Clz Series Marine Vertical Self-Priming Centrifugal Pump

• Customization: Available
• After-sales Service: Provide 24 - Hour Online Technical Support
• Warranty: Free Maintenance Within One Year
• Max.Head: 50-80m
• Max.Capacity: >400 L/min
• Driving Type: Motor
• Impeller Number: Single-Stage Pump
• Working Pressure: Middle Pressure Pump
• Influent Type of Impeller: Single Suction Pump
• Position of Pump Shaft: Horizontal Pump
• Pump Casing Combined: Horizontal Split Pumps
• Mounting Height: Since Irrigation Centrifugal Pumps
• Impeller: Closed
• Usage: Pump, Pumps
• Capacity M3/H: 10-250
• Head M: 16-32
• Speed R/Min: 2900
• Voltage: 380V
• Transport Package: Wooden Case Packaging
• Trademark: Cagon
• Origin: China
• HS Code: 8413709990
• Production Capacity: 1000PCS/Month

Product Description

CLZ series marine vertical self-priming centrifugal pump
CLZ series marine vertical self-priming centrifugal pumps are used at cabin bottom to cool water and fight fire.It is able to carry sea water under 70 degrees.Fresh water and other non-eroding liquid.


Main technical parameter

Type	(50Hz    3 φ 380v) main technical parameter					Motor type power        Kw		weight Kg
	Capacity m3/h	Head m	Speed r/min	NPSHr m	Shaft power kw
40CLZ-2	5	60	2900	3.5	3.9	Y132S1-2H	5.5	170
40CLZ-2A	4	54	2900	3.5	3.2	Y132S1-2H	5.5	170
40CLZ-4Z	5	32	2900	3.5	1.6	Y90L-2H	2.2	130
40CLZ-4AZ	5	22	2900	3.5	1.2	Y90S-2H	1.5	123
40CLZ-4ZS	5	32	2900	3.2	1.6	Y90L-2H	2.2
40CLZ-4AZS	5	22	2900	3.2	1.2	Y90S-2H	1.5
50CLZ-3	10	40	2900	3.2	3.4	Y112M-2H	4
50CLZ-4Z	20	50	2900	3.2	6.1	Y132S2-2H	7.5	175
50CLZ-4AZ	17	46	2900	3.2	5.0	Y132S2-2H	7.5	175
50CLZ-4.5Z	12.5	32	2900	3.2	2.5	Y112M-2H	4	153
50CLZ-4.5AZ	10	28	2900	3.2	1.8	Y100L-2H	3	144
50CLZ-6	20	32	2900	3.2	3.2	Y112M-2H	4	162
50CLZ-6S
50CLZ-6A	17	28	2900	3.2	2.5	Y112M-2H	4	162
50CLZ-6AS
50CLZ-7Z	12.5	20	2900	3.5	1.7	Y100L-2H	3	144
50CLZ-7AZ	10	17	2900	3.5	1.2	Y90L-2H	2.2	135
50CLZ-9Z	25	14.5	2900	3.5	1.7	Y100L-2H	3	144
65CLZ-3	25	85	2950	4	16	Y180M-2H	22
65CLZ-4	35	70	2950	3.2	13.9	Y160L-2H	18.5	438
65CLZ-4A	32	65	2950	3.2	12.1	Y160M2-2H	15	413
65CLZ-4B	20	60	2950	3.5	9.2	Y160M1-2H	11	398
65CLZ-5.5	35	50	2950	3.2	9.5	Y160M2-2H	15	413
65CLZ-5.5Z								293
65CLZ-5.5A	30	48	2950	3.2	8.2	Y160M1-2H	11	408
65CLZ-5.5AZ								288
65CLZ-5.5BZ	25	45	2900	3.2	6.4	Y132S2-2H	7.5	258
65CLZ-6	25	32	2900	3.2	4.2	Y132S1-2H	5.5	240
65CLZ-6S								190
65CLZ-6ZS								176
65CLZ-6A	21	28	2900	3.2	3.1	Y112M-2H	4	212
65CLZ-6AS								164
65CLZ-6AZS								150
65CLZ-8	35	32	2900	3.2	5.6	Y132S2-2H	7.5	265

