PRESSURE
®
SINGLE AND DUAL PRESSURE SWITCHES
High Reliability, Repetitive Accuracy within ±1%
Ø9/32 [7.14] MOUNTING
HOLE TYP 2 PLACES
1/2 CONDUIT
CONNECTION
5-7/8
[149.23]
3/4 [19.05]
1-5/16 [33.34]
3-1/16
[77.79] 4-11/16
[119.06]
On the SERIES 1620 our old faithful switch design is still best where highest precision
combined with diaphragm sealed leak proof construction and mounting simplicity are
required. Model 1626 and 1627 differential pressure switches are identical in design
and construction except that Model 1626 has a single electric switch and Model
1627 has dual electric switches. Model 1627 can therefore provide dual control when
required. It can be set to open or close two independent electrical circuits, each preset
for its own actuation pressure. Both units have diaphragm sealed motion take outs
providing maximum protection against leakage.
MODEL CHART
Differential Pressure Switches
Model
1626-1
1626-5
1626-10
1626-20
1627-1
1627-5
1627-10
1627-20
Operating
Range in w.c.
.15 to 1.5
.5 to 6.0
2.0 to 11
8.0 to 24
.15 to 1.5
.5 to 6.0
2.0 to 11
8.0 to 24
1-1/2
[38.10]
8-1/4 [209.55]
7-3/4 [196.85]
45° TYP
R 4-5/16 [109.54]
TYP 2 PLACES
1/8 FEMALE NPT 22.5° 1/8 FEMALE NPT
LOW PRESSURE
HIGH PRESSURE CONNECTION
CONNECTION
SPECIFICATIONS
Service: Air and non-combustible,
compatible gases.
Wetted Materials: Consult factory.
Temperature Limits: -30 to 130°F
( -34.4 to 54.4°C).
Pressure Limits: Max. 50 in w.c. (12.44
kPa) continuous, 2 psig (13.79 kPa)
surge.
Switch Type: 1626 SPDT; 1627, (2)
SPDT.
Repeatability: ±1%.
Electrical Rating: 15 A @ 120-480 VAC,
60 Hz. Resistive, 1/8 HP @ 125 VAC,1/4
HP @ 250 VAC, 60 Hz.
FEATURES/BENEFITS
• Single or dual action switches support consistent designs with similar models, but
with the ability to match specific application needs
• Sealed diaphragm provides leak-proof construction for high accuracy and precision
control
APPLICATIONS
• Damper positioning
3
[76.20]
8-7/8
[225.43]
Electrical Connections: 3 screw type,
common, normally open and normally
closed.
Process Connections: 1/8˝ female
NPT.
Mounting Orientation: Diaphragm in
vertical position. Consult factory for other
position orientations.
Set Point Adjustment: Screw
adjustment.
Weight: Model 1626, 3 Ib, 9.8 oz (1.64
kg); Model 1627, 3 Ib, 11.8 oz (1.69 kg).
Agency Approvals: CE.
• Duct air control
ACCESSORIES
Model
Description
Price
A-489
4˝ straight static pressure tip with flange
$6.67
A-302F-A 303 SS static pressure tip with mounting flange; for 3/16˝ ID rubber
9.10
or plastic tubing; 4˝ insertion depth; includes mounting screws
Approximate Deadband
Adj. Diff.
Between
Min. Set Point Max. Set Point Set Points Price
.10
.20
$243.00
.15
.35
243.00
.25
.65
243.00
.50
1.20
243.00
.10
.20
0.5
277.00
.15
.35
1.2
277.00
.25
.65
2.3
277.00
.50
1.20
5.0
277.00
OPTION
To order add suffix: Description
Price
-MIL
MIL environmental construction +$139.00n
n Items are net priced and are not subject to any discount.
LARGE DIAPHRAGM PRESSURE SWITCHES
Visual Set Point Adjustment in 5 Standard Ranges, 0.05 in to 12 in w.c. Repetitive Accuracy within ±1%
1-1/4
[31.75]
Ø9/32 [7.14] MOUNTING
HOLE TYP 4 PLACES
1/2 [12.70] TYP
2 [50.80] TYP
3/4 [19.05]
3 [76.20]
On the SERIES 1630 our highest precision conventional large diaphragm pressure
switch provides maximum dependability. In addition, it incorporates a visible set point
indicator for maximum convenience. UL and CSA listed, FM approved for general
service. Electrical capability of 15 amps handles most small electrical loads. For use
only with air or compatible gases.
FEATURES/BENEFITS
• Visible set point indicator simplifies operation and trouble shooting
• Large diaphragm provides low range accuracy providing precise control
• Current loads of up to 15 amps supports most small electrical loads supporting a broader range of HVAC and Process applications without the need for additional
relays and components
APPLICATIONS
• Damper positioning
• Duct air control
MODEL CHART
Model
1638-0
1638-1
1638-2
1638-5
1638-10
Operating Range
in w.c.
0.05 to 0.25
0.20 to 1.0
1.0 to 3.0
2.0 to 6.0
3.0 to 12
• Air conditioning
• Industrial service
Approximate Deadband
Min. Set Point Max. Set Point Price
0.04
0.05
$267.00
0.04
0.06
267.00
0.06
0.08
267.00
0.07
0.25
267.00
0.11
0.30
267.00
3-39/64
[91.68]
3-3/32
[78.58]
4 3 [76.20]
[101.60] TYP
5-7/8
[149.23]
6-1/2
[165.10]
Ø7/8 [22.23]
CONDUIT CONNECTION
1/8 FEMALE NPT
HIGH PRESSURE CONNECTION
SCREW TYPE ELECTRICAL
TERMINAL TYPE 3 PLACES
2-1/4 [57.15] CLEARANCE
FOR COVER REMOVAL
SPECIFICATIONS
Service: Air and non-combustible,
compatible gases.
Wetted Materials: Consult factory.
Temperature Limits: -30 to 110°F (-34.4
to 43.3°C).
Pressure Limits: 10 psig (68.95 kPa)
continuous, 25 psig (172.4 kPa) surge.
Switch Type: SPDT.
Repeatability: ±1%.
Electrical Rating: 15 A @ 120-480 VAC,
60 Hz. Resistive 1/8 HP @ 125 VAC, 1/4
HP @ 250 VAC, 60 Hz.
Ø7-3/4
[196.85]
R 4-5/16 [109.54]
TYP 2 PLACES
22.5° 1/8 FEMALE NPT LOW
PRESSURE CONNECTION
Electrical Connections: 3 screw type,
common, normally open and normally
closed.
Process Connections: 1/8˝ female NPT.
Mounting Orientation: Diaphragm in
vertical position. Consult factory for other
position orientations.
Set Point Adjustment: Screw type with
enclosed scale.
Weight: 4 Ib 14 oz (2.21 kg).
Agency Approvals: CSA, FM, UL.
ACCESSORIES
Model
Description
Price
A-489
4˝ straight static pressure tip with flange
$6.67
A-302F-A 303 SS static pressure tip with mounting flange; for 3/16˝ ID rubber 9.10
or plastic tubing; 4˝ insertion depth; includes mounting screws
OPTION
MIL Environmental Construction
Unlisted Model 1635 can be furnished with a special sealed snap switch for protection
against high humidity, fungus and/or military applications. Similar to Model 1638
except deadband is slightly greater and some lower setpoints may not be available.
Note: To order, specify Model 1635-(Range No.)-MIL and required set point and
+$139.00n.
n Items are net priced and are not subject to any discount.
Process Tubing Options: See page 443 (Gage Tubing Accessories)
38
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