Balcrank CF10 User manual

1
A. 11/16 SB 1145
2016_11_4-8:10
CF15
CF10
CF30
CF10 CF15 CF30
Ratio 1:1 1:1 1:1
Maximum free flow 10 gal/min (38 l/min) 13.21 gal/min (50 l/min) 22.7 gal/min (100 l/min)
Delivery per stroke 2.37 oz (0,07 l) 3.38 oz (0,1 l) 32 oz (0,25 l)
Air pressure operating
range
43.51 to 100 psi (3 a 7 bar) 43.5 psi - 100 psi (3 a 7 bar) 43.5 psi - 100 psi (3 a 7 bar)
Solid in suspension max
size
0.12 in (3 mm) 0.12 in (3 mm) 0.16 in (4 mm)
Maximum suction head 13.2 ft (4 m) dry
26.25 ft (8 m) wet
19.69 ft (6 m) dry
26.25 ft (8 m) wet
14.76 ft (4,5 m) dry
22.97 ft (7 m) wet
Weight 4.85 lb (2, 2 kg) 7.72 lb (3,5 kg) metallic
6.17 lb (2,8 kg) plastic
15.87 lb (7,2 kg) metallic
14.33 lb (6,5 kg) plastic
Fluid inlet (single inlet) 1/2" NPT (F) 1/2” NPT (F) and fl ange
1/2” BSP (F) and fl ange-DEF
1” NPT (F) and fl ange
1” BSP (F) and fl ange-DEF
Fluid inlet (double inlet) 2 x 3/8" NPT (F) 2 x 3/8" NPT (F) _
Fluid outlet 1/2" NPT (F) 1/2” NPT (F) and fl ange
1/2” BSP (F) and fl ange-DEF
1” NPT (F) and fl ange
1” BSP (F) and fl ange-DEF
Air inlet 3/8" NPSM (F) 3/8" NPSM (F) 3/8" NPSM (F)
Wetted materials See model specifi cations See model specifi cations See model specifi cations
Noise level 80 db 80 db 80 db
Temperature range (see
material temperature
range on page 2)
0 - 158 ºF (0 - 70 ºC) 0 - 158 ºF (0 - 70 ºC) 0 - 158 ºF (0 - 70º C)
1/2" DOUBLE DIAPHRAGM PUMP CF10 (10 gal/min)
1/2" DOUBLE DIAPHRAGM PUMP CF15 (13.21 gal/min)
1" DOUBLE DIAPHRAGM PUMP CF30 (22.7 gal/min)
Operation and maintenance
manual
CF10
1120-029
CF15
1120-025
1120-027
1120-023
1120-028
CF30
1120-024
1120-026
1120-031
Technical data 1
Warnings and cautions 2
Description 2
Capacity curves 3
Dimensions 4
Installation 5
Operating instructions 6
Exploded views:
CF10 7
CF15 Polypropylene 8
CF15 Metallic 9
CF30 10
Repair kits / Wetted parts 11
Troubleshooting 12
Maintenance guide 14
Technical data
* (oz,ft,gal/min) all in EEUU units
Product customization
CODES:

