Model NO.:

CIS marine horizontal centrifugal pump

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

Trademark:

Cagon

Transport Package:

Wooden Case Packaging

Origin:

China

HS Code:

8413709990

Product Description

CWL series marine horizontal centrifugal pump

CWL series marine horizontal centrifugal pumps are used for ship fire control, cooling, and sanitation systems. They also find applications in industries, urban water supply and drainage, as well as agricultural and orchard irrigation

main technical parameter

Type	(50Hz 3 φ 380V) main technical parameter					Motor type power Kw		Weight Kg
Type	Capacity m3/h	Head m	Speed r/min	NPSHr m	Shaft power kW	Motor type power Kw		Weight Kg
32CWL-2	5	60	2900	3.5	3.3	Y112M-2H	4
32CWL-4	2	20.2	2900	4.2		Y802-2H	1.1	62
	4	21		4.1	0.74
	4.8	20.9		4.1
32CWL-3	2	31	2900	3.0		Y90S-2H	1.5	60
	4	30		2.5	0.99
	4.8	29.2		2.8
40CWL-5	4	22.2	2900	4.4		Y802-2H	1.1	50
	8	21		3.0	0.85
	9.6	20		3.1
40CWL-4	4	32.3	2900	3.6		Y90L-2H	2.2	65
	8	30		2.6	1.31
	9.6	28.5		2.5
40CWL-3	4	43	2900	3.0		Y100L-2H	3	87
	8	42		2.5	2.13
	9.6	41		2.9
50CWL-6	6	22.2	2900	2.8		Y90S-2H	1.5	60
	12	21		2.0	1.16
	14.4	19.8		3.0
50CWL-4.5	6.0	31.5	2900	6.0		Y100L-2H	3	82
	12	30		3.6	1.78
	14.4	28.0		3.3
50CWL-4	6	43.7	2900	2.8		Y112M-2H	4	101
	12	42		3.4	2.75
	14.4	40.4		4.1
50CWL-8	16.5	22.8	2900	2.2		Y100L-2H	3	95
	21	21		2.2	1.91
	25.2	19		2.6
50CWL-7	10.5	33.6	2900	2.2		Y112M-2H	4	95
	21	30		2.4	2.72
	25.2	27		2.9
50CWL-5	10.5	45.5	2900	5		Y132S1-2H	5.5	125
	21	42		2.8	4.07
	25.2	39.5		3.1
50CWL-3.5	10.5	64	2900	1.8		Y132S2-2H	7.5	134
	21	60		2.3	6.24
	25.2	57		2.9
65CWL-11	17.5	23.7	2900	3.5		Y112M-2H	4	96
	35	21		3.8	2.78
	42	19.4		4
65CWL-8	17.5	33	2900	2.2		Y132S1-2H	5.5	118
	35	30		2.4	4.08
	42	28		2.7
65CWL-6	17.5	45.2	2900	2.8		Y132S2-2H	7.5	131
	35	42		2.5	5.98
	42	38.2		2.8
65CWL-5	17.5	64	2950	2.8		Y160M1-2H	11
	35	60		2.5	9.08
	42	57		2.8

