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20PS-2.7 SPDT Pressure Switch - 2.7MPa OFF/2.0MPa ON, 7/16-20UNF

Model: 20PS-2.7; Thread: 7/16-20UNF Female; Switch points: OFF=2.7MPa, ON=2.0MPa; Working pressure: 3~800PSI (0.02~5.5MPa); Burst pressure: 5000PSI; 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; Switch type: SPDT (dual-circuit auto-commutation).

Model:
20PS-2.7 SPDT Pressure Switch
Brand:
SHINE
Code:
20221154


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Product Description

20PS-2.7 SPDT Pressure Switch

A compact, high-precision pressure control solution, the 20PS-2.7 integrates SPDT dual-circuit auto-commutation and robust construction. Tailored for reliable pressure switching, it delivers consistent performance for HVAC systems and industrial equipment, with user-friendly features for seamless integration.

Core Advantages

Precision switching: Triggers OFF at 2.7MPa and auto-resets ON at 2.0MPa, ensuring timely pressure protection and recovery for critical systems.
Durable & safe: Fusion-welded stainless steel pressure sensor and full air-tight connection prevent leaks, enhancing reliability in harsh environments.
Flexible configuration: Supports 0.02-5.5MPa adjustable pressure, plug-in/wire connections, and British thread quick connector/brass tube welding installation. Factory pre-setting enables immediate use.

Key Specification Table

Parameter	Details
Model	20PS-2.7
Thread Interface	7/16-20UNF Female
Switch Action Points	OFF: 2.7MPa; ON: 2.0MPa
Working Pressure Range	3~800PSI (0.02~5.5MPa)
Burst Pressure	5000PSI
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)

Working Principle

Built with an internal reversible stainless steel diaphragm. When sensing 2.7MPa, the diaphragm flips to switch contacts—H contact opens and L contact closes simultaneously. As system pressure drops to 2.0MPa, the diaphragm resets instantly, disconnecting L and re-connecting H automatically, achieving seamless dual-circuit commutation without manual intervention.

Application

Key Application Scenarios

HVAC & Refrigeration Systems

Ideal for commercial, industrial, and high-performance household air conditioning refrigeration systems. Provides precise high-low pressure protection to prevent compressor overload, pipeline rupture, or refrigerant leakage caused by pressure fluctuations. Its dual-circuit commutation adapts to the control needs of modern cooling equipment, ensuring stable and efficient operation.

Precision Industrial Equipment

Suitable for precision pressure control systems, hydraulic/pneumatic tools, pressure vessels, and laboratory instruments. Serves as reliable high-low pressure protection for industrial machinery in manufacturing, automotive, and aerospace fields. Withstands extreme temperature ranges and offers customizable pressure settings, making it versatile for scenarios requiring accurate, repeatable pressure switching and long-term operational reliability.