2SB 1145 A. 11/16
2016_11_4-8:10
Warnings and cautions
In this document you will find warnings and cautions for installation,
use and maintenance of the Centerflo pumps.
This symbol, be aware that there is a danger of serious bodily
injury or death if you ignore the warning described.
This symbol, be aware that there is a danger of personal injury or
property damage if you ignore the caution described.
Warning Caution
• This equipment is for professional use only.
• Do not degrade the integrity of the equipment. Use only original
replacement components from Balcrank Corporation.
• Fluids not suitable for the pump can cause damage to the pump
unit and involve risk of serious personal injury.
• Consult Balcrank Corporation if you have any questions about
the wetted materials of the pump, and always check compatibility
of the fluids, and the pump materials, including elastomers with
the fluid supplier.
• Install and use the pump according to all local and national
regulations and abide all health and safety laws or legislation.
• The pump can produce fluid pressures equal to the air supply
pressure. Do not exceed the maximum allowable pressure of
100 psi (7 bar) air supply.The total hydraulic pressure (differential
pressure + system) should never exceed 100 psi (7 bar).
• Never use a pump that leaks, that is damaged, that is corroded
or otherwise it may lack the capacity to contain the fluid.
• Frequently check that the bolts on the diaphragm covers of the
pump to ensure they are torqued correctly (see page 14 for
torque specifications).
• Do not use a model with aluminium wetted surfaces to pump
fluids for human consumption, there is a possibility of trace
contamination of lead.
• Danger of explosion if used 1,1,1-trichloroethane, methylene
chloride or other halogenated hydrocarbon solvents with
aluminium wetted materials. It could cause serious injury and
property damage.
• Inside the pump, diaphragms separate the fluid that is being
pumped from the air supply. If a diaphragm breaks, the fluid can
leak out of the air exhaust and contaminate the environment.
• When handling hazardous fluids, always route the air exhaust
into a suitable container and locate it in a safe place.
• When the fluid source level is situated higher than the pump,
(flooded suction), the outlet tank must be at a higher level than
the product to prevent spills.
• For pumps handling hazardous fluids that are a danger to
humans or to the environment, install a suitable container
surrounding the pump to prevent any leaks or spills.
• Ensure that the operators of this equipment are trained on the
operation and limitations. Use safety equipment such as safety
goggles or other equipment required.
Carefully read the instructions and warnings before operating the equipment!
Warning
Here’s the meaning of symbols you may find in this document and
general warnings that you should keep in mind.
WARNING
DANGER: Not for use with fluids
that have a fl ash point below 100°F
(38°C). Examples: gasoline, alcohol. Sparking could result
in an explosion which could result in serious injury or death.
!
In the presence of explosive vapors, take
action to prevent static sparking. Failure to ground the
pump, piping, valves, containers, or other miscellaneous
equipment can result in fi re or explosion.
WARNING
!
WARNING
Do NOT use with solvents or other
explosive fl uids.
!
CAUTION
Pressure variations can cause vibration in piping
systems. Connect the pump to the piping system
using fl exible hoses. Ensure pipes and fi ttings are
properly secured to their supports. Do not use the
pump as part of the support structure of the piping
system.
!

3
A. 11/16 SB 1145
2016_11_4-8:10
Description
Air operated double diaphragm pumps are air-powered,
reciprocating positive displacement pumps with two pumping
chambers. Two diaphragms, centrally located in the chambers,
separate the compressed air (dry side) from the fluid being
pumped (wet side). A shaft transmits the reciprocating motion of
one diaphragm to the other. A directional valve alternatively
distributes the air from one chamber to the other; thus a
reciprocating movement of the diaphragms is created. With each
stroke, fluid is discharged by one of the diaphragms whilst the
opposite diaphragm sucks new fluid into the expanding chamber.
Check valves, two on the discharge side and two on the suction
side, control and direct the fluid flow.
Material Temperature range
PTFE 5 ºC - 105 ºC / 41 ºF - 221 ºF
NBR 10 ºC - 80 ºC / 50 ºF - 176 ºF
Acetal 10 ºC - 90 ºC / 50 ºF - 194 ºF
Hytrel®10 ºC - 90 ºC / 50 ºF - 194 ºF
Neopreno -18 ºC - 93 ºC / 0 ºF - 200 ºF
Santoprene®-29 ºC - 135 ºC / -20 ºF - 275 ºF
Viton®-10 ºC - 120 ºC / -4 ºF - 248 ºF
Polypropylene®10 ºC - 80 ºC / 50 ºF - 176 ºF

