Dwyer Instruments Series AP Diaphragm Operated Pressure Switches Installation and Operating Instructions

Series AP Diaphragm Operated Pressure Switches

[73.03]

]

1-1/16

By Dwyer

Specications - Installation and Operating Instructions

Bulletin O6S

Series AP Diaphragm Operated Pressure Switches are reliable, convenient, compact, low-cost switches for instrument air or other low-pressure applications. Visible set point and external adjustment add convenience. Used on air, noncorrosive gas or liquid service compatible with wetted parts. These switches are available with optional weather-proof and explosion-proof housings.

OPERATING RANGES - TYPE AP and AP-41 WITH MERCURY SWITCH (MM/W.C.), [BAR]

Deadband Range Number

33 -2

36 -2

37 -2

39 -2

Circuit Sufx Number

-3

-88

-89

-153

-3

-26

-36

-88

-89

-153

-3

-26

-36

-88

-89

-153

-3

-26

-36

-88

-89

-153

Switch Action On Press. Increase

SPST Opens SPST Closes SPST Closes SPST Opens SPST

SPST Opens SPST Closes SPST Closes SPST Opens SPST Closes SPST Opens SPST

Approx. Switch Deadband

Low High

8 in w.c. (205) 8 in w.c. (205) 3 in w.c. (80) 4 in w.c. (102) 5 in w.c. (127)

1.0 psig (0.07)

1.5 psig (0.10)

1.5 psig (0.10) 4 in w.c. (102) 6 in w.c. (152)

0.3 psig (0.02)

2.0 psig (0.14)

2.5 psig (0.17)

2.5 psig (0.17) 6 in w.c. (152) 8 in w.c. (205)

0.8 psig (0.06) 6 psig (0.41)

8 psig (0.55) 8 psig (0.55) 8 psig (0.55)

1.5 psig (0.10)

1.5 psig (0.10) 4 psig (0.28)

10 in w.c. (250) 10 in w.c. (250) 3 in w.c. (80) 4 in w.c. (102) 6 in w.c. (152)

2.0 psig (0.14)

2.5 psig (0.17)

2.5 psig (0.17) 8 in w.c. (205) 12 in w.c. (305)

0.5 psig (0.03)

3.0 psig [0.21]

3.5 psig [0.24]

3.5 psig [0.24] 12 in w.c. (305) 16 in w.c. (406)

1.5 psig [0.11] 16 psig (1.10)

17 psig (1.17) 20 psig (1.38) 20 psig (1.38)

3.0 psig (0.21)

3.0 psig (0.21) 10 psig (0.69)

15/16

[23.81]

SPECIFICATIONS Wetted Materials: Nylon reinforced Buna-N and steel. PTFE and 316 SS

optional.

Temperature Limits: -30 to 150°F (-35 to 66°C). Pressure Limit: See model chart. Enclosure Rating: General purpose. Weatherproof and explosion-proof optional. Switch Type: SPDT mercury switch or SPDT snap switch. Other switch types

available. Electrical Rating: Mercury switch: 4A @ 120 VAC/DC, 2A @ 240 VAC/DC. Snap switch: 15A @ 120 VAC, 8A @ 240VAC, 0.5A @ 120 VDC, 0.25A @ 240 VDC.

Electrical Connections: Screw terminal. Conduit Connection: 7/8˝ (22.23 mm) hole for 1/2˝ (12.7 mm) conduit hub. Process Connection: 1/4˝ female NPT. Mounting Orientation: Vertical for mercury switch models, any position for snap

switch models.

Set Point Adjustment: External screw. Weight: General purpose: 2 lb (0.9 kg). Deadband: See model chart. Agency Approvals: UL, CSA. For FM consult factory.

OPERATING RANGES - TYPE AP WITH SNAP SWITCH (MM/W.C.), [BAR]

Range Number

33 10˝ vac-50 in w.c.

36 1-20 psig (0.07-

37 1-30 psig

39 10-125 psig

7/8 [22.23] CONDUIT HOLE

2-7/8

Adjustable Range

(250 vac-1250)

1.4)

(0.07-2.1)

(0.7-8.6)

Ø7/8 [22.23]

KNOCK-OUT HOLE

2-13/32

[61.13]

SEALING WIRE

1-7/16 [36.52]

[26.99]

5-1/16 [128.69]

4-11/16 [119.36]

[2]Ø1/4

[6.35]

MOUNTING

HOLE WITH

Max. Press.

psig

15 (1.0)

60 (4.1)

60 (4.1) 160 (11)

1-13/16

[46.05]

Single SPDT Approx. Switch Deadband Low High Low High

8 in w.c. (205)

0.5 psig (0.04)

0.75 psig (0.05) 3 psig (0.2)

1/4 NPT

4-1/8 [104.78]

10 in w.c. (250)

1.5 psig (0.11)

1.5 psig (0.11) 7 psig (.49)

3-1/8

[79.71]

ADJUSTMENT SCREW WITH SEALING WIRE

(2) SPDT Snap

Switches

4.5 in w.c. (127)

0.75 psig (0.05)

1.25 psig (0.09)

5 in w.c. (127)

1.5 psig (0.11)

1.5 psig (0.11) 4 psig (0.3)

[101.60

MERCOID

A DIVISION OF DWYER INSTRUMENTS, INC.