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
80CWL-14	30	23	2900		3.7		Y132S1-2H	5.5	135
	60	21			3.7	4.4
	72	19.7			3.8
80CWL-14A	28	20.4	2900		3.7		Y132S1-2H	5.5	135
	56	18.5			3.7	3.71
	67.2	17.5			3.8
80CWL-11	30	34.5	2900		2.2		Y132S2-2H	7.5	132
	60	30			2.9	6.54
	72	27.2			3.6
80CWL-11A	28.5	31	2900		2.2		Y132S2-2H	7.5	132
	57	27			2.9	5.74
	68.4	24.5			3.6
80CWL-8	30	45	2950		3.7		Y160M1-2H	11	192
	60	42			3.2	9.4
	72	38.8			3.1
80CWL-8A	28	40	2950		3.7		Y160M1-2H	11	192
	56	37.6			3.2	8.07
	68.2	34.5			3.1
80CWL-6	30	67.7	2950		2.8		Y160L-2H	18.5	224
	60	60			2.3	14.21
	72	54.4			2.7
80CWL-5.5	30	77.3	2950		2.6		Y180M-2H	22	260
	60	75			2.6	17.26
	72	73			2.8
80CWL-5.5A	28.4	69.4	2950		2.6		Y160L-2H	18.5	260
	56.8	67.3			2.6	14.8
	68	65.5			2.8
100CWL-18	50	24.4	2950		3.6		Y160M1-2H	11	196
	100	21			4.3	7.33
	120	17.8			4.9
100CWL-18A	48.2	22.7	2900		3.6		Y132S2-2H	7.5	154
	96.4	19.5			4.3	6.82
	115.6	16.5			4.9
100CWL-14	50	33.7		2950	2.5		Y160M2-2H	15	213
	100	30			3.3	10.47
	120	27.5			3.8
100CWL-14A	47.6	30.5		2950	2.5		Y160M1-2H	11	213
	95.2	27.1			3.3	9.24
	114	24.9			3.8
100CWL-11	50	46.8		2950	2.5		Y160L-2H	18.5	242
	100	42			3.2	14.85
	120	37.5			3.7
100CWL-11A	46.8	41		2950	2.5		Y160M2-2H	15	242
	93.6	36.9			3.2	12.54
	112	32.9			3.7
100CWL-8	50	64.8		2950	3.0		Y200L1-2H	30	255
	100	60			3.7	21.79
	120	57			4.5

Type	(50Hz 3 φ 380v) main technical parameter					Motor type power Kw		Weight Kg
Type	Capacity m3/h	Head m	Speed r/min	NPSHr m	Shaft power kW	Motor type power Kw		Weight Kg
100CWL-8A	47	57.5	2950	3.0		Y180M-2H	22	255
	94	53.2		3.7	18.66
	112.8	50.6		4.5
100CWL-6	50	97	2950	2.6		Y225M-2H	45	430
	100	85		3.7	32.15
	120	71.5		4.6
100CWL-6A	47	86	2950	2.6		Y200L2-2H	37	350
	94	75.4		3.7	27.6
	112.8	63.4		4.6
150CWL-16	80	15.6	1480	2.8		Y160M-4H	11	250
	160	13		3.0	6.75
	192	11.2		3.4
150CWL-12	160	20	1480	4	11	Y160L-4H	15
150CWL-9	160	30	1480	4	16.97	Y180L-4H	22
150CWL-6	160	45	1480	5	26.85	Y225S-4H	37
200CWL-21	280	13	1480	4	12.08	Y160L-4H	15
200CWL-15	280	20	1480	4	18.59	Y180L-4H	22
200CWL-9	280	45	1480	5	43.42	Y250M-4H	55
200CWL-12	150	32.5	1480	1.9		Y225S-4H	37	475
	300	30		3.1	31.4
	360	28.3		3.7
200CWL-18	200	23.8	1480	2.3		Y225S-4H	37	550
	400	21		4.0	27.23
	480	16.8		4.5
250CWL-29	500	13	1480	5	21.32	Y200L-4H	30
250CWL-21	250	23.2	1480			Y225M-4H	45
	500	20		4.5	32.8
	600	15.5
250CWL-15	500	30	1480	5	49.2	Y250M-4H	55
250CWL-11	500	45	1480	6	73.8	Y280M-4H	90
300CWL-35	792	8	980	4.5		Y200L2-6H	22
350CWL-40	900	9.4	980	4.5	27.1	Y225M-6H	30
400CWL-30	1400	9.5	730	4	43	Y315S2-8H	55
600CWL-31	3400	23	980	7.5	250.4	Y355L2-6H	280

