White-Rodgers F55-0088 Packing Nut

The White-Rodgers F55-0088 Packing Nut is a critical component designed for remote bulb controls and similar immersion applications. Featuring a standard 1/2 inch thread size, this hardware ensures a secure, leak-proof seal for capillary tubes and sensing bulbs where they enter the system. When dealing with fluid or gas media, maintaining a tight HVAC valve seal is non-negotiable to prevent pressure loss and environmental contamination. This industrial-grade nut is specifically engineered to replace the 104484A and M20-series packing assemblies. It allows the sensor bulb to be directly immersed in the process liquid, providing a faster response time and tighter temperature control than using a separate well. For technicians in the field, the F55-0088 is a reliable solution for routine White-Rodgers control maintenance, built from durable materials that withstand the vibrations and thermal cycling found in heavy-duty HVACR environments.

• Direct Immersion Design: Optimizes thermal transfer by allowing the remote bulb to contact the media directly without an insulating well.
• Precise 1/2" Threading: Eliminates the risk of cross-threading during packing nut installation, ensuring a precision fit on standard White-Rodgers control heads.
• Leak Prevention: High-tolerance machining provides a robust leak-proof connection for both gas and liquid applications.
• Compatibility: Direct field replacement for older White-Rodgers M20 and 104484A hardware, maintaining equipment uptime.

Is the F55-0088 compatible with corrosive fluids?
This component is intended for use in liquids and gases that are non-corrosive to brass and industrial alloys. For highly corrosive chemical profiles, always verify compatibility with the specific sensing bulb material before installation.

What is the primary function of this packing nut?
It compresses the packing material around the capillary tube or sensor stem to create a pressure-tight seal, preventing the migration of refrigerant, water, or oil while allowing the bulb to remain in the flow stream.

Can this be used with other brands of remote bulb controls?
While designed as a Replacement heating control part for White-Rodgers products, it may fit other manufacturers using 1/2" NPT-style thread patterns, provided the internal bore matches the capillary diameter.

This item is not eligible for free shipping.

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.