4SB 1145 A. 11/16
2016_11_4-8:10
Capacity curves
OUTLET PRESSURE
Litres per minute
0 6010 20 30 40 50
0 2,6 5,28 7,4 10,5 13,2
00
7 100
687
572,5
458
3 43,5
229
1 14,5
16
U.S. Gallons per minute
BAR
PSI
HEAD
4 bar5 bar6 bar7 bar
0
Nl/min SCFM
195
100
50
0
3,53
1,765
0
Nl/min SCFM
250
200
150
100
50
0
8,82
7,06
5,295
150 5,295
6,88
3 bar
0
Nl/min SCFM
138
100
50
0
3,53
4,87
1,765
3,53
1,765
0
Nl/min SCFM
318
250
200
150
100
50
0
8,82
11,22
300
7,06
5,295
3,53
1,765
0
Nl/min SCFM
368
350
300
250
200
150
100
50
0
8,82
10,58
12,35
12,98
7,06
5,295
3,53
1,765
NPSH
2
10
8
6
4
6,5
33
26
20
13
Meter
Feet
AIR CONSUMPTION
100 psi / 7 bar
87 psi / 6 bar
72,5 psi / 5bar
58 psi / 4 ba r
43,5 psi / 3 ba r
OUTLET PRESSURE
Litres per minute
010203040
02,6 265,28 7,4 10,5
50
13,2
60
16
70
18,6
80 90
21 23,7
100
29
110
31,7
120
00
7 100
687
5 72,5
458
3 43,5
229
1 14,5
U.S. Gallons per minute
BAR
PSI
HEAD
4 bar5 bar6 bar7 bar
0
Nl/min SCFM
290
100
200
50
0
3,53
150 5,29
7,06
8,82
10,24
1,76
0
Nl/min SCFM
350
200
150
100
50
0
12,35
7,06
250 8,82
300 10,58
5,295
250
3 bar
0
Nl/min SCFM
232
100
150
200
50
0
1,76
3,53
5,29
7,06
8,19
3,53
1,76
0
Nl/min SCFM
410
250
300
350
200
150
100
50
0
8,82
10,58
12,35
14,12
14,47
400
7,06
5,29
3,53
1,76
0
Nl/min SCFM
490
350
400
450
300
250
200
150
100
50
0
8,82
10,58
12,35
14,12
15,88
12,30
7,06
5,29
3,53
1,76
NPSH
2
10
8
6
4
6,5
33
26
20
13
Meter
Feet
AIR CONSUMPTION
100 psi / 7 bar
87 psi / 6bar
72,5 psi / 5 bar
58 psi / 4 ba r
43,5 psi / 3 ba r
CF10
CF15
CF30
*Tested at room temperature, using water. Flooded pump with 3.5 inches, (80 mm), positive suction head.
AIR CONSUMPTION
0 5 10 15 20 25 30 35 40
0 2,6 5,8 7,4 10, 5
100
87
72, 5
58
43
29
14
0
7
6
5
4
3
2
1
0
100 psi / 7 bar
87 psi / 6 bar
72,5 psi /5 bar
58 psi / 4 ba r
43,5 psi / 3 ba r
00
2.01 59.3
2.21 65.3 0 0
2.51 73.9 0.67 19.8
2.89 85.3 1.72 50.8 0 0
3.37 99.4 2.67 78.9 0.87 25.6
3.94 116.2 3.53 104.1 1.94 57.1 0,00 0,00
4.61 135.8 4.28 126.3 2.89 85.4 0.69 20.3
5.36 158.2 4.94 145.6 3.74 110.5 1.72 50.8 0,00 0,00
6.21 183.2 5.49 162 4.49 132.4 2.63 77.6 0.42 12.5
7.16 211.1 5.95 175.5 5.12 151.1 3.42 100.8 1.32 39
8.19 241.6 6.31 186.1 5.65 166.7 4.08 120.3 2.12 62.5
9.32 274.9 6.57 193.7 6.07 179.1 4.62 136.3 2.81 83
10.54 310.9 6.73 198.4 6.38 188.3 5.04 148.6 3.41 100.5
11.85 349.7 6.79 200.3 6.59 194.3 5.33 157.3 3.9 115
OUTLET PRESSURE
US gpm
l/min
BAR
PSI
Nl/min
Nl/min
Nl/min
Nl/min
SCFM
SCFM
SCFM
SCFM
Nl/min SCFM
4 ba4 bar5 ba5 bar6 ba6 bar7 ba7 bar 3 ba3 bar

