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DWYER AP diaphragm operated pressure switch

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.

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Made in USA. brand DWYER, model AP

Fast delivery to Latvia, Estonia and Lithuania. International delivery to Europe, Asia, Africa and other continents available on request
Our warehouse is located in Riga, Latvia.

price by request

Available

Available

Founded in 1931, DWYER manufactures equipment for measurement, conversion and control – pressure, temperature, level, flow.

Advantages

Official distributor in Latvia

Time-tested American, European and Asian brands of control and measurent instruments

Advantages

Special price list for organisations

We offer a significant discount for trade organisations and manufacturing companies

Advantages

Worldwide shipping on request

We take care of all logistics and customs clearance. Fast delivery to Baltic countries

Advantages

After-sales service and support

Warranty service and repair, expert assistance in the operation of the instruments

Description of DWYER AP

PRODUCT APPLICATIONS

  • Low pressure applications
  • Instrument air

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

Technical specifications of DWYER AP

  • 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.
  • Compliance: FM, UL. For FM consult factory.

How to buy DWYER AP

Model Description Price
AP-153-33
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).
$625.05
AP-153-37
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).
$585.50
AP-153-39
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).
$625.05
AP-7021-153-33
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).
$585.50
AP-7021-153-37
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).
$585.50
AP-7021-153-39
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).
$585.50
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Accessories for DWYER AP

Model Description Price
IPV-1 Air hammer. $382.95
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Model Chart DWYER AP

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
APF
APH
APW
APWT
General Purpose Enclosure, NEMA 1
No Enclosure
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
152
153
804
2 Circuit
3 Circuit
26 Circuit
36 Circuit
88 Circuit
152 Circuit
153 Circuit
804 Circuit
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
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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
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User Guide and Instruction manual for DWYER AP

You can request the necessary certificates, documentation, instructions and user guide for DWYER AP using the special form.

You can buy DWYER AP in Latvia at a favourable price in «OLIL SIA» by leaving a request on the website, by phone +371 672 70580 or by email . DWYER AP price are subject to change depending on exchange rates. We deliver instruments by transport companies in Latvia, Estonia and Lithuania. Worldwide shipping to Europe, Asia, Africa, North and South America available on request.