![020B1019 - Check valve, NRV 19s, Max. Working Pressure [bar]: 49.0 Danfoss](https://haste-uae.com/wp-content/uploads/2026/02/Untitled-design-16.png)
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Product details
Danfoss NRV 19s Check Valve | 3/4 in ODF Solder | 49 bar
Product Description: Long :
The Danfoss NRV 19s (020B1019) is a critical safety and efficiency component for refrigeration plants across the UAE. This valve is specifically engineered to prevent the back-condensation of refrigerant from warm to cold system parts, ensuring optimal performance during the extreme temperature fluctuations in Dubai. Featuring a 3/4 in ODF solder connection, it provides a permanent, leak-proof joint suitable for heavy-duty piping. Its high maximum working pressure of 49 bar (711 psig) makes it fully compatible with modern high-pressure refrigerants like R410A and R32. Built with a robust internal design, it offers low pressure drop and quiet operation, making it ideal for liquid, suction, and hot gas lines in Middle Eastern cooling infrastructure.
Key Features & Benefits:
- One-Way Flow Security: Effectively prevents refrigerant back-flow, protecting compressors and maintaining system balance in UAE units.
- Extreme Pressure Durability: 49-bar rating provides a superior safety margin for high-pressure HVAC/R applications in Dubai.
- Hermetic Solder Connection: 3/4 inch ODF connectors ensure a permanent brazed seal, essential for high-vibration UAE industrial environments.
- Resonant-Free Design: Built to provide stable operation and prevent pulsation noise in commercial cooling systems across the UAE.
- Broad Media Compatibility: Suitable for all common non-flammable HFC and HCFC refrigerants used in the UAE market.
Technical Specifications :
| Specifications | Value |
| Manufacturer | Danfoss |
| Product Model | NRV 19s |
| Code Number | 020B1019 |
| Connection Size | 3/4 in (19 mm) ODF Solder |
| Max. Working Pressure | 49.0 bar (711 psig) |
| Opening Differential Pressure | 0.05 bar (Min. $\Delta p$) |
| Temperature Range | -50°C to +140°C |
| Cv Value | 5.8 gal/min |
FAQs:
- Q: Why is the NRV 19s (020B1019) used in UAE liquid lines?
- A: It is used to prevent the back-flow of liquid refrigerant into the evaporator during the off-cycle, which is crucial for compressor longevity in the UAE.
- Q: Can this valve handle high-temperature discharge gas in Dubai?
- A: Yes, it is rated for media temperatures up to +140°C, making it suitable for hot gas bypass and discharge lines in the UAE.
- Q: Is the 49-bar rating necessary for Abu Dhabi projects?
- A: For modern systems using R410A or R32, the 49-bar rating ensures full compliance with high-pressure safety standards in the UAE.
