Corken Z Series, Z4200, Z2000, Z4500, Z3200 Installation, Operation & Maintenance Manual
...
ORIGINAL INSTRUCTIONS ID105K
Installation, Operation
& Maintenance Manual
Z-Series Sliding Vane Pumps
Truck and Stationary
Model Z2000 Truck Pump
Model Z3200 Truck Pump
Model Z3500 Truck and
Stationary Pump
Model Z4200 Truck Pump
Warning: (1) Periodic inspection and maintenance of Corken products is essential. (2) Inspection, maintenance and installation of Corken products
must be made only by experienced, trained and qualied personnel. (3) Maintenance, use and installation of Corken products must comply with
Corken instructions, applicable laws and safety standards (such as NFPA Pamphlet 58 for LP-Gas and ANSI K61.1-1972 for Anhydrous Ammonia).
(4) Transfer of toxic, dangerous, ammable or explosive substances using Corken products is at user’s risk and equipment should be operated
only by qualied personnel according to applicable laws and safety standards.
Model Z4500 Stationary Pump
Solutions beyond products...
Warning
Install, use and maintain this equipment according to Corken’s instructions and all applicable federal, state, local laws
and codes. Periodic inspection and maintenance is essential.
Corken One Year Warranty
CORKEN, INC. warrants that its products will be free from defects in material and workmanship for a period of one
year from date of installation, provided that the warranty shall not extend beyond twenty-four (24) months from the date
of shipment from CORKEN. If a warranty dispute occurs, the DISTRIBUTOR may be required to provide CORKEN
with proof of date of sale. The minimum requirement would be a copy of the DISTRIBUTOR’S invoice to the customer.
CORKEN products which fail within the warrant period due to defects in material or workmanship will be repaired or
replaced at CORKEN’s option, when returned, freight prepaid to CORKEN, INC., 3805 N.W. 36th St., Oklahoma City,
Ok l a h o m a 73112 .
Parts subject to wear or abuse, such as mechanical seals, blades, piston rings, valves and packing, and other parts
showing signs of abuse, neglect or failure to be properly maintained are not covered by this limited warranty. Also,
equipment, parts and accessories not manufactured by CORKEN but furnished with CORKEN products are not
covered by this limited warranty and the purchaser must look to the original manufacturer’s warranty, if any. This limited
warranty is void if the CORKEN product has been altered or repaired without the consent of CORKEN.
All implied warranties, including any implied warranty of merchantability or tness for a particular purpose, are
expressly negated to the extent permitted by law and shall in no event extend beyond the expressed warrantee period.
CORKEN DISCLAIMS ANY LIABILITY FOR CONSEQUENTIAL DAMAGES DUE TO BREACH OF ANY WRITTEN OR
IMPLIED WARRANTY ON CORKEN PRODUCTS. Transfer of toxic, dangerous, ammable or explosive substances
using CORKEN products is at the user’s risk. Experienced, trained personnel in compliance with governmental and
industrial safety standards should handle such substances.
Important notes relating to the European Union (EU) Machinery Directive
Pumps delivered without electric motors are not considered as machines in the EU Machinery Directive. These pumps
will be delivered with a Declaration of Incorporation. The fabricator of the machinery must assure and declare full
compliance with this Directive before the machine in which the pump will be incorporated, or of which it is a part, is
put into service.
Contacting the Factory
Before you contact the factory, note the model number and serial number of your pump. The serial number directs us to
a le containing all information on material specications and test data applying to your specic pump. When ordering
parts, the Corken service manual or Operations, Installation and Maintenance (IOM) manual should be consulted for
the proper part numbers. ALWAYS INCLUDE THE MODEL NUMBER AND SERIAL NUMBER WHEN ORDERING
PARTS.
The model and serial numbers are shown on the nameplate of the unit. Record this information for future reference.
Model No.
Serial No.
Date Purchased
Date Installed
Purchased From
Installed By
2
Table of Contents
APPLICABLE NOTICES FOR ATEX 94/9/EC CONFORMITY ...........................................4
PRINCIPLES OF THE Z-SERIES SLIDING VANE PUMP (CORO-VANE®) .................................5
EXCLUSIVE FEATURES OF THE Z-SERIES CORO-VANE® PUMP ......................................5
CHAPTER 1—INSTALLATION OF THE Z-SERIES CORO-VANE® TRUCK PUMP ..........................5
1.1 The Outlet Piping Should Include the Following ..................................................6
1.2 The Bypass System ........................................................................6
1.3 Power Take-off (PTO) Drive Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 Hydraulic Drive Systems ....................................................................7
CHAPTER 2—OPERATION OF THE Z-SERIES CORO-VANE® TRUCK PUMP ............................7
2.1 How to Transfer From the Truck Tank at Full Capacity ..............................................7
CHAPTER 3—INSTALLATION OF THE Z-SERIES CORO-VANE® STATIONARY PUMP .....................8
3.1 The Inlet Piping Should Include the Following ....................................................8
3.2 The Outlet Piping Should Include the Following ..................................................8
3.3 The Bypass System Must Include the Following ..................................................9
3.4 A Vapor Equalizing System Should be Included ..................................................9
3.5 Driver Installation ..........................................................................9
CHAPTER 4—OPERATION OF THE Z-SERIES STATIONARY CORO-VANE® PUMP ......................10
CHAPTER 5—MAINTENANCE OF THE Z-SERIES CORO-VANE® PUMP ...............................11
5.1 Purpose ................................................................................11
5.2 Scope ..................................................................................11
5.3 Procedures .............................................................................. 11
CHAPTER 6—Z-SERIES CORO-VANE® SEAL REPLACEMENT INSTRUCTIONS ........................13
6.1 Repair/Rebuild Kits with Iron Seal Seat ........................................................16
6.2 Repair/Rebuild Kits with Silicon Carbide Seal Seat ...............................................17
6.3 Assembly Instructions For All Z-Series Repair and Rebuild Kits .....................................18
APPENDICES
A. Model Number Identication Code and Available Options ..........................................19
B. Specications ............................................................................21
C. Performance .............................................................................22
D. Outline Dimensions ........................................................................28
E. Parts Details .............................................................................38
F. V-Belt Selection ...........................................................................45
G. Troubleshooting Guide .....................................................................46
H. Extended Storage .........................................................................48
I. Hydraulic Motor Specications ................................................................48
3
Applicable Notices for ATEX 94/9/EC Conformity
Product Type:
Sliding Vane Pump (Coro-Vane®)
Training Instructions:
Instructions for the safe application and use of this
product are provided in this manual. Read this manual
completely prior to installation and use of this product.
