SEE MORE AT
Request Quote
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
1/16
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.
2/16
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.
4/16
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
5/16
Adjustable Dead Band
Pressure Switches
Increasing Set Point (psi)
300 400 600 800
800
Overrange 2500 psi 170 bar
Proof 3875 psi 267 bar
600
400
200
Decreasing Set Point (psi)
100
0
1
9
2
5
1000
Step 1: Adjustable Range
5V1-LA3-N6-C1A-YY
Increasing Set Point (psi)
600 900 1200 1500
1500
Overrange 2500 psi 170 bar
Proof 3875 psi 267 bar
1200
900
600
300
Decreasing Set Point (psi)
200
100
0
1
9
1750
2
45
Service Description Designator
Non-Hazardous
Locations
Hazardous
Locations
(UL Listed/CSA Certified,
ATEX and SAA Approved
Snap Switch)
Weathertight for non-hazardous service.
NEMA 4, 4X & IP65
Electrical conduit connection: 3/4” NPT(F)
Material: 356 aluminum
Use LA or SA switching element and terminal
block.
Shipping weight: 4 pounds (2 kgs)
See cutaway view on page 2; dimensions on
page 14.
Explosion proof and weathertight. NEMA 4, 4X &
IP65. Class I, Group A, B, C, D;
Class II, Group E, F, G; Division 1 & 2
Electrical conduit connection: 3/4” NPT(F)
Material: 356 aluminum
Use AG switching element; hermetically sealed SS
capsule
Shipping weight: 5 pounds (2.5 kgs)
Step 2: Housing
5V1-LA3-N6-C1A-YY
V1
V3
6/16
Registered Quality System to ISO 9001 | 913-888-2630 | SORInc.com
Form 281 (05.18) ©SOR Inc.
Adjustable Dead Band
Pressure Switches
Switching
Element
Service
Normal
Service AC
Very High
Capacity
DC
Magnetic
Blow-out
AC or DC DPDT
Contact
Form
SPDT
Electrical
Connection
Type
Screw
Terminal
Block
18” 18 AWG
color-coded
wire leads
3/4” NPT(M)
conduit
connection
AC Rating DC Rating Resistive
Volts Amps Volts Amps Volts Amps Deg F
250 15 125 .5 30 10* 180 80 LA N/A
125 10 125
250 11 125 .5* 30 5.0 160 70 N/A AG
Step 3: Switching Elements
5V1-LA3-N6-C1A-YY
Maximum
1.5
Min.
10.0
Max.
Ambient
Temperature
Deg C
- - 180 80 SA N/A
Designator
SPDT DPDT
1. The switching elements shown
above are UL Listed and CSA
Certified. The DC current rating
marked (*) is not UL Listed but has
been verified by testing and/or
experienced.
2. The hermetically sealed switching
element capsule is UL Listed, CSA
Certified and SAA Approved as a
snap switch in accordance with the
following table.
3. Consult the factory for availability of
SAA Approved units.
Agency
UL Listed
Hazardous Location
Conditions
Class I,
Group A, B, C, D;
Class II,
Group E, F, G;
CSA Certified
SAA Note 3
Approved
Division 1 & 2
Ex s Zone 2 IIC T4 IP65
Ex tD A22 T105 °C IP65
ATEX Approved II 2 G EEx m II
Designator
AG
Form 281 (05.18) ©SOR Inc.
SORInc.com | 913-888-2630 | Registered Quality System to ISO 9001
7/16
Adjustable Dead Band
Pressure Switches
Notes
1. N4 diaphragm system is standard. It is
normally suitable for air, oil, water and noncorrosive processes.
2. Other diaphragm and o-ring combinations
may be available. Consult the factory or the
SOR representative in your area for more
information.
