Model: 1638-2

Pressure Switch

Properties:

Inside Diameter
0.250 inches all connections
Overall Length
6.500 inches
Overall Height
7.750 inches
Body Diameter
7.750 inches
Unthreaded Mounting Hole Diameter
0.281 inches
Longest Horizontal Distance Between Mounting Centers
2.000 inches
Longest Vertical Distance Between Mounting Centers
3.000 inches
Pressure Switch Type
Differential
Operating Tempurature Rating
Between -30.0 degrees fahrenheit and 110.0 degrees fahrenheit
Mounting Method
Bracket and unthreaded hole
Contact Action Stimulus
Increase
Thread Size
0.125 inches all pressure connection
Mounting Facility Pattern
Four position rectangular
Nonpile-up Contact Arrangement
1 pole, double throw, both positions maintained
Terminal Type
Screw
Contact Load Current Rating
15.0 amperes resistive load first voltage
Contact Load Current Rating
15.0 amperes resistive load second voltage
Contact Adjustability
Actuation point adjustable
Contact Adjustment Range
+1.00/+3.00 actuation point inches of water
Contact Adjustment Type
External actuation point screw with scale
Contact Voltage Rating In Volts
120.0 ac at sea level first voltage
Contact Voltage Rating In Volts
480.0 ac at sea level second voltage
Pressure Connector Type
Plain, threaded internal all connections
Frequency In Hertz
60.0 first voltage
Media For Which Designed
Gas or liquid
Style Designator
Cylindrical w/bracket
Thread Series Designator
Npt all pressure connection
NSN
5930-01-187-8573
Part Number
1638-2
Description
Switch,pressure
CAGE
85274

A switch which is actuated by changes in pressure of any gas or liquid or by changes in a vacuum acting upon its sensing element. Excludes baroswitch; switch, pressure-thermostatic; and switch, sensitive.

Part 1638-2 NSN 5930-01-187-8573

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00206
FIIG:
A048B0
Concept No.:
1
App. Key:
D
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
PMIC:
A
ESD:
ESD:
MMAC:
EH
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
7.0000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061300
UFC:
34410
LTL:
77.5
LCL:
--
WCC:
658
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 8536509065
  • SITC: 77255
  • End Use: Electric apparatus
  • NAICS: 335931
  • USDA: 1

Freight Class: Switches, for a voltage not exceeding 1000 volts, nesoi

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