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Series 1620 Single and Dual Pressure Switch

Series DP Double Bellows Differential Pressure Switch

Series 1630 Large Diaphragm Pressure Switches

Visual Set Point Adjustment in 5 Standard Ranges, 0.05" to 12" w.c. Repetitive Accuracy within ±1%

On the Series 1630 Large Diaphragm Pressure Switch our highest precision conventional 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.

CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.

Product Applications

Damper positioning
Duct air control
Air conditioning
Industrial service

Starting at $551.35

Ordering

Grouped product items
Model	Description	Availability*	Price
1638-0	Large diaphragm pressure switch, range 0.05-0.25" w.c., approx deadband @ 0.04 min. set point, 0.05 max. set point.	1-3 days*	$551.35
1638-1	Large diaphragm pressure switch, range 0.20-1.0" w.c., approx deadband @ 0.04 min. set point, 0.06 max. set point.	1-3 days*	$551.35
1638-10	Large diaphragm pressure switch, range 3.0-12" w.c., approx deadband @ 0.11 min. set point, 0.30 max. set point.	1-3 days*	$551.35
1638-2	Large diaphragm pressure switch, range 1.0-3.0" w.c., approx deadband @ 0.06 min. set point, 0.08 max. set point.	1-3 days*	$551.35
1638-5	Large diaphragm pressure switch, range 2.0-6.0" w.c., approx deadband @ 0.07 min. set point, 0.25 max. set point.	1-3 days*	$551.35

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.
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:: 3 lb 3 oz (1.50 kg).
Compliance:: CSA, FM, UL.

Features

Options

-MIL Environmental Construction. Unlisted Model 1635 can be furnished with a special snap switch sealed against the environment for high humidity, exposure to fungus, and/or for military applications. Similar to Model 1638 except dead band is slightly greater and some lower set points may not be available. Specify Model 1638-(range no.)-MIL and required set point in ordering.
-WP Weatherproof Housing. 16 ga. steel enclosure for unusually wet or oily conditions. Withstands 200 hour salt spray test. Gasketed cover. Weight: 20 lbs. Switch must be installed at factory. Specify Model 1639-(range no.)-WP when ordering.

Support Library

Approvals

Drawings

Model Chart

EXAMPLE	1635	0	AT	Series 1635-0-AT Large Diaphragm Pressure Switch, range 0.05-0.25" w.c., with aluminum tag.
SERIES	1635 1638 1639			Large Diaphragm Pressure Switch Large Diaphragm Pressure Switch with Conduit Large Diaphragm Pressure Switch without Conduit
RANGE		0 1 2 5 10		0.05 - 0.25" w.c. 0.20-1.0" w.c. 1.0-3.0" w.c. 2.0-6.0" w.c. 3.0-12.0" w.c.
OPTIONS			AT B BGAP GOLD HT LC MIL PRESET SF ST WP	Aluminum Tag Buna-N Elastomers B-Gap Micro Switch Gold Contact Switch High Temperature Less Conduit MIL Switch Preset Silicone Free (includes Buna-N elastomers) Stainless Steel Tag Weatherproof Housing

Reviews

Accessories

Model	Description	Availability*	Price
A-302F-A	303 SS Static pressure tip with mounting flange, for 3/16" I.D. rubber or plastic tubing. 4" insertion depth, includes mounting screws	1-3 days*	$13.25
A-489	4" 303 SS straight static pressure tip with flange, 1/4" hose barb.	1-3 days*	$10.20