Overview
The BT5-31GLASS sight glass provides a clear visual indicator of refrigerant condition within a compressor or A/C system. By allowing technicians to observe refrigerant flow, bubbles, or oil presence, this sight glass supports proper charging, diagnostics, and ongoing system monitoring.
Designed to meet industry-standard specifications, BT5-31GLASS is suitable for use in mobile, heavy-duty, and off-highway HVAC systems where reliable serviceability is required.
Key features
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Compressor sight glass for refrigerant inspection
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Clear viewing window for system diagnostics
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Designed for mobile and heavy-duty HVAC use
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Direct replacement for Valeo and MEI reference parts
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Supports proper A/C charging and troubleshooting
Functional details
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Allows visual confirmation of refrigerant flow
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Helps identify air, moisture, or low charge conditions
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Commonly used during installation and service procedures
Interchange / reference
BT5-31GLASS is based on and interchangeable with the following part numbers: Valeo 124-19822, MEI Corporation 50031.
Typical applications
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Mobile HVAC compressor systems
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Heavy-duty truck A/C systems
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Off-highway and industrial air conditioning
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Service and diagnostic installations
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