Dwyer Instruments SERIES DA, SERIES DS Catalog Page

[253.92]

[41.91]

2-1/4

TH'D

SERIES DA/DS | MERCOID® BY DWYER

BOURDON TUBE PRESSURE SWITCH

Pressure Ranges to 8000 psi (551.6 bar)

PRESSURE

[57.15]

8 [203.20]

3-1/2

[88.90]

3-7/8

[98.43]

1-3/4

[44.45]

3/4

CONDUIT

Customers tell us that the Series DA/DS Bourdon Tube Pressure Switch is the best pressure switch made. The Mercoid DA/DS Series is one of the world’s broadest lines of pressure switches. The DA/DS Series has extremely high sensitivity and great repeatability. The DA Models are equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure operating point. Deadband, the difference between high and low setpoints, is adjustable over the full-scale. The DS Models are equipped with a single external adjustment for setting operating point only. For mercury-free switches, choose between the snap action switch or hermetically sealed snap action switch. Hermetically sealed mercury switch also available.

Single Pressure Switches

FEATURES/BENEFITS

• Visible calibrated dial provides an easy and fast check without having to open device causing dangerous conditions to operators

• On/off indication (except hermetically sealed snap switch models) gives operator clear indication of state of switched equipment that could be located in another location

• Adjustableorxeddeadbandsupportscontrolapplicationsbyreducingequipment

wear-out by unnecessary recycling

• External switch set point adjustment reduces set-up time

• Pressure ranges of full vacuum to 8000 psig gives application designers the ability to specify standard equipment, simplifying install and training, and reducing servicing costs

• UL listed, CSA approved, many models FM approved to support rigorous process applications and regulations

• General purpose, weatherproof or explosion-proof enclosures for a variety of indoor or outdoor environments meeting the needs of multiple applications and uses

APPLICATIONS

• Compressors

• Mechanical HVAC or process equipment

• Pump control

7-3/4 [196.9]

Ø6-1/64

[152.8]

1/4 NPT

3-1/2

[88.90]

[2] STD. Ø13/32 MOUNTING HOLES

"U"

"L"

1/2 NPT

DAH DAW

CONDUIT HOLE

CONTROL ADJUSTMENTS

SPECIFICATIONS Wetted Materials: Brass, 403 SS, or 316 SS.

Temperature Limit: 180°F (82°C). Pressure Limit: Maximum pressure of the operating range. Enclosure Rating: General purpose, weatherproof or explosion-proof. Repeatability: ±1% of full operating range, ±1.5% on DS-7300 models. Switch Type: SPST mercury switch, SPDT mercury switch, SPDT snap switch, or

SPDT hermetically sealed snap switch. Other circuit types available.

Electrical Rating: See model charts. Electrical Connections: Screw terminal. Conduit Connection: Generalpurpose:1/2˝holeforconduithub;Weatherproof:

1/2˝conduithub;Explosion-proof:3/4˝femaleNPT. Process Connection: Generalpurposeandweatherproof:1/4˝maleNPT,1/2˝ maleNPTonranges15Sand16S;Explosion-proof:1/2˝maleNPTand1/4˝female

NPT.

Mounting Orientation: Vertical. Set Point Adjustment: Thumbscrew. Weight: Generalpurpose:4lb(1.8kg);Weatherproof:6lb(2.7kg);Explosion-

proof: 8 lb (3.5 kg).

Deadband: See model chart. Agency Approvals: CSA, FM, UL (mercury switch units are not CE approved)

(Consult factory for FM approved models).

7/8

[22.23]

5-3/8

[134.97]

3/4 PIPE THD.

1-5/8

[41.28]

ADJUSTMENT

SCREWS

REAR MOUNTING

2-3/4

[69.08]

1-1/4

[30.40]

FLANGE [3] .203 [5.16]

DIA HOLES AT 120° ON

6-1/2 [165.1] DIA. BOLT CIRCLE

5/8

[15.82]

ADJUSTMENTS 1/4 NPT

1/2˝ CONDUIT HOLE

5/8

[15.88]

GASKETED COVER

GASKET

3-5/8

[92.27]

[26.39]

2-7/8

[71.63]

[177.80]

1-5/8

[201.79]

1/2˝ CONDUIT

HUB

USA: California Proposition 65

DWYER INSTRUMENTS, INC. | 90

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

SERIES DA/DS | MERCOID® BY DWYER

BOURDON TUBE PRESSURE SWITCH

Pressure Ranges to 8000 psi (551.6 bar)

