Fully automatic, self-operating, high capacity bleed valve made of bronze. Completely mechanical, no outside power supply required. Opens the flow when the temperature of the surrounding air falls below +1,7°C. Compliant with NSF 61/372 standard, tested for shock and vibration resistance.
An electric heater 120V AC / 74V DC or 230V AC mounted on the valve allows for closing the valve immediately even when the ambient temperature drops below the set opening point, until the passenger carriage is heated up. Reduces time needed to get the carriage back into service.