Inlet Conditions - SHURflo Brix Series Manual

MOUNTING
Depending on constraints within a facility, the type of system and concentrate characteristics, placement
of the pump is critical for each particular system installation.
The BRIX pump should be placed as close to the concentrate supply as possible, and mounted with the
fittings vertical (up). Preferred mounting is slightly above or at least the same level as the container. If a
pump must be mounted considerably higher, the amount of vertical lift is dependent upon concentrate
viscosity (see Inlet Conditions). If a pump is mounted below the concentrate, be aware that air, which
enters into the system, can return to the B-I-B, causing loss of the correct ratio. Choose a location that
allows for easy sanitization and winterizing of the BRIX pump once mounted.
The inlet water source should be plumbed with 1/2"[13mm] inside diameter (I.D.) tubing and have a shut-
off valve. The water source pressure should be regulated to a maximum of 50 psi [3.4 bar]. The SHURflo
Water Pressure Reducing Valve (P/N: 183-0XX) can be used in place of a regulator.
A double check valve with vent may be required by local city ordinances to prevent the possibility of back
flow entering the city water system. National Sanitizing Foundation (NSF) listed high-pressure braid
tubing (3/8" or 1/2" [10 or 13mm] I.D.) should be used from the regulator to the water inlet of the pump,
and from the water outlet fitting to the dispenser equipment.

INLET CONDITIONS

There are several types and sizes of Quick Connect/Disconnect (Q.C.D.) fittings/bags. The type of
Q.C.D. used is determined by the company packaging the concentrate. Concentrates which are highly
viscous and/or contain solids, may be packaged with a connection that uses a less restrictive Q.C.D. and
1/2"[13mm] I.D. tubing.
The length of tubing and vertical lift that a BRIX pump can accommodate at the concentrate inlet is
dependent on the particular characteristics of the product.
adversely affect the systems inlet side due to the increase in viscosity. A brix system should not create
over 7 inches of vacuum (in/Hg) [24 kPa] at the inlet fitting while the dispenser is open and flowing a
finished drink. Inlet vacuum that is too high can evacuate the air suspended within some concentrates
("degassing"), causing inconsistency of brix or premature operation of the vacuum shut-off (if used). If
high inlet vacuum conditions are encountered, use larger tubing I.D. although, shorter inlet line may be
necessary. When a concentrate is highly viscous and/or contains large amounts of particulates it is
advised that the inlet line be as short as possible and have a minimum amount of vertical lift.
Concentrate inlet lines must be NSF listed, clear heavy wall (1/8" [3mm] thick) vacuum tubing in either
1/2" or 3/8" [13 or 10mm] I.D. Allow enough tubing to prevent kinks and include some "extra" tubing in
case service is needed at a later date. Always install stainless steel inserted Oetiker ® clamps to all
connections to prevent vacuum leaks.
The table below gives general recommendations for concentrate INLET TUBING. Actual line I.D. and
length may vary.
CONCENTRATE
Tea
Sweet & Sour Mix
Tomato Juice
Orange Juice ¬
¬Pulp product @ 40°F [5°C]
- Affects total run adversely
VISCOSITY BRIX
2.0 Cps 5:1
50. Cps 5:1
500 Cps 3:1
4000 Cps 5:1
Also, colder concentrate temperatures
TOTAL VERTICAL
‚ LIFT FT. [M]
RUN FT. [M]
12' [3.6] 5' [1.5]
10' [3.0] 3' [1.0]
5' [1.5] 2' [0.6]
3' [1.0] 1' [0.3]
TUBING
I.D. [mm]
3/8" [10]
1/2" [13]
1/2" [13]
1/2" [13]
(Continued on next page)
5.