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UNITED ELECTRIC J21K-254 Differential Pressure Switch - Replacement HVACR Controls, Switches & Thermostats
UNITED ELECTRICReplacement HVACR Controls, Switches & Thermostats

UNITED ELECTRIC J21K-254 Differential Pressure Switch

UNITED ELECTRIC Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Differential Pressure Switch.

SKU 3G-OTH-91220

Also listed as: J21K254 · J21K 254

Brand
UNITED ELECTRIC
Item
J21K-254 Differential Pressure Switch
Category
Replacement HVACR Controls, Switches & Thermostats
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

UNITED ELECTRIC
Manufacturer Part Number
J21K-254
Product Type
Differential Pressure Switch

Technical Documents

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UNITED ELECTRIC Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

UNITED ELECTRIC Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Differential Pressure Switch.

Frequently Asked Questions

What is a UNITED ELECTRIC J21K-254 differential pressure switch used for?

The UNITED ELECTRIC J21K-254 differential pressure switch monitors pressure differences in HVACR systems, triggering alarms or controlling fans, dampers, and filters. It is commonly applied in commercial and industrial air handling, clean rooms, and process ventilation to ensure safe, efficient operation.

What are the specifications of the UNITED ELECTRIC J21K-254?

The UNITED ELECTRIC J21K-254 is a differential pressure switch with manufacturer part number J21K-254. It is designed for HVACR controls, switches, and thermostats applications. For detailed pressure range, electrical ratings, and connection sizes, consult the product datasheet or contact 3G Electric.

Where to buy a UNITED ELECTRIC J21K-254 differential pressure switch worldwide?

3G Electric supplies the UNITED ELECTRIC J21K-254 differential pressure switch worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this replacement HVACR control.

How to install a UNITED ELECTRIC J21K-254 differential pressure switch?

Install the UNITED ELECTRIC J21K-254 in a clean, dry location with the diaphragm vertical to avoid moisture trapping. Connect pressure lines to high and low ports per system schematic, and wire according to the electrical rating. Always follow manufacturer guidelines and local codes for safe operation.

Used in

Common applications for UNITED ELECTRIC
HVACR systems — UNITED ELECTRIC pressure switches like H400K-457 for refrigerant pressure monitoring and compressor protection
Industrial refrigeration — Differential pressure switch J21K-254 for detecting filter clogging in ammonia or freon systems
Boiler control — Pressure switch 10F15 for low-water cutoff or high-pressure limit in steam boilers
Compressor control — Switch 10-C11 for unloader control or pressure regulation in reciprocating compressors
Process filtration — Differential pressure switch J21K-254 for monitoring pressure drop across bag filters or cartridge housings
Pump protection — Pressure switch H100-218 for dry-run protection or pressure-based pump start/stop in water systems

UNITED ELECTRIC Products

3G Electric supplies UNITED ELECTRIC replacement hvacr controls, switches & thermostats. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Differential pressure switch for HVACR systems. Monitors pressure differences to trigger alarms or equipment shutdown when setpoints are exceeded. Commonly used in air handling units, filter monitoring, and duct static pressure control
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The UNITED ELECTRIC J21K-140 is a differential pressure switch used in HVACR systems to monitor pressure differences. It can trigger alarms or shutdowns when setpoints are exceeded. Typical applications include air handling units, filter monitoring, and duct static pressure control
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This differential pressure switch monitors pressure differences in HVACR systems. It is used for applications such as filter monitoring, duct static pressure control, and air handling unit protection. The switch triggers alarms or equipment shutdown when setpoints are exceeded
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The UNITED ELECTRIC J54-25 is a pressure switch used in HVACR systems to monitor and control pressure in refrigeration, air conditioning, and heating equipment. It triggers electrical contacts at set pressure thresholds, protecting compressors and ensuring system efficiency. Common in commercial and industrial applications
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The UNITED ELECTRIC J54-25 is a pressure switch used in HVACR systems to monitor and control pressure in refrigeration, air conditioning, and heating equipment. It triggers electrical contacts at set pressure thresholds, protecting compressors and ensuring system efficiency. Common in commercial and industrial applications
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The UNITED ELECTRIC 10F15 is a pressure switch used in HVACR and industrial systems to monitor or control pressure. It provides on/off switching at set pressure thresholds, helping protect compressors and maintain system efficiency. Suitable for refrigeration, air conditioning, and process equipment
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The UNITED ELECTRIC 10F15 is a pressure switch used in HVACR and industrial systems to monitor or control pressure. It provides on/off switching at set pressure thresholds, helping protect compressors and maintain system efficiency. Suitable for refrigeration, air conditioning, and process equipment
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The UNITED ELECTRIC H100-701 is a pressure switch designed for use in HVACR and industrial systems. It provides on/off switching at a set pressure point, suitable for monitoring or controlling pressure in refrigeration, air conditioning, and process equipment
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The UNITED ELECTRIC H100-701 is a pressure switch designed for use in HVACR and industrial systems. It provides on/off switching at a set pressure point, suitable for monitoring or controlling pressure in refrigeration, air conditioning, and process equipment
The UNITED ELECTRIC H400K-457 is a pressure switch used in HVACR and industrial systems to monitor or control pressure. It triggers an electrical contact at a set pressure point, protecting equipment or initiating processes. This replacement part is suitable for applications requiring reliable pressure sensing
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The UNITED ELECTRIC H400K-457 is a pressure switch used in HVACR and industrial systems to monitor or control pressure. It triggers an electrical contact at a set pressure point, protecting equipment or initiating processes. This replacement part is suitable for applications requiring reliable pressure sensing
The UNITED ELECTRIC H100-218 is a pressure switch used in HVACR systems to monitor and control fluid or gas pressure. It triggers an electrical contact at a set pressure point, protecting compressors, pumps, and boilers from overpressure or underpressure conditions in commercial and industrial applications
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The UNITED ELECTRIC H100-218 is a pressure switch used in HVACR systems to monitor and control fluid or gas pressure. It triggers an electrical contact at a set pressure point, protecting compressors, pumps, and boilers from overpressure or underpressure conditions in commercial and industrial applications
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The UNITED ELECTRIC H54-24 is a pressure switch designed for use in HVACR and industrial systems to monitor or control pressure. It activates or deactivates electrical circuits at a set pressure point, ensuring safe operation in refrigeration, compressors, and process equipment
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Pressure switch for HVACR systems, used to monitor and control fluid or gas pressure. Activates or deactivates electrical circuits at set pressure thresholds for safe operation in refrigeration, air conditioning, and industrial process applications