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20PS-0.68 Pressure Switch - NPT1/8 Male, 0.68MPa OFF/0.48MPa ON (Blade)

Model: 20PS-0.68; Thread: NPT1/8 Male; Connection: Blade (plug-in); Switch points: OFF=0.68MPa, ON=0.48MPa; Working pressure: Low-medium 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:
20PS-0.68 Pressure Switch
Brand:
SHINE
Code:
20221159


Availability:



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Product Description

20PS-0.68 Pressure Switch (NPT1/8 Male, Blade Connection)

A reliable low-medium pressure control solution, the 20PS-0.68 combines NPT1/8 male thread and blade connection for seamless integration. Engineered for precise pressure switching, it’s tailored to meet the protection needs of HVAC systems, refrigeration equipment, and industrial machinery, balancing performance, convenience, and durability.

Core Advantages

Precise pressure control: Triggers OFF at 0.68MPa to prevent overpressure and auto-resets ON at 0.48MPa, ensuring timely system protection and stable recovery for low-medium pressure circuits.
Easy installation: NPT1/8 male thread (standard pipe thread) enables secure pipeline connection. Blade plug-in design allows quick electrical assembly, while factory-pre-set parameters eliminate on-site adjustment.
Durable & reliable: Sealed structural design enhances leak-proof performance, with wide temperature tolerance (-30°C~+80°C) to adapt to diverse working environments, ensuring long-term stable operation.

Key Specification Table

Parameter	Details
Model	20PS-0.68
Thread Interface	NPT1/8 Male
Connection Type	Blade (Plug-in)
Switch Action Points	OFF: 0.68MPa; ON: 0.48MPa
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 reaches 0.68MPa, the diaphragm flips to disconnect the switch (OFF), avoiding overpressure damage. As pressure drops to 0.48MPa, 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 Systems

Ideal for commercial air conditioning units, household refrigerators, commercial display freezers, and small-scale refrigeration systems. The NPT1/8 male thread fits standard pipelines, while the blade connection simplifies wiring. It protects compressors from pressure fluctuations, maintaining consistent cooling efficiency for retail stores, offices, and residential use.

Industrial Low-Medium Pressure Equipment

Suitable for low-medium pressure pneumatic tools, hydraulic systems, lubrication circuits, and industrial process pipelines. Widely used in light manufacturing, automotive maintenance, and electronic assembly lines. The standard NPT thread ensures compatibility with global industrial pipelines, and the blade connection enables quick replacement, making it a practical choice for scenarios requiring efficient pressure protection.