World News

Industry news and insights from Europe and around the World

UK News

Latest news and developments in the United Kingdom

Products

Keep up-to-date with the latest new products and technology

Features

General articles, applications and industry analysis

High-pressure float valve for NH3 and CO2

GERMANY: GEA AWP has developed a new high-pressure float valve for ammonia and CO2 industrial refrigeration and cooling processes.

The HSX high-pressure float valve is entirely mechanical, requiring no electrical connection, additional cabling or control systems. 

GEA AWP insists that by operating with HSX high-pressure float valves, low condensation temperatures can be achieved without regard to the control system, especially in cold seasons.

HSX high-pressure float valves have a welded shut-off valve at the inlet and outlet, as well as a vacuum nozzle and an externally operated transport lock with manual adjustment. 

In addition, service valves for draining and discharging non-condensable gases can be installed via two G ¼in threaded connections. 

If the cooling capacity increases, the liquid level in the high-pressure float regulator rises and the refrigerant is expanded via the purely mechanical throttle opening. As a result of this expansion (pressure reduction) in the outlet, there is a liquid-vapour mixture behind the high-pressure float regulator, which is discharged to the separator. A high-pressure collection tank is generally not required. 

The continuous expansion of the refrigerant prevents pressure fluctuations and reduces the amount of flash gas, and thus reduces the power consumption of the compressor.

The HSX high-pressure float valves can also be used to optimise the energy efficiency of hot gas defrosting of evaporators. As the high-pressure float valve only allows condensed liquid to pass through to the low-pressure side, energy is prevented from being wasted by hot gas flowing unused to the low-pressure side. Compared to other defrosting methods, the high-pressure float can enable energy savings of up to 50%, GEA AWP claims.

The valves come in nominal diameter of DN 50 and DN 80 for cooling capacities up to 2,646kW. Temperature range for standard valves is -60°C to +75°C.

GEA AWP

Latest News

14th February 2025

Two convicted of R22 refrigerant smuggling

USA: Two men have been convicted for separate instances of smuggling R22 refrigerant into the USA from Mexico.
14th February 2025

REHVA and ASHRAE extend co-operation

USA: REHVA, the Federation of European Heating, Ventilation and Air Conditioning Associations, took advantage of this week’s ASHRAE winter meeting to renew its partnership with the US-based organisation.
14th February 2025

Manage Panasonic heat pumps in cascade

UK: Panasonic is launching its new Cascade Manager, Aquarea Cascade Edge, including P-Smart Edge and P-Smart Nexus. 
14th February 2025

Eurovent calls for recognition of HVACR sector

BELGIUM: The European manufacturers' group Eurovent is calling for the recognition of the HVACR sector in the EU’s Clean Industrial Deal and related policies, to preserve the industry's competitiveness.
14th February 2025

Swegon acquires American Geothermal 

SWEDEN/USA: Swegon has signed an agreement to acquire American Geothermal, a US manufacturer of heat pumps and chillers for the concrete industry and commercial HVAC sectors.
14th February 2025

China’s HFC emissions more than 20% of global total

CHINA: Figures claiming that China’s emissions of high GWP refrigerants now represent more than 20% of the global total have been described as untenable by the Environmental Investigation Agency.