BIS Certification for Service Valves for Air Conditioning & Refrigeration in India: IS 19409:2025 and the Complete ISI Licensing Process
Service valves are small components with an outsized role in every air conditioner and refrigeration system. They are the ports through which refrigerant is charged, recovered, and serviced, and through which the system is sealed against leaks for its entire working life. A poorly made service valve can leak refrigerant, fail under pressure, or make