Type	(50Hz    3 φ 380v) main technical parameter					Motor type power        Kw		weight Kg
	Capacity m3/h	Head m	Speed r/min	NPSHr m	Shaft power kw
65CLZ-8A	32	28	2900	3.2	4.5	Y132S1-2H	5.5	260
65CLZ-9Z	25	20	2900	3.5	2.3	Y100L-2H	3	144
65CLZ-9AZ	21	17	2900	3.5	1.6	Y90L-2H	2.2	135
80CLZ-3	50	120	2950	3.5	35.5	Y225M-2H	45	668
80CLZ-3A	45	110	2950	3.5	29.3	Y200L2-2H	37	583
80CLZ-4	50	80	2950	3.5	21.8	Y200L1-2H	30	485
80CLZ-4A	50	70	2950	3.5	19.5	Y180M-2H	22	450
80CLZ-4B	45	62	2950	3.5	16.2	Y160L-2H	18.5	420
80CLZ-6	50	50	2950	3.5	11.7	Y160M2-2H	15	372
80CLZ-6A	45	48	2950	3.5	10.3	Y160M2-2H	15	372
80CLZ-6B	40	42	2950	3.8	8.5	Y160M1-2H	11	346
80CLZ-6BS
80CLZ-9	50	32	2950	3.5	7.2	Y160M1-2H	11	345
80CLZ-9A	45	28	2900	3.5	5.6	Y132S2-2H	300	300
80CLZ-9B	54	21	2900	3.5	5.1	Y132S2-2H	7.5	327
80CLZ-9Z	50	32	2950	3.5	7.9	Y160M1-2H	11
80CLZ-9AZ	45	28	2900	3.5	6.2	Y132S2-2H	7.5
80CLZ-9BZ	54	21	2900	3.5	5.6	Y132S2-2H	7.5
80CLZ-9ZS	50	32	2950	3.5	7.9	Y160M1-2H	11
80CLZ-9AZS	45	28	2900	3.5	6.2	Y132S2-2H	7.5
80CLZ-9BZS	54	21	2900	3.5	5.6	Y132S2-2H	7.5
80CLZ-13	45	21	2900	4.5	4.6	Y132S1-2H	5.5	195
80CLZ-13Z	45	21	2900	4.5	4.6	Y132S1-2H	5.5
80CLZ-14S	60	20	2900	4.0	5.8	Y132S2-2H	7.5	316
100CLZ-5	100	120	2950	4.5	62.8	Y280S-2H	75	880
100CLZ-5A	95	110	2950	4.5	55.8	Y280S-2H	75	880
100CLZ-5B	80	100	2950	4.5	43.6	Y250M-2H	55	738
100CLZ-5C	75	95	2950	4.5	39.6	Y225M-2H	45	668
100CLZ-6	80	80	2950	4.0	34.2	Y200L2-2H	37	591
100CLZ-6A	72	75	2950	4.5	29.4	Y200L2-2H	37	591
100CLZ-6B	75	62	2950	4.5	26.4	Y200L1-2H	30	561
100CLZ-6.5	100	80	2950	4.5	39.6	Y225M-2H	45	668
100CLZ-6.5A	95	75	2950	4.5	35.9	Y225M-2H	45	668
100CLZ-8	80	50	2950	4.0	18.8	Y180M-2H	22	470
100CLZ-8A	72	46	2950	4.0	15.8	Y160L-2H	18.5	445
100CLZ-9	100	50	2950	4.5	22.0	Y200L1-2H	30	510

