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QYK-142 Pressure Switch - 7/16-20UNF Female, 1.37MPa OFF/1.76MPa ON

Model: QYK-142; Thread: 7/16-20UNF Female; Switch points: OFF=1.37MPa, ON=1.76MPa; Working pressure: Medium-pressure grade; Temp range: Ambient -30°C~+80°C, Medium -50°C~+120°C; Electrical rating: 125VA (24Vac), 375VA (120/240Vac); Life cycles: 30k/50k/100k optional; Burst pressure: 5000PSI.

Model:
QYK-142 Pressure Switch
Brand:
SHINE
Code:
20221164


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Product Description

QYK-142 Pressure Switch

A precise medium-pressure control solution, the QYK-142 is engineered with a 7/16-20UNF female thread and reliable switching performance. It combines robust construction, seamless integration, and stable operation to meet the pressure protection needs of HVAC systems, refrigeration equipment, and industrial machinery.

Core Advantages

Precise pressure regulation: Triggers OFF at 1.37MPa to prevent under-pressure damage and auto-resets ON at 1.76MPa, ensuring timely system protection and consistent recovery for medium-pressure circuits.
Easy installation & compatibility: 7/16-20UNF female thread (standard industrial specification) enables secure connection to standard pipelines, simplifying integration into existing systems. Factory-pre-set parameters allow immediate use without on-site adjustment.
Durable & adaptable: Sealed structural design enhances leak-proof performance and resistance to harsh working conditions. Wide temperature tolerance (-30°C~+80°C) adapts to diverse environments, ensuring long-term stable operation.

Key Specification Table

Parameter	Details
Model	QYK-142
Thread Interface	7/16-20UNF Female
Switch Action Points	OFF: 1.37MPa; ON: 1.76MPa
Operating Temperature	Ambient: -30°C~+80°C; Medium: -50°C~+120°C
Electrical Capacity	125VA (24Vac); 375VA (120/240Vac)
Service Life Cycles	30,000/50,000/100,000 times (optional)
Burst Pressure	5000PSI

Working Principle

Equipped with an internal reversible stainless steel diaphragm. When system pressure drops to 1.37MPa, the diaphragm flips to disconnect the switch (OFF), avoiding under-pressure-related failures. As pressure rises to 1.76MPa, the diaphragm automatically resets, re-engaging the switch (ON) to restore system operation—achieving seamless auto-control without manual intervention.

Application

Key Application Scenarios

HVAC & Refrigeration Medium-Pressure Systems

Ideal for commercial air conditioning units, medium-sized refrigeration systems, and cooling equipment in retail stores, offices, and industrial workshops. The 7/16-20UNF female thread fits standard medium-pressure pipelines, protecting compressors from pressure fluctuations and maintaining stable cooling efficiency for diverse commercial and industrial cooling needs.

Industrial Medium-Pressure Equipment

Suitable for medium-pressure hydraulic systems, pneumatic tools, pressure vessels, and industrial process pipelines. Widely used in light manufacturing, automotive maintenance, and mechanical processing lines. Its precise switching performance and durable sealed design ensure reliable protection for critical machinery, adapting to the rigorous demands of industrial working environments.