Caleffi Series 251 Discal High Capacity Auto Air Vent 1/2" NPT Female
High-performance automatic air vent for
solar heating systems.
Working temperature range: -20—320ºF.
Max. working pressure: 150 psi.
Max. discharge pressure: 150 psi
SolarFlex™ stainless steel piping with
EPDM insulation. Used to connect solar
collector with storage tank. Integrated
sensor cable saves time and reduces cost.
Packaged in a 50 foot continuous coil
ensures a leak-free installation.
Max. working pressure: 150 psi.
Max. fl uid temperature: 350ºF.
Min. surface temperature: -60ºF.
Min. bend radius: 5".
Flammability: Class VO.
Flame spread/smoke density: 25/50
Agency approvals: ASTM D 635
ASTM C 177
Includes fi tting kit.
Automatic air vents are used in the closed circuits of solar heating systems. They allow air contained
in the fluid to be released automatically during the filling process, through a valve operated by a float
in contact with fluid in the system.
The shut-off valves are used in combination with the automatic air vents to isolate them after filling
the circuit of solar heating systems.
.These series of products have been specially made to work at high temperatures with a glycol medium.