5
A. 11/16 SB 1145
2016_11_4-8:10
Dimensions
Only for model
1120-028
CF10
ABCDE FG I J KLNP
5.12" 6.3" 6.38" 4.13" 4.8" 0.31" 5.51" 2.76" 1/2"
NPT
5.71" 3/8"
NPSM M6
1.61"
130
mm
160
mm
162
mm
105
mm
122
mm 8 mm 140 mm 70 mm 145 mm 41 mm
CF15
ABCDEFG
6.14" 6.3" 6.57" 4.13" 4.8" 0.31" 5.75"
156 mm 160 mm 167 mm 105 mm 122 mm 8 mm 146 mm
IJ J KLMN
2.76" 1/2” NPT 1/2” BSP 5.91"
3/8" NPSM
0.94"
M6
70 mm
1120-023
1120-027
1120-028
1120-025 150 mm 24 mm
CF30
ABCDEFG I J J K L
8.5" 7.44" 8.94" 6.89" 6.06" 0.35" 7.24" 3.72" 1” NPT 1" BSP 8.27"
3/8" NPSM
216 mm 189 mm 227 mm 175 mm 154 mm 9 mm 184 mm 94,51
mm
1120-024
1120-026 1120-031 210 mm
N
N

6SB 1145 A. 11/16
2016_11_4-8:10
Installation
Installation recommendations
• Remove the pump from its package and install it on the chosen
location.
• Try to minimize the suction head. Install the pump as close as
possible to the fluid being pumped.
• Remember to have enough space around the pump to perform
maintenance tasks.
• Keep in mind to connect the inlet and outlet of the pump
correctly.
• In case of diaphragm failure, the air exhaust will expell the
product being pumped.
• When the pump is installed in a place where a spill of fluid can
cause an environmental impact, the exhaust should be directed
to a place.where this spill could be contained.
• When installing the pump in its place, use brackets to secure its
base.
• Prior to operation, tighten all bolts according to the torques
contained in this manual (see page 14).
CF pumps are very easily configured and easy to install.
Flooded:
The pumping system was designed with positive pressure at the
inlet. This is the best possible installation when you need to
evacuate the liquid from the drum or tank, or when working with
viscous fluids. Not recommended for hazardous fluids.
Self-priming:
Pump is designed to generate vacuum. It is possible to evacuate
all the air from a hose or pipe without damaging the pump.
Maximum suction height is 19.69 ft (6 m), with the suction hose
empty and up to 26.25 ft (8 m) with the hose primed. (See page 1
for corresponding suction lift).
Submerged:
All pumps can be immersed in fluids. It is important to verify that
all components that are in contact with the fluid are chemically
compatible. In this case, air exhaust and fluid must be carried by
hoses (optional air connection).
Recommended installation
The figure below shows the recommended configuration for the installation
of a diaphragm pump. Read the warnings and recommendations of the
previous page before starting.
NOTE: Use a pressure regulator with built-in
filter inlet.
NOTE: The compressed air supply must be
between 43.5 psi (3 bar) and 100 psi (7 bar).
Model Fluid Inlet Hose Fluid Outlet
Hose
CF10 > =1/2” > =1/2”
CF15 > =1/2” > =1/2”
CF15 Mixing > =3/8” > =1/2”
CF30 > =1” > =1”

