Rivoira Refrigerants s.r.l.

Rivoira Criolube  a range of polyoil ester (POE) based synthetic lubricants, has been specially formulated for use in refrigeration and air-conditioning systems in combination with all types of HFC refrigerant fluid (R-134a, R-507, R-404A, R-407C, R-410A) including drop-in mixtures for HCFC R-22, such as Dupont^® Isceon^TM MO29 (R-422D) and the like.

The lubricants in the Criolube range are suitable for all types of compressor (piston, scroll, screw compressors, etc.) and ensure high protection against wear to all steel and aluminium surfaces and components, thereby contributing to prolonging the service life of the equipment.

Latest generation systems include newly developed compressor technologies and systems designed to take up less space while offering improved performances and higher energy efficiency; however, they work at higher temperatures.

The products in the Criolube line-up have been developed with the aim to meet the widest variety of technological requirements, by offering the most complete and most versatile range of lubricants currently available on the market.

Moreover, they ensure excellent oil/refrigerant solubility, optimal viscosity and chemical/thermal stability characteristics, enabling them to be used over a wide interval of pressures/temperatures.

When it comes to air conditioning and refrigeration, Rivoira Refrigerants is tasked with continuing a strategic shift from traditional products to those that increase productivity while actually lowering environmental impact. With an enviable domestic track record, Rivoira Refrigerants is building on its success by setting its sights on key markets abroad.

Rivoira Refrigerants supplies a wide range of refrigerants:

HFC refrigerant fluids

The 2037/2000 European Regulation adopted on 1 January 2010, as amended by the 1005/2009 European Regulation, prohibits the sale and the use for maintenance purposes of HCFC refrigerant fluids, due to their non-negligible impact on stratospheric ozone. Among the HCFCs, R-22 is the gas used most widely and still present in a many of the air-conditioning and refrigeration systems installed up until recently. Conversely, the latest systems have been designed to use HFCs (hydrofluorocarbons such as R-134A, R-404A, R-410A, etc.), having no impact on the ozone layer.

Rivoira offers a wide range of HFC gas, including our  StarCold™ line, and DuPont™ products ISCEON™  and Suva®.

HFO - New refrigerant gases with extremely low greenhouse effect

Refrigerant fluids HFO-1234yf and HFO-1234ze are characterised by a very low global warming potential (GWP), in keeping with  Kyoto protocol provisions.

HFO-1234yf has already been chosen by major car makers to replace R-134a in climate control units.

HFO-1234ze has been proposed as a non-flammable aerosol propellant and expanding agent (foams) but its physical characteristics make it suitable for use as a refrigerant gas for applications at positive temperatures in any situation where non-flammability is a top-priority requirement.

FREECOLD LINE

With its FreeCold Line, Rivoira supplies StarCold^TM refillable cylinders for refrigerant gases, in compliance with the European Directive that prohibits the use of non-returnable cylinders for greenhouse effect gases. Furthermore, these containers are lighter and easier to handle than traditional models.

FreeCold cylinders feature a compact design and are safe and easy to use. 

In addition to main refrigernat gases, Rivoira provides a series of other products, such as:

ETHYLEN GLYCOL AND PROPYLENE GLICOL

Heat transfer fluids are used in large refrigeration plants, when the goal is to reduce the refrigerant fluid used in the plant, or when using potentially hazardous gases (ammonia, hydrocarbons, etc.) and, for safety reasons, the circuit containing the refrigerant gas must be kept apart from public areas. Corrosion inhibitors are added to the glycol to prevent the corrosion of any metals that the glycol solution touches.

Common glycol formulas are:

• Ethylene glycol: is the most economical fluid, used primarily in heat-exchange applications.
• Propylene glycol: less toxic than ethylene glycol, it is recommended for alimentary uses.

Product is available in two types and sizes of packaging: 220 / 230 kg non-returnable kegs. and 1000 kg non-returnable cubes.

For cooling applications, Rivoira Refrigerants has three different types of glycol:

• Inhibited ethylene glycol
• Inhibited propylene glycol
• Dowcal N: inhibited propylene glycol using inhibitors certifi ed for alimentary use.

In recent years, the use of hydrocarbons as refrigerant gases has seen some growth based on the Kyoto Protocol recommendations concerning the use of fluids with low or nil greenhouse effect.

HYDROCARBON REFRIGERANTS

Hydrocarbons are highly flammable gases which, for safety reasons, are mostly used in systems requiring small gas charges. Cooling systems with high gas charges may be constructed, provided that a confined refrigeration station is used mated to a thermal transfer fluid.

The hydrocarbons used most widely in refrigeration applications are:

• R-600a (Isobutane for refrigeration) Is used primarily in household refrigerators.
• R-290 (Propane for refrigeration) Is used in small store refrigerators, normally working at positive temperatures, and in a few industrial systems requiring negative temperatures.

 SOLVOSTAR

SolvoStar” is an azeotropic mixture of pentafluoropropane and dichloroethylene, pressurised with nitrogen.

 It is the ideal fluid used to clean refrigeration and air-conditioning system.

Cleaning the cooling circuit is essential to ensure flawless operation of refrigeration systems and A/C circuits. In particular, it is important to use a cleaning agent when a compressor motor burns out, or the retrofi tting of the system calls for the complete elimination of the old lubricant or oil, or when, during scheduled maintenance, we want to remove metal, sludge, or acid oil particles from the circuit.

SolvoStar does not harm the ozone layer and therefore is suitable to replace R-141b and has many important benefits.

Rivoira produces, markets and distributes:

• atmospheric gases: oxygen, nitrogen, argon and rare gases;

• industrial, process and specialty gases: acetylene, carbon dioxide, helium, hydrogen, process gases for semiconductors, etc.;

• gases for the food industry.

Rivoira also supplies services, materials, devices and plants to a wide range of gas users, from major industrial companies to small laboratories.

The Rivoira range of refrigerant fluids includes other “fluorine-free” gases and several cleaning products for cooling systems.

The main fluorine-free gases supplied by Rivoira refrigerants are:

•  Anhydrous ammonia (NH₃);

•  Carbon dioxide (CO₂);

•  Nitrogen.