Only qualied and properly trained personnel should be
allowed to install, operate, and maintain this equipment.
Models Covered:
Z/ZH2000, ZX/ZXH2000, Z/ZH3200, Z3500, Z/ZH4200,
and Z4500
Intended Application:
The pump models covered by this manual conform to the
European Union ATEX 94/9/EC Directive for explosive
gas atmospheres and transfer of liqueed gases such as
Liqueed Petroleum Gas, anhydrous ammonia, freons,
etc. Electric motors for these pumps in the assembly must
comply with all applicable requirements for local, federal,
and regional codes and regulations.
Possible Misuse Warning:
The designated pump models must only be installed
in systems designed for its intended use, similar to the
examples presented in this manual.
ATEX Classication:
Group II; Category 2; G; Temperature Class T4 – T5
These products are classied under the ATEX directive
as Equipment – Group II – Category 2 – equipment is
intended for use in areas where explosive atmospheres
caused by gases or vapors (G) may be present. The
surface Temperature Class rating is a range between T4
275°F (135°C) and T5 212°F (100°C).
Nameplate:
ATEX directive 94/9/EC marking
Explosive
protection
Equipment classified as
Group II— Catagory 2
Explosive gas
atmosphere high level
Maximum surface temperature
T4 275°F (135°C)
File number
ATE X a nd
machinery directive
Mechanical Ignition Sources:
This equipment may be direct driven through a coupling by an
electric motor or belt driven by an electric motor. Guards for
the drive mechanism in the assembly intended for personal
protection are to be supplied by the customer. The pump
assembly including the drive system must be grounded to
prevent possible electrostatic discharge. Internal parts of the
pump require uid (product being pumped) or damage may
occur. Do not run the pump dry (without liquid in the pump).
The application of liquid level controls in the pump system
is recommended. Preventive Maintenance guidelines are
provided in this manual and are to be followed for the proper
operation and performance of the pump.
Sound Levels:
When properly installed and operated, these pumps do
not exceed 85 dBA noise levels at a distance of one
meter (3.281 ft) from the surface of the pump. This value
is highly dependent upon the installation and may vary
from installation to installation.
Piping Forces and Moments:
Maximum Allowable Pipe Torque
Z/ZH/ZX/ZXH2000
Inlet Size 2 in. (50 mm)
Torque 1,650 in•lbs (186 N•m)
Outlet Size 2 in. (50 mm)
Torque 1,650 in•lbs (186 N•m)
Z/ZH3200 and Z3500
Inlet Size 3 in. (80 mm)
Torque 1,800 in•lbs (203 N•m)
Outlet Size 2 in. (50 mm)
Torque 1,650 in•lbs (186 N•m)
Auxiliary
Inlet
Size 2 in. (50 mm)
Torque 1,650 in•lbs (186 N•m)
Z/ZH4200
Inlet Size 4 in. (100 mm)
Torque 1,900 in•lbs (215 N•m)
Outlet Size 2 in. (50 mm)
Torque 1,650 in•lbs (186 N•m)
Auxiliary
Inlet
Size 2 in. (50 mm)
Torque 1,650 in•lbs (186 N•m)
Preventative Maintenance
Pump Maintenance Schedule:
Daily Monthly 3 Months
Lubricate bearings X
Inspect drive couplings X
Clean inlet strainer X
Check for leaks X
Inspect hose and ttings X
4
Principles of the Z-Series Sliding
Chapter 1—Installation of the
Vane Pump (Coro-Vane®)
The Z-Series truck pump is a special type of rotary positive
displacement pump, known as a sliding vane pump.
The sliding vane pump has many of the positive displacement
advantages of the gear pump, plus the ability to compensate
for wear, and operate at a lower noise level.
The sliding vane pump consists of a rotor turning in a
cam (liner) machined eccentrically in relation to the rotor;
thereby displacing the liquid trapped between the rotor,
cam and vanes. The Z-Series pumps are made with vanes
produced from advanced polymers which exhibit extremely
low coefficients of friction. The vanes are self-adjusting for
wear which gives the pump long life.