7
A. 11/16 SB 1145
2016_11_4-8:10
Operating instructions
This pump is self-priming.
To prime it the first time, you must connect the air pump supply at
a low pressure using the pressure regulator while keeping the outlet
valve open. Slowly increase the air pressure until fluid begins to
flow from the pump outlet, and the desired fluid flow is achieved.
Installation
Warning
Air connection
To ensure that the air supply is sufficient to meet the demand of
the pump, the diameter of the pipe must be equal to the diameter
of the supply port of the pump. Choose auxiliary air treatment
equipment and fittings with sufficient airflow to exceed the air
consumption of the pump. In addition, peripheral air treatment
equipment must be installed as close as possible to the pump unit.
The use of a coupler to connect the hoses aids future operation
and maintenance tasks.
When fluid begins to flow from the pump outlet, the pump is
primed. For regulation of fluid pressure, the unit must be supplied
with an air pressure between 43.5 and 100 psi (3 and 7 bar).
Adjust the discharge valve on the discharge side to control flow.
For the performance characteristics of the pump see the capacity
curve shown on page 3.
Stopping the pump
• Close the inlet valve of the pump and stop the air supply.
• Make sure for your safety that the air valve is closed.
• Turn off the air compressor, or close the valve on the air supply side of the
auxiliary equipment.
• Close the discharge valve on the discharge side, then begin to slowly open
the drain valve and discharge pressure fluid.
• Open the air valve of the pump, turn on the pump and flush the remaining
fluid.
• After ensuring that the pump was turned off and the pressure was released, fully
open and close the regulator valve and drain valve of the pump.
Grounding the pump
• When installing the pump, be sure to perform grounding in the
specified location.
• Also connect ground wires for the auxiliary equipment and
piping.
• Use a grounding cable of at least 12 gauge (2.0 mm2).
STICKER THAT
SHOWS THE
POSITION OF THE
GROUND WIRE
• Connect grounding wires to the pump, piping and all other
equipment too.
• When the pump operates ungrounded or with an incorrect
connection, friction between parts and abrasion caused by some
fluids that flow inside the pump, can generate static electricity.
Moreover, according to the type of fluid pump and the installation
environment (such as gases in the air or the type of the
surrounding facilities) static electricity can cause fire or electric
shock.
Warning
• If the pump you have purchased is valid for Atex, a specific Atex
manual will accompany this one. Read this manual before
operating the pump.
• If the unit is marked with the symbol, it can be used in
potentially explosive atmospheres. Below this symbol, in the
nameplate of the pump, are indicated the areas for which the
equipment is approved.You will also find the maximum allowable
surface temperature in the same plate.

8SB 1145 A. 11/16
2016_11_4-8:10
Composite body pump parts
No. Code Description Qty. Notes
1 Table 1 Directional Valve 1 Options: Normal exhaust
Driven exhaust
2 Table 2 Balls -
3 Table3 Ball check seats / O-rings / Ball guides -
4Table 4 Bushing / Seal / Push rod -
5Table 5 Diaphragms -
6Table 6 Air sensors -
7Diaphragm cover 2 (Not sold as a kit)
8 Diaphragm cover bolts 12 (Not sold as a kit)
9 Pump shields 2 (Not sold as a kit)
11 Diaphragm cover washers 4 (Not sold as a kit)
12 Valves cap bolts 8 (Not sold as a kit)
13 Valves caps 2 (Not sold as a kit)
14 Body 1 (Not sold as a kit)
15 Pump support 1 (Not sold as a kit)
16 Support bolts 4 (Not sold as a kit)
17 Cover 2 (Not sold as a kit)
Directional valve is sold do a kit.
Assembled and verified in Balcrank.
Externally controlled
Driven
exhaust
Normal
exhaust
CF10

9
A. 11/16 SB 1145
2016_11_4-8:10
Composite body pump parts
CF15 polypropylene pumps
All instances
No. Code Description Qty. Notes
1 Table 1 Directional valve 1 Options: Normal exhaust
Driven exhaust
2 Table 2 Balls -
3 Table 3 Ball check seats / O-rings / Ball guides -
4Table 4 Bushing / Seal / Push rod -
5Table 5 Diaphragms -
6Table 6 Air sensor -
7Diaphragm cover 2 (Not sold as a kit)
8 Diaphragm cover bolts 16 (Not sold as a kit)
9 Pump shields 2 (Not sold as a kit)
10 Diaphragm cover nuts 16 (Not sold as a kit)
11 Diaphragm cover washers 4 (Not sold as a kit)
12 Valves cap bolts 8 (Not sold as a kit)
13 Valves caps 2 (Not sold as a kit)
14 Body 1 (Not sold as a kit)
15 Pump support 1 (Not sold as a kit)
16 Support bolts 4 (Not sold as a kit)
17 Cover 2 (Not sold as a kit)
1
Directional valve is sold do a
kit. Assembled and verified in
Balcrank.
Driven
exhaust
Normal
exhaust