PRESSURE

MODEL CHART - D SERIES PRESSURE SWITCH WITH SNAP ACTION SWITCH AND GENERAL PURPOSE ENCLOSURE

Bourdon Tube Material

Brass Brass Brass Brass Brass Brass Brass Brass Brass Brass Brass 403 stainless steel 403 stainless steel 403 stainless steel 403 stainless steel 403 stainless steel 403 stainless steel 403 stainless steel 403 stainless steel 403 stainless steel 403 stainless steel 403 stainless steel 403 stainless steel 403 stainless steel 316 stainless steel 316 stainless steel 316 stainless steel 316 stainless steel 316 stainless steel 316 stainless steel 316 stainless steel 316 stainless steel 316 stainless steel

Adjustable Operating Range (psig)

0 to 30˝ Hg VAC 10˝ Hg VAC to 12 25˝ Hg VAC to 50

1/8 to 15

1/8 to 20

1 to 35

2 to 60

5 to 100 5 to 150

10 to 200

10 to 300

30˝ Hg VAC to 60 30˝ Hg VAC to 75 2 to 60

5 to 100

10 to 200

10 to 300 40 to 350

25 to 600

50 to 1000 100 to 1500

300 to 2500

500 to 5000 800 to 8000

30˝ Hg VAC to 75

5 to 75 10 to100 10 to 150 10 to 300 30 to 400 75 to 800 100 to 1000

200 to 2500

Adjustable Deadband SPDT: 10 A @ 120/240 VAC

Minimum Deadband (psig) Model Fixed Model Fixed Model

13.5˝ Hg

6 6

7.5 9

13.5

24 24

37.5 18

22.5

13.5

19.5

22.5

28.5

67.5

142.5

195 390 1350

2250

16.5

78 180

285

600

DA-7031-153-2 DA-7031-153-3 DA-7031-153-27 DA-7031-153-1 DA-7031-153-3A DA-7031-153-4 DA-7031-153-5 DA-7031-153-6 DA-7031-153-7 DA-7031-153-8 DA-7031-153-9 DA-7021-153-25S DA-7021-153-26S DA-7021-153-5S DA-7021-153-6S DA-7021-153-8S DA-7021-153-9S DA-7021-153-9AS DA-7021-153-10S DA-7021-153-11S DA-7021-153-12S DA-7021-153-13S DA-7021-153-15S DA-7021-153-16S DA-7041-153-26E DA-7041-153-23E DA-7041-153-6E DA-7041-153-24E DA-7041-153-9E DA-7041-153-21E DA-7041-153-22E DA-7041-153-11E DA-7041-153-13E

Fixed Deadband SPDT: 15 A @ 120/240 AC

3˝ Hg

1.5

2.5

1.5

2.5

3 4 5

3.5

3.5 4 6 6 10

30 60

200

500

3.5 4

3.5 4 8 10

35 75

DS-7231-153-2 DS-7231-153-3 DS-7231-153-27 DS-7231-153-1 DS-7231-153-3A DS-7231-153-4 DS-7231-153-5 DS-7231-153-6 DS-7231-153-7 DS-7231-153-8 DS-7231-153-9 DS-7221-153-25S DS-7221-153-26S DS-7221-153-5S DS-7221-153-6S DS-7221-153-8S DS-7221-153-9S DS-7221-153-9AS DS-7221-153-10S DS-7221-153-11S DS-7221-153-12S DS-7221-153-13S DS-7221-153-15S DS-7221-153-16S DS-7241-153-26E DS-7241-153-23E DS-7241-153-6E DS-7241-153-24E DS-7241-153-9E DS-7241-153-21E DS-7241-153-22E DS-7241-153-11E DS-7241-153-13E

Hermetically Sealed, Fixed Deadband SPDT: 5 A @ 120/240 VAC, 5 A res. @ 30 VDC

5˝ Hg

3.75 3 3 3 3

3.75

5.25

6.75 9

5.25

4.5

5.25

7.125

10.5

10.5 18 33

52.5

90 300

5.25

6.75

37.5

52.5

112.5

DS-7331-153-2 DS-7331-153-3 DS-7331-153-27 DS-7331-153-1 DS-7331-153-3A DS-7331-153-4 DS-7331-153-5 DS-7331-153-6 DS-7331-153-7 DS-7331-153-8 DS-7331-153-9 DS-7321-153-25S DS-7321-153-26S DS-7321-153-5S DS-7321-153-6S DS-7321-153-8S DS-7321-153-9S DS-7321-153-9AS DS-7321-153-10S DS-7321-153-11S DS-7321-153-12S DS-7321-153-13S DS-7321-153-15S DS-7341-153-26E DS-7341-153-23E DS-7341-153-6E DS-7341-153-24E DS-7341-153-9E DS-7341-153-21E DS-7341-153-22E DS-7341-153-11E DS-7341-153-13E

