Dwyer CPF User Manual
Page 3
Body Size and Description
3/4˝ PVC-NPT connection
1-1/2˝ PVC-NPT connection
3˝ and 4˝ PVC-NPT connection
3/4˝ PVC-Flange connection
1-1/2˝ PVC-Flange connection
3˝ and 4˝ PVC-Flange connection
FLOWMETER
MAIN
PROCESS
LINE
BY-PASS
VALVE
FLOW
FIGURE 2: TYPICAL INSTALLATION-
VERTICAL LINE FOR LIQUID, GAS, OR VAPOR
SHUT-OFF
VALVES (2)
FIGURE 3: TYPICAL INSTALLATION-
HORIZONTAL LINE FOR LIQUID, GAS, OR VAPOR
SHUT-OFF
VALVES (2)
FLOWMETER
BY-PASS VALVE
FLOW
MAIN PROCESS LINE
Apply wrenches only on the flats or outer rims of the connection
ports. Avoid over-tightening (particularly with PVC or CPVC
models – no more than one turn after hand tight), and do not use
wrenches on other portions of the body or sight tube. When
solvent cementing in the vicinity of a meter with a
polysulfone sight tube, the tube should be removed until
the cement dries and fumes clear.
SURGE CHAMBERS & ACCUMULATORS: Flow meters are
more accurate and less likely to be damaged when the fluid flow
is smooth. If the meter must be installed on a line where
reciprocating pumps or compressors causing pulsation are
used, surge chambers or accumulators are strongly suggested
to damp the shock wave.
SIGHT TUBE ROTATION: On visual (the float disk is seen)
indication models with PLASTIC sight tubes, grasp the tube
firmly BY HAND near the body and twist until the scale faces the
desired direction. USE NO TOOLS!
On PLASTIC (PVC, CPVC) flow meters, the magnet is
encapsulated in the top of the float assembly to seal it from the
wetted system.
OPERATING LIMITS FOR SERIES PVF and CPF FLOWMETERS
Maximum Non-Shock Working Pressure, PSIG @ °F (bar @ °C)
70°F (21°C)
250 (17)
170 (11)
160 (11)
150 (10)
150 (10)
150 (10)
80°F (26°C)
255 (15)
150 (10)
150 (10)
150 (10)
150 (10)
150 (10)
100°F (37°C)
150 (10)
105 (7)
105 (7)
150 (10)
105 (7)
105 (7)
120°F (48°C)
90 (6)
65 (4)
65 (4)
65 (4)
65 (4)
65 (4)
140°F (60°C)
50 (3)
40 (2)
40 (2)
50 (3)
40 (2)
40 (2)
160°F (71°C)
N.R.
N.R.
N.R.
N.R.
N.R.
N.R.
180°F (82°C)
N.R.
N.R.
N.R.
N.R.
N.R.
N.R.
210°F (98°C)
N.R.
N.R.
N.R.
N.R.
N.R.
N.R.
Body Size and Description
3/4˝ CPVC-NPT connection
1-1/2˝ CPVC-NPT connection
3˝ and 4˝ CPVC-NPT connection
3/4˝ CPVC-Flange connection
1-1/2˝ CPVC-Flange connection
3˝ and 4˝ CPVC-Flange connection
70°F (21°C)
270 (19)
180 (12)
160 (11)
150 (10)
150 (10)
150 (10)
80°F (26°C)
270 (19)
180 (12)
160 (11)
150 (10)
150 (10)
150 (10)
100°F (37°C)
250 (17)
170 (11)
140 (10)
150 (10)
150 (10)
150 (10)
120°F (48°C)
200 (10)
145 (10)
125 (9)
135 (9)
135 (9)
135 (9)
140°F (60°C)
150 (10)
115 (8)
105 (7)
110 (8)
110 (8)
110 (8)
160°F
(71°C)
130 (9)
85 (6)
75 (5)
90 (6)
90 (6)
90 (6)
180°F (82°C)
80 (6)
50 (3)
50 (3)
70 (5)
70 (5)
70 (5)
210°F (98°C)
50 (3)
30 (2)
30 (2)
40 (2)
40 (2)
40 (2)
Note: N.R. = Not Recommended
Figure 1
Figure 2
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