10 SB 1145 A. 11/16
2016_11_4-8:10
Composite body pump parts
No. Code Description Qty. Notes
1 Table 1 Directional valve 1 Options: Normal exhaust
Driven exhaust
2 Table 2 Balls -
3 Table 3 Ball check seats / O-rings / Ball guides -
4Table 4 Bushing / Seal / Push rod -
5Table 5 Diaphragms -
6Table 6 Air sensor -
7Diaphragm cover 2 (Not sold as a kit)
8 Diaphragm cover bolts 16 (Not sold as a kit)
9 Pump shields 2 (Not sold as a kit)
10 Pump shield bolts 8 (Not sold as a kit)
12 Valves cap bolts 8 (Not sold as a kit)
13 Balls caps 2 (Not sold as a kit)
14 Body 1 (Not sold as a kit)
17 Side cover 2 (Not sold as a kit)
1
Directional valve is sold do a
kit. Assembled and verified in
Balcrank.
Externally
controlled
Driven
exhaust
Normal
exhaust
CF15 and Metallic

11
A. 11/16 SB 1145
2016_11_4-8:10
Composite body pump parts
CF30
No. Code Description Qty. Notes
1 Table 1 Directional valve 1 Options: Normal exhaust
Driven exhaust
2 Table 2 Balls -
3 Table 3 Ball check seats / O-rings /
Ball guides -
4Table 4 Bushing / Seal / Push rod -
5Table 5 Diaphragms -
6Table 6 Air sensor -
7Diaphragm cover 2 (Not sold as a kit)
8 Diaphragm cover bolts 20 (Not sold as a kit)
10 Diaphragm cover nuts 7 (Not sold as a kit)
12 Diaphragm cover washers 12 (Not sold as a kit)
13 Valves caps 2 (Not sold as a kit)
14 Body 1 (Not sold as a kit)
17 Cover 2 (Not sold as a kit)
21 Upper shield 1 (Not sold as a kit)
22 Lower shield 1 (Not sold as a kit)
23 Shield attachment 4 *Only for composite
Directional valve is sold do a
kit. Assembled and verified in
Balcrank.
Externally
controlled
Driven
exhaust
Normal
exhaust

12 SB 1145 A. 11/16
2016_11_4-8:10
Pumps repair kit codes
Table 1 Table 2 Table 3
Pump size Balcrank code Directional
valve Kit code Balls Kit code Ball valves seats / Seals / Cages Kit code
CF10 1120-029 Standard 833206 PTFE 833208 Stainless steel / Viton / Polypropyl-
ene 833209
CF15
1120-027 Standard 833206 ACETAL 833236 Stainless steel / Viton / Acetal 833330
1120-023
1120-025 Standard 833206 PTFE 833208 Stainless steel / Viton / Polypropyl-
ene 833209
1120-028 Standard 833206 ACETAL 833236 Stainless steel / Viton / Acetal 833330
CF30
1120-024 Standard 833212 NBR 833656 Stainless steel / NBR / Acetal 833214
1120-026
1120-031 Standard 833212 PTFE 833233 Stainless steel / Viton / Polypropyl-
ene 833234
Table 4 (See note 1 at the bottom of the page) Table 5 (See note 1 at the bottom of the
page) Table 6
Pump size Balcrank code Bushing / Seals / Shaft Kit code Diaphragms Kit code Air sensor Kit code
CF10 1120-029 PTFE / Viton / Stainless steel 833336 HYTREL 833337 Standard 833207
CF15
1120-027 PTFE / NBR / Stainless steel 833237 HYTREL 833338 Standard 833207
1120-023
1120-025 PTFE / Viton / Stainless steel 833332 HYTREL 833338 Standard 833207
1120-028 PTFE / Viton / Stainless steel 833332 HYTREL 833338 Standard 833207
CF30
1120-024 PTFE / NBR / Stainless steel 833657 NBR 833658 Standard 833207
1120-026
1120-031 PTFE / Viton / Stainless steel 833335 HYTREL 833339 Standard 833207
DF 55x xxx
DF 55x xxx
*note 1 For pumps prior to February 2013 (Serial nº prior to 329041/250) the replacement kit has to be ordered from a Balcrank Technical Specialist

