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PDS Flow Valve – Information Sheet
Your machine has been equipped with the PDS flow control system. The PDS flow control system is the results of
many years of engineering effort to create a flow valve that would be accurate over a wide range of water pressures
as well maintain its volume setting for many years within the harsh water environment that coffee brewing
equipment must operate.
Depending on the model brewer, your equipment may either have the low or high flow valve, or possibly both, built
into the plumbing system of your equipment. The low flow valve is fully adjustable within the flow rate range of 0.04
GPM to 0.31 GPM while the high flow valve covers a range of 0.42 GPM to 1.38 GPM. For easy identification of the
valve in your application, the low flow valve is beige and will have a green bonnet and the high flow valve will have
a red bonnet.
Other features designed in to the valve include an internal water strainer, a non-regulated water supply side for
connecting to a independent faucet system, double "o" ring swivel fittings to eliminate leaks due to equipment being
moved [and to aid in providing quick service], and most importantly a porcelain sleeve with a piston assembly that
is self cleaning which cannot be affected by chemical within the water supply. The system has been designed to
operate over a wide range of pressures; low flow valve from 10 psi to 70 psi and high flow valve from 40 psi to 110
psi with an accuracy of 1% +/-.
The time setting of the timer, in the machine, in conjunction with the flow rate set on the PDS valve will determine
the volume of water delivered for the brew cycle. If the valve is set at a rate of 0.25 GPM and the timer is set for 2
minutes, the volume delivered will be 0.25 x 2 or 0.50 gallons (64 oz.). Refer to the table for other flow rates, timer
settings and volumes. Flow rate accuracy is critical, as the timer setting will not change.
Attention: Pressure Faucet Precaution
When this PDS valve is installed on equipment with pressurized hot water coil faucets, check to see if a back flow
preventer is incorporated in the water line. If not, it may be necessary to install a pressure relief valve. If you have
any questions please call NEWCO technical support at 1.800.556.3926.
Desired
Volume
0.175
1 liter
91
64 oz.
171
72 oz.
193
2.2 liters
199
2.5 liters
226
3 gallons
1029
20-Aug-12
Timer Setting Required To Obtain Desired Water Volume
Time Is Shown In Seconds
Flow Rate – In Gallons Per Minute
0.200
0.220
79
72
150
136
169
153
174
159
198
180
900
818
Brew Time Shown in Seconds
0.250
0.300
63
53
120
100
135
113
139
116
159
132
720
600
0.350
0.500
45
32
86
60
96
68
100
70
113
79
514
360
0.750
1.000
21
16
40
30
45
34
46
35
53
40
240
180
9
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