????NEW COURSES---- https://go.hotmart.com/Y89396417R?dp=1 ✅ With certificate ✅ WhatsApp group ✅ Satisfaction guarantee The service valves of split air conditioning systems play a fundamental role in the control and maintenance of the refrigerant flow. When used in systems that employ R-32 gas as a refrigerant, some technical specificities need to be considered, due to the particular characteristics of this gas. #### General Characteristics 1. **Construction Material**: Service valves are generally manufactured from *brass* or metal alloys with high corrosion resistance to withstand high pressures and ensure the durability of the system. The finish may include anti-corrosive coatings, such as nickel or chrome, to improve resistance in aggressive environments. 2. **Design and Typology**: They are designed with *flare* or threaded connections, allowing ease of installation and maintenance. Some versions have additional sealing plugs, equipped with sealing rings (O-rings) in synthetic rubber compatible with R-32 and synthetic oils (POE). 3. **Compatibility with R-32**: R-32 gas has a high operating pressure and a flammability index of class A2L (slightly flammable), according to safety standards (ISO 817). The valves must be designed to withstand pressures that can exceed *4.6 MPa (46 bar)* under maximum operating conditions. #### Service Valve Functions 1. **Circuit Isolation**: They allow the isolation of different segments of the refrigeration circuit during maintenance, preventing unnecessary gas leaks. 2. **Maintenance Connection**: They are equipped with access ports for pressure gauges, allowing pressure measurements during installation and diagnostics. 3. **Refrigerant Charge Control**: Facilitates the addition or removal of refrigerant gas, ensuring that the system is operating with the correct amount of R-32. #### Specific Requirements for R-32 1. **Advanced Sealing**: As a single-molecule refrigerant, R-32 has a lower tolerance to leaks. Valves must have efficient sealing to prevent emissions. 2. **Compliance with Safety Standards**: Must follow standards such as *EN 378* and flammability regulations, ensuring that they are safe in case of leaks in closed environments. 3. **Lubricating Oil Compatibility**: Must be manufactured with materials that do not react with synthetic oils (POE) used with R-32, preventing premature failures. 4. **Heat and Pressure Resistance**: Must withstand operating temperatures between -30 °C and +60 °C and maximum operating pressures. #### Maintenance and Installation During installation, it is essential to use appropriate tools, such as torque wrenches, to tighten the connections with the appropriate force, avoiding damage to the threads and ensuring sealing. During inspections, it is common to perform leak tests using dry nitrogen before introducing R-32 into the system, ensuring the integrity of the valves and the circuit. #### Conclusion The service valves of splits with R-32 are critical components, designed for high resistance, safety and compatibility with the chemical and physical properties of this modern refrigerant. Proper selection, correct installation and regular maintenance are essential for the efficient and safe operation of the system. ✅my instagram / lucianofreitas.oficial my tiktok https://bityli.com/Q4qJV ????whatsapp of my course http://wa.me/5511981336450 (text message only) [email protected]