Vogt HAD Series Manual de usuario
2
Introduction
Introduction
VOGT is a company that provides comprehensive solutions in fluid handling
equipment according to the needs of the mining industry. Accordingly, VOGT offers a
range of pumping equipment capable of operating at high demands in slurry fluids that
reduce the cost of operation, maintenance and initial investment. VOGT Pumps offer a
high resistance to wear, thus increasing the useful life of its components.
The main purpose of this manual is to provide the necessary information for
installation, maintenance and start-up of the VOGT HAD Series pumps. In order to
increase the productivity of the equipment, it is recommended to carefully follow the
instructions below.
Store equipment indoors and cover flanges from contact with the environment.
Apply rust preventative coating to ground areas and rotate shaft on average once a month. Kendall Seal N Sound or
similar product is recommended.
For storage longer than 18 months, consider proper drainage of the pump and purge the labyrinth with grease to avoid
contamination of the bearings. Re-pack for long periods of time.
2.1 Indispensable to Maintain VOGT Warranty
3
Safety
Instructions
• The contents of this manual must be read and understood before installing and operating the pumping equipment.
• Carefully read and understand the motor manual, provided by the motor manufacturer, before operating the pumping
equipment.
• Learn how to stop the pumping equipment quickly and understand the operation of all controls. Do not allow the pumping
equipment to be used without the necessary instructions.
• Never place your hands, feet or any part of your body near rotating or moving parts.
• Never operate the pump without safety devices installed.
• Never operate the pumping equipment if any protection of the rotating parts is missing.
• The direction of rotation of the motor has to be checked before connecting belts or couplings. Operating the pump in the
wrong direction can cause accidents to personnel and damage to the equipment.
• Always carry out the inspection before starting the pump in order to avoid an accident or damage to the equipment.
• Never place flammable items such as fuel, matches, etc., near the pump while it is running.
• Never place objects or items of any kind on the motor or pump as this may create a fire hazard.
• The pump should not be operated at low or near zero flow conditions as this may cause vaporization of the pumped liquid,
the high pressure generated may cause accidents to personnel and damage to equipment. Slurry pumps should not be
operated at a flow rate less than 25% of BEP (Best Efficiency Point) for a given RPM level, as equipment damage and injury
could result.
• Never apply heat to remove the impeller, disassemble the pump or any part of it, as this could result in an explosion of the
trapped liquid.
• Never operate the pump beyond the operating range for which it was ordered.
• Always disconnect electrical power to the motor before performing repair and maintenance work.
• Never lift the complete equipment (pump-motor-bank assembly) by any part other than the lifting shackles with which the
structural frame is equipped.
!WARNING
VOGT S.A. INFORMS THAT CONTINUOUS OPERATION OF CENTRIFUGAL PUMPS WHEN SUCTION AND DISCHARGE ARE
BLOCKED IS POTENTIALLY DANGEROUS. EXCESS HEAT IS GENERATED WHICH VAPORIZES THE TRAPPED LIQUID.
THIS CAN CAUSE AN EXPLOSION WHICH CAN BE LIFE-THREATENING.
2.2 General Warnings
Safety Instructions
4
Safety
Instructions
Safety Instructions
•Never lift pumping equipment components and subassemblies (motor, pump, etc.) by anything other than the
proper lifting eyebolts suitable for each individual operation.
•Do not work under suspended loads.
•Never change the operating conditions without the respective approval and authorization of VOGT S.A.
•Check belt tension before starting up the equipment.
•Prime pump before operating, to avoid solid particles settling on start-up and causing equipment jamming.
•Do not pump very hot liquid into a cold pump or very cold liquid into a hot pump. The sudden change in
temperature will damage internal components and cause the pump casing to rupture.
•Use care when handling worn components with sharp edges (wear gloves during each maintenance operation).
Pump
Identification
- 10 -
5
Pump Identification
3.1 Pump Identification Codes
Each VOGT Pump has a nameplate on the base where the Pump model is identified. Each digit or letter of the equipment
code refers to the following:
Example:
40/25 2-HAD:
Inlet diameter of 40 [mm].
Discharge diameter of 25 [mm].
2 = bearing holder size
HAD= VOGT HAD Series pump, with interchangeable liners
A. Suction diameter is expressed in millimeters, e.g. 40, 50, 75, 100, etc.
B. Discharge diameter is also expressed in millimeters, such as 25, 40, 50, 75, etc.
C. The pump bearing carrier consists of a casing and bearing assembly. The size of the casing is identified between
one and four numbers, such as 2, 4, 5, 2021, etc.
6
Transaction
Information
Transaction Information
The pump performs its pumping work by means of the centrifugal rotary action of the impeller rotating inside the casing
and for everything to work properly the following considerations must be kept in mind:
1. Complete check of the entire pumping system prior to start-up. Piping properly aligned to the pump, valves in good
condition, controls operational, pump alignment and belt tension checked, etc.
2. GAP between impeller and suction disk should be checked. This should be between 1 and 2 [mm], to increase
efficiency and decrease recirculation inside the equipment.
3. Activate the water seal system before starting the pulp pump, adjust flow and pressure according to the equipment
requirements. This operation is performed with the pump in commissioning to verify water flow through the jacket.
