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Introduction
BHEL,
Hyderabad is India's major supplier of power station pumps
for various applications like boiler Feed Booster, Condensate
Extraction and circulating water. These feed pumps are manufactured
in collaboration with M/s Sigma Lutin, Czechoslovakia and
weir pumps Limited, U.K.
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In
order to ensure the continued satisfaction of customers regarding
the performance of BHEL pumps, full fledged prototype testing
facilities have been installed at BHEL , Hyderabad. The pump
testing facilities of BHEL, Hyderabad are unique in the country
and are comparable to that of any world class test station.
The tests cover full range of operations on all prototypes.
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| TESTS
CONDUCTED |
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The
following tests, conforming to international standards are
generally conducted at the works.
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| ROUTINE
TESTS ON ALL PUMPS |
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These
tests are conducted on each and every pump.
a) Balancing quality check for rotating parts.
b) Mechanical performance test on prototype pumps to check
temperature rise and housing vibrations of bearings and external
leakages from stationary and rotating seal faces.
c) Hydraulic performance test to cover complete range of operations
on prototype pumps to check:
Flow Vs Head characteristic
Flow Vs Power characteristic
Flow Vs Efficiency characteristic.
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| TYPE
TESTS AS OPTIONAL |
These
tests are conducted only when specially agreed upon.
a) NPSH test for 1% and 3% Head break down. |
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| SPECIAL
TESTS ON BOILER FEED PUMPS |
a)
Hot water performance test.
b) Combined string test.
c) Axial thrust measurements.
d) Pressure pulsation tests.
e) Dry run test.
f) Thermal shock test.
g) Visual Cavitation test ( at BHOPAL). |
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| TESTING
FACILITIES |
- DYNAMIC
BALANCING FACILITY UP TO JOB WEIGHT OF 4000KGs.
- FACILITY
FOR TESTING OF BFPs UPTO 1500 m3 / hr FLOW & 220 bar Discharge
pressure.
- FACILITY
FOR TESTING OF BOOSTER PUMPS UPTO 1500m3 / hr FLOW AND 25
bar DISCAHRGE PRESSURE.
- FACILITY
FOR TESTINGOF CEPs UPTO 1500 m3 /hr FLOW & 40 bar Discharge
pressure.
- FACILITY
FOR TESTING OF CWPs UPTO 33000m3 / hr FLOW & 7 bar DISCHARGE
PRESSURE.
- ELECTRICAL
DRIVE FACILITIES UPTO 10000 kw ON 11kv, UPTO 3500 kw ON
6.6 kv, upto 1100 KW ON3.3 KV & UPTO 400 KW ON 415 VOLTS
SUPPLY.
- CLOSED
LOOP HOT WATER TEST FACILITY AND THERMAL SHOCK TEST FACILITY.
- FACILITY
FOR NPSH TESTING OF FIRST STAGE IMPELLER FOR CEP UPTO 1500
m3/hr FLOW AT SPECIFIED TEMPERATURE
- DATA
ACQUISITION SYSTEM AND STATE OF THE ART INSTRUMENTATION
FOR AUTOMATED TESTING OPERATIONS.
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| INTERNATIONAL
STANDARDS FOR POWER STATION PUMPS |
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Various
International Standards are in vogue for the guidance of a
pump manufacturer to conduct the routine as well as type tests.Prominent
Test standards are:
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- ASME
PTC-8.2 (1990)
- HYDRAULIC
INSTITUTE STANDARDS ( 14th Edition-1983 )
- APT
- 610, 8th Edition - 1995
- ANSI
- HI 1.6 ( 1994)
- BS
- 5316 PART - 1 (ALSO ISO -2548)
- BS
- 5316 PART -2 (ALSO ISO -3555)
- ISO
-9906 1st Edition ( 1999)
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