SOR V1, V3 Quick Manual

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Adjustable Dead Band Pressure Switches

The adjustable dead band

pressure switch should be used when there is a
requirement for an adjustable and wide dead band
between the increasing and decreasing set points.

Function

Alarm: Hi — Lo

Control: On — Off

SORInc.com

V3 Weathertight
Explosion Proof

Hermetically Sealed Switches

• 3-year warranty from date of manufacture

•

Safety Certified to IEC 61508 (SIL) SOR products are certified to IEC 61508 for non-redundant

use in SIL1 and SIL2 Safety Instrumented Systems for most models. For more details or values
applicable to a specific product, see the Safety Integrity Level Quick Guide (Form 1528).

• Wide adjustable dead band

• Independent adjustments for increasing and decreasing Set Points

• Field adjustable with fine resolution of Set Points

• Instrument quality — high repeatability

• High overrange and proof pressures

V1 Weathertight Housing

Design and specifications are

subject to change without notice.

For latest revision, see www.sorinc.com.

• Exceptionally long life

Features and Benefits

• Not critical to vibration

• Wide selection of wetted parts materials for process compatibility and containment

Form 281 (05.18) ©SOR Inc.

SORInc.com | 913-888-2630 | Registered Quality System to ISO 9001

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Adjustable Dead Band
Pressure Switches

Principle

The SOR Adjustable Dead Band pressure switch incorporates two industry proven Static “O” Ring pressure sensing
elements. Media pressure on the areas of the pistons counteracts the forces of the range springs — each
adjustable by a separate adjusting nut — and moves the piston shafts to operate the lever assembly which, in
turn, actuates and deactuates the electrical switching element. Each pressure sensing element of the Adjustable
Dead Band pressure switch is a force balance piston-actuated assembly sealed by a flexible diaphragm and
an o-ring that is static. The only wetted parts are the single pressure port, two diaphragms, and two o-rings all
indicated with asterisks (*) in this illustration.

Electrical Switching

Element (Explosion Proof

Model has Hermetically

Sealed Switching Element

Capsule)

Calibration Scale

Housing

Increasing Set Point

Adjusting Nut

Piston Assembly

Pressure Range Spring

*Diaphragm

*O-Ring

*Pressure Port

Screw Terminal Block
(Weathertight Model Only)

Lever Assembly

Calibration Scale

Decreasing Set Point
Adjusting Nut

Piston Assembly

Pressure Range Spring

*Diaphragm

*O-Ring

Principle Schematic

The lever assembly travel illustrated here has been exaggerated for clarity.

No Pressure: Electrical switching element is
deactuated.

Actuation Deactuation

Pressure equal to or greater than
increasing Set Point: Electrical
switching element is actuated.

Pressure less than increasing Set
Point but greater than decreasing
Set Point: Electrical switching
element remains actuated.

Pressure greater than decreasing Set Point but
less than increasing Set Point. Electrical switching
element remains deactuacted.

Pressure equal to or less than
decreasing Set Point: Electrical
switching element is deactuated.

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Registered Quality System to ISO 9001 | 913-888-2630 | SORInc.com

Form 281 (05.18) ©SOR Inc.

Adjustable Dead Band
Pressure Switches

How to Order

Model Number System

5V1-LA3-N6-C1A-YY



Housing DiaphragmSwitching

Element



How to Order

Information and data in this catalog are formatted to provide a convenient guide to assist
instrument engineers, plant engineers and end users in selecting pressure switches for their
unique applications.

Steps 1 through 5 are required. Step 6 is optional. Orders must have complete model numbers,
i.e. each component must have a designator.

Step 1: Select Adjustable Range from pages 4, 5 and 6 to fill in  and .

Pressure Port Accessories

Step 2: Select Housing. Weathertight or explosion proof/weathertight (page 6).

Step 3: Select electrical Switching Element for electrical service (page 7).

Step 4: Select Diaphragm and O-Ring for process compatibility and containment (page 8).

Step 5: Select Pressure Port for process compatibility and connection (page 9).

Step 6: Select Accessories required for service (page 9).

If Agency Approved, Certified or Listed pressure switches are required, see page 10 for
components that must be specified.

Form 281 (05.18) ©SOR Inc.

SORInc.com | 913-888-2630 | Registered Quality System to ISO 9001

3/16

Adjustable Dead Band
Pressure Switches

Step 1: Adjustable Range

5V1-LA3-N6-C1A-YY

Six adjustable dead band ranges are available. Each adjustable range is displayed on a grid
(pages 5 and 6). Determine the correct adjustable range for the application by checking
increasing and decreasing Set Point requirements against the tables. In the example below,
a contact closure is required when pressure increases to 160 psi. The same contact must
open when pressure decreases to 60 psi. Since 60 psi is within the blue field, the example
grid range is correct for the application.

When the correct range grid is selected, insert range designators  and  from that grid into the
model number.

Step 1

Find the specified increasing Set Point at the top of the graph.

Step 2

Find the specified
decreasing Set
Point along the left
edge of the graph.

80

200

160

120

80

40

Decreasing Set Point (psi)

20

0

Increasing Set Point (psi)

100 120 160 200

5 - 3

1

5 3

2

5V1-LA3-N6-C1A-YY

1st and 4th places in model number

240

Step 3

Following the vertical line
down from the increasing
Set Point.
Follow the horizontal line
across from the
decreasing Set Point.
Any point within the blue
field is acceptable.

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Registered Quality System to ISO 9001 | 913-888-2630 | SORInc.com

Form 281 (05.18) ©SOR Inc.

Adjustable Dead Band
Pressure Switches

Increasing Set Point (psi)

5

22

18

14

10
80

6

40

Decreasing Set Point (psi)

2

0

9

Overrange 750 psi 50 bar
Proof 1000 psi 70 bar

13

1 2

4 4

17

21

25

20

80

60

40

20

Decreasing Set Point (psi)

10

0

Step 1: Adjustable Range

5V1-LA3-N6-C1A-YY

Increasing Set Point (psi)

30 40

Overrange 1500 psi 100 bar
Proof 2500 psi 170 bar

60

1

6 3

80

2

100

80

200

160

120

80

40

Decreasing Set Point (psi)

20

0

Increasing Set Point (psi)

100 120 160 200

Overrange 1500 psi 100 bar

5 - 3

Proof 2500 psi 170 bar

1

5 3

2

240

Increasing Set Point (psi)

150 200 250 350

350

Overrange 2500 psi 170 bar

300

200

100

Decreasing Set Point (psi)

Proof 3875 psi 267 bar

50

0

1

9 4

450

2

Form 281 (05.18) ©SOR Inc.

SORInc.com | 913-888-2630 | Registered Quality System to ISO 9001

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