Type	(50Hz    3 φ 380v) main technical parameter					Motor type power        Kw		weight Kg
	Capacity m3/h	Head m	Speed r/min	NPSHr m	Shaft power kw
100CLZ-9A	95	46	2950	4.5	19.5	Y180M-2H	22	470
100CLZ-12	80	32	2950	4.0	11.6	Y160M2-2H	15	420
100CLZ-12A	72	28	2950	4.0	9.3	Y160M1-2H	11	405
100CLZ-13	100	32	2950	4.8	13.8	Y160L-2H	18.5	445
100CLZ-13A	95	28	2950	4.8	11.7	Y160M2-2H	15	420
100CLZ-17	80	20	2950	4.0	7.3	Y160M1-2H	11	405
100CLZ-18.5	100	20	2950	4.8	9.1	Y160M1-2H	11	405
100CLZ-18.5A	95	18	2950	4.8	8.0	Y160M1-2H	11	405
125CLZ-6	160	120	2950	5.2	95.1	Y315S-2H	110
125CLZ-6A	150	110	2950	5.2	83.2	Y315S-2H	110
125CLZ-6B	140	110	2950	5.2	77.1	Y280M-2H	90
125CLZ-8	160	80	2950	5.2	60.1	Y280S-2H	75
125CLZ-8A	150	75	2950	5.2	52.8	Y280S-2H	75
125CLZ-8B	140	68	2950	5.2	48.7	Y250M-2H	55	742
125CLZ-8/2	70/112	70/25	1480	4.1		Y180M-4H	45
125CLZ-9/2	116/58	24/61	1480	4.1		Y180M-2H	22
125CLZ-12	160	50	2950	5.2	35.1	Y225M-2H	45	672
125CLZ-12A	150	46	2950	5.2	30.8	Y200L2-2H	37	587
125CLZ-16.5	160	32	2950	5.2	22.1	Y200L1-2H	30	557
125CLZ-16.5A	150	28	2950	5.2	18.4	Y180M-2H	22	522
125CLZ-23.5	160	20	2950	5.2	15.2	Y160L-2H	18.5	502
125CLZ-23.5A	150	18	2950	5.2	12.9	Y160M2-2H	15	477
150CLZ-12/2	224/70	25/70	1480	4.1		Y250M-2H	55
150CLZ-14	250	50	2950	6.0	53.2	Y280S-2H	75	913
150CLZ-14A	240	46	2950	6.0	47.7	Y250M-2H	55	778
150CLZ-17.5	188	33	2950	6.5	26.8	Y200L1-2H	30	593
150CLZ-21	250	32	2950	6.0	33.5	Y225M-2H	45	730
150CLZ-21A	240	28	2950	6.0	28.2	Y200L2-2H	37	645
200CLZ-12	300	30	1480	5.5	40.9	Y225M-4H	45	808
200CLZ-12A	280	25	1480	5.5	32.9	Y225S-4H	37	774
200CLZ-24.5	450	15	1480	6.0	34.0	Y225S-4H	37	774

Performance and parameter table for the power supply frequency of 60Hz 3 φ 440v    (continued):

Type	(60Hz    3 φ 440v) main technical parameter					Motor type power        Kw		weight Kg
	Capacity m3/h	Head m	Speed r/min	NPSHr m	Shaft power Kw
40CLZ1-2	6	85	3550	4	6.6	Y160M1-2H	11
40CLZ1-2A	5	78	3500	4	5.5	Y132S2-2H	7.5
40CLZ1-4Z	6	46	3500	4	2.8	Y112M-2H	4
40CLZ1-4AZ	6	32	3500	4	2.1	Y100L-2H	3
50CLZ1-4Z	24	72	3550	4	10.5	Y160M2-2H	15
50CLZ1-4AZ	20	65	3550	4	8.2	Y160M1-2H	11
50CLZ1-4.5Z	15	45	3500	4	4.3	Y132S1-2H	5.5
50CLZ1-4.5AZ	12	40	3500	4	3.1	Y112M-2H	4
50CLZ1-6	24	45	3500	4	5.5	Y132S2-2H	7.5
50CLZ1-6S
50CLZ1-6A	20	40	3500	4	4.2	Y132S1-2H	5.5
50CLZ1-6AS
50CLZ1-7Z	15	29	3500	4	3.0	Y112M-2H	4
50CLZ1-7AZ	12	25	3500	4	2.1	Y100L-2H	3
50CLZ1-9Z	30	21	3500	4	2.9	Y112M-2H	4
65CLZ1-4	42	100	3580	4	23.9	Y200L1-2H	30
65CLZ1-4A	38	93	3580	4	20.5	Y200L1-2H	30
65CLZ1-4B	24	86	3550	4	15.6	Y180M-2H	22
65CLZ1-5.5	42	72	3550	4	16.5	Y180M-2H	22
65CLZ1-5.5A	36	69	3550	4	14.1	Y160L-2H	18.5
65CLZ1-5.5BZ	30	64.8	3550	4.5	11.1	Y160M2-2H	15
65CLZ1-6	30	45	3550	4	7.1	Y160M1-2H	11
65CLZ1-6S
65CLZ1-6ZS
65CLZ1-6A	25	40	3500	4	5.3	Y132S2-2H	7.5
65CLZ1-6AS
65CLZ1-6AZS
65CLZ1-8	42	45	3550	4	9.4	Y160M2-2H	15
65CLZ1-8A	38	40	3550	4	7.7	Y160M1-2H	11
65CLZ1-9Z	30	29	3500	4.2	4.0	Y132S1-2H	5.5
65CLZ1-9AZ	25	25	3500	4.2	3.0	Y112M-2H	4
80CLZ1-4	60	115	3580	4.2	37.6	Y225M-2H	45
80CLZ1-4A	60	100	3580	4.2	33.4	Y200L2-2H	37
80CLZ1-4B	54	89	3580	4.2	27.9	Y200L2-2H	37
80CLZ1-6	60	72	3580	4.2	20.3	Y200L1-2H	30