Exclusive Features of the Z-Series Coro-Vane® Pump
The pumping of volatile liquids is one of the most difficult of all
pumping jobs, and pumping from a delivery truck makes it even
more difficult, so more attention must be given to the design and
manufacture of the pump and to its installation and operation.
Z-Series Coro-Vane® Truck Pump
Before installing of your pump, remove all temporary
plastic plugs.
The installation of the Z-Series pump is simple. However,
in order for the pump to deliver optimum performance, the
principles discussed in this book should be followed. The piping
details are furnished to illustrate methods proved by hundreds
of installations. Your own needs may require slight variations,
but every effort should be made to follow the recommendations
identied in this manual.
For the transfer of ammable liquids like LPG, the pump
must be installed according to the applicable local safety
and health regulations. The installer and/or the user must
take into account the following:
• Potential risk due to local conditions regarding the
installation and operation (e.g. poor ventilation and
additional risks due to other elements in the vicinity, etc.).
• Qualication of the personnel.
• Type of liquid being transferred.
In addition to being especially suited for handling volatile
liquids, the Z-Series pump has a number of features to help
make it more easily operated and maintained.
This model has been registered and listed by the
UNDERWRITERS’ LABORATORIES, INC. for use in the
handling of LP-Gas and Ammonia.
The CASE AND HEADS are made of ductile iron for extra
strength and toughness.
The VANES are manufactured of advanced polymers to
provide excellent life and quiet operation. After long service, the
vanes are simply and inexpensively replaced.
Both the CAM and the SIDEPLATES are easily replaced should
the need arise. Sideplates may be reversed for extended
service life.
The MECHANICAL SEAL is designed for longer life under greater
loads and may be inspected or replaced without disturbing the
piping of the pump. No special tools are needed.
BEARINGS are heavy-duty roller type for long bearing life.
PRESSURE GAUGE connections, 1/4 in. pipe thread, are provided.
• Specic safety measures to be applied (e.g. gas
detection, automatic shut-off valves, personal protection
equipment, etc.).
See Appendix A for shipping weight and Appendix D for
outline dimensions.
A rotation arrow is located on the side of the pump so
check the Power Take-off (PTO) to determine its direction
of rotation. The Z-Series pump will match either PTO
rotation. Connect the drive shaft to the pump shaft that
turns the pump in the direction of the arrow.
The PTO selection is important. The pump requires a
PTO with an average output speed of 420 to 800 RPM
when the truck engine is operating at the proper speed to
maintain oil pressure and water circulation.
The DRIVESHAFT connecting the pump to the PTO should
be of the “splined” or slip type. This type driveshaft permits
the shaft to adjust for PTO movement and twisting of the truck
frame. A xed driveshaft transfers the forces directly into the
pump and PTO and will shorten the life of both considerably.
The yokes of the driveshaft universal joints must be positioned
as shown. Improper positioning will soon wear them out and
potentially destroy the bearings in the pump and PTO.
The RELIEF VALVE is built-in and nonadjustable. The
valve is preset at the factory.
NOTE: EVEN WITH THIS INTERNAL SAFETY VALVE,
AN EXTERNAL BYPASS VALVE MUST BE INSTALLED.
INLET PIPING should be as short as possible with
minimum restrictions so that the pressure drop is limited.
Inlet piping is not generally required on the Z3200 or
Z4200. These pumps are bolted directly to the tank
internal valve and must be installed in accordance with
the valve manufacturer’s instructions.
5
Figure 1.1: Shaft Alignment
Correct assembly
Incorrect assembly
1.1 The Outlet Piping Should Include the Following
1. A liquid lled pressure gauge should be installed in the
pump outlet or near it. A pressure gauge is necessary
to determine the efficiency of your pumping system.
2. A hydrostatic relief valve is required by most state laws
and for your own safety.
Figure 1.2: Universal Joint Alignment
3. If a meter with a vapor eliminator is installed, pipe the
eliminator outlet to the top of your tank. Never pipe the
eliminator into the pump inlet piping or into the liquid
part of the system at any point.
4. The meter back-pressure valve may be piped into the
tank top or into the pump inlet piping.
5. The discharge piping should be at least the same size
as the meter.
1.2 The Bypass System
The internal safety relief valve is intended as a safety
device and not as an operational bypass valve. The
external bypass valve should be set at a differential
pressure lower than the internal relief valve and may be
connected to the tank at any convenient point, liquid or
vapor. All Z-Series pumps (except ZX2000, which is set
at 175 psid) are set near 150 psid.
ZH2000 Foot mounted hydraulic drive with NPT
connections
ZX2000 Foot mounted with NPT connections and high
pressure internal relief valve spring (175 psid
rather than the standard 150 psid)
ZHX2000 Foot mounted hydraulic drive with NPT
connections and high pressure internal relief
valve spring (175 psid rather than the standard
150 psid)
1.3 Power Take-off (PTO) Drive Systems
Proper pump operation and long life are directly dependent
upon a good drive system. Many truck pumps utilize a
power train consisting of shafts and universal joints from
a power take-off shaft on the truck engine to the pump.
There are several basic principles that should be followed
in laying out a PTO drive. These principles should not be
violated. Following them will produce a workable power train
that results in long pump life and reduced drive wear.
