D-251-6003 Johnson Controls Diaphragm

Overview

The Johnson Controls D-251-6003 is a Number 4 replacement rubber diaphragm designed for pneumatic actuators in commercial HVAC and building automation systems. It functions as a direct OEM component to restore proper pressure regulation, flow control, and stable operation by flexing in response to system pressure changes.

Features

• Genuine OEM component ensures precise fitment and compatibility
• Single-piece construction simplifies installation and maintenance
• Durable rubber construction designed to withstand repeated actuator cycling
• Provides a reliable, leak-free seal within the actuator housing

Specifications

• Manufacturer: Johnson Controls
• Part Number: D-251-6003
• Diaphragm Designation: Number 4 (4-inch diameter)
• Material: Rubber

Applications

• Maintenance and repair of compatible Johnson Controls pneumatic actuator assemblies
• Regulating valve or damper positioning and ensuring consistent pressure response in commercial HVAC systems