Sight Glass
Sight Glass
We supply precision sight glasses by Danfoss, Emerson. These components enable reliable refrigerant monitoring, moisture indication, and system integrity checks for HVACR applications.
With two decades as a trusted leader in refrigeration compressors and their critical components, ascompressors.com understands that ongoing system diagnostics are vital for optimal performance and preventing costly failures. The sight glass is a simple yet indispensable diagnostic tool that provides technicians with immediate, visual feedback on the refrigerant's condition and flow within a refrigeration or AC system. As your dedicated supplier, we offer a comprehensive range of high-quality sight glasses designed for the rigorous demands of commercial and industrial cooling applications.
A sight glass is a transparent device, typically made of high-strength glass, installed in the liquid line of a refrigeration system. Its primary purpose is to allow visual inspection of the refrigerant flow. More importantly, many sight glasses incorporate a built-in moisture indicator, which changes color to signal the presence of excessive moisture in the refrigerant. This direct visual feedback is crucial for quickly identifying common system issues, such as low refrigerant charge, restricted flow, or moisture contamination, which can lead to inefficient operation, component damage, and ultimately, compressor failure.
Core Sight Glass Series and Key Products:
Our extensive inventory includes a variety of sight glasses, carefully selected for their clarity, durability, and reliable indication in demanding refrigeration environments. We focus on providing solutions that offer invaluable diagnostic capabilities:
Liquid Line Sight Glasses with Moisture Indicators: These are the most common type, installed after the filter-drier in the liquid line. They feature a color-changing indicator dot (often green for dry, yellow for wet) that reacts to the moisture content in the refrigerant. We offer these in various sizes and connection types (solder, flare) to fit different line diameters and system capacities.
Single-Port Sight Glasses: Standard design with one viewing window.
Double-Port Sight Glasses: Offering a wider viewing area for easier inspection.
Plain Sight Glasses (Without Indicator): Used where only visual flow confirmation is needed, such as in oil return lines, or in systems where moisture control is managed by other means.
Flow Indicators: Some sight glasses are designed with internal paddles or propellers that visibly spin when refrigerant flows, providing an additional indicator of positive flow, particularly useful in larger or more complex systems.
Universal Refrigerant Compatibility: Our sight glasses are designed to be compatible with a wide range of modern refrigerants, including HFCs, HFOs, and some natural refrigerants, ensuring versatility for various system types.
We ensure our sight glass offerings are constructed from robust materials that can withstand high pressures and varying temperatures common in refrigeration systems, providing clear visibility and long-term reliability.
Essential Applications and Industries for Our Sight Glasses:
The real-time diagnostic insight provided by our high-quality sight glasses is vital across a broad spectrum of commercial and industrial cooling applications:
Refrigeration System Monitoring: Essential for daily checks and routine maintenance on commercial refrigerators, freezers, ice machines, and cold storage units.
HVAC Systems: Used in central air conditioning units, chillers, and large air handling units to monitor refrigerant flow and moisture levels, optimizing performance and preventing breakdowns.
New System Start-ups & Commissioning: Crucial during initial system charging to verify proper refrigerant fill and ensure moisture is adequately removed by the vacuum and filter-drier.
Troubleshooting & Diagnostics: An invaluable tool for technicians to quickly diagnose common issues such as low refrigerant charge (evidenced by bubbles or flashing refrigerant), restricted flow, or the presence of moisture (indicated by color change).
Preventive Maintenance: Allowing proactive identification of issues before they escalate into major compressor failures or system inefficiencies.
Industrial Process Cooling: Monitoring larger chiller systems, cooling towers, and specialized industrial refrigeration setups to ensure continuous, efficient operation.
Innovation, Reliability, and Unrivaled Expertise:
At ascompressors.com, our 20 years in the refrigeration field have taught us that timely and accurate diagnosis is key to maximizing system lifespan and efficiency. The sight glass is a simple, cost-effective tool that provides critical insights into your system's health, protecting your valuable compressors and other components from unseen threats like moisture and contaminants. By choosing our high-quality sight glasses, you're investing in improved diagnostic capabilities, reduced downtime, and enhanced overall reliability for your refrigeration or HVAC equipment. Our technical team possesses the deep knowledge required to assist you in understanding their importance and selecting the right type for your application. Trust us to provide the tools for clear insight into your cooling solutions.