First, the driver shaft and the driven shaft must be parallel
to one another within plus or minus one degree. Improper
alignment will cause jerking and back and forth “whip” to the
pump shaft, thereby imparting a surging pulsation to the liquid
ow, which results in noise, vibration, and abnormal wear.
Second, the angle of the “oating” shaft should be within
the limits for the particular equipment being used (usually
a maximum of 15° at pump speeds up to 800 RPM). To
ensure that shaft expansion or contraction does not distort
the drive system, a splined slip joint should be placed
between the two universal joints. The drive shaft should
be of the “splined” or slip type to permit the shaft to adjust
for PTO movement and twisting of the truck frame. A xed
drive shaft transmits the forces directly to the pump and
PTO which will shorten the life of both considerably.
Third, the yokes of the drive shaft universal joints must be
in a parallel position. Figures one and two illustrate the
proper arrangement.
6
Improper installation of the U-joints will soon destroy
them along with the bearings in the pump and PTO.
Properly mounted, the second universal gives uniform
motion to the drive shaft by compensating for the
rotational error introduced by the rst U-joint. An even
number of universal joints (two, four, six, etc.) should
always be used. An odd number of U-joints will cause
unbalanced pump shaft rotation. This problem becomes
greater with increased angularity.
Other points to consider include the proper sizing of the
shaft components with a maximum horsepower load to be
expected, good alignment of hanger bearings and proper
pump coupling alignment. Improper PTO systems count for
a high percentage of truck pump failures. Always remember
to disengage the clutch before shifting the PTO into gear.
Shifting the PTO into gear without disengaging the clutch
imparts an enormous shock on the PTO, drive shaft, pump,
and meter and will soon damage one or all of them.
performance charts in Appendix C. Information on the CharLynn hydraulic motor is found in Appendix I.
Chapter 2—Operation of the Z-Series Coro-Vane® Truck Pump
Performance curves and charts are provided in Appendix C.
The following steps should be performed for the initial
pumping operation:
1. Close the shutoff valve on the end of the delivery hose.
2. Follow the instruction s of the internal valve manufacturer
for putting the valve into operation.
3. Start the pump and circulate liquid through the external
bypass system.
For proper installation of pump drives, follow the rules
listed below:
1. Driver shaft and pump shaft must be parallel, plus or
minus one degree.
2. Operating angle of the “oating” shaft must be 15
degrees maximum.
3. Universal yokes must be in line and parallel.
4. Splined slip joints must be used where needed.
5. Use an even number of universal joints.
6. Always use the least practical number of shafts.
PTO selection and drive system design is extremely
important. The PTO should have an average output speed
of 420 to 800 RPM when the truck engine is operating at
the recommended speed.
The designer of the drive system must select a PTO drive
shaft capable of meeting the torque requirements of the
pumping system.
4. If your system has a Corken bypass valve, adjust the valve
by turning the adjusting screw counter clockwise until the
pump discharge pressure gauge shows nearly the same
pressure it did before you started the pump. Turn the
adjusting screw clockwise until the gauge indicates about
90 to 115 psid above the tank pressure. If a bypass valve
of another make is used, follow the instructions provided
for adjusting the valve.
5. You may increase the speed of your pump as long as
it increases the capacity of the pump and does not
exceed the excess ow valve or external bypass valve
setting. The one exception occurs when the pump is
used to “Pump On” or to load the truck tank. In this
case, the pump inlet conditions are poor at best so the
pump should be operated at a slower RPM.
NOTE: IF PUMP SPEED IS INCREASED, BE
CERTAIN THE METERING SYSTEM WILL
HANDLE THE INCREASED FLOW.
WHEN PROPERLY INSTALLED AND OPERATED, Z-SERIES
CORO-VANE® TRUCK PUMPS DO NOT EXCEED AN 88
dBA NOISE LEVEL AT A DISTANCE OF ONE METER
(3.281 ft) FROM THE SURFACE OF THE PUMP.
1.4 Hydraulic Drive Systems
Truck pumps are also driven by hydraulic systems, consisting
of an adaptor, motor, pump, cooler, and connecting hoses.
The truck pump’s shaft must be properly aligned with the
hydraulic motor’s shaft to avoid excessive stress on the
truck pump’s main and thrust absorbing bearings. See
Appendix D for outline dimensions.
The sizing of the hydraulic motor, hydraulic pump, and hydraulic
oil cooler must be done using the operational requirements
of the truck pump (e.g. ow rate, differential pressure, pump
speed, and required torque and power). These data are on the
2.1 How to Transfer From the Truck
Tank at Full Capacity
To move volatile liquids rapidly from a truck tank requires that
a condition be maintained within the truck tank that keeps the
liquid and the vapors above the liquid in equilibrium . As liquid is
removed from the tank, some of the liquid boils to form vapor to
ll the space created as the liquid leaves. If this action becomes
too violent, the pump will begin to make noise, and the capacity
will be reduced. Truck pumps can lower the truck tank pressure
from 5 psi to 10 psi (below the starting tank pressure). If there
is no means provided for equalizing, then the trouble starts! As
the weather gets colder, the worse this condition will become.
7
You can detect this “pull down” in pressure by observing your
truck tank pressure gauge as the pump is operating.
