You are here: Home » Products » Pressure Switch » 20PS Pressure Switch Series » QYK-140 Pressure Switch - 7/16-20UNF Female, 0.06MPa OFF/0.18MPa ON

QYK-140 Pressure Switch - 7/16-20UNF Female, 0.06MPa OFF/0.18MPa ON

Model: QYK-140; Thread: 7/16-20UNF Female; Switch points: OFF=0.06MPa, ON=0.18MPa; Working pressure: Low-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; Adaptability: Fits diverse application requirements.

Model:
QYK-140 Pressure Switch - 7/16-20UNF
Brand:
SHINE
Code:
20221162


Availability:



Inquiry

Product Description

QYK-140 Pressure Switch

A reliable low-pressure control solution, the QYK-140 is engineered with a 7/16-20UNF female thread and precise switching performance. It balances durability, easy integration, and adaptive design to meet the pressure protection needs of HVAC systems, refrigeration equipment, and small industrial machinery.

Core Advantages

Precise low-pressure control: Triggers OFF at 0.06MPa to prevent under-pressure damage and auto-resets ON at 0.18MPa, ensuring timely system protection and stable recovery.
Easy installation & adaptability: 7/16-20UNF female thread enables secure connection to standard pipelines. The design accommodates specific application needs, with factory pre-set parameters for immediate use and the flexibility to align with custom requirements.
Durable & reliable: Sealed structural design enhances leak-proof performance and resistance to harsh conditions. Wide temperature tolerance (-30°C~+80°C) adapts to diverse working environments, ensuring long-term stable operation.

Key Specification Table

Parameter	Details
Model	QYK-140
Thread Interface	7/16-20UNF Female
Switch Action Points	OFF: 0.06MPa; ON: 0.18MPa
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
Application Adaptability	Compatible with custom scenario requirements

Working Principle

Equipped with an internal reversible stainless steel diaphragm. When system pressure drops to 0.06MPa, the diaphragm flips to disconnect the switch (OFF), avoiding under-pressure damage. As pressure rises to 0.18MPa, the diaphragm automatically resets, re-engaging the switch (ON) to restore operation. The core mechanism supports alignment with specific pressure thresholds to match unique application demands.

Application

Key Application Scenarios

HVAC & Refrigeration Systems

Ideal for household air conditioning units, small commercial refrigerators, display freezers, and mini cold storage. The 7/16-20UNF female thread fits standard low-pressure pipelines, protecting compressors from abnormal low pressure. Its ability to adapt to specific system needs makes it suitable for both residential and small business cooling setups, maintaining consistent efficiency.

Small Industrial & Precision Equipment

Suitable for low-pressure pneumatic tools, small hydraulic systems, lubrication circuits, and laboratory precision instruments. Widely used in light manufacturing, electronic assembly, and automotive maintenance. The standard thread ensures compatibility with industrial pipelines, while the adaptive design allows it to meet the unique pressure control requirements of different equipment, delivering reliable performance in limited installation spaces.