D-251-6000 Johnson Controls Diaphragm

Overview

The Johnson Controls D-251-6000 is a Number 3 legacy diaphragm designed as a direct OEM replacement component for discontinued pneumatic damper actuators, specifically the D-251 and D-253 series. This single-piece, flexible sealing element is critical for maintaining proper actuator response, ensuring a leak-free seal, accurate pressure handling, and a consistent stroke within building automation and commercial HVAC control systems.

Features

• Direct OEM Replacement: Engineered by Johnson Controls to fit legacy and discontinued pneumatic actuators perfectly.
• Single-Piece Construction: Simplifies installation and reduces down-time during routine maintenance or repairs.
• Durable Material: Constructed using premium materials designed to resist wear, cracks, and loss of flexibility over time.
• Leak-Free Performance: Restores tight sealing capabilities to ensure optimal control and calibration efficiency.

Specifications

• Brand: Johnson Controls
• Part Number: D-251-6000
• Diaphragm Designation: Number 3
• Actuator Compatibility: Fits discontinued No. 3 pneumatic damper actuators (e.g., D-251, D-253 series)
• Power Source: Pneumatic
• Pack Quantity: Available as single pieces or in bulk packs depending on distributor supply

Applications

The D-251-6000 is intended for use in commercial building automation and HVAC systems. It serves as a critical maintenance and service part for facility engineers and HVAC technicians performing routine upkeep or emergency repairs to restore original operational integrity to worn or damaged pneumatic actuators.