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QYK-110 Pressure Switch - 3/8-24UNF Male, 1.05MPa OFF/1.55MPa ON (R-134a)

Model: QYK-110; Thread: 3/8-24UNF Male; Compatible Refrigerant: R-134a; Switch points: OFF=1.05MPa, ON=1.55MPa; 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-110 Pressure Switch
Brand:
SHINE
Code:
20221161


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Product Description

QYK-110 Pressure Switch (R-134a Compatible)

A specialized pressure control solution for R-134a systems, the QYK-110 features a 3/8-24UNF male thread and precise switching performance. Engineered to meet the demands of refrigeration and HVAC equipment, it combines reliability, easy integration, and adaptive design to ensure stable pressure management in R-134a circuits.

Core Advantages

R-134a optimization: Tailored for R-134a refrigerant systems, with 1.05MPa OFF and 1.55MPa ON switching points for precise pressure control and system protection.
Easy installation & adaptation: 3/8-24UNF male thread enables secure connection to standard pipelines, ensuring seamless integration into existing systems. Factory-pre-set parameters allow immediate use, with flexible adjustment available to match specific application needs.
Durable & reliable: Sealed structural design enhances leak-proof performance and resistance to refrigerant corrosion. Wide temperature tolerance (-30°C~+80°C) adapts to diverse working environments, ensuring long-term stable operation.

Key Specification Table

Parameter	Details
Model	QYK-110
Thread Interface	3/8-24UNF Male
Compatible Refrigerant	R-134a
Switch Action Points	OFF: 1.05MPa; ON: 1.55MPa
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 1.05MPa, the diaphragm flips to disconnect the switch (OFF), preventing under-pressure damage. As pressure rises to 1.55MPa, the diaphragm automatically resets, re-engaging the switch (ON) to restore system operation—achieving seamless auto-control without manual intervention, with adaptability to custom requirements.

Application

Key Application Scenarios

HVAC & Refrigeration Medium-Pressure Systems

Ideal for commercial air conditioning units, industrial refrigeration systems, and large-scale cooling equipment. The dual switching points (2.4MPa/1.4MPa) enable multi-stage pressure protection, preventing compressor overload or underperformance. M10×1 thread fits standard pipelines, while 3-blade connection simplifies wiring, maintaining stable cooling efficiency for commercial buildings and industrial facilities.

Industrial Medium-Pressure Equipment

Suitable for hydraulic systems, medium-pressure pneumatic tools, pressure vessels, and industrial process pipelines. Widely used in manufacturing, construction machinery, and automotive production lines. Customizable parameters adapt to diverse industrial requirements, and the 3-blade connection ensures stable signal transmission. Its wide temperature adaptability allows operation in various working environments, providing reliable medium-pressure control for critical machinery.