J21K-127 | United Electric | Pressure Components
Differential Pressure Switch, 30 "Hg Vacuum-0
Brand:United Electric
MPN:J21K-127
SKU:J21K-127
List Price:
$1,118.00
Today's Price:
$581.36
Log in for customized pricingproduct specifications
Measurement
PSID
Media Compatibility
Liquid,Gas
Connection Size
1/4 in
Type
Adjustable
Connection
NPTF
Housing Material
Epoxy-Coated Diecast Aluminum, Gasketed Enclosure
Switch Output
SPDT
Process Connection Dimensions
Brass Pressure Conn
Contact Rating
15A @ 125/250/480 VAC Resistive
Power Required
Switch
Repeatability
1%
Enclosure Rating
NEMA 4X
Process Variable
Differential Pressure
Contact Type
SPDT
Measurement Range
30 In HgVAC - 0 PSID
Switch Rating
15A @ 125/250/480 VAC Resistive
Working Pressure
30" HgVac - 0 PSI
Proof Pressure
15 PSID
Deadband
0.4 - 0.6" Hg
Pressure Connection
1/4 in NPTF
Adjustments
Internal Adjustment
Approvals
CE,UL,cUL
Electrical Connection
7/8" Diam Conduit Hole
Wetted Materials
Brass Bellows and Pressure Conn
Supply Voltage (Nominal)
480 VAC
Direction
Uni-Directional
product series specifications
Relay Type: SPDT C-->N.O. @ setpoint Pressure rise
Relay Rating: 15 A resistive, 125/250/480 VAC
Setpoint: Internal Adjustment red 5/16 hex nut
Range: 0 to 90 psid (0 to 620 kPa) (model specific)
Repeatability: ±1% over full range
Reset: Automatic reset by differential
Overpressure: (Burst) 180 psid (1241 kPa)
Max Operating Pressure: (Proof)
Operating Temperature: -40° to 160°F (-40° to 71°C)
Operating Humidity: 10 to 90% Non-condensing
Wetted Parts: Brass, Bronze or SS bellows (See ordering)
Media Compatibility: Water, Glycol and Inert dry air
Process Connection: 1/4" FNPT
Wiring Terminations: 3 Screw terminals (Com, NO, NC), 14 AWG max
Mounting: 2 tab holes 0.25" dia
Enclosure Rating: Cast aluminum with 7/8" conduit hole, NEMA 4X
product series features
- Adjustable setpoint
- Sealed metal bellows
- 15A switch rating
- Epoxy coated enclosure
more information & related documents
Series Description
The J21K Series Differential Pressure Switches utilize opposing metal bellows to detect pressure differences between two pressure sources. When the pressure at the high port exceeds the pressure at the low port by a pre-determined amount (set point), it activates the differential pressure switch with a single snap-action. These differential pressure switches are ideal for HVAC, industrial and building automation systems applications. To adjust the control set point, turn the internal hex screw.
Kele Description
DIFF PRESS SW, ADJUST, 30 "HG VACUUM-0
Manufacturer
United Electric
Related Documents
UE-IMJ21K-10-2025-03 