4.1 Pump Baseplate
Before leaving the factory, the pump and its motor unit are mounted on a level base that serves as an assembly stand.
For alignment in the field, compensating bases (slats) are used to lift the motor if necessary for the correct assembly of
the motor-pump assembly. The bases installed on the foundation in the equipment installation area will support the base
of the assembly. Once the base of the assembly is installed and tightened against the foundation, the alignment of the
equipment is started, using the lag bolts if necessary.
4.2 Foundations
The foundation supporting the pump-motor assembly must be able to withstand vibrations of both the pump and the
motor and should be as close as possible to the source of the fluid to be conveyed. The motor pump assembly should
be supported on a generously sized foundation. This foundation must be completely flat, smooth and level. The unit shall
be tied to this foundation by means of suitable anchor bolts to avoid possible vibrations due to operation. The space
required for a pumping unit and the placement of anchor bolts are defined by the drawings supplied by the
manufacturer.
4.3 Alignment of the Axis
Regardless of whether they are direct coupled or belt driven, the pump and motor shaft must be precisely aligned.
4.4 Pipelines
For optimum operation of the pump-motor unit, the piping should not exert stresses on it, since the unit can deform,
misalign or break when the piping is not correctly aligned with the suction and discharge shafts of the pump. The
position of the flanges must be totally parallel, with their concentric axes, in order to minimize stresses in the pump
necks that deform the pump or produce a misalignment of axes. The bolts or studs must be able to pass loosely through
the holes in the flanges. Do not use the pump as an installation fastening point. The suction and delivery piping must not
cause stresses on the pump flanges that could exceed their maximum values. The piping should be fixed to the walls or
floors of the pump room in such a way that the pump is not subjected to the weight of the piping.
7
Figure 1. Typical flange arrangement
Transaction Information
4.5 Suction Conditions
The suction and discharge system should be adequately insulated to ensure cleanliness and maintenance of the pump
when required. The suction piping should be as short as possible and have few bends. The pipe diameter should be
calculated for the minimum slurry velocity thereby reducing head losses, but keeping the velocity above the settling
velocity of the solid particles.
When the diameter of the suction pipe is larger than that of the pump flange, a reduction should be used whose shape
avoids the formation of air bubbles that then enter the pump.
Transaction
Information
8
Pump Start
- Water pressure should be approximately 10 to 15 [psi] higher than pump discharge pressure.
- Clean water, free of impurities.
- Maintain system flow rates within the parameters given in Table 1.
Pump Start
Before putting a VOGT pump into operation for the first time, the following steps should be taken:
5.1 Water System Control Seal
Water System Control Seal
5.2 Axis Unlocking
In case the shaft becomes blocked during transport, use the shaft wrench to rotate the shaft manually in the direction
indicated on the pump housing.
5.3 Motor Rotation Control
With the motor and pump uncoupled, check that the pump rotates freely in the direction indicated on the pump casing,
otherwise the impeller could unscrew causing serious accidents.
5.4 Pump Start
The bearing carrier is supplied with an initial grease charge from the factory, therefore no additional grease should be
added at start-up.
The following graph establishes a comparison between typical times and temperature characteristics of a new grease
lubricated bearing carrier.
Table 1: Range of flow rates per installed bearing carrier
9
Pump Start
Initial Start-up
Next Starts
Figure 2. Time compared to temperature characteristics of a grease lubricated bearing assembly
The most common causes of high initial temperatures are:
-Excessive grease in bearings during initial start-up due to excessive relubrication.
-Belt drive tension is high for initial operation.
-Operation while idle state is indicated.
-Initial grease load is high to improve the chance of the bearings surviving the initial storage period.
!WARNING
-Do not add grease during start-up and initial operation.
-Check belt tension.
-Run the pump at the active operating point.
-According to the graph in figure 2, the temperature should not exceed a pick of 105°C, then wait approximately 4 hours
to cool it down and test it again. The pick should go down until it stabilizes.
If the assembly continues to heat up, recheck belt tension, operating point and speed. Check:
- Presence of solid particles inside. It is recommended to split the tests with water.
- Verify system pressure and flow.
Pump Start
10
Pump Start
NOTE
The equipment should operate by controlling the flow, discharge pressure and motor speed mentioned within the
operating curve of the equipment, based on this the pump should not work in a range less than 25% at the highest
efficiency point (BEP).
Prime the pump when it is to be put into operation.
The water leaking from the stuffing box is warmer than the water flowing through the pump due to the friction between
the jacket and the packing installed inside the system. If the water leakage through the stuffing box is very low and
causes smoke or steam, the pump should be stopped and its installation checked.
Abnormal start-up
If the pump does not prime, it may be due to one or more of the following causes:
- Pulp accumulation in the suction pipe.
- Air entering the packing press.
- Impeller blockage by oversize or oversize solid material (clogging).
- Blockage in the discharge duct either by oversize particles, flow velocity less than the settling velocity or by the
discharge angle of the line.
5.5 Shutdown Procedure
Before turning off the pump, you should let it run for a short period only with clean water to free the system of
impurities, then turn off the control panel equipment to finally and after a while at lower power stop the water system
seal.
Pump Start
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