13
A. 11/16 SB 1145
2016_11_4-8:10
Troubleshooting
The pump does not work.
Cause Recommended measure
The discharge valve on the discharge side is not open. Open the discharge valve on the discharge side.
No air supply. Turn on the compressor and open the air valve and air regulator.
The air supply pressure is low. Check the compressor and the configuration of the air line.
Air leaks in connecting elements. Check the connection elements and the tightening of the screws.
The air pipes or ancillary equipment is clogged. Check and clean the air line.
The exhaust port (muffler) of the pump is clogged. Check and clean the exhaust port and muffler.
The fluid pipe is clogged. Check and clean the fluid line.
Pump is clogged Remove, inspect and clean the pump body.
The pump runs but no fluid comes out.
Cause Recommended measure
The valve on the suction side is not open. Open the valve on the suction side.
Too much suction or discharge height. Confirm the configuration of the pipe and reduce the height of the
same.
Fluid pipe discharge side (including the filter) is clogged. Check and clean the fluid line.
Pump is clogged. Dismantle the pump, check and clean.
The ball and ball seat is worn or damaged. Inspect and replace parts.
The flow is decreasing.
Cause Recommended measure
The air supply pressure is low. Check the compressor and the configuration of the air line.
The air line or peripheral equipment clogged. Check and clean the air line.
Valve discharge side drive will not open normally. Adjust the discharge valve discharge side.
The air mixes with the fluid. Replenish fluid and check the configuration of the pipe on the suction
side.
Cavitation occurs. Adjust air supply pressure and discharge pressure and reduce the
suction.
Vibrations. Adjust air supply pressure and discharge pressure. Reduce the
flow of the inlet valve to adjust pressure and volume of fluid.
Ice formation in the air exhaust. Remove ice from the air bypass valve and check and clean the air
filter. Use a pipe in the exhaust air that the ice does not form in the
muffler.
The fluid line (including the filter) clogged Check and clean the fluid pipe and strainer.
The exhaust port (muffler) of the pump is clogged. Check and clean the exhaust port and muffler.
Pump is clogged. Remove, inspect and clean the pump body.
Leakage of fluid through the hollow exhaust (silencer).
Cause Recommended measure
The diaphragm is damaged. Remove and inspect the pump and replace the diaphragm.
Irregular noise.
Cause Recommended measure
The air supply pressure is too high. Adjust air supply pressure.
The pump is clogged with sludge particles larger than the diameter
allowed.
Remove, check and clean the pump body.
Irregular vibration.
Cause Recommended measure
The elements of connection and the support of the pump are
loose.
Review each element of connection and tighten the screws.
The air supply pressure is too high. Adjust air supply pressure.
The range and ball valve vibrates. Adjust air supply pressure and exhaust pressure.

14 SB 1145 A. 11/16
2016_11_4-8:10
Powered air leak pressure of 43.5 -100 psi (3 to 7 bar).
Cause Recommended measure
Wear directional valve. Replace directional valve components.
No start-up and is leaking air without cycles.
Cause Recommended measure
Stiff air sensors. Change air sensor.
Worn directional valve. Replace.
Troubleshooting
Fluid is milky or has air bubbles.
Cause Recommended measure
Diaphragm damaged. Replace diaphragm.
Suction hose loose or broken. Tighten or replace.

