The
normally open contacts close and the normally closed contact
open when pressure increases beyond the set point.

5. Switch loads should not exceed the maximum specified
current rating of 15 amps resistive. Switch capabilities
decrease with high load inductance or rapid cycle rates.
whenever and application involves one or more of these
factors, the user may find it desirable to limit the switched
current to 10 amps or less in the interest of prolonged switch
life.

ADJUSTMENT

1. If the switch has been factory preset, check the set-point
before placing in service to assure it has not shifted in transit.

2. If switching has not been preset or it is desired to change the
point, observe the following procedure:
a. To adjust the set point turn the slotted Adjustment Screw

clockwise to increase the set point and counterclockwise to
decrease the set point.

b. The following is a recommended procedure for calibrating

or checking calibration: Use a "T" assembly with three
rubber tubing leads, all as short as possible and the entire
assembly offering minimum flow restriction. Run one lead
to the pressure switch, another to a manometer of known
accuracy and appropriate range, and apply pressure
through the third tube. Make final approach to the set point
slowly. Note the manometer and pressure switch will have
different response characteristics due to different internal
volumes, lengths of tubing, oil drainage, etc. Be certain
switch is checked in position it will assume in use, i.e.
vertical, horizontal, etc.

4-1/6

[103.19]

1-1/2 [38.10]

1-1/4 [31.75]

3/32 [2.38]

1-1/2 [38.10] TYP

1/8 FEMALE NPT HIGH

PRESSURE CONNECTION

1-7/16

[36.53]

6 [15.40]

SQ

1/2 FEMALE NPT

CONDUIT

CONNECTION

4 [101.60]

TYP

[76.20]

6-3/4

[171.45] TYP

7-1/2

[190.50]

3

1/8 FEMALE NPT
LOW PRESSURE

CONNECTION

Ø5/16 [7.94]

MOUNTING

HOLES

TYP 4 PLACES

3/4 [19.05]
CLEARANCE FOR
COVER REMOVAL

Weatherproof Enclosure

16 ga. steel enclosure for unusually wet or oily conditions.
Withstands 200 hour salt spray test. Gasketed cover. Weight 5­1/2 lb (2.5 kg). Switch must be installed at factory. Specify
"WP" in addition to switch catalog number.

6-1/2 [165.10]

CLEARANCE FOR

4X Ø.281

[7.14]

1/8 FEMALE NPT

HIGH PRESSURE

CONNECTION

2X 4-1/4
[107.95]

2X 6-1/8
[155.58]

1/8 FEMALE NPT
LOW PRESSURE CONNECTION

COVER REMOVAL

6-5/8 [168.28]

3 [76.20]

1/2 NPT PROCESS
CONNECTION

3X 1-1/16 [26.99]

Explosion-Proof Housing

Cast iron base and aluminum dome cover. Approximate weight
7-1/2 lb (3.4 kg). Specify "EXPL" in addition to switch catalog
number. Rated Class I, Groups C & D, Div. 1. Class II, Groups
E, F, & G, Div. 1.

DWYER INSTRUMENTS, INC.

Phone: [phone] www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]

3-39/64

[91.68]

Ø7/8 [22.23]

CONDUIT

CONNECTION

3-1/8

[79.38]

Ø4

[101.60]

1-27/32

[46.83]

1-1/8

[28.57]

1/8 FEMALE NPT
HIGH PRESSURE

CONNECTION

1/2 MALE NPT

MOUNTING SPUD

1/8 FEMALE NPT
LOW PRESSURE

CONNECTION

3-27/32

[97.63]

2-3/32

[53.18]

2-1/8

[53.98]

CLEARANCE FOR

COVER REMOVAL

3/4

[19.05]

SERIE

1800

Bulletin E-53

Interruptor Para Baja
Presión Diferencial

Model 1823 pressure switch. UL
and CSA Listed, FM approved.

Uno de nuestros mas populares interruptores de presión.

Combina un pequeño tamaño y bajo precio, con una
repetibilidad del 2%, exactitud suficiente para las aplicaciones
con mas demanda. El ajuste del punto de operación en un
extremo, permite instalar el interruptor de un lado en las pared
o tablero, permitiendo acceso al tornillo de ajuste.

Series 1823 pressure switch.
Conduit enclosure removed to
show electric switch.

Construction and dimensions. Series 1823 pressure switches.

SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult Factory.
Temperature Limits: -30 to 180°F (-34 to 82.2°C). 1823-00,

-20 to 180°F (-28.9 to 82.2°C).
Pressure Limits: 10 psig (68.95 kPa) continuous, 25 psig
(172.4 kPa) surge.

Interruptor para Ambiente Húmedo (MIL)

Switch Type: Single-pole double-throw (SPDT).
Repeatability: ±2%.

El modelo 1820 puede ser fabricado son un sello especial a
prueba de intemperie, o para aplicaciones con alta humedad.
Similar al modelo 1823, excepto que la banda de operación es
mayor.

Electrical Rating: 15 A @ 120-480 VAC, 60 Hz. Resistive 1/8
HP @125 VAC, 1/4 HP @ 250 VAC, 60 Hz. De-rate to 10 A for
operation at high cycle rates.
Electrical Connections: 3 screw type, common, normally

Especifique el modelo 1820 (Rango No.) “Mil” en su orden.

open and normally closed.