To prevent this violent liquid boiling, pressure in some form
must be introduced into the truck tank. The simple way to
accomplish this is to “equalize” between the truck tank and
the receiving tank. Equalizing takes the higher pressure
vapors from the receiving tank and returns them to the truck
tank. As a result, the void left by the receding liquid is lled.
This in turn lessens the need for the liquid to boil excessively.
The equalizing principle is necessary for volatile liquids.
1/2" x 8" anchor bolt
Pump base
Concrete
Fig u re 3 .1
• Potential risk due to local conditions regarding the
installation and operation (e.g. poor ventilation and
additional risks due to other elements in the vicinity, etc.).
NOTE: Z4500
baseplate should be
filled with grout.
Metal shim
Large washer
NOTE: EQUALIZING BETWEEN TANKS OR THE
ADDITION OF PRESSURE IS NOT A LEGAL
TRANSFER IN MOST STATES. IF EQUALIZING LINES
ARE NOT PERMITTED REMEMBER THAT A QUIET PUMP IS
AN EFFICIENT PUMP. A NOISY PUMP IS NOT EFFICIENT
AND THE CONDITIONS THAT CAUSE THE NOISE ALSO
CAUSE WEAR TO INTERNAL PARTS. OPERATE THE PUMP
AT SPEEDS THAT RESULT IN A “QUIET” TRANSFER.
NOTE: EVEN WITH THIS INTERNAL SAFETY VALVE,
AN EXTERNAL BYPASS VALVE MUST BE INSTALLED.
Chapter 3—Installation of the Z-Series Coro-Vane® Stationary Pump
NOTE: All pumps should be installed in a well ventilated area.
The installation of the Coro-Vane® pump is simple. However,
in order for the pump to deliver optimum performance, the
principles discussed in this book should be followed. The
piping details are furnished to illustrate methods proved
by hundreds of installations. Your own needs may require
slight variations, but every effort should be made to follow
the recommendations identied in this manual.
No pump can discharge more liquid than it receives, so
the pump location and the inlet piping must be given
careful attention. If the inlet piping is inadequate to supply
the demand of the pump, you may expect trouble.
For the transfer of ammable liquids like LPG, the pump
must be installed according to the applicable local safety
and health regulations. The installer and/or the user must
take into account the following:
• The pump must be located as near the storage tank as
possible. For best results the pump inlet line including
the vertical line from the tank should not exceed 12 feet
(3.7 m) in length.
• The bottom of the tank should be at least two feet (0.6
m) above the pump center line. For best results four feet
(1.2 m) is preferred.
• Qualication of the personnel.
• Type of liquid being transferred.
• Specic safety measures to be applied (e.g. gas
detection, automatic shut-off valves, personal protective
equipment, etc.).
Appendix A shows the weight of the bare pump for each
model. For handling a bare pump, lifting slings should be
used. Web slings are preferred over metal slings to minimize
damage to the paint. See Appendix D for outline dimensions.
3.1 The Inlet Piping Should Include
the Following
1. The tank excess ow valve (EFV) should have a ow
rate of 1-1/2 to 2 times the capacity of he pump. Do not
use an EFV without knowing its ow capacity.
2. The tank shut-off valve should be a free-ow type and
not a standard globe valve.
3. A strainer of the “Y” type, with 30 to 40 mesh screen,
must be on the inlet line of the pump. (Mesh size
indicates the number of openings per lineal inch). A
10x pipe diameter before the pump is recommended.
4. Use a exible connection in the pump inlet and outlet
piping to compensate for piping strains.
5. Use an eccentric swage at the pump inlet nozzle to
change the line size (at side up).
6. Make the inlet line level or slope it downward to the pump.
3.2 The Outlet Piping Should
Include the Following
1. A liquid lled pressure gauge should be installed in the
pump outlet or near it. A pressure gauge is necessary
to determine the efficiency of your pumping system.
• The foundation for the pump is important. The foundation
must be rm, level and preferably made of concrete. The
suggestions in gure three should be observed.
2. A hydrostatic relief valve is required by most state laws
and for your own safety.
8
3. If the outlet piping exceeds 50 ft (15.2 m) in length, a
check valve should be installed in the discharge line
near the pump outlet.
3.3 The Bypass System Must
Include the Following
1. If the pump discharge is shut off before the driver has
stopped, a dangerously high pressure can develop;
therefore, an external bypass valve must be installed. The
installation of an external bypass valve permits the pump
to discharge its full capacity back to the supply tank at a
predetermined pressure. NOTE: Even though the pump
may have an internal relief valve, it is not a substitute for an
external bypass valve. The internal relief valve is a safety
relief valve for the pump only and not the entire system.
2. Always install a Corken ZV200 or B177 external
bypass valve in the discharge line of pump. The
bypass valve may discharge into the supply tank at
any convenient liquid or vapor opening; however, it
should not connect to the pump inlet piping.
3.4 A Vapor Equalizing System
Should be Included
To obtain maximum performance from your Coro-Vane® pump,
a vapor equalizing system should be installed. This system is
simply a pipe connecting the vapor sections of the tank being
unloaded and the tank being lled. This equalizing line allows
vapor to move freely between the two tanks (in either direction)
and assures that both tanks remain at the same pressure.
As liquid is withdrawn from a tank, it must be replaced by an
equal amount of vapor or the pressure in the tank will drop.
If an equalizing line is not present, this vapor is formed by
“boiling” of the liquid and a reduction of the tank’s pressure.