15
A. 11/16 SB 1145
2016_11_4-8:10
Repair and maintenance procedures
Torques necessary for the proper functioning of the pump
For proper operation of the pump and to prevent accidents which may damage equipment and in the worst case, people, you must
periodically review the torques of the diaphragms covers and the DIRECTIONAL VALVE. In the next table are shown the appropriate
torques for this purpose:
Torques CF15
Diaphragm cover 48.67 - 53.1 lbf·in (5,5 - 6 N·m)
Directional valve 44.25 lbf·in (5N·m)
Valve cap 35.4 lbf·in (4 N·m) Aluminium - 30.9 lbf·in (2 N·m) composite
Diaphragm replacement
Torques CF10
Diaphragm cover 70.81 lbf·in (8 N·m)
Directional valve 44.25 lbf·in (5 N·m)
Valve cap 30.9 lbf·in (2 N·m) composite
Torques CF30
Diaphragm cover 137.7 lbf·in (15 N·m)
Directional valve 44.25 lbf·in (5 N·m)
Valve cap 35.4 lbf·in (4 N·m) Aluminium - 30.9 lbf·in (2 N·m) composite
Before any intervention: DISCONNECT AIR SUPPLY OF THE PUMP.
IT IS NOT NECESSARY TO REMOVE THE PUMP FROM THE FLUID
LINE.
1. Close fluid valves.
2. Drain the fluid inside the pump. Anticipate a drainage of fluid from
inside the pump.
3. Remove the directional valve while being careful not to damage
the seals.
4. Remove the diaphragm cap.
NOTE: To tighten these screws you must use a torque
wrench calibrated to (see torque table in this page).
5. Remove the cover by gently pulling back.
6. Remove the used diaphragm and place the new one in the proper
position.
7. Assemble components.
4
A
6
5
3
Pushing rod
Remove the side cover on the right of the fluid inlet as shown in
the figure, following the procedure for “Diaphragm replacement".
Once the shaft is visible, use the following procedures:
1. Remove the shaft from its housing by pulling it from one end.
The Teflon®sleeve is threaded into the body. To remove use
snap ring pliers in the two holes indicated in the figure.
2. Once the sleeve has been removed, remove the quad ring
inside the pump body.
3. Replace the kit following the correct order shown in the
assembly drawing.
4. Reassemble the pump in reverse order.

16 SB 1145 A. 11/16
2016_11_4-8:10
Repair and maintenance procedures
Ball valves replacement
1. Close fluid valves.
2. Drain the fluid from inside the pump. Anticipate a drainage of
fluid from inside the pump.
3. Loosen the screws to remove the directional valve. Take special
care with the seals.
4. Remove the valve cover by loosening the screws with an Allen
wrench. Take note of the orientation of the cap, as it is critical
to replace it correctly during reassembly.
To avoid fluid restriction and leakages, follow the position of the
ball checks guides in figure 1 below. The valves caps must be
placed with the area indicated in the figure below facing the center
of the pump body, shown in figure 2
5. Install a new set of valves according to these assembly
drawings. Ensure that the ball guides are assembled as shown
in the figure below, and tighten the screws with a maximum
torque (see torque table page 14).
6. Assemble the directional valve being careful not to
damage the O-rings and tighten the screws with a
maximum torque of 44.25 lbf·in (5 N·m).
Attention
Air sensor
The air sensors are on the inside part of the diaphragm covers.
To access them, follow the procedure for“Diaphragm replacement".
Once the covers are removed follow the procedure below:
1. Remove the two screws that secure the air sensor to the top.
2. Remove all components of the sensor. Clean the area.
3. Install the new components in the order shown.
4. Fit the cover on the pump and tighten the screws to the body
of the pump, with a maximum torque (see torque table page
14).
5. Fit the remaining components in reverse order.
figure 1
figure 2

17
A. 11/16 SB 1145
2016_11_4-8:10
Comments

18 SB 1145 A. 11/16
Balcrank™ Corporation · Weaverville, NC 28787 · 800-747-5300 · 800-763 0840 Fax · www.balcrank.com
2016_11_4-8:10
Balcrank® Corporation
SERVICE BULLETIN SB1145
Revision A 11/16
Revision Log:
Rev. A - New release
replaces SB1121, SB1122, SB1123, SB1124