Type	(60Hz    3 φ 440v) main technical parameter					Motor type power        Kw		weight Kg
	Capacity m3/h	Head m	Speed r/min	NPSHr m	Shaft power Kw
80CLZ1-6A	54	69	3550	4.2	17.8	Y180M-2H	22
80CLZ1-6B	48	60	3550	4.5	14.5	Y160L-2H	18.5
80CLZ1-9	60	45	3550	4.2	11.9	Y160M2-2H	15
80CLZ1-9A	54	40	3550	4.2	9.6	Y160M2-2H	15
80CLZ1-9B	65	30	3550	4.2	8.9	Y160M1-2H	11
80CLZ1-9Z	60	45	3550	4.2	13.6	Y160L-2H	18.5
80CLZ1-9AZ	54	40	3550	4.2	10.7	Y160M2-2H	15
80CLZ1-9BZ	65	30	3550	4.2	9.7	Y160M2-2H	15
80CLZ1-9ZS	60	45	3550	4.2	13.6	Y160L-2H	18.5
80CLZ1-9AZS	54	40	3550	4.2	10.7	Y160M2-2H	15
80CLZ1-9BZS	65	30	3550	4.2	9.7	Y160M2-2H	15
80CLZ1-13	54	30	3550	5	8	Y160M1-2H	11
80CLZ1-13Z	54	30	3550	5	8	Y160M1-2H	11
80CLZ1-14S	72	28	3550	4.5	9.8	Y160M2-2H	15
100CLZ1-6	95	115	3580	4.5	58.3	Y280S-2H	75
100CLZ1-6A	85	108	3580	5	50	Y250M-2H	55
100CLZ1-6B	90	89	3580	5	45.4	Y250M-2H	55
100CLZ1-6.5	120	115	3580	5	68.3	Y280M-2H	90
100CLZ1-6.5A	114	108	3580	5	62.1	Y280S-2H	75
100CLZ1-8	95	72	3580	4.5	32.1	Y200L2-2H	37
100CLZ1-8A	85	65	3580	4.5	26.4	Y200L2-2H	37
100CLZ1-9	120	72	3580	5	38.0	Y225M-2H	45
100CLZ1-9A	114	65	3580	5	33.1	Y225M-2H	45
100CLZ1-12	95	45	3580	4.5	19.4	Y200L1-2H	30
100CLZ1-12A	85	40	3550	4.5	15.7	Y160L-2H	18.5
100CLZ1-13	120	45	3580	5.3	23.3	Y200L1-2H	30
100CLZ1-13A	114	40	3580	5.3	20	Y200L1-2H	30
100CLZ1-17	95	28	3550	4.5	12.1	Y160M2-2H	15
100CLZ1-18.5	120	28	3550	5.3	15.3	Y180M-2H	22
100CLZ1-18.5A	114	25	3550	5.3	13.4	Y160L-2H	18.5
125CLZ1-8	192	115	3580	6.5	103.7	Y315M-2H	132
125CLZ1-8A	180	108	3580	6.5	91.3	Y315S-2H	110
125CLZ1-8B	180	95	3580	6.5	81.7	Y280M-2H	90
125CLZ1-12	192	72	3580	5.8	60.7	Y280S-2H	75
125CLZ1-12A	180	65	3580	5.8	52.2	Y280S-2H	75
125CLZ1-16.5	192	45	3580	5.8	37.4	Y225M-2H	45