3. Wetted parts have been selected as representing the most suitable commercially
available material for use in the service
intended. However, they do not constitute a
guarantee against corrosion or permeation,
since processes vary form plant to plant and
concentration of harmful fluids, gases or
solids vary from time to time in a given
process. Emperical experience by users
should be the final guide. Alternate materials
based on this are generally available.
4. Specify N3 diaphragm system for high cycle
rate, high shock applications where Buna-N
and TCP are compatible with the process.
5. This table shows allowable minimum and
maximum temperature for o-rings.
Step 4: Diaphragm and O-Ring
5V1-LA3-N6-C1A-YY
O-Ring
(Wetted)
Viton
Kalrez A6
Viton
Kalrez H6
Viton
Kalrez J6
Viton
Kalrez L6
Viton GLT
Buna-N M2
Viton M4
Neoprene M5
Kalrez M7
Aflas M8
EPR M9 Note 6
Viton
Diaphragm
(Wetted)
Monel
Hastelloy-B
Hastelloy-C
Carpenter-20
316L SS
Designator
A4
H4
J4
L4
M1
N1
O-Ring Material ° F ° C
Viton 32 to 400 0 to 204
Viton GLT -20 to 400 -29 to 204
Kalrez* 5 to 400 -15 to 204
Aflas 25 to 400 -4 to 204
Buna-N
Neoprene EPR
TCP Teflon Coated
Polyimide
Diaphragm
*Kalrez or equivalent
Perfluoroelastomer (FFKM) o-rings
-30 to 200 -34 to 93
-30 to 400 -34 to 204
6. M9 diaphragm system is suggested for
steam applications up to 400oF.
7. Dead bands are slightly higher when using
H, J, W, N3, or N6 series diaphragm options.
Consult the factory.
Buna-N N3 Note 4
Buna-N
Kalrez N5
Kalrez Kalrez N6
EPR
Aflas N8
Buna-N Buna-N P1
Neoprene Neoprene R1
Viton
Viton GLT S2
Buna-N
Viton W4
Neoprene W5
Kalrez W6
EPR
Ethylene
Propylene
Ethylene Propylene
TCP
Teflon-Coated
Polyimide
TCP
Teflon-Coated
Polyimide
Viton
Tantalum
EPR
N4 Standard
Note 1
N7
S1
W2
Y1
8/16
Registered Quality System to ISO 9001 | 913-888-2630 | SORInc.com
Form 281 (05.18) ©SOR Inc.
Adjustable Dead Band
Pressure Switches
Step 5: Pressure Port
5V1-LA3-N6-C1A-YY
Material Connection Designator
Aluminum Alloy 356
copper-free casting
316SS CF-8M Casting
1/4” NPT(F) B1A
1/2” NPT(F) B2A
1/4” NPT(F) C1A
1/2” NPT(F) C2A
Step 6: Accessories
5V1-LA3-N6-C1A-YY
Accessory / Option & Description Designator
Wetted parts are cleaned for industrial oxygen service. BB
CSA Certified pressure switch. Available with V1 housing. Housing has earth (ground) lug.
See agency listings on page 10 for details.
Cemented cover gasket on weathertight housing. GC
Universal terminal box, 1/2” NPT(F). 316SS. Explosion proof. FM Approved; CSA Certified.
See form 657 (Catalog GI-30).
Vacuum protector plate retains diaphragm system in the pressure switch if subjected to
intermittent vacuum greater than 10 in Hg. If a pressure switch is subjected to continuous, rapid changes of vacuum, other protection may be available (consult factory). Material
matches or exceeds pressure port material.
Compliance to NACE Certification MR0175/ISO 15156* NC
Pipe (stanchion) mounting kit for (1-1/2” to 2” pipe). Order as a separate line item for CSA
Certified pressure switches.
Tag, fiber. Attached with plastic wire to housing. Stamped with customer-specified tagging
information.
Powder coat epoxy coating. No coating on stainless steel parts or plated screws.