Why Shop for Compressors at "A&S Aerodynamic"
Here at A&S Aerodynamic, we offer a wide range of refrigeration compressors from various brands and models. Our products are sourced from reputable brands in the industry, so you can be sure they’re made to fit OE specifications.
1. Before shipping, we will send you photos of the actual product for your confirmation ( eg. nameplate, appearance, and report).
2. The product comes with a 1-year manufacturer warranty policy and 3-year in-house warranty.
3. If the product is damaged during transportation or cannot be repaired due to non-human-caused within 1 year, no return, we will directly refund or resend the new product.
4. For select items, we will include a repair kit ( Special Needs Customer Service ).
5. Enjoy a worry-free experience throughout the entire process. Feel free to request quotes and place orders with confidence, we will provide 5-star service until you are satisfied.
6. Shipping and Taxes: See Quotation.
Need your compressors as soon as possible? Don’t worry; our warehouses are strategically located across the country to ensure fast, efficient shipping. Our primary strength lies in supply capability. Whether it's OEM manufacturing or global inventory searches—from components to complete units—we can match your needs with the nearest partner's inventory for rapid delivery. Our global alliance enables transactions at wholesale agency rates. Welcome aboard! Cheers!!
Sight Glass Buyer's Guide
The Nameplate is Key: The model number alone is sometimes insufficient. We request a clear photo of the manufacturer’s metal nameplate. This confirms the specific Series, Voltage, and Bill of Material (BOM) number.
Refrigerant Verification: You must confirm the gas type (e.g., R134a, R404A, R290, or R410A). Using the wrong refrigerant in a Sight Glass compressor designed for a different gas will lead to immediate failure and void the warranty.
Voltage & Frequency Check: Global power grids vary. Whether you need 115V/60Hz (USA), 220V/50Hz (Europe/Asia), or 3-Phase 380V, this must be explicitly confirmed during the inquiry stage to prevent electrical burnout.
Application Matching: We verify if your application requires LBP (Low Back Pressure for freezers), MBP (Medium), or HBP (High Back Pressure for A/C and chillers). Installing an LBP compressor in an HBP application will cause the motor to overheat.
Performance Benchmarking: Before shipment, units undergo rigorous testing for volumetric efficiency, motor amperage draw, and noise levels
The Test Report: For peace of mind, we can provide a Quality Inspection Report or a video of the Sight Glass compressor under load test, proving it holds pressure and operates within factory specifications before it leaves our facility.
Spot Buy (Ready Stock): For urgent repairs, we leverage our global inventory of popular brands (Tecumseh, Copeland, Danfoss) to offer "2nd-Day Dispatch" on common Sight Glass models.
Batch Production (OEM Orders): For distributors or appliance manufacturers requiring 50+ units, we schedule a production run. This typically requires a 2-4 week lead time but offers significant cost savings.
Condition Clarity: We clearly distinguish between "Factory New" (fresh production) and "New Surplus" (older stock). We allow you to choose based on your budget and warranty requirements.
Robust Crating: We do not use standard cardboard for international freight. All compressors are bolted to a pallet and sealed in fumigated wooden crates compliant with ISPM 15 standards for global entry.
Upright Transport: Compressors must remain upright to prevent oil from entering the compression chamber (which causes "liquid slugging"). Our packaging includes "This Side Up" shock sensors and indicators.
Customs & Documentation: We handle the complex paperwork, including Commercial Invoices and Certificates of Origin, ensuring your goods clear customs smoothly whether shipping via DHL Air Express or Sea Freight to any port in the world.
Request a Custom Quote
To get a customized quote, please provide the following information:
1. Machine Model
2. Item Parameters
3. Part Number
4. Photos
5. Quantity
6. Working Conditions
7. Any Other Requirements
Please email your complete request to us or Chat Online, and we will respond with a quote as soon as possible.
