Winco Valves Private Limited manufactures Durable Self-Cleaning Air Release Valve. Winco Valves Private Limited is an ISO 9001 certified company offering a wide range of fire fighting equipment and safety appliances. The Durable Self-Cleaning Air Release Valve is available in a patented float design and a mechanism of a rolling seal that finds application in extinguishing fire. The Durable Self-Cleaning Air Release Valve is light in weight for easy cleaning and transportation.