Dwyer Instruments SERIES SA1100 Catalog Page

SERIES SA1100 | MERCOID® BY DWYER

[188.25]

4 [102.04]

3-31/32

THER

DIAPHRAGM OPERATED PRESSURE SWITCH

Visible Set point, Adjustable Deadband, Hermetically Sealed Snap Switch, Weatherproof and Explosion-Proof

PRESSURE

SWITCH

COVER

[100.62]

3-3/8

[84.91]

COVER SET SCREW

3/4 NPT CONDUIT CONNECTION

3-3/8

[84.58]

The Series SA1100 Diaphragm Operated Pressure Switch is weatherproof and explosion-proof in one economical enclosure. Extremely rugged construction assures excellent reliability in chemical, petroleum and industrial plants. New design also provides burst pressure protection to 3000 psi (206 bar). The rolling diaphragm design maintains a constant effective area to minimize friction. This results in a minimum deadband as low as 5% of full-scale. Since many applications require higher deadbands, the SA1100 includes a separate adjustment of this when necessary. A pump being used to control liquid level in a tank would be a typical situation where this feature would be important. Both set point and deadband adjustments are protected, yet clearly visible behind a clear polycarbonate window and are fully isolated from

the electrical components for additional safety. A 7/16˝ open-end wrench is the only

tool required to change settings. Terminal blocks are provided for switch wiring connections and both internal and external ground screws are included. Standard housing is weatherproof to NEMA standards 1 through 4X and 13; explosion-proof to NEMA 7, Class I, Groups B, C & D; NEMA 9, Class II, Groups E, F & G. Optional construction adds drain to meet NEMA 3R IP54.

FEATURES/BENEFITS

• Explosion-proof and weatherproof housing provides device protection for outdoor use or harsh environment operation

• Burst pressure protection prevents device failure where high-pressure surges may damage device costing down-time and repair/replacement

• Adjustable deadband reduces equipment cycling and potential failure

• Visible set point and deadband adjustments provide an easy and fast check without having to open device causing dangerous conditions to operators

Single Pressure Switches

APPLICATIONS

• Chemical, petroleum, food and drug processing industries

• Used indoor, outdoor or in explosion-proof area

• Pump control

MODEL CHART Example SA11 13 E -A 4 -K 2 SA1113E-A4-K2 Construction SA11 Series designator, weatherproof NEMA 4X, explosion-proof NEMA 7, 9 Adjustable

Pressure Ranges

Circuit (Switch) Options

Pressure Chamber Material (Wetted)

Diaphragm Material (Wetted)

Circuit (Switch) Type

Process Connection

*Options AT

*Options that do not have ATEX.

Examples: SA1111E-A4-K2; SA1111E-S5-K2

DWYER INSTRUMENTS, INC. 90

7-7/16

4-5/8

[116.89]

SPECIFICATIONS Wetted Materials: See pressure chamber and diaphragm material in model chart. *Temperature Limits: -30 to 180°F (-35 to 82°C) standard; ATEX compliant at

Ambient Temperature: -4 to 167°F (-20 to 75°C); Process Temperature: -4 to 167°F (-20 to 75°C).

Pressure Limit: 1200 psig (82.6 bar). *Enclosure Rating: Weatherproof and Explosion-proof. Listed with UL and CSA for

Class I, Groups B, C and D; Class II Groups E, F, and G. ATEX Compliant

4. Meets NEMA 4X (IP66).

EC-Type Certicate KEMA 04ATEX2186 X

ATEX Standards: EN 60079-0:2009; EN 60079-1:2007

IECEx Certied for Ex d IIC T6 Gb

IEC Standards: IEC 60079-0:2007; IEC 60079-1:2007

IECEx Certicate of Conformity: IECEx DEK 11.0095X

Switch Type: SPDT or DPDT snap switch. Electrical Rating: See model chart. Electrical Connections: Screw terminal. Conduit Connection: 3/4˝ female NPT. Process Connection: 1/2˝ female NPT. Mounting Orientation: Within 20° of vertical. Set Point Adjustment: Internal 7/16˝ hex nuts. Weight: 3.5 lb (1.6 kg). Deadband: See deadband chart. *Agency Approvals: ATEX, CE, CSA, UL.

*Options that do not have ATEX.

SWITCH DEADBAND CHART

Range Number

11 12 13

HS HG

A S

4 5

2 1/2 inch female NPT

Adjustable range 10 to 150 psig (0.7-10 bar) Adjustable range 20 to 250 psig (1.4-17.2 bar) Adjustable range 30 to 500 psig (2.0-34.0 bar)

Snap action switch rated 15 A @ 125/250/480 VAC, 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 1/2 A @ 125 VDC resistive, 1/4 A @ 250 VDC resistive Hermetically sealed snap action switch rated 5 A @ 125/250 VAC, 5 A resistive @ 30 VDC* Hermetically sealed snap action switch with gold contacts rated 1A @ 125 VAC, 1 A resistive @ 30 VDC*

Aluminum 316 SS

Buna-N diaphragm and O-ring Fluorocarbon diaphragm and O-ring

SPDT DPDT (not available with HS or HG switch options)

ATEX certied construction

DRAIN

Housing with drain - allows condensate to be drained from inside enclosure (meets NEMA 3R instead of 4X)

3-9/16 [91.19]

II 2 G Ex d IIC T6 Gb Process Temperature 75°C. Weatherproof UL Rated Type

Adjustable Operating Range psig bar psig bar psig bar psig bar

10-150 20-250 30-500

5-25/32 [147.07]

1-13/16

[45.88]

0.7-10

1.4-17.2

2.0-34

3/16 [4.8] DIA. BRACKET MOUNTING HOLES

Approximate Minimum Deadband Low High

4.0

0.28

5.0

0.35

0.83

7.5

12.5 45

ADJUSTMENT

COVER

PROCESS

CONNECTION

Approximate Maximum Deadband

0.52

0.86

150

3.1

300

5.2 10 21

2-1/4

[57.17]

OPTIONAL BREA DRAIN

2813