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Product details
Danfoss NRVH 35s Check Valve with Strong Spring | 1 3/8 in Solder
Product Description:
The Danfoss NRVH 35s (020-1034) is specifically engineered for challenging industrial applications across the UAE. Unlike the standard NRV, this NRVH model is equipped with a Stronger Spring, providing a higher opening differential pressure which is essential for preventing valve chatter in the discharge lines of compressors—especially in large Dubai chillers and district cooling units. With its 1 3/8 in (35 mm) ODF solder connections, it facilitates a high-integrity, permanent brazed joint. Rated for a maximum working pressure of 46 bar, it offers a massive Kv value of 19 $m^3/h$, ensuring high-volume refrigerant flow while protecting the system from back-condensation and vibration-induced wear in the harsh UAE climate.
Key Features & Benefits:
- Strong Spring Design: Prevents valve resonance and “chatter” in discharge lines, common in high-capacity UAE compressor racks.
- Massive Industrial Flow: Kv 19 $m^3/h$ rating supports the extreme mass flows required for large UAE cooling projects.
- Superior Compressor Protection: Effectively blocks liquid refrigerant back-flow, extending the life of expensive UAE industrial compressors.
- Permanent Hermetic Seal: 1 3/8 inch ODF solder ports ensure a leak-proof connection, vital for the high-refrigerant charges used in Dubai.
- Broad Media Range: Compatible with HCFC and non-flammable HFC refrigerants, making it a versatile choice for UAE‘s evolving energy sector.
Technical Specifications :
| Specifications | Value |
| Manufacturer | Danfoss |
| Product Model | NRVH 35s (Strong Spring) |
| Code Number | 020-1034 |
| Connection Size | 1 3/8 in (35 mm) ODF Solder |
| Max. Working Pressure | 46.0 bar (667 psig) |
| Opening Differential Pressure | 0.3 bar (Min. $\Delta p$ for NRVH) |
| Kv Value | 19.0 $m^3/h$ |
| Temperature Range | -50°C to +140°C |
FAQs:
- Q: Why should I choose the NRVH (020-1034) over a standard NRV in Dubai?
- A: Choose the NRVH for installation in the discharge line where pulsation is high; the stronger spring ensures the valve doesn’t rattle or wear prematurely in the UAE summer load.
- Q: Is the opening pressure different for this model?
- A: Yes, the NRVH requires a slightly higher differential pressure (0.3 bar) to open compared to the standard NRV (0.05 bar), providing more stability in UAE industrial systems.
- Q: Can it be used with R407C or R404A in the UAE?
- A: Yes, it is fully compatible with these HFC refrigerants commonly used in large UAE commercial installations.