Type	(60Hz    3 φ 440v) main technical parameter					Motor type power        Kw		weight Kg
	Capacity m3/h	Head m	Speed r/min	NPSHr m	Shaft power Kw
125CLZ1-16.5A	180	40	3580	5.8	31.6	Y200L2-2H	37
125CLZ1-23.5	192	28	3580	5.8	22.5	Y200L1-2H	30
125CLZ1-23.5A	180	25	3580	5.8	19.2	Y200L1-2H	30
150CLZ1-14	300	72	3580	7	91.9	Y315S-2H	110
150CLZ1-14A	288	66	3580	7	82.2	Y280M-2H	90
150CLZ1-17.5	225	47	3580	7	46.3	Y250M-2H	55
150CLZ1-21	300	46	3580	7	57.8	Y280S-2H	75
150CLZ1-21A	288	40	3580	7	48.3	Y250M-2H	55
200CLZ1-12	360	43	1780	6.5	70.3	Y280M-4H	90
200CLZ1-12A	336	36	1780	6.5	56.8	Y280S-4H	75
200CLZ1-24.5	500	26	1780	7	57.2	Y280S-4H	75

Our History

Hangzhou Cagon Transmission Technology Co., Ltd. is well-known in the shipbuilding

field. It is a highly recognized ship power system integrator, top manufacturer and

professional service provider in the industry. In the marine sector, it is a well-deserved

leader in external fire protection and anti-corrosion engineering. Since its inception, the

company has been committed to the passion and determination to deepen its presence

in the shipbuilding industry, anchored on the goal of "one-stop service", and made every

effort to create a power system overall solution that meets the diverse needs of users. At

the same time, it focuses on the cutting-edge needs of marine equipment, ingeniously

develops new anti-corrosion coatings, and uses superb engineering construction skills to

protect the quality of marine equipment in all aspects

 

 

OurProduct

OurProductsincludesthefollowing:

MarineTransmission

MarineDieselEngine

Marine/ShipPropellers

Marine/ShipGearBox

MarineFire-FightingPumps

HighPrecisionReducer

BoatEngine&TransmissionRepairs

ShipPowerSystemModifications

SolutionsforMarinePropulsionSystems

TransmissionDeviceforAgriculturalMachinery

TransferCase(ForAutomobiles)

TransferCaseforIndustrialTransmission

 

ProductApplication

Productuse:

CargoShip,Containerships,BulkCarriers,TankerVessels,ReeferVessels,Offshore

Vessels,PassengerVessels,NavalShips,,FishingVessels,ResearchVessels

Grain-harvestingmachinery,corn-harvestingmachinery,balers,knotters,film-

wrappingmachines,paddy-fieldsprayers,orchardsprayers,etc.Trucks,off-road

vehicles,lorries,constructionvehicles.Engineeringandindustrialfields.

Relevantqualifications

 

ProductionEquipment

Boxprocessing:

Patentedappearance,beautifulandcompact;

Precisioncastingofresinsandmetalmoldtoensurestrengthandnoleakage;

One-timeclampingandprocessinginthemachiningcenter,usingimportedCNC

machiningcentertoensuremachiningaccuracy;

Double-processprofessionalcleaningandphosphatingequipment,cleaning(removing

ironchips),andrust(corrosion)prevention.

Gearproductionline:

Gears(axles)usepreheatingtreatmentprocess

Usehigh-qualitylow-carbonalloysteelforcarburizingandquenchingtoensure

strength

Useturningcenter,CNChigh-speedgearhobbingmachine,CNCforminggeargrinding

machineforprocessingtoensureaccuracy

Gearsuseproprietaryshapingandnoisereductiontechnology

Usecleaningandphosphatinglineforcleaningandcorrosionprotection

Heattreatmentprocessing:

Pre-heattreatmentprocessisusedtoensurethestabilityofmaterialstructure;

Fullyenclosedheattreatmentmulti-purposefurnaceisusedtoensurehardnessand

strengthandeffectivelycontroldeformation;

