The flare nut / union nut with 1/4" SAE thread and 6 mm hole size from Wigam (model NS4-4-6) is an essential connection component for refrigeration and air conditioning systems. It enables a secure and tight connection of pipework and is ideal for applications that require a reliable seal. Manufactured from high-quality materials, this union nut offers durability and resistance to corrosion. Perfect for use in professional installations, it ensures easy assembly and disassembly.

Bosch RG 4.0 A high-pressure suction unit for A2L and A3 refrigerants Product description The Bosch RG 4.0 A recovery unit is a robust and powerful refrigerant recovery unit for professional use in refrigeration and air-conditioning technology. It is suitable for extracting gaseous and liquid refrigerant from closed systems and is compatible with many common refrigerants in categories A1, A2L, A2 and A3 . Thanks to its oil-free single-cylinder compressor, the unit operates reliably, requires little maintenance and does not need regular oil changes. The high recovery rate of up to 410.5 kg/h in push-pull mode makes the Bosch RG 4.0 A particularly attractive for service calls, maintenance, repairs and recovery work on refrigeration, air-conditioning and heat pump systems. Your benefits Suitable for A2L and A3 refrigerants – ideal for modern and flammable refrigerants Can also be used with many A1 refrigerants, but not with CO₂ and NH₃ High flow rate of up to 410.5 kg/h in push-pull mode Oil-free single-cylinder compressor for low-maintenance operation Suction of liquid and gaseous refrigerants High-pressure cut-out at 38.5 bar to protect the unit and the user Low-pressure switch for automatic shut-off when the vacuum level is reached Self-cleaning function for easy refrigerant change Integrated dirt filter and filter drier included Robust industrial design for daily service use Professional evacuation unit for modern refrigerants The Bosch RG 4.0 A is particularly suitable for specialist refrigeration companies that regularly work with modern refrigerants such as A2L or A3 refrigerants. Particularly when dealing with flammable refrigerants, a suitable and certified recovery unit is essential. The unit was developed for professional workshop and field service use and is robust, stable and easy to operate. The high-performance electric fan first draws fresh air through the condenser, thereby ensuring high recovery rates even under demanding operating conditions. The easily accessible condenser unit allows for quick cleaning without the need for laborious dismantling of the housing. Technical data Manufacturer Bosch Model RG 4.0 A Equipment type Refrigerant extraction unit / recovery unit Suitable refrigerants A1 (excluding CO₂), A2L, A2, A3 – except NH₃ Mains voltage 230 V Power consumption 360 W Current consumption 5 A Engine type Single-cylinder, oil-free Number of cylinders 1 Gaseous flow rate 10.7 kg/h Flow rate (liquid) 122.1 kg/h Flow rate (push-pull) 410.5 kg/h Maximum operating pressure 38.5 bar Connection A 1/4" SAE male Connection B 1/4" SAE male Operating temperature 0 °C to 50 °C Cable length 2.5 m Dimensions 450 x 250 x 350 mm Weight 14.6 kg Features and functions Oil-free single-cylinder compressor High-pressure switch with automatic reset Low-pressure switch for automatic shut-off Self-cleaning function Integrated dirt filter Filter-drier included Protective cover for pressure gauge and controls Sturdy brackets and feet for noise and vibration damping Electrical and refrigeration connections on opposite sides Reset fuse and high-performance IEC connection Typical applications Refrigerant extraction and recovery Servicing of air-conditioning and refrigeration systems Maintenance of heat pumps Recovery prior to repair or component replacement Working with A2L and A3 refrigerants Professional after-sales service and on-site workshop support Why choose the Bosch RG 4.0 A? The Bosch RG 4.0 A is the right choice when a powerful, robust and versatile recovery unit for modern refrigerants is required. The combination of high recovery capacity, an oil-free compressor, automatic protection functions and easy maintenance makes the unit particularly well-suited for use by specialist refrigeration and air-conditioning firms.