Overview: This document provides technical specifications and applications for Danfoss SG+ sight glasses, which are part of the Danfoss line components program for refrigeration systems. These components are designed to monitor refrigerant conditions and are optimized for tough environments.

Specifications: The SG+ sight glasses are available in various versions with different connection types, including flare and solder connections. They are designed for high working pressures up to 46 bar (667 psi) and a temperature range of -50 to 80°C (-58 to 176°F). The sight glasses are suitable for HFC and HCFC refrigerants, including R410A.

Applications: SG+ sight glasses are used in traditional refrigeration, heat pump systems, air conditioning units, liquid coolers, and transport refrigeration. They are installed in the liquid line between the filter drier and the expansion valve to monitor refrigerant conditions.

Features: The sight glasses feature hermetic tight stainless steel-glass joining technology and a moisture indicator that changes color based on moisture content. The indicator shows green for dry conditions and yellow for wet conditions. The design allows for quick installation and reduced assembly costs.

Moisture Content Indicators: The document provides detailed tables indicating moisture content levels (in ppm) for various refrigerants at different temperatures (25°C and 43°C). The color change in the indicator reflects the moisture content, helping to determine when to change the filter drier.

Ordering Information: The document includes a comprehensive list of product codes, connection types, and sizes for different SG+ models. It notes that certain code numbers are typically in stock for quicker delivery.

Conclusion: Danfoss SG+ sight glasses offer reliable monitoring of refrigerant conditions with minimal temperature dependency, making them a critical component in maintaining the efficiency and safety of refrigeration systems.