Dwyer CPF User Manual

FEMALE NPT

FLANGE VERSION

A1

A

NPT

F
E

B

HEX
CONNEC­TION

2-1/2

[63.5]

5-23/32

[145.26]

G

REMOVAL CLEARANCE

NPT

C

D

ØK

ØL

IN

OUT

J

I

5-23/32

[145.26]

2-1/2

[63.5]

H

NPT

HEX
CONNECTION

A1

B

E

F

FEMALE NPT

C

REMOVAL CLEARANCE

NPT

C

D

OUT

IN

J

I

H

ØL

ØK

FLANGE VERSION

A

Range
00/10
29/40
11/17
41/51
18/22
52/56
23/28
57/62

CPF

NPT

3/4˝

1-1/2˝

3˝

4˝

A
11-1/32
[280.19]
16-15/16
[430.21]
24-11/32
[618.27]
26-43/64
[728.20]

B
3-25/64
[86.12]
4-1/4
[107.95]
7-29/32
[200.66]
9-13/16
[248.66]

C
2-53/64
[71.83]
4
[101.6]
7-29/32
[200.66]
9-13/16
[248.66]

Series PVF and CPF Industrial Body PVC and CPVC Flowmeters

Specifications - Installation and Operating Instructions

D
4-43/64
[118.67]
6-29/64
[163.91]
11-19/32
[294.63]
14-9/32
[362.96]

E
3-39/64
[91.68]
5-1/32
[127.79]
5-1/32
[127.79]
5-7/16
[138.17]

F
2-35/64
[64.69]
3-29/64
[87.71]
4-5/16
[109.22]
5-7/16
[138.17]

G
3
[76.2]
5
[127]
5
[127]
5
[127]

Option

F1

F2

F3

F4

Range
00/10
29/40
11/17
41/51
18/22
52/56
23/28
57/62

Flange

3/4˝

1-1/2˝

3˝

4˝

H
12-1/4
[311.65]
18-5/8
[473.19]
22-35/64
[572.64]
26-3/8
[669.86]

I
4-5/8
[117.6]
5-15/16
[151.13]
6-7/64
[155.18]
7-1/2
[190.5]

J
4-1/16
[103.38]
5-11/16
[144.78]
6-7/64
[155.18]
7-1/2
[190.5]

K
2-3/4
[69.85]
3-7/8
[98.55]
6
[152.4]
7-1/2
[190.5]

L
3-7/8
[98.55]
5
[127]
7-1/2
[190.5]
9
[228.6]

# of Bolt
Holes

4

4

4

8

Bulletin F-23

Flange Opening
Diameter

(1-1/8˝)

(2˝)

(3-1/2˝)

(4-1/2˝)

A
11-1/32
[280.19]
16-15/16
[430.21]
24-11/32
[618.27]
26-43/64
[728.20]

Standard (NPT)

B
3-25/64
[86.12]
4-1/4
[107.95]
7-29/32
[200.66]
9-13/16
[248.66]

C
2-53/64
[71.83]
4
[101.6]
7-29/32
[200.66]
9-13/16
[248.66]

D
4-43/64
[118.67]
6-29/64
[163.91]
11-19/32
[294.63]
14-9/32
[362.96]

E
3-39/64
[91.68]
5-1/32
[127.79]
5-1/32
[127.79]
5-7/16
[138.17]

G

F
2-35/64
[64.69]
3-29/64
[87.71]
4-5/16
[109.22]
5-7/16
[138.17]

3
[76.2]
5
[127]
5
[127]
5
[127]

Flange

3/4˝

1-1/2˝

3˝

4˝

H
12-1/4
[311.65]
18-5/8
[473.19]
22-35/64
[572.64]
26-3/8
[669.86]

Range

Option

00/10

F1

29/40
11/17

F2

41/51
18/22

F3

52/56
23/28

F4

57/62

Phone: [phone] www.dwyer-inst.com

Optional Flange

I
4-5/8
[117.6]
5-15/16
[151.13]
6-7/64
[155.18]
7-1/2
[190.5]

J
4-1/16
[103.38]
5-11/16
[144.78]
6-7/64
[155.18]
7-1/2
[190.5]

K
2-3/4
[69.85]
3-7/8
[98.55]
6
[152.4]
7-1/2
[190.5]

L
3-7/8
[98.55]
5
[127]
7-1/2
[190.5]
9
[228.6]

# of Bolt
Holes

4

4

4

8

Range
00/10
29/40
11/17
41/51
18/22
52/56
23/28
57/62

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]

PVF

NPT

3/4˝

1-1/2˝

3˝

4˝

Flange Opening
Diameter

(1-1/8˝)

(2˝)

(3-1/2˝)

(4-1/2˝)

The Series PVF and CPF Flowmeters are heavy bodied meters
for corrosives and high purity fluids. They are economically priced
meters ideal for acids or de-ionized water, making them suited for
water & wastewater treatment facilities. The flowmeters are com­prised of all plastic wetted components for maximum corrosion re­sistance. They have a full-scale accuracy of ±2% and can be
disassembled quickly without the meter being removed from the
pipeline for easy cleaning. The Series CPF flowmeters are avail­able with standard 3/4˝, 1-1/2˝, 3˝ and 4˝ female NPT. Optional
flange connections also available.