Strongshotpeeningtechnologyisusedtoincreasestressandeffectivelyimprovethe

bendingstrengthoftoothrootbymorethan20%

Assemblyline:

Station-typeflexibleassemblyline;

Circularchainspraydryingline;

CNCdoublemeshinginstrumentassemblyfullinspection;

100%onlineproductoperationinspection

Test machine ensure high quality goods



OverallSolutionforShipPropulsionSystem

Shiptype:scientificresearchship

Shiplength:37meters

Shipwidth:7.8meters

Designeddraft:2.0meters

Designedspeed:12knots

Lubricationmethod:Oillubrication

Propulsionmethod:Singleenginesinglepropelleradjustablepropeller

Shipowner:ZhejiangOceanUniversity

Shipyard:QingdaoGeshidaShipbuildingCo.,Ltd.

Shiptypefeatures:Thisshipisascientificresearchship.Thepropellerbladesarespecially

designedaccordingtothedifferentspeedsrequiredbydifferentscientificresearchmodes,

andadvancedHFseriespropellerhubsareused.Forthisproject,weprovideacomplete

setofshippropulsionsystemsincludingmainengine,gearbox,shaftgenerator,high

elasticcoupling,shaftsystemandanalysis,sterntube,adjustablepropeller,remote

controlsystem,hydraulicsystem,etc.

Brief Introduction to Antirust Material Spray Painting Technology
 

Characteristics of the protective coating formed by this technology

 

1. Excellent adhesion between the coating and the metal substrate.
2. Wide applicable temperature range.
3. Good cathodic disbondment resistance, free of the "cathode screening" effect.
4. Stable electrical insulation to reduce cathodic protection current.
5. Resistant to chemical media corrosion, with good resistance to Cl
6. Similar thermal expansion coefficients of the coating and the steel structure, with good resistance to thermal changes.
7. The coating is easy to repair.

Main performance indices of this technology

 

1. Peak performance of the KsF series coatings: bond strength 100MPa, impact strength > 23J, anti - penetration property at 60ºC (within one year) with the coating resistance remaining constant.
2. Long - distance pipelines can be coated both inside and outside simultaneously, with performance meeting the national anti - corrosion coating standards for fusion - bonded epoxy powder coatings or SY/T0315 - 97 Technical Standard of Fusion Bond Epoxy Coating for Steel Pipeline.
3. Bends of long - distance pipelines can be coated both inside and outside simultaneously, with performance meeting the national anti - corrosion coating standards for fusion - bonded epoxy powder coatings or Q/Fs.J02.15 - 1996 enterprise standard.
4. The drag - reduction coating performance for long - distance pipelines meets the US standard APIRP5L2.
5. The field joint coating performance for long - distance pipelines meets the national anti - corrosion coating standards for fusion - bonded epoxy powder coatings.

Application fields of this technology

 

1. Products for severe corrosion protection, such as high - efficiency corrosion - resistant pumps, wear - resistant pumps, high - efficiency corrosion - resistant fans, corrosion - resistant valves, corrosion - resistant bellows compensators, and seawater filters.
2. Severe corrosion protection for long - distance pipelines of oil, gas, and water.
3. Severe corrosion protection for metal process pipelines of acids, alkalis, and salts.
4. Severe corrosion protection for equipment and structural parts in the chemical engineering and energy industries.
5. Severe corrosion protection for materials in ocean engineering.

Application examples of this technology

 

1. Qinshan Nuclear Power Station
   • Primary loop seawater pump: 20SHF - 19 seawater pump, flow rate 1400m³/h, head 23m, speed 978r/min, 4 sets.
   • Seawater booster pump: 14SH - 90 - 19 seawater pump, speed 1450r/min, 3 sets.
   • Underground seawater pipeline: 4 φ1400 pipelines, about 30m.
   • Bellows expansion joint: 8 units, φ1400×1.2m.
   • Seawater cooling pipe in the steam turbine building: seawater booster pump outlet pipe φ600×12m and tees, tee joints of φ325 - φ525mm, totally 260m.
2. Shenyang Automation Research Institute, Chinese Academy of Sciences
   Key parts of the underwater robot developed by the institute, such as underwater motors, underwater manipulator oil cylinders, and underwater tools, adopted the special KsF coating technology and were successfully used on Nanhai drilling platform Exploration 3 of China West Petroleum Company.