(500 hours-salt spray)
Tag, stainless steel. Attached with stainless steel wire to housing. Stamped with customer
specified tagging information. (2 lines, 18 characters and spaces per line.)
Stainless steel piston and cylinder disc for corrosion resistance. SP
Explosion proof and weathertight electrical junction box with screw terminals. Aluminum
3/4” NPT(F) top or right conduit connections as required. UL Listed and CSA Certified
Class I, Groups A, B, C & D; Class II, Group E, F & G; Division 1 & 2. Includes cover o-ring
for weathertight applications. (V3 housing only.)
Oversize stainless steel nameplate. Permanently attached to housing. Stamped with
customer specified tagging information
Fungicidal varnish. Covers exterior and interior except working parts. VV
Epoxy coating. Exterior only. Polyimide epoxy with 316SS pigment. (200 hours-salt spray) YY
Chained cover with captive screws to conform to former JIC specification ZZ
“X” is used as a suffix to the model number for special requirements not keyed elsewhere in
the model number by an “X”. Each “X” must be completely identified in the text of the order
or inquiry. When more than one “X” is required, use “X” followed by the number of such
items. For example, “X3” means three separate, otherwise unidentifiable requirements.
CS
HT
MM
PK
PP
PY
RR
TB
TT
X
Form 281 (05.18) ©SOR Inc.
SORInc.com | 913-888-2630 | Registered Quality System to ISO 9001
9/16
Adjustable Dead Band
Pressure Switches
Certificates C1 C2 C3 C4 C5 C6 C8 B1 B4 B5 B6 B7 A1 A2 A3 A4 A5 A6 A7 A8
Calibration
Hydrostatic Pressure Test
Inspection Report
Compliance / Conformance
Dielectric Test
Insulation Resistance
Typical Material of
Wetted Parts
¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿
¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿
¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿
¿ ¿ ¿ ¿ ¿ ¿ ¿
¿ ¿ ¿ ¿
¿ ¿ ¿ ¿ ¿ ¿ ¿
¿ ¿ ¿ ¿ ¿ ¿
Test Certificates
Agency Listings
The following combinations only are available as approved, certified or listed by the agencies shown. Some
components are for products not offered in this catalog. Certain components or combinations may acquire
additional approval, certification or listing between print dates of this catalog. Contact the factory for the most
current information.
CSA Enclosure 4 (Weathertight)
Piston Housing
Switching
Element
All V1 LA, SA All All All
Spring
Diaphragm
& O-Ring
Pressure Port
Material &
Connection Size
Accessories/
Option
CS Required
All except TB
10/16
Registered Quality System to ISO 9001 | 913-888-2630 | SORInc.com
Form 281 (05.18) ©SOR Inc.
Adjustable Dead Band
Pressure Switches
SOR recognizes that there is no industry convention with respect to terminology and definitions
pertinent to pressure switches. This glossary applies to SOR Pressure Switches.
Adjustable Range
The span of pressure between upper and lower
limits within which the pressure switch may be
adjusted to actuate/deactuate.
Dead Band
The difference in pressure between the
increasing Set Point and decreasing Set Point.
Decreasing Set Point
That discrete pressure at which the pressure
switch is adjusted to deactuate on falling
pressure. It must fall within the adjustable range.
Hermetically Sealed
A welded steel capsule with glass-to-metal,
factory-sealed, electrical leads that isolates
the electrical switching element(s) from the
environment.
Increasing Set Point
That discrete pressure at which the pressure
switch is adjusted to actuate on rising pressure.
It must fall within the adjustable range.
Proof Pressure
The maximum input pressure that may be
continuously applied to the pressure switch
without causing leakage or catastrophic
material failure. Permanent change of Set
Point may occur, or destruction of the device
may be rendered inoperative.
Repeatability
The ability of a pressure switch to successively
operate at a Set Point that is approached from a
starting point in the same direction and
returns to the starting point over three
consecutive cycles to establish a pressure
profile. The closeness of the measured Set Point
values is normally expressed as a percentage of
full scale (maximum adjustable range pressure).
