Series AP Diaphragm Operated Pressure Switch

Visible Setpoint Adjustment, Compact

Reliable and convenient, the Series AP Diaphragm Operated Pressure Switch is a compact switch for instrument air or other low pressure applications. Visible set point and external adjustment add convenience. Used on air, non-corrosive gas or liquid service compatible with wetted parts. Units are available in weather-proof and explosion-proof housing.

Product Applications

  • Low pressure applications
  • Instrument air

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

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Model Description Usually Ships* Price Order
AP-153-33
Ships: Same Day
Price: $270.00
Diaphragm operated pressure switch, range 10" vac-50" w.c. (2.5-12.4 kPa), SPDT mercury switch, low deadband 5" w.c. (1.2 kPa), high deadband 6" w.c. (1.49 kPa), max. pressure 15 psig (1.03 bar). Same Day* $270.00 Order
AP-153-37
Ships: Same Day
Price: $254.00
Diaphragm operated pressure switch, range 1-30 psig (.07-2.1 bar), SPDT mercury switch, low deadband 0.4 psig (0.03 bar), high deadband 0.75 psig (0.05 bar), max. pressure 60 psig (4.14 bar). Same Day* $254.00 Order
AP-153-39
Ships: Same Day
Price: $270.00
Diaphragm operated pressure switch, range 10-125 psig (.69-8.6 bar), SPDT mercury switch, low deadband 2 psig (0.14 bar), high deadband 6 psig (0.41 bar), max. pressure 160 psig (11.0 bar). Same Day* $270.00 Order
AP-7021-153-33
Ships: Same Day
Price: $254.00
Diaphragm operated pressure switch, range 10" vac-50" w.c. (2.5-12.4 kPa), SPDT snap switch, low deadband 8" w.c. (2.0 kPa), high deadband 10" w.c. (2.49 kPa), max. pressure 15 psig (1.03 bar). Same Day* $254.00 Order
AP-7021-153-37
Ships: Same Day
Price: $254.00
Diaphragm operated pressure switch, range 1-30 psig (.07-2.1 bar), SPDT snap switch, low deadband 0.75 psig (0.05 bar), high deadband 1.5 psig (0.10 bar), max. pressure 60 psig (4.14 bar). Same Day* $254.00 Order
AP-7021-153-39
Ships: Same Day
Price: $254.00
Diaphragm operated pressure switch, range 10-125 psig (.69-8.6 bar), SPDT snap switch, low deadband 3 psig (0.21 bar), high deadband 7 psig (0.48 bar), max. pressure 160 psig (11.0 bar). Same Day* $254.00 Order

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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 Catalog page.
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: 4 A @ 120 VAC/DC, 2 A @ 240 VAC/DC. Snap switch: 15 A @ 120 VAC, 8 A @ 240 VAC, 0.5 A @ 120 VDC, 0.25 A @ 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 Catalog page.
Agency Approvals:
CE, CSA, FM, UL. For FM consult factory. (Mercury switch units are not CE approved.)

Features

  • Explosion-proof and weatherproof housing provides device protection for outdoor use or harsh environment operation
  • External switch set point adjustment reduces set-up time

Videos

Model Chart

 

EXAMPLE AP 41 153   36   AP-41-153-36, Diaphragm operated pressure switch, range 1 to 20 psig (.07 to 1.4 bar), SPDT mercury switch
MODEL AP
APS
APR
APF
APH
APW
APWT
          General Purpose Enclosure, NEMA 1
No Enclosure
Manual Reset, NEMA 1
Factory Mutual Approved (153-37, 7021-153-37 only)
Explosion-proof Enclosure, NEMA 7, 9
Weatherproof Enclosure with Drain (NEMA 2, 3R)
Weatherproof Enclosure (NEMA 4)
CONSTRUCTION  
 
 
41
7021
8021
7041
8041
        Mercury Switch, Plated Steel Pressure Port, Buna-N Diaphragm
Mercury Switch, 316SS Pressure Port, Buna-N Diaphragm
Snap Switch, Plated Steel Pressure Port, Buna-N Diaphragm (153, 804 only)
Snap Switch, Plated Steel Pressure Port, Buna-N Diaphragm, 440V (153 only)
Snap Switch, 316SS Pressure Port, PTFE Diaphragm (153, 804 only)
Snap Switch, 316SS Pressure Port, PTFE Diaphragm, 440V (153 only)
CIRCUIT     2
3
26
36
88
89
152
153
804
      2 Circuit
3 Circuit
26 Circuit
36 Circuit
88 Circuit
89 Circuit
152 Circuit
153 Circuit
804 Circuit
      L
U
    APR Manual Reset Increasing (2, 3, 26, 36, 153 only)
APR Manual Reset Decreasing (2, 3, 26, 36, 153 only)
RANGE         33
36
37
39
  -10 to 50” w.c. *
1 to 20 psig
1 to 30 psig
10-125 psig
OPTIONS           ATR
ATW
STR
STW
PT
BREATHER
DRAIN
JCT
PRESET
QS3
Aluminum Tag (Riveted)
Aluminum Tag (Wired)
Stainless Steel Tag (Riveted)
Stainless Steel Tag (Wired)
Paper Tag
Breather *
Drain
Junction Box
Preset and Pressure Check Set Point
QS3 Control Certification
Note:   *(1) APH with 33 range must have breather.


**See Electrical Rating Chart below.

ELECTRICAL RATING MERCURY SWITCH

 
CODE CIRCUIT SUFFIX NO. AC CAPACITY DC CAPACITY HORSEPOWER
120V 240V 440V 120V 240V AC DC
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 0.25A 0.125A    

Product Literature

Manuals

Catalog Pages

Approvals

Drawings

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