MODEL CHART

Example AP - - 153 - 36 Construction AP

Reset Options

Housing Options

Circuit

(Switching) Options

Wetted

Materials

Adjustable

Pressure

Ranges and Maximum Operating

Pressures

*See chart below

S WT W H

70__

70__ 80__

__ 41 7021 8021 7041 8041

ULManual reset - operates on decrease automatically. NEMA-1 only.

2 3 26

88 89 153 ( ) 153

804 153

AP-153-36 Pressure Control, xed deadband, automatic reset, SPDT mercury switch, adjustable range 1-20 psig (0.07-1.4 bar), maximum pressure 60 psig (4.1 bar)

General purpose enclosure, NEMA-1. Low pressure steam switch, NEMA-1, range 34 only. Circuits, 2, 3, 26, 36, 153 only. PTFE covered diaphragm, plated steel pressure port. Factory mutual approved, NEMA-1, circuit 153 only. Range 37 only. APF-153-37 or APF-7021-153-37 only.

Not available with circuit 88, 89 or snap switch type. Manual reset - operates on increase automatically. NEMA-1 only. Not available with circuit 88, 89 or snap switch type. Less enclosure Weather-proof enclosure, NEMA-4. Weather-proof enclosure with condensate drain, NEMA-2, 3R. Explosion-proof enclosure, NEMA-7, 9, Class I Group, C & D; Class II Group E, F & G. SPST mercury switch, Electrical code P* - opens on pressure increase. SPST mercury switch, Electrical code P*- closes on pressure increase. SPST mercury switch, Electircal code R* - closes on pressure increase. Not available with range 33. SPST mercury switch, Electrical code R* - opens on pressure increase. Not available with range 33. SPST magnetic mercury switch, Electrical code T* - closes on pressure increase. SPST magnetic mercury switch, Electrical code T* - opens on pressure increase. SPDT mercury switch, Electrical code S*. Other circuits available, consult factory. SPDT snap acting switch, rated 15A at 120 VAC, 8A at 240 VAC, 0.5A at 120 VDC, 0.25A at 240 VDC, 3/4 hp at 120 VAC, 1 hp at 240 VAC. DPDT: 2 each SPDT snap acting switches, rated 5A at 120/240 VAC, 5A at 30 VDC resistive SPDT snap acting switch, rated 15A at 120 VAC, 8A at 240 VAC, 4A at 480 VAC, 6A at 24 VDC resistive,

0.5A at 120 VDC, 0.25A at 240 VAC, 3/4 hp at 120 VAC, 1.5 hp at 240 VAC. Mercury switch type. Plated steel pressure port, Buna-N diaphragm. Mercury switch type. 316 SS pressure port, PTFE diaphragm. Snap switch type. Plated steel pressure port, Buna-N diaphragm. Snap switch type. Plated steel pressure port, Buna-N diaphragm. Snap switch type, 316 SS pressure port, PTFE diaphragm. Snap switch type, 316 SS pressure port, PTFE diaphragm.

Adjustable range 10˝ wc VAC -50 in w.c (250 mm VAC to 1250 mm w.c.), maximum pressure 15 psig.

Adjustable range 1-15 psig (0.07 to bar), AS only, maximum pressure 30 psig (2.1 bar), maximum

temperature 275°F (135°C) psig.

Adjustable range 1-20 psig (0.07-1.4 bar), maximum pressure 60 psig (4.1 bar).

Adjustable range 1-30 psig (0.07-2.1 bar), maximum pressure 60 psig (4.1 bar).

Adjustable range 10-125 psig (0.7-8.6 bar), maximum pressure 160 psig (11 bar).

UL UL

UL FM

UL UL UL UL UL

UL UL

UL UL UL UL

CSA

CSA CSA CSA

CSA

CSA CSA

CSA

CSA CSA CSA CSA

ELECTRICAL RATING MERCURY SWITCH

Circuit

Code

Sufx No.

P -2, -3 10A 5A 3A 10A 5A 3/4 1/3

R -26, -36 17A AT 120/240/277 VAC, Resistive balance same as above.

S -153 4A 2A NA 4A 2A 1/8 NA

T -88,-89 0.5A 0.25A NA 0.125A 0.125A

AC Capacity DC Capacity Horsepower 120V 240V 440V 120V 240V AC DC

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