Description
Johnson Controls D-251-6002 Diaphragm Overview
The Johnson Controls D-251-6002 is a Number 2 single-piece replacement diaphragm designed for use with compatible Johnson Controls pneumatic actuators. This OEM-quality diaphragm helps restore proper actuator function, ensuring consistent and reliable operation in HVAC control applications. Sourcing a genuine replacement diaphragm is essential for maintaining the performance and service life of your pneumatic actuator assembly.
Key Features
- OEM replacement diaphragm for Johnson Controls pneumatic actuators
- Number 2 diaphragm designation for precise compatibility
- Single-piece construction for straightforward installation
- Designed to restore proper actuator stroke and sealing performance
- Manufactured to Johnson Controls quality standards
Applications
- Replacement part for Johnson Controls pneumatic actuator assemblies
- Commercial HVAC control systems utilizing pneumatic actuation
- Building automation and controls maintenance
Important Notes
Always verify actuator model compatibility before installation. Refer to the Johnson Controls product documentation or contact your distributor to confirm this diaphragm is the correct replacement for your specific actuator model.







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