Single Pressure Switches

MODEL CHART - D SERIES PRESSURE SWITCH WITH MERCURY SWITCH AND GENERAL PURPOSE ENCLOSURE

Bourdon Tube Material

Adjustable Operating Range (psig)

30˝ to 0 Hg VAC 10˝ Hg VAC to 12 25˝ Hg VAC to 50

1/8 to 15

1/8 to 20

1 to 35

2 to 60

5 to 100 5 to 150

10 to 200

10 to 300

30˝ Hg VAC to 60 30˝ Hg VAC to 75 2 to 60

5 to 100

10 to 200

10 to 300 40 to 350

25 to 600

50 to 1000 100 to 1500

300 to 2500

500 to 5000 800 to 8000

30˝ Hg VAC to 75

5 to 75 10 to100 10 to 150 10 to 300 30 to 400 75 to 800 100 to 1000

200 to 2500

Adjustable Deadband

Minimum Deadband (psig)

2˝ Hg

3.5 1 1

1.75 3

3.75 6 8

6 8 4 6 8 14 14

60 90 150 450 750 7 3 7 6 18 30 75 100

210

SPDT 4 A @ 120 V, 2 A @ 240 V AC/DC

DA-31-153-2 DA-31-153-3 DA-31-153-27 DA-31-153-1 DA-31-153-3A DA-31-153-4 DA-31-153-5 DA-31-153-6 DA-31-153-7 DA-31-153-8 DA-31-153-9 DA-21-153-25S DA-21-153-26S DA-21-153-5S DA-21-153-6S DA-21-153-8S DA-21-153-9S DA-21-153-9AS DA-21-153-10S DA-21-153-11S DA-21-153-12S DA-21-153-13S DA-21-153-15S DA-21-153-16S DA-41-153-26E DA-41-153-23E DA-41-153-6E DA-41-153-24E DA-41-153-9E DA-41-153-21E DA-41-153-22E DA-41-153-11E DA-41-153-13E

SPST Open on Increase 10 A @ 120 V, 5 A @ 240 V AC/DC

DA-31-2-2 DA-31-2-3 DA-31-2-27 DA-31-2-1 DA-31-2-3A DA-31-2-4 DA-31-2-5 DA-31-2-6 DA-31-2-7 DA-31-2-8 DA-31-2-9 DA-21-2-25S DA-21-2-26S DA-21-2-5S DA-21-2-6S DA-21-2-8S DA-21-2-9S DA-21-2-9AS DA-21-2-10S DA-21-2-11S DA-21-2-12S DA-21-2-13S DA-21-2-15S DA-21-2-16S DA-41-2-26E DA-41-2-23E DA-41-2-6E DA-41-2-24E DA-41-2-9E DA-41-2-21E DA-41-2-22E DA-41-2-11E DA-41-2-13E

SPST Close on Increase 10 A @ 120 V 5 A @ 240 V AC/DC

DA-31-3-2 DA-31-3-3 DA-31-3-27 DA-31-3-1 DA-31-3-3A DA-31-3-4 DA-31-3-5 DA-31-3-6 DA-31-3-7 DA-31-3-8 DA-31-3-9 DA-21-3-25S DA-21-3-26S DA-21-3-5S DA-21-3-6S DA-21-3-8S DA-21-3-9S DA-21-3-9AS DA-21-3-10S DA-21-3-11S DA-21-3-12S DA-21-3-13S DA-21-3-15S DA-21-3-16S DA-41-3-26E DA-41-3-23E DA-41-3-6E DA-41-3-24E DA-41-3-9E DA-41-3-21E DA-41-3-22E DA-41-3-11E DA-41-3-13E

OPTIONS Weatherproof Enclosure - Series DAW Note: To order, add “W” to model number after

DA or DS, change 1 to 3.

Example: DAW-33-153-7 Explosion-Proof Enclosure - Series DAH

Suitable for Class I, Groups C and D; NEMA 7; Class II, Groups E, F, G; Class III NEMA 9 and 9A, Division 1.

Note: To order, add “H” to model number after DA or DS. Example: DAH-31-153-7

FM Approved

For general purpose and explosion-proof models see agency approvals.

Note: To order, add “F” to model number after DA, DS, DAH or DSH.

Examples: DAF-31-153-7 or DAHF-31-153-7 Other Options (Consult Factory)

DPDT switches or other switch types, xed

deadband mercury switch units for low deadband applications, manual reset operation, twostage operation, acetal bushed movement for applications with high amounts of vibration and/

or pulsation, fungus proong, siphon, diaphragm seals, mounting ange and remote connection.

USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

DWYER INSTRUMENTS, INC. |