Granite Ware F0730 Instruction Manual And Users Manual page 12

8. Vent the canner (also called "exhausting" the canner). As the water boils inside the
canner, the "empty" space becomes a mixture of air and steam. The temperature of a
steam/air mixture is lower than the temperature of pure steam. Venting eliminates
("exhausts") the air so processing takes place in a pure steam environment. Process
times in recipes are intended only for a pure steam environment. Using a relatively
high heat setting, heat the pressure canner until a steady stream of steam flows freely
from the open vent pipe. Exhaust the air from the canner for 10 minutes before
reducing the heat and placing the pressure regulator on the vent pipe to start
pressurizing the canner.
9. Assemble the Pressure Regulator to the desired canning pressure as determined by the
recipe. Place the Pressure Regulator on the vent pipe and return the burner to a
relatively high heat setting. As pressure develops inside the canner, the air/vent cover
lock will lift. The air/vent cover lock is a visual indicator of pressure in the canner.
When in the up position, pressure is in the canner. When the in the down position,
there is no pressure in the canner.
Regulator alone (5 psi)
Pressurized and Locked
Cover locking pin is lifted
Regulator+1 ring (10 psi)
No Pressure and Unlocked
Cover locking pin is down
Regulator+2 rings (15 psi)
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