United Electric J21K-254 Pressure Switch
The United Electric J21K-254 Pressure Switch is an essential component for demanding HVACR and industrial filtration applications, specifically designed to monitor differential pressure with high precision. This 0/90# SPDT NEMA1 Pressure Sw. features opposing metal bellows that accurately sense the pressure delta between two points, making it ideal for differential pressure switch hvac tasks such as monitoring chiller oil pressure, filter status monitoring, and verifying proof of flow in pump systems. The J21K-254 is electrically identical to the J21K-254-9545, ensuring seamless replacement in legacy installations. For contractors, the internal 5/16 hex nut allows for a field adjustable pressure switch setup across a range of 0 to 90 psid. Its rugged design includes a 1/4" NPT process connection and an SPDT snap-action switch rated at 15A, providing reliable United Electric Controls J21K series performance for compressor control and safety shutdown circuits.
Key Benefits for the Technician- High Load Capacity: Equipped with a 15A SPDT switch, handling resistive loads up to 480 VAC without external relays.
- Precise Control: Features a repeatable ±1% range accuracy with a 2 to 4 PSI deadband for tight system cycling.
- Industrial Build: Utilizes phosphor bronze bellows and a gasketed diecast aluminum enclosure for long-term reliability in mechanical rooms.
- Drop-in Compatibility: Perfectly replaces J21K-254-9545 units without requiring recalibration or piping modifications.
Is the United Electric J21K-254 suitable for water systems?
Yes, the phosphor bronze wetted parts and metal bellows are compatible with water, glycol, and inert dry air systems commonly found in commercial HVAC cooling towers and chillers.
How do I adjust the pressure setpoint?
Adjustment is performed internally via a 5/16" hex head screw. Turn clockwise to raise the setpoint and counter-clockwise to lower it; always verify with a calibrated gauge during commissioning.
Can I use this for outdoor installations?
While the J21K-254 is housed in a NEMA 1 enclosure intended for indoor use, Ensure the electrical conduit is properly sealed to prevent moisture ingress into the mechanism.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $483.04
-65%$483.04
$169.06United Electric J21K-254 Pressure Switch
The United Electric J21K-254 Pressure Switch is an essential component for demanding HVACR and industrial filtration applications, specifically designed to monitor differential pressure with high precision. This 0/90# SPDT NEMA1 Pressure Sw. features opposing metal bellows that accurately sense the pressure delta between two points, making it ideal for differential pressure switch hvac tasks such as monitoring chiller oil pressure, filter status monitoring, and verifying proof of flow in pump systems. The J21K-254 is electrically identical to the J21K-254-9545, ensuring seamless replacement in legacy installations. For contractors, the internal 5/16 hex nut allows for a field adjustable pressure switch setup across a range of 0 to 90 psid. Its rugged design includes a 1/4" NPT process connection and an SPDT snap-action switch rated at 15A, providing reliable United Electric Controls J21K series performance for compressor control and safety shutdown circuits.
Key Benefits for the Technician- High Load Capacity: Equipped with a 15A SPDT switch, handling resistive loads up to 480 VAC without external relays.
- Precise Control: Features a repeatable ±1% range accuracy with a 2 to 4 PSI deadband for tight system cycling.
- Industrial Build: Utilizes phosphor bronze bellows and a gasketed diecast aluminum enclosure for long-term reliability in mechanical rooms.
- Drop-in Compatibility: Perfectly replaces J21K-254-9545 units without requiring recalibration or piping modifications.
Is the United Electric J21K-254 suitable for water systems?
Yes, the phosphor bronze wetted parts and metal bellows are compatible with water, glycol, and inert dry air systems commonly found in commercial HVAC cooling towers and chillers.
How do I adjust the pressure setpoint?
Adjustment is performed internally via a 5/16" hex head screw. Turn clockwise to raise the setpoint and counter-clockwise to lower it; always verify with a calibrated gauge during commissioning.
Can I use this for outdoor installations?
While the J21K-254 is housed in a NEMA 1 enclosure intended for indoor use, Ensure the electrical conduit is properly sealed to prevent moisture ingress into the mechanism.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The United Electric J21K-254 Pressure Switch is an essential component for demanding HVACR and industrial filtration applications, specifically designed to monitor differential pressure with high precision. This 0/90# SPDT NEMA1 Pressure Sw. features opposing metal bellows that accurately sense the pressure delta between two points, making it ideal for differential pressure switch hvac tasks such as monitoring chiller oil pressure, filter status monitoring, and verifying proof of flow in pump systems. The J21K-254 is electrically identical to the J21K-254-9545, ensuring seamless replacement in legacy installations. For contractors, the internal 5/16 hex nut allows for a field adjustable pressure switch setup across a range of 0 to 90 psid. Its rugged design includes a 1/4" NPT process connection and an SPDT snap-action switch rated at 15A, providing reliable United Electric Controls J21K series performance for compressor control and safety shutdown circuits.
Key Benefits for the Technician- High Load Capacity: Equipped with a 15A SPDT switch, handling resistive loads up to 480 VAC without external relays.
- Precise Control: Features a repeatable ±1% range accuracy with a 2 to 4 PSI deadband for tight system cycling.
- Industrial Build: Utilizes phosphor bronze bellows and a gasketed diecast aluminum enclosure for long-term reliability in mechanical rooms.
- Drop-in Compatibility: Perfectly replaces J21K-254-9545 units without requiring recalibration or piping modifications.
Is the United Electric J21K-254 suitable for water systems?
Yes, the phosphor bronze wetted parts and metal bellows are compatible with water, glycol, and inert dry air systems commonly found in commercial HVAC cooling towers and chillers.
How do I adjust the pressure setpoint?
Adjustment is performed internally via a 5/16" hex head screw. Turn clockwise to raise the setpoint and counter-clockwise to lower it; always verify with a calibrated gauge during commissioning.
Can I use this for outdoor installations?
While the J21K-254 is housed in a NEMA 1 enclosure intended for indoor use, Ensure the electrical conduit is properly sealed to prevent moisture ingress into the mechanism.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