SPDT Switching Element
Single-Pole, Double Throw (SPDT) has three
connections: C — Common, NO — Normally
Open and NC — Normally Closed, which allows
the switching element to be electrically
connected to the circuit in either NO or
NC state.
Glossary of Terms
Overrange
The maximum input pressure that may be
continuously applied to the pressure switch
without causing permanent change of Set Point,
leakage or material failure.
Pressure Switch
A bi-stable electromechanical device that
actuates/deactuates one or more electrical
switching element(s) at a predetermined discrete
pressure/vacuum (Set Point) upon rising or
falling pressure/vacuum.
Form 281 (05.18) ©SOR Inc.
DPDT Switching Element
DPDT is two synchronized SPDT switching
elements which actuate together at increasing
Set Point and deactuate together at decreasing
Set Point. Discrete SPDT switching elements
allow two independent circuits to be switched;
i.e., one AC and one DC.
The synchronization linkage is factory set, and is
not field adjustable. Synchronization is verified by
connecting test lamps to the switching elements
and observing them go “On” simultaneously at
actuation and “Off” simultaneously at deactuation.
SORInc.com | 913-888-2630 | Registered Quality System to ISO 9001
11/16
Adjustable Dead Band
Pressure Switches
Dimensions in this catalog are for reference only. They may be changed without notice. Contact the
factory for certified drawings for a particular model number. Dimensions are expressed as millimeters
over inches (Linear = mm/in.).
Dimensions
Drawing 0090300
Pipe Mounting Kit: PK
Drawing 0091353
Junction Box with Terminal Block: TB
12/16
Registered Quality System to ISO 9001 | 913-888-2630 | SORInc.com
Form 281 (05.18) ©SOR Inc.
Adjustable Dead Band
Pressure Switches
Dimensions
Drawing 0090763
Junction Box with Terminal Block: HT
Weights
V1 Housing V3 Housing
4 lbs (2 kgs) 5 lbs (2.5 kgs)
Pk Pipe Kit 1.5 0.7
TB Junction box with
Terminal Block
Actual shipping weights may vary from the charted values because of product material,
configuration and packaging requirements.
Accessory Add lbs kgs
5 2.25
Form 281 (05.18) ©SOR Inc.
SORInc.com | 913-888-2630 | Registered Quality System to ISO 9001
13/16
Adjustable Dead Band
Pressure Switches
Dimensions in this catalog are for reference only. They may be changed without notice. Contact the
factory for certified drawings for a particular model number. Dimensions are expressed as millimeters
over inches (Linear = mm/in.).
Housing Dimensions
Drawing 0090236
Non-Hazardous Locations
Weathertight NEMA 4, 4X, IP65
Housing Designator: V1
Drawing 0090325
Hazardous Locations
Contains Explosion Proof, Hermetically Sealed Switching Element Capsule: UL Listed, CSA Certified, ATEX and SAA Approved
Housing Designator: V3
14/16
Registered Quality System to ISO 9001 | 913-888-2630 | SORInc.com
Form 281 (05.18) ©SOR Inc.
Notes
Form 281 (05.18) ©SOR Inc.
SORInc.com | 913-888-2630 | Registered Quality System to ISO 9001
15/16
SOR Inc. | Lenexa, KS USA | 913-888-2630 | Fax 913-888-0767 | SORInc.com
REGIONAL OFFICES
China
SOR China | Beijing, China
+86 (10) 5820 8767 | Fax +86 (10) 58 20 8770
Middle East
SOR Measurement & Control Equipment Trading DMCC | Dubai, UAE
+971 4 278 9632 | Fax +971 4 279 8399
16/16
Registered Quality System to ISO 9001 | 913-888-2630 | SORInc.com
Form 281 (05.18) ©SOR Inc.
Loading...