Ruskin FL 165A Fusible Link 318423 701 The Armstrong International A9330 Diaphragm The Armstrong International A9330 Diaphragm and Washer is a critical replacement component engineered specifically for high performance fluid control systems The system pressure must drop approximately 40 PSIG below the cutout setpoint before the manual reset button can be successfully engaged to close the circuit Key Benefits for Technicians: Standardized Thermal Trigger: Precise 165°F (74°C) activation makes it the industry standard for ordinary temperature classifications in standard HVAC environments or excessive dust buildup that could impair thermal transfer