Meanwhile, the tank being lled experiences a pressure
increase as the rising uid levels compresses the vapor
space above it. A vapor equalizing line will eliminate both of
these problems and will reduce pumping time, differential
pressure, noise and wear on the entire system. Slow transfer
rates will minimize these effects, and reduce the need for a
vapor equalizing line. However, today’s high transfer rates
require that a vapor equalizing line be installed.
Another way to consider this principle is to remember that it
takes two holes in an oil can for oil to be poured smoothly from
the can; one for the oil to exit and the other for the air to enter.
3.5 Driver Installation
The wiring of your electric motor is extremely important and
must be done by a competent electrical contractor. The
following wire sizing chart indicates the minimum standards
for wire sizes.
Improper motor wiring will cause expensive motor
difficulties from low voltage. If you suspect you have low
voltage, call your power company. Connecting your motor
for the voltage you have available is important too. The
motors furnished with the stationary pumps are usually
dual voltage, so you must be sure of the voltage your power
company is supplying you. Your motor will be completely
ruined if it is connected to the wrong voltage.
A humid climate can cause problems, particularly in explosion
proof motor applications. The normal breathing of the motor,
and alternating between being warm when running and cool
when stopped, often will cause moist air to be drawn into
the motor housing. This moist air will condense, and may
eventually add enough free water to the inside of the motor
to cause it to fail. To prevent this, make a practice of running
the motor and pump at least once a week on a bright, dry
day for an hour or so (pumping through the bypass system).
In this period the motor will heat up and vaporize the
condensed moisture, and drive it out of the motor. No motor
manufacturer will guarantee an explosion-proof or totally
enclosed motor against damage from moisture.
Engine drivers pose a special consideration. The
manufacturer’s instructions must be followed. When the
stationary pump is equipped with an engine from the factory,
the engine speed should normally not exceed 1,800 RPM.
Excessive engine speed will overload the engine and cause
early failure. The engine loses 3% of its power for every
1,000 ft (305 m) above sea level, so if your installation is at a
higher altitude than normal, consult the factory.
Motor
Motor
Hp
phase
3 1 115 34.0 6 4 2
3 230 9.6 12 12 12
5 1 115 56.0 4 1 1/0
3 230 15. 2 12 12 10
7-1/2 1 230 40.0 8 6 4
3 230 22.0 10 10 8
10 3 230 28.0 8 8 8
15 3 230 42.0 6 6 6
20 3 230 54.0 4 4 4
25 3 230 68.0 2 2 2
30 3 230 80.0 1 1 1
40 3 230 10 0.0 2/0 2/0 2/0
50 3 230 130.0 3/0 3/0 3/0
1
Based upon 3% voltage loss copper wire type TW. Single phase
motor calculations are based on two times distance.
Approximate
Volts
220 17.0 12 8 8
460 4.8 12 12 12
230 28.0 10 6 4
460 7.6 12 12 12
450 11.0 12 12 12
460 14 .0 12 12 12
460 21.0 10 10 10
460 27.0 8 8 8
460 34.0 6 6 6
460 40.0 6 6 6
460 52.0 4 4 4
460 65.0 2 2 2
full load
amperes
Recommended
wire size, AWG
Length of run (ft)
0–100 to 200 to 300
1
9
Chapter 4—Operation of the Z-Series Stationary Coro-Vane® Pump
Performance curves and charts are provided in Appendix C.
The following steps should be performed for the initial
pumping operation:
1. Verify the strainer screen is clean.
8. Open any shut-off valves between the bypass valve
and the storage tank.
9. Make a note of all pressure gauge readings, especially
the pressure gauge located at the discharge of the
pump. Start the pump and circulate the liquid through
the bypass system back to the storage tank.
10. Verify the proper pump rotation direction. There is an
arrow cast in the pump case.
2. Rotate the pump by hand.
3. Check V-belt drive or direct drive coupling alignment.
Misalignment will cause accelerated wear of the drive
system, motor bearings, and pump.
4. Check motor for proper wiring.
5. Review complete system to make certain the function
of every valve and piece of equipment is clearly
understood. Everyone operating this system must be
properly trained in normal operating procedures and
emergency procedures in event of a malfunction.
6. Close all hose valves.
7. Slowly open the storage tank bottom shut-off valve
(suction line to the pump). Immediately check the
system for leaks.
11. An ampmeter may be used by adjusting the bypass valve
until the ampmeter indicates the full load motor amperage
rating shown on the motor nameplate or maximum rated
differential, whichever comes rst. Permit the pump
to circulate liquid for half an hour or more. If the motor
overload protection device stops the motor in this period
the bypass valve setting is too high and should be
readjusted until the motor will run for half an hour. After a
satisfactory setting is achieved, “seal” the valve adjusting
stem to prevent tampering with the adjustment. See
Important Instructions (IH102) and Installation, Operation
and Maintenance (IOM) Manual (IH106) for more details
on the use of the Corken bypass valves.
12. Your pump has an internal relief valve, it must be set
higher than the external bypass setting. The internal
relief valve is factory preset.
13. After initial operation, re-check the strainer screen.
Fig u re 4 .1
10
Chapter 5—Maintenance of the Z-Series Coro-Vane® Pump
5.1 Purpose
By following an effective maintenance program,
unscheduled downtime can be eliminated. This program
should be used by the Operation Manager to get a
maximum utilization of manpower and equipment as
well as to prevent possible unsafe situations and/or
production delays due to equipment breakdown.
