In today’s competitive cooling and refrigeration industry, system efficiency alone is not enough. OEMs and system designers are equally focused on installation simplicity, reliability, and total applied cost. AXV is Danfoss’ new mechanical pressure regulator designed to address exactly these needs. Developed for both hot gas bypass and liquid expansion applications, AXV combines performance, robustness, and simplified installation in one versatile platform.
Engineered for air driers, water chillers, ice cream machines, and frozen beverage dispensers, it provides stable operation and enhanced durability—all at a lower applied cost. Importantly, AXV is a pressure regulator — not a superheat regulator. It controls evaporator pressure and ensures stable evaporation of temperature across the entire evaporator surface. This makes it ideal for applications where constant pressure (temperature) is the primary objective.
One valve, two application areas
AXV is built as a versatile pressure-regulating valve platform with two dedicated variants.
AXV-H is developed for hot gas bypass applications. Installed between the high- and low-pressure sides, it maintains compressor suction pressure by injecting hot gas. By adapting compressor capacity to the actual evaporator load, AXV-H ensures stable evaporation pressure at varying load conditions. It is designed to replace existing TUH and TCHE hot gas bypass valves, while covering up to 20% higher capacity within the same application range.
AXV-I is developed for liquid injection based on evaporation pressure. When evaporation pressure drops, the valve opens proportionally to maintain the defined setpoint. This makes AXV-I particularly suitable for systems where constant evaporation temperature across the full evaporator is essential.
Engineered for performance and durability
AXV is designed around a robust stainless-steel platform with laser-welded double diaphragm technology and a Ø45 mm diaphragm for precise and stable regulation.
Key technical advantages include:
- No bulb and capillary tube
- Internal pressure equalization
- Low internal friction for fast response
- Reduced pressure drop to open the valve
- Mechanical spring adjustment from 1 to 7 bar (1–11 bar with R410A)
- Maximum working pressure (MWP): low and medium pressure: 34 bar / 493 psi and high pressure: 49 bar /710 psi
- Broad media temperature range from -40°C to 140°C
- Compatible with A1, A2L and A3 refrigerants (except R744 and R717)
- Compliant: cULus (UL207), CE , Gost
The result is stable control performance combined with long diaphragm lifetime — even with high-pressure refrigerants.
Simplified installation and lower complexity
Ease of installation has been a key development focus.
AXV features bi-metal connectors for fast and straightforward brazing — no wet cloth, no refrigeration pliers, and no external sensing elements required.
With fewer components and no external bulb, system complexity is reduced. This directly contributes to lower applied costs, easier mounting, and simplified service handling.
Built for long-term reliability
- AXV has undergone extensive testing including:
- MOPD testing
- Lifetime and fatigue testing
- External leakage testing
- Capacity validation
- Reliability and salt spray testing
Production is established on a dedicated European manufacturing line, ensuring consistent quality and supply security.
Expanding the Danfoss portfolio
- AXV complements the Danfoss valve portfolio by:
- AXV-H replacing TUH and TCHE hot gas bypass valves
- Offering a pressure-regulated expansion alternative
- Reducing code complexity through wide manual adjustment range
- Supporting portfolio migration by end of 2026
Designed for cost-performance balance
With broad application coverage, robust stainless-steel construction, simplified installation, and high regulating performance, AXV delivers a strong cost-to-performance ratio.
Whether used for hot gas bypass or liquid injection, AXV provides a flexible and durable solution that supports evolving system demands — while keeping applied costs under control.
For more information on AXV, click here.