As a NEMA 1 actuator

Industrial Durability: Engineered with Class B insulation to handle high ambient temperatures during peak summer cycles

It utilizes a 1/4" NPT bottom mount connection

essential for maintaining stable head pressure in commercial refrigeration and HVAC systems

maintaining consistent airflow through high-demand periods

York S1-025-50188-000 Pressure Switch 328140-751 As a NEMA 1 actuatorThe York S1 025 50188 000 is an OEM high pressure switch engineered for critical system protection in residential and commercial HVAC equipment. Traditionally found in R 410A systems, this normally closed switch monitors head pressure to prevent compressor damage and mechanical failure. It features a factory calibrated 650 PSI cut out threshold, which opens the electrical circuit when internal pressures exceed safe limits, and a 450 PSI cut in reset