High-pressure float valve for NH3 and CO2
26th November 2024
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.