Process Connections: 1/8˝ female NPT.
Mounting Orientation: Diaphragm in vertical position. Consult

factory for other position orientations.

Set Point Adjustment: Screw type inside mounting spud.
Weight: 1 lb, 5 oz (595 g).
Agency Approvals: CE, UL, CSA, FM.

Phone: [phone] www.dwyer-inst.com

0.05

0.06

0.08

0.10

0.14

0.18

0.35

0.56

1.30

Approximate

Dead Band

At Max.

Set Point

Operating

Model

Number
1823-00

1823-0
1823-1
1823-2
1823-5
1823-10
1823-20
1823-40
1823-80

Especificaciones:

Interruptor de presión diferencial operado por diafragma de 4”, para
activar un interruptor de presión tipo simple polo doble tiro. El
diafragma esta controlado por un resorte calibrado que se puede
ajustar para fijar la presión diferencial exacta a la cual el interruptor
actuara. El movimiento del diagragma es transmitido al botón del
interruptor por un medio mecánico. Interruptor Dwyer Instruments, Inc.
Catalogo No. 1823-__ __ para el rango de operación requerido.

Range,

Inches W.C.

0.07 to 0.22

0.15 to 0.5

0.3 to 1.0

0.5 to 2.0

1.5 to 5.0

2.0 to10
3 to 22
5 to 44
9 to 85

At Min.

Set Point

DWYER INSTRUMENTS, INC.

0.05

0.06

0.08

0.12

0.28

0.45

0.70

1.10

3.0

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]

INSTALACIÓN:

COM.
N.C.

N.O.

1. Seleccione una ubicación libre de vibración excesiva, en donde
el agua o aceite no entre al interruptor. Revise encapsulados
especiales para aplicaciones especiales.

2. Mientras no se requiera otra, las conexión de presión inferior es
recomendada. Monte el interruptor con el diafragma en posición
vertical, el interruptor debe recalibrarse para cada cambio de
posición.

3. Conecte el interruptor a la fuente de presión diferencial. Tubo
metálico con diámetro de 1/4” es recomendado, pero cualquier
sistema de tubería que no restrinja el flujo de aire es bueno.

4. Conexiones eléctricas estándar de los interruptores SPDT,
común, NA y NC. Los contactos cambian cuando se incrementa
la presión del punto de operación.

5. La carga del interruptor no debe exceder los 15 Amp.
Especificados. Las capacidades decrecen con altas cargas
inductivas y ciclos rápidos de actuación, por lo que en estos
casos los limites de corriente deben ser 10 Amp. 0 menores para
incrementar la vida del interruptor.

AJUSTES:

1. Si el interruptor ha sido calibrado en fabrica, revise el punto de
operación antes de ponerlo en servico.

2. De lo contrario, siga los siguientes pasos:
A. Para ajustar el punto de operación, gire el tornillo de
calibración en sentido de las manecillas del reloj para aumentar
el valor y en contra de las manecillas del reloj para dis minuir el
valor del punto de operación.
B. Lo siguiente se recomienda para calibrar o revisar la
calibración: Use una T con tres mangueras plásticas, tan
pequeñas como sean posible. Conecte una manguera al
interruptor de presión, otra al manómetro y por la tercera aplique
la presión de esta forma podrá ajustar el interruptor a la presión

4-1/6

[103.19]

1-1/2 [38.10]

1-1/4 [31.75]

3/32 [2.38]

1-1/2 [38.10] TYP

1/8 FEMALE NPT HIGH

PRESSURE CONNECTION

1-7/16

[36.53]

6 [15.40]

4 [101.60]

SQ

1/2 FEMALE NPT

CONDUIT

CONNECTION

TYP

[76.20]

6-3/4

[171.45] TYP

7-1/2

[190.50]

3

1/8 FEMALE NPT
LOW PRESSURE

CONNECTION

Ø5/16 [7.94]

MOUNTING

HOLES

TYP 4 PLACES

3/4 [19.05]
CLEARANCE FOR
COVER REMOVAL

Encapsulado a Prueba de Intemperie

Encapsulado de acero para condiciones húmedas y/o aceitosas,
soporta pruebas de 200 horas de spray salino, pesa 5-1/2 libras. El
interruptor debe ser instalado en la planta al momento de su
fabricación. Especifique “WP” mas el modelo del interruptor en
catalogo.

requerida lo mas exacto posible.

6-1/2 [165.10]

CLEARANCE FOR

4X Ø.281

[7.14]

1/8 FEMALE NPT

HIGH PRESSURE

CONNECTION

2X 4-1/4
[107.95]

2X 6-1/8
[155.58]

1/8 FEMALE NPT
LOW PRESSURE CONNECTION

COVER REMOVAL

6-5/8 [168.28]

3 [76.20]

1/2 NPT PROCESS
CONNECTION

3X 1-1/16 [26.99]

Encapsulado a Prueba de Explosión

Encapsulado a base de Hierro y Aluminio, pesa aproximadamente 7­1/2 libras. Especifique “EXPL” mas modelo del interruptor en catalogo.

©Copyright 2010 Dwyer Instruments, Inc. Printed in U.S.A. 2/10 FR# 24-440256-00 Rev. 2

DWYER INSTRUMENTS, INC.

Phone: [phone] www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]