IWAKI WALCHEM FZ-20T User manual

IWAKI WALCHEM
AIR DRIVEN BELLOWS PUMP
FZ-20T
INSTRUCTION MANUAL

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INTRODUCTION
Thank you for selecting an Iwaki Walchem FZ-20T Air Driven Bellows Pump. These pumps are
designed exclusively for pumping semiconductor grade, high purity liquids. To ensure safety and
maximum service life of the pump, please read this instruction manual thoroughly prior to installation
and operation.
CAUTION!
1. This instruction manual details the proper installation, operation and safety measures necessary to
ensure the safe and efficient use of this pump. Failure to adhere to the described handling,
installation and operating procedures may lead to malfunction or damage to the pump.
2. Always employ full safety measures and precautions when installing or servicing this type of pump
based on the liquid being handled. Common applications are hazardous strong acids. Follow all
safety procedures recommended by the chemical manufacturer.
3. To operate the pump, a controller system with adequate control and safety features is necessary.
The pump always requires the use of a 4-way solenoid valve. Please read the respective instruc-
tion manuals carefully for the proper installation and operating guidelines.
4. Please ensure that the end-user receives a copy of this instruction manual for reference.
P/N II20338.A 9/96
CONTENTS
SECTION PAGE
1 Unpacking and Inspection ...................................................................................................................... 3
2 Operating Principle................................................................................................................................. 3
3 Identification Codes ................................................................................................................................ 5
4 Specifications.......................................................................................................................................... 5
5 Handling Precautions .............................................................................................................................. 8
6 Installation, Piping and Wiring ................................................................................................................. 12
7 Operation ................................................................................................................................................. 20
8 Troubleshooting Guide.............................................................................................................................. 21

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1 Unpacking and Inspection
Open the package and check that the product conforms to your order. Also check each of the following
points. For any problem or inconsistency, contact Iwaki Walchem Corporation at once.
1. Check that the model number indicated on the nameplate conforms to the specifications of your order.
2. Check that the pump body and parts have not been accidentally damaged or that any fasteners have not
been loosened in transit.
Figure 1
Iwaki Walchem F Series Air Driven Bellows Pumps consist of a high purity virgin fluoroplastic pump head
assembly with dual bellows and internal valving. A bellows is affixed on each side of the pump head assembly
which houses the suction and discharge valves. A connecting rod and shaft system are mounted to the
bellows and structural air chambers which seal against the pump head assembly. The bellows move recipro-
cally in the air chambers as a result of alternating pressurization of the air chambers, by which liquid is pumped
continuously. Position of each bellows is monitored by proximity sensors mounted in the air chambers. Signals
from the proximity sensors are used by the controller system to govern the 4-way solenoid valve and subse-
quent pressurization of the pump air chambers.
2 Operating Principle
PROXIMITY SENSOR "A"
LIQUID CHAMBER "A"
AIR CHAMBER "a"
DISCHARGE PORT (TUBING)
DISCHARGE VALVE ASSY
LIQUID CHAMBER "B"
AIR CHAMBER "b"
PROXIMITY SENSOR "B"
SUCTION VALVE ASSY
CONNECTING ROD
BELLOWS "A" BELLOWS "B"
AIR SUPPLY PORT

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Refer to Figure 2. When pressurized air is supplied to chamber 'a' of the pump, bellows 'A' is compressed and
fluid is discharged from the bellows through the pump head discharge (outlet) port. Simultaneously, bellows 'B'
is extended and fluid is drawn into the bellows through the pump head suction (inlet) port. Air is being ex-
hausted from pump chamber 'b' during this process. When the 'B' bellows is fully extended, proximity sensor
'B' is activated to signal the completion of this stroke to the controller system.
The controller system receives the input signal from proximity sensor 'B' and changes the output signal to the
4-way solenoid valve to switch it from the a0position to b0position.
Refer to Figure 3. Once the 4-way solenoid valve is in the b0position, pressurized air is supplied to chamber
'b' of the pump and the process outlined above is reversed. Fluid is discharged from bellows 'B' while bellows
'A' is in its suction stroke and air is exhausted from chamber 'a.' Upon completion of this pump stroke,
proximity sensor 'A' is activated and the controller signals the valve to switch from the b0position to a0.
With a constant air supply, this sequence is repeated continuously and the pump achieves a constant flowrate
based on installation and operating conditions.
Figure 2
Figure 3
Operation Sequence:
a
0
b
0
Re
g
ulator
Air
supply
source
Proximity
sensor B
Proximity
sensor A
Iwaki Walchem Controller
or Host PLC, Computer
4 way Solenoid
valve
a
0
b
0
Re
g
ulator
Air
supply
source
Proximity
sensor B
Proximity
sensor A
Iwaki Walchem Controller
or Host PLC, Computer
4 way Solenoid
valve

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3 Identification Codes
1 2 3 4
FZ - 20 T -S
1. Series code: FZ: Non-metallic pump for medium temperature liquid
2. Maximum discharge volume: 20: 5.8 GAL/min (22 L/min)
3. Pump connection port (discharge port/suction port): T: 3/4"O.D. PFA tubing
4. Special specifications
No symbol: Standard specification
S: Special specification
Max. discharge volume Note 1 5.8 GAL/min (22 L/min)
Max. stroke speed 120 spm
Max. stroke length .94 in (24mm)
Self-priming ability Note 2 6.4 ft. (2m)
Liquid temp. range 41-212°F (5-100°C)
Max. supply air pressure 43 PSI (3kg/cm2)
Liquid-contacting material PFA/PTFE
Liquid piping connection port PFA ¾"tubing (19mm O.Dx15.8mm I.D.)
Supply air connection port 3/8" NPTF (3/8" PTF available)
Max. air consumption 8.8 CFM (250 NL/min)
Ambient temperature 32-104°F (0-40°C)
4 Specifications
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nFZ-20T Pump Specifications
Note 1: The maximum discharge volume is based on pure water at room temperature.
Note 2: The self-priming value is based on the maximum stroke rate with pure water at room temperature.