SAFETY PRECAUTIONS

Personnel safety should be considered before pressurizing and
operating the system. There are numerous possibilities for error
in system operation and maintenance as well as component
installation. Because human eyes must necessarily come into
close proximity with the flowmeter to read it, it is recommended
that safety shielding be used with the meter along with safety
glasses. Another protective measure is to use a sheet of
transparent, high-impact material in a broad area in front of the
meter. If hazardous, toxic, or flammable fluids are being
metered, recommended safeguards should include methods to
protect personnel from splash or rebound. A method of quick,
safe removal of dangerous fluids should also be included.

SPECIFICATIONS
Service: Compatible gases or liquids.
Wetted Materials: Series PVF: PVC, fluoroelastomer O-rings;

Series CPF: CPVC, fluoroelastomer O-rings.

Temperature Limits: See operating limits (Next page).
Pressure Limits: See operating limits (Next page).
Accuracy: ±2% of full scale.
Repeatability: ±1/2% of indicated flow rate.
Process Connections: 3/4˝, 1-1/2˝, 3˝ and 4˝ female NPT with

optional flange connection available.
Weight: 3 lbs (1.4 kg) for 3/4˝, 9 lbs (4.1 kg) for 1-1/2˝, 14 lbs
(6.4 kg) for 3˝, and 18 lbs (8.2) for 4˝.

RECOMMENDED PIPING: Series PVF and CPF flowmeters
generally have no special straight run or other piping
requirements. Inlet piping should be the same size as the meter
connection. Some effect on meter accuracy may occur at high
flow velocities if inlet piping guidelines are violated. Please refer
to the table below. When installing on different size pipe, use
standard pipe adapters and come into the meter inlet with a
nipple 8 diameters long of the same size for greatest accuracy.

INSTALLATION

PREPARATION: Series PVF and CPF flowmeters are ready to
install as-is, although the sight tube may need repositioning so
the scale is visible after installation. First, remove the protective
caps from the connection ports. ALSO, REMOVE THE PLASTIC
SHIPPING TUBING ABOVE THE INLET CAP IN THE METER
CORE TUBE! Check that the float moves freely within the core

tube, and that no packing materials are in the meter.
Control valves should be mounted on the outlet side of the
meter. The use of a three valve manifold around the meter is
suggested (per Figures 2 & 3) as it allows uninterrupted process
flow while the meter is being cleaned.

MAXIMUM FLOWS (WITHOUT EFFECTING ACCURACY)
FOR UNDERSIZED PIPES CONNECTED DIRECTLY TO FLOWMETER INLETS

PIPE NPS

1/4
3/8
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
3
4
6

* Data per Cameron Hydraulic Data. Based on 5 FPS max. liquid velocity having no effect on Series
PVF and CPF flowmeters accuracy if the inlet pipe is smaller than the meter connections.
† SCFM = 0.445 x (psig + 14.7) x (ID)2. Based on 20 FPS max. air velocity having no effect on Series
PVF and CPF flowmeters accuracy if the inlet pipe is smaller than the meter connections.

DATA

2

(ID)

0.132

0.243

0.387

0.679

1.100

1.904

2.592

4.272

6.096

9.413

16.209

36.784

MAX. *
GPM LIQ.

1.72

2.98

4.74

8.31

13.47

23.32

31.74

52.29

74.56

115.2

198.4

450.0

MAX. SCFM AIR @ †
ATMOS

0.864

1.59

2.53

4.44

7.20

12.5

17.0

28.0

39.9

61.6
106
241

50 PSIG

3.80

7.00

11.1

19.5

31.7

58.8

74.6
123
176
271
467
1059

100 PSIG

6.74

12.4

19.8

34.7

56.1

97.2
132
218
311
480
827
1878

200 PSIG

12.6

23.2

37.2

64.9
105
182
248
408
582
804
1549
3514

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

OPERATING LIMITS FOR SERIES PVF and CPF FLOWMETERS

Maximum Non-Shock Working Pressure, PSIG @ °F (bar @ °C)

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

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

Note: N.R. = Not Recommended

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)

Figure 1

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.

Figure 2

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.