Effect of KsF spray - painting anticorrosion technology on marine pumps

Factory seawater simulation test:
Two 50cL - 30 marine vertical centrifugal pumps were used for the contrast test. The base material of their main parts was the same (cast silicon brass, ZCuZn16Si4). One pump's body, cover, impeller, and gland were treated with KsF severe - corrosion - protection spraying (average coating thickness 0.45mm), and the other was not. The test medium was simulated seawater (11.62kg sea salt added to 0.33m³ fresh water, weight ratio 3.52%). The unpainted pump started the test on September 14, 2004, and the painted one on October 14, 2004, with continuous 24 - hour operation required.
The two pumps were disassembled for the first check on December 2, 2004, reassembled, and continued the test. On March 7, 2005, By then, the unpainted pump had run for 4000h and the painted one for 3380h. The inspection results were as follows:
 

1. No mechanical seal leakage, abnormal vibration, or noise occurred during the operation of the two pumps.
2. The impeller rings and seal rings of the two pumps had slight normal wear.
3. The rubbing surfaces of the mechanical seals of the two pumps had normal wear.
4. The coating surface of the painted pump's body, cover, impeller, and gland was smooth and intact, with no seawater corrosion, coating wear, or peeling. In contrast, the surface of the unpainted pump's body, cover, and impeller had corrosion, which was significantly aggravated compared to the first check.

picture of body, cover and impeller of the painted pump after test






picture of body, cover and impeller of the unpainted pump after test


 

Centrifugal Pump Operation Manual: 

 

1. Fundamental Operating Principle

Centrifugal pumps convert rotational energy from an impeller into kinetic energy, generating centrifugal force to move fluids. Proper selection and operation depend on understanding this hydrodynamic principle and its relationship to pump performance curves.

2. Pump Selection Criteria

Key parameters for centrifugal pump specification include:

• Flow Rate (Q) - Required volumetric capacity (m³/h or GPM)

• Total Dynamic Head (TDH) - Net pressure differential accounting for static lift, friction losses, and system resistance

• Fluid Properties - Viscosity, specific gravity, temperature, and chemical compatibility with wetted materials

• Net Positive Suction Head (NPSH) - Critical to prevent cavitation (NPSH> NPSH+ safety margin)

3. Pre-Installation Requirements

• Foundation - Rigid mounting base with vibration-damping provisions (grouted sole plates or isolation pads)

• Alignment - Laser-aligned shaft coupling within 0.05mm tolerance (per ANSI/HI standards)

• Piping -

  • Suction line: Short, straight runs with eccentric reducers (flat-top orientation)

  • Discharge: Install check valve and isolation gate valve

  • Support independent piping loads to prevent nozzle strain

4. Operational Monitoring Protocols

Parameter	Normal Range	Corrective Action if Deviated
Discharge Pressure	±10% of BEP	Check for clogging/valve position
Bearing Temp	<70°C (158°F)	Relubricate or replace bearings
Vibration Velocity	<4.5 mm/s RMS (ISO 10816)	Verify alignment/impeller balance
Current Draw	Within motor nameplate	Assess fluid density/motor condition

5. Preventive Maintenance Program

• Daily:

  • Inspect mechanical seal/gland packing for leaks

  • Monitor lube oil levels (oil-lubricated bearings)

  • Log pump performance metrics

• Monthly:

  • Grease bearings (quantity per OEM specs)

  • Flush seal chambers on abrasive services

  • Conduct motor megohm testing

• Annual:

  • Replace wear rings if clearance exceeds 0.5mm

  • Perform dynamic balancing (ISO 1940 G6.3 standard)

  • Hydrotest casing at 1.5x design pressure

6. Advanced Troubleshooting Guide

Symptom	Root Cause	Resolution
No liquid delivery	Priming failure/NPSH deficiency	Vent air, elevate suction source
Excessive noise	Cavitation or bearing failure	Increase NPSH, replace bearings
Seal leakage >5 drops/min	Seal face wear or misalignment	Reface/seal replacement, realign
Power surge	Impeller blockage	Disassemble and clean flow passages