14
In some beer systems the walk-in cooler or storage
room is located remotely and on different levels from
the dispensing points. Under these conditions, even
with large size beer lines it is often not feasible to
dispense beer at an adequate flow rate with normal
keg pressures since the drag, or resistance of the
lines, as well as vertical lift that may be required can
be sufficient to reduce the flow greatly at these
standard pressures. In these cases it is often
necessary to pressurize the keg as much as two or
three times the normal keg pressure in order to
provide an acceptable flow rate at the dispensing
point. This type of system is commonly known as a
“long draw” or “remote” system. Manufacturers of
these systems recommend using a blend of gasses or
beer pumps (usually a mixture of CO
2
and air or CO
2
and nitrogen) to pressurize the system without over
carbonating the beer. The refrigerated chamber
containing the kegs can be located more than 450 ft
(91.4 m) away from the serving location using these
long draw techniques.
Natural Keg Pressures at Sea Level (Pounds/
Square inch)
Add 1 psi to adjust for altitude for every 2,000 ft above sea level.
An additional 1 psi may be required for “Light” beers.
Brewing
Company
Cooler Temperature
36°F
38°F
40°F
42°F
Anheuser Busch
11
12
13
14
Adolph Coors
(requires 1/4"
Ported Shanks)
14.5
15.5
16.5
17.5
Miller
12.5
13.5
14.5
15.5
Schlitz/Stroh’s
12
13
14
15
STH13_Tech.book Page 14 Wednesday, September 15, 2010 3:20 PM