11 May 2021
Hi-line Industries has released the latest version of its Tundra refrigeration dryers, now using refrigerant R513a in models up to and including Tundra 115 (115 cfm, 195 m3/hr capacity).
An HFC/HFO blend, R513a refrigerant has no Ozone Depletion Potential (ODP) and a much reduced CO2 impact in comparison with the previous R134a refrigerant.
The F-Gas regulation means that refrigerants with a GWP (Global Warming Potential) of more than 2500 are now subject to a ban. While R134a is below this limit and remains legal, it is sufficiently high for the regulation to stipulate an incremental phasing-down of production quotas to help reduce environmental impact. R513A is widely viewed as the optimum replacement.
R513a is an A1 safety group refrigerant and is neither toxic nor combustible. Unlike flammable refrigerants, R513a is subject to less stringent regulations in handling, maintenance intervals and compulsory leak tests, thus saving time and money.
Switching to R513a builds on the sustainable credentials of the Tundra range, which claims optimised energy efficiency via capabilities such as minimal pressure drop and lower absorbed power.
The manufacturer's integrated Direct Expansion technology delivers a constant +3°C dewpoint, unlike a chilled mass dryer, which can be as high as +10°C during its thermal cycle. Furthermore, the single-cell, all-aluminium heat exchanger module provides highly efficient heat transfer at low energy cost, while a further notable energy-saving attribute is the variable-speed fan, which only consumes the energy necessary to meet essential operational needs.
By controlling the fan speed on the refrigerant circuit there is no need for fan-pressure switches, which can become defective in dryers of this type. The fewer moving parts, the more reliable the product, making it ideal for applications that include workshop air and machine air in general manufacturing, as well as further uses in sectors that include packaging, textile, food, beverage, medical, dairy and automotive.
Hi-line’s standard Tundra range is available ex-stock at from the company’s Burton factory for next-day delivery. Six models in the series feature R513a refrigerant, with dryer selection based on factors such as maximum compressed air flow, lowest operating pressure, maximum ambient air temperature and maximum air inlet temperature.