Your Corken Z-Series Pump requires regular maintenance
and care like all mechanical equipment. A neglected
or improperly repaired pump will result in premature
failure and cause unsafe conditions. To promote product
longevity and safety, maintenance must be performed by
properly trained technicians. Make sure all safety systems
are in place and the system pressure has been relieved
before attempting ANY maintenance.
Make sure the transfer hoses are not “kinked” which can
cause excessive pump discharge pressure. Always make
sure your hoses are not out of date.
Normal wear parts are the mechanical seals, bearings,
vanes, and sideplates. All of these parts, plus O-rings
and grease seals, are offered in the Corken “repair kit”
listed in this manual directly after the Seal Replacement
Instructions. Use only genuine Corken replacement parts
when repairing the Z-Series pump. Follow the instructions
provided with the parts.
5.2 Scope
The Pump Maintenance Schedule table below includes
the items to be regularly checked and inspected with
a recommended time schedule. These are basic
maintenance recommendations, and each company
should develop their own comprehensive preventive
maintenance program schedule, tailor-made to their
individual operational procedures and requirements.
Pump Maintenance Schedule
Daily Monthly 3 Months
Lubricate bearings X
Inspect drive coupling X
Clean inlet strainer X
Check for leaks X
Inspect hose and ttings X
When it becomes necessary to repair your pump or
remove it from the system, you must be absolutely certain
that all propane, anhydrous ammonia, or whatever product
being pumped is bled from the pump and connecting
piping. Once all the product has safely been bled from the
pump and connecting piping, make certain no pressure
is left in the system. SPECIAL CARE MUST BE TAKEN
DURING THE BLEED DOWN PROCESS TO AVOID
DANGER TO PERSONNEL AND PROPERTY IN THE
AREA. Bleeding a system too fast is a common mistake
and may result in “refrigerated” liquid being left in the
pump and piping even though the pressure gauge shows
no pressure. As the “refrigerated” liquid begins to warm,
more gas will escape causing a dangerous condition.
Take your time in bleeding your system and make proper
provisions to vent or capture the gas in accordance with
local regulations.
NOTE: ONLY A PROPERLY TRAINED
INDIVIDUAL SHOULD BE ALLOWED TO BLEED
A PUMPING SYSTEM.
1. Visual Inspection:
This includes checking for leaks, corroded areas,
condition of hoses, piping and ttings, and any unsafe
condition which may hinder the safety of the personnel
and/or the facility.
Maintenance must only be performed by a properly trained
and qualied individual that follows all the applicable
safety procedures.
5.3 Procedures
ALL REPAIRS TO THE PUMP MUST BE
PERFORMED BY QUALIFIED PERSONNEL IN
A SAFE MANNER, UTILIZING TOOLS AND/OR
EQUIPMENT THAT ARE FREE OF HAZARDS, AND
FOLLOWS THE APPLICABLE SAFETY CODES OF
PRACTICE SET BY THE LOCAL AUTHORITIES
HAVING JURISDICTION. MAKE SURE THE SYSTEM
PRESSURE HAS BEEN RELIEVED BEFORE
ATTEMPTING ANY REPAIR TO THE PUMP.
11
2. Clean Inlet Strainer Screen:
A clogged strainer screen will create too much ow
restriction and vapor will be formed causing the pump
to cavitate. This reduces the pump’s capacity and
accelerates the wear of the internal parts.
3. Inspect Drive Coupling and Driveline:
Check the coupling alignment and the condition of the
union for cuts, broken sections and wear.
4. Lubricate Pump Bearings:
There are two lubrication points on the Z-Series
pumps. A grease zerk is located on the top of each
bearing cap. To prevent over greasing the bearings,
a grease relief tting is located on the bottom of each
bearing cap. Always clean each grease zerk and relief
tting before lubricating the bearings. This practice
helps prevent foreign material from reaching the
bearings through the grease zerk and ensures the
grease relief tting is not blocked. If the grease relief
tting is blocked, the excessive grease that cannot
be relieved may cause premature seal failure. If you
use a hand grease gun, put the grease in slowly
and stop as soon as the relief tting opens. Grease
the U-joints and the spline of the drive shaft when
greasing the pump.
NOTE: Always use ball bearing grease (MIL-G-10924C)
with a temperature rating of -65°F.
b. While transferring liquid with the pump, close the
discharge valve(s) so the full ow will be directed
back to the storage tank through the bypass valve.
Then slowly close the valve downstream of the
bypass valves. The discharge pressure of the
pump should increase to the maximum differential
pressure of the pump at no ow conditions (see
Appendix C: Performance Curves).
c. If the maximum differential pressure is not obtained,
the pump must be serviced. See Appendix G
Troubleshooting Guide for additional help.
d. Replace vanes or sideplates if worn.
5. Lubricate Motor Bearing:
If lubrication is required, follow the recommendations
of the electric motor manufacturer for the type of
grease to use and the lubrication frequency.
6. Performance Test:
a. While transferring liquid with the pump, check the
pressure at the pump’s inlet port. The pressure drop
in the inlet piping should not be greater than 3 psi.
