Install Instructions

Series AP Diaphragm Operated Pressure Switches
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.
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 and AP-41
WITH MERCURY SWITCH (MM/W.C.), [BAR]
Deadband
Range
Number
Circuit Sufx
Number
Switch Action On
Press. Increase
Approx. Switch Deadband
Low High
33 -2
-3
-88
-89
-153
SPST Opens
SPST Closes
SPST Closes
SPST Opens
SPST
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)
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)
36 -2
-3
-26
-36
-88
-89
-153
SPST Opens
SPST Closes
SPST Closes
SPST Opens
SPST Closes
SPST Opens
SPST
1.0 psig (0.07)
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)
2.0 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)
37 -2
-3
-26
-36
-88
-89
-153
SPST Opens
SPST Closes
SPST Closes
SPST Opens
SPST Closes
SPST Opens
SPST
2.0 psig (0.14)
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)
3.0 psig [0.21]
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]
39 -2
-3
-26
-36
-88
-89
-153
SPST Opens
SPST Closes
SPST Closes
SPST Opens
SPST Closes
SPST Opens
SPST
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)
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)
OPERATING RANGES - TYPE AP
WITH SNAP SWITCH (MM/W.C.), [BAR]
Range
Number
Adjustable
Range
Max.
Press.
psig
Single SPDT
(2) SPDT Snap
Switches
Approx. Switch Deadband
Low High Low High
33 10˝ vac-50 in w.c.
(250 vac-1250)
15
(1.0)
8 in w.c.
(205)
10 in w.c.
(250)
4.5 in w.c.
(127)
5 in w.c.
(127)
36 1-20 psig (0.07-
1.4)
60
(4.1)
0.5 psig
(0.04)
1.5 psig
(0.11)
0.75 psig
(0.05)
1.5 psig
(0.11)
37 1-30 psig
(0.07-2.1)
60
(4.1)
0.75 psig
(0.05)
1.5 psig
(0.11)
0.75 psig
(0.05)
1.5 psig
(0.11)
39 10-125 psig
(0.7-8.6)
160
(11)
3 psig
(0.2)
7 psig
(.49)
1.25 psig
(0.09)
4 psig
(0.3)
2-13/32
[61.13]
2-7/8
[73.03]
1-7/16
[36.52]
4
[101.60
]
15/16
[23.81]
4-1/8 [104.78]
1-1/16
[26.99]
4-11/16 [119.36]
5-1/16 [128.69]
3-1/8
[79.71]
1-13/16
[46.05]
7/8 [22.23]
CONDUIT HOLE
Ø7/8 [22.23]
KNOCK-OUT HOLE
[2]Ø1/4
[6.35]
MOUNTING
HOLE WITH
SEALING WIRE
ADJUSTMENT
SCREW WITH
SEALING WIRE
1/4 NPT
MERCOID
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: [phone]
Fax: [phone]
www.dwyer-inst.com
e-mail: [e-mail]
A DIVISION OF
DWYER INSTRUMENTS, INC.
By Dwyer