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20PS-2.8 SPDT Pressure Switch - 7/16-20UNF Female, 2.8MPa OFF/2.2MPa ON, 0.02-5.5MPa Adjustable for HVAC & Precision Protection

20PS-2.8 SPDT Pressure Switch - 7/16-20UNF Female, 2.8MPa OFF/2.2MPa ON, 0.02-5.5MPa Adjustable for HVAC & Precision Protection

Model: 20PS-2.8; Thread: 7/16-20UNF Female; Switch points: OFF=2.8MPa, ON=2.2MPa; 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-2.8 SPDT Pressure Switch
Brand:
SHINE
Code:
20221152


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Product Description

20PS-2.8 SPDT Pressure Switch

A high-reliability precision pressure control solution, the 20PS-2.8 integrates SPDT dual-circuit auto-commutation technology and robust structural design. Tailored for scenarios requiring accurate pressure switching and protection, it delivers stable performance for HVAC systems and industrial equipment, with flexible customization to meet diverse application demands.

Core Advantages

Advanced SPDT switch design: Enables automatic dual-circuit commutation—when pressure acts, H contact opens and L contact closes; resets seamlessly as pressure drops, adapting to complex control logic.
Superior safety & durability: Fusion-welded stainless steel pressure sensor and full air-tight connection prevent leaks, ensuring reliable operation in harsh environments.
User-friendly flexibility: Supports 3~800PSI (0.02~5.5MPa) adjustable pressure, plug-in or wire connections, and British thread quick connector/brass tube welding installation. Factory-pre-set parameters allow immediate use without on-site adjustment.

Key Specification Table

Parameter	Details
Model	20PS-2.8
Thread Interface	7/16-20UNF Female
Switch Action Points	OFF: 2.8MPa; ON: 2.2MPa
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)
Dielectric Strength	AC700V/S (contacts); AC2000V/S (terminals-housing)

Working Principle

Built with an internal reversible stainless steel diaphragm. When the diaphragm senses preset pressure, it flips to trigger contact switching—H contact opens and L contact closes simultaneously. As system pressure decreases to the recovery value, the diaphragm resets instantly, disconnecting the L contact and re-connecting the H contact 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.