How many qt jars can be canned in this pressusre canner?

7 quarts jars. 10 regular mouth pints jars. I currently today have 20 pints of pork canning (i have an additional metal plate like the one that goes on the bottom ) 10 pints on the bottom and 10 on the top rack. You can not double stack quarts. This is the best canner I have owned

How many Quart and pint jars does it hold?

I would not put in more than 9 regular mouth pint jars per level, for a total of 18 jars. When you put in 10/level the jars get wedged in and there's a risk of jars cracking, based on my experience. I've been canning for 50+ years and am on my third 23-quart pressure canner just my opinion.

Can this canner be safely used on a glass-surface range? If so, what is the smallest burner on which it can be safely used?

The issue people have with using large vessels on glass top ranges is that if the vessel is larger than the burner ring, it could transfer heat past the area where the glass has been properly tempered for high heat (outside of the burner ring). This could cause a failure in the glass top surface. I would check with your range mfg as well as inly cook in a burner that is the same diameter as the vessel you're using.

how pressure is regulated

The pressure is actually regulated by a weight that sits on top of the vent pipe. The canner comes with a weight for 15 PSI, but Presto has weights for 5 & 10 PSI. You may also manually regulate the pressure by monitoring the gauge and controlling the heat under the pot.

ASIN	B0000BYCFU
Amazon Bestseller	#105,970 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #42 in Pressure Cookers
Brand	Presto
Brand Name	Presto
Capacity	21.8 Liters
Closure Type	Outer Lid
Color	Silver
Control Method	Touch
Controller Type	Hand Control
Customer Reviews	4.8 out of 5 stars 19,203 Your Review
Finish Type	Stainless Steel
Global Trade Identification Number	00075741017815, 00806293908654
Included Components	80 page instructions and recipe book, Canning / Cooking Rack
Is the item dishwasher safe?	No
Item Type Name	Presto 01781 23-Quart Pressure Container and Cooker
Item Weight	12 Pounds
Manufacturer	National Presto
Material	Aluminum
Model Number	01781
Operation Mode	Manual
Special Feature	Gas Stovetop Compatible
Special Features	Gas Stovetop Compatible
UPC	713976609015 163120762040 168141418303 798527587318 742230900186 881110008359 168141478925 788536208298 803982719119 809385669709 102930742095 705890041095 172302702163 075741017808 071160329331 132017568591 737946602899 845913215246 763616047455 763615715263 758710429696 759284472583 788536209165 702668903159 115970811171 807030499213 667562862493 809186274836 759284016145 635133305205 8721826736…
Voltage	100 Volts (AC)
Wattage	1000 W

PRESTO O1781 CANNER 23QT ALUMINIUM

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