Nor East Controls 30685491-001 Diaphragm

The Nor East Controls 30685491-001 Diaphragm is a precise 11-inch replacement component engineered for high-performance fluid control and pressure regulation. Identified by product code GA-33671-801, this diaphragm is built to integrate seamlessly with Type 01 Pneumatic Actuators and compatible globe control valves often found in HVACR and industrial process systems. Designed for direct-acting configurations, it maintains the necessary linear valve travel and sealing integrity required for demanding steam, water, and chemical applications. This heavy-duty assembly serves as a critical repair part for maintaining terminal equipment and large-scale chiller plant controls, ensuring that pneumatic signals are accurately converted into mechanical force for precise valve positioning. Its robust construction resists degradation from repeated cycling, making it a standard choice for technicians performing routine valve actuator maintenance in complex commercial mechanical systems.

• 11-Inch Diameter: Precision-molded for exact fitment in standard Nor East Controls 11-inch actuator housings.
• Direct Replacement: Matches OEM specifications for Part Number 30685491-001 to ensure drop-in compatibility and system uptime.
• Pneumatic Reliability: Optimized for consistent response in pneumatic control valves, reducing signal hysteresis and drift.
• Industrial Strength: Fabricated from high-tensile materials to handle the pressure drops and thermal fluctuations typical of industrial HVAC environments.

• Is this diaphragm compatible with reverse-acting actuators? This specific model is geared toward direct-acting configurations; for reverse-acting pneumatic systems, technician verification of the specific actuator series is recommended.
• Can this be used in steam applications? Yes, when paired with the correct globe valve assembly, this diaphragm is rated for the standard temperature ranges of low to medium pressure steam systems.
• What does the 11-inch specification refer to? This refers to the effective diameter of the diaphragm, which determines the actuator's output force based on the supplied air pressure.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.