7. Tighten all holddown bolts.
8. Inspect motor starter contact points.
This must be performed by an authorized and qualied
electrician, based on the electric motors manufacturer’s
guidelines.
12
Chapter 6—Z-Series Coro-Vane® Seal Replacement Instructions
Please Note: The photos listed below contain a Z2000;
however, all Z-Series pumps use the same procedures for
seal replacement.
To determine the parts needed for repair, refer to
Appendix A—Model Number and Identication Code,
and Appendix E—Parts Details.
CAUTION! BLEED ALL PRESSURE FROM THE
PUMP AND PIPING BEFORE STARTING TO
INSTALL YOUR SEAL ASSEMBLY.
Cleanliness
Even the smallest amount of dirt on your new seal can cause
early failure. Keep all parts, tools and your hands clean while
installing the seal. Never touch the smooth lapped faces
of the carbon rotor or seal seat. For LP-Gas, anhydrous
ammonia and similar liquids, you are trying to seal a uid
that is 5 to 10 times thinner than water! Your new seal needs
every chance it can get, so keep it clean.
Workmanship
Your Corken pump is a precision piece of equipment with
very close clearances. Treat it as such. Never use force
during assembly or disassembly (see steps 1 through 10).
Step 1
Depressurize and open the pump
Loosen the head bolts and remove one head with the
bearing cap attached, while holding in on the shaft.
Step 2
Remove the seal seat and grease seal
the workbench as shown in the photo. When replacing the
seal assembly, there is no need to remove the bearings.
With a long screwdriver, reach through the opening of the
bearing cap and lightly tap the seal seat until it falls out
of the head. The seal seat is located at the bottom of the
head. Next, remove the grease seal using same process.
The old seal seat and grease seal will not be reused.
Step 3
Install the new grease seal
NOTE: The photo above is using a cutaway view for
better details.
After the head has been removed from the pump, remove
the head O-ring and place to the side. Place the head on
NOTE: The photo above is using a cutaway view for
better details.
Turn the head over as shown in the photo and install the new
grease seal smooth side up by pressing into the bore next to
the main bearing. To assist with the installation of the grease
seal, place the old seal seat without the O-ring over the top of
the grease seal and press into place as show in the photo. The
grease seal should t ush with the shoulder of the bore (see
Figure 6.1 for details).
13
Sideplate
Step 4
Install the new seal seat
Carbon seal
Seal seat
Grease seal
NOTE ORIENTATION: The grease
seal is inserted with smooth side
up, flush with the shoulder of the
head, and directly beneath the seal
seat as shown in this illustration.
Roller bearings
Retainer ring
Thrust bearing mounting ring
Thrust bearings
Bearing cap
Rotor shaft
Fig u re 6 .1
Step 5
Remove the old seal assembly (carbon seal and retainer)
Head
NOTE: The photo above is using a cutaway view for
better details.
Be careful not to touch the smooth, shiny surfaces of the
seal seat. The smooth shiny surfaces must stay clean at all
times. Foreign material on these surfaces can cause seal
failure. Before installing the new seal seat, spray or apply a
generous amount of light oil to the new seal seat and O-ring.
This will allow the O-ring on the outside of the seal seat to
easily slide into place during installation. Before you press
the seal seat in place, make sure you cover the seal seat
with the protective cardboard disc as shown in the photo.
Remove the old seal assembly from the pump shaft while
holding the sideplate against the pump casing. This will
allow the seal retainer assembly to be removed without
pulling the rotor-shaft out of the pump. Inspect the rotor
shaft for burrs or scratches. If present remove with an
emery or polishing cloth.
14
Step 6
Install the new seal assembly (retainer and carbon)
Clean the pump shaft and apply a generous amount of light
oil to the shaft and seal assembly.
Step 8
Completing installation
Torque the head bolts in a crossing pattern. There is no
need to disassemble or re-shim the bearing caps. Repeat
all of the above steps when replacing the seal assembly
on the opposite side.
Install the new seal assembly by aligning the seal retainer
slot with the seal drive pin on the shaft.
Step 7
Mechanical seal installation
Install the new case O-ring onto the head.
Apply a generous amount of light oil to each seal face and
carefully install the head assembly over the pump shaft.
Step 9
Lubrication and re-pressurizing
Note: Both sides of the pump are identical; duplicate
procedure to change the seal on the opposite side.
Lubrication
There are two lubrication points on the Z-Series pumps.
A grease zerk is located on each bearing cap. To prevent
over greasing the bearings, a grease relief tting is
located on the opposite side of each bearing cap. Always
clean each grease zerk and relief tting before lubricating
the bearings. This practice helps prevent foreign material
from reaching the bearings through the grease zerk and
ensures the grease relief tting is not blocked. If the
grease relief tting is blocked, the excessive grease that
cannot be relieved may cause premature seal failure.
If you use a hand grease gun, put the grease in slowly
and stop as soon as the relief tting opens. Grease the
U-joints and the spline of the drive shaft when greasing
the pump.
NOTE: Always use ball bearing grease (MIL-G-10924C)
with a temperature rating of -65°F.
Re-pressurize
For best results, slowly pressurize with vapor pressure.
Please Note: If you pressurize with liquid, it will sometimes
refrigerate even though it enters the pump slowly. As a
result, the seal elastomers will not seal properly thereby
causing them to leak.
15
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