Performance parameters when power frequency is 60Hz

Type	(60Hz 3 φ 440v) main technical parameter					Motor type power Kw		Weight Kg
Type	Capacity m3/h	Head m	Speed r/min	NPSHr m	Shaft power kW	Motor type power Kw		Weight Kg
32CWL1-2	6	85	3500	4	5.8	Y132S2-2H	7.5
32CWL1-4	2.4	29	3500	5.6		Y90L-2H	2.2	72
	4.8	30.2		5.4	0.81
	5.7	29.5		5.4
32CWL1-3	2.4	44.6	3500	4.0		Y90L-2H	2.2	75
	4.8	43.2		3.3	0.81
	5.7	42		3.7
40CWL1-5	4.8	31.9	3500	5.8		Y90L-2H	2.2	60
	9.6	30.2		4.0	1.46
	11.5	28.8		4.9
40CWL1-4	4.8	46.5	3500	4.8		Y100L-2H	3	77
	9.6	43.2		3.5	2.26
	11.5	41		3.3
40CWL1-3	4.8	61.5	3500	4.0		Y132S1-2H	5.5	142
	9.6	60		3.3	3.64
	11.5	59		3.9
50CWL1-6	7.2	31.8	3500	3.7		Y100L-2H	3	75
	14.4	30.2		2.7	2
	17.3	28.5		4.0
50CWL1-4.5	7.2	45	3500	8.0		Y112M-2H	4	97
	14.4	43.2		4.8	3.08
	17.3	40		4.4
50CWL1-4	7.2	62.5	3500	3.7		Y132S1-2H	5.5	126
	14.4	60.4		4.5	4.74
	17.3	58		5.5
50CWL1-8	12.6	32.5	3500	2.9		Y112M-2H	4	90
	25.2	30.2		2.9	3.29
	30.2	27.4		3.5
50CWL1-7	12.6	48	3500	2.9		Y132S1-2H	5.5	120
	25.2	43.2		3.2	4.71
	30.2	38.5		3.9
50CWL1-5	12.6	65	3550	6.6		Y160M1-2H	11	130
	25.2	60.4		3.7	7.03
	30.2	56.5		4.1
50CWL1-3.5	12.6	92	3550	2.4		Y160M2-2H	15	192
	25.2	86		3.1	10.73
	30.2	82		3.9
65CWL1-11	21	34	3500	4.7		Y132S2-2H	7.5	126
	42	30.2		5.0	4.8
	50.4	27.8		5.3
65CWL1-8	21	47	3550	2.9		Y160M1-2H	11	175
	42	43.2		3.2	7.06
	50.4	41.5		3.6
65CWL1-6	21	65	3550	3.7		Y160M2-2H	15	189
	42	60.4		3.3	10.31
	50.4	56		3.7
65CWL1-5	22	92	3550	5.2		Y180M-2H	22
	43	86		5.5	16.0
	50	82		5.8

Type	(60Hz 3 φ 440v) main technical parameter					Motor type power Kw		Weight Kg
Type	Capacity m3/h	Head m	speed r/min	NPsHr m	shaft power kW	Motor type power Kw		Weight Kg
80CWL1-14	36	33	3550	4.9		Y160M1-2H	11	180
	72	30.2		4.9	7.59
	86.4	28		5.0
80CWL1-14A	33.6	29	3550	4.9		Y160M1-2H	11	180
	67.2	26.6		4.9	6.41
	80.6	25.2		5.0
80CWL1-11	36	49	3550	3.0		Y160M2-2H	15	190
	72	43.2		3.9	11.29
	86.4	39		4.8
80CWL1-11A	34.2	44.5	3550	3.0		Y160M2-2H	15	190
	68.4	38.8		3.9	10.19
	82	35.2		4.8
80CWL1-8	36	64.5	3550	5.0		Y180M-2H	22	240
	72	60.4		4.3	16.22
	86.4	55.5		4.1
80CWL1-8A	33.6	57.5	3550	5.0		Y160L-2H	18.5	,240
	67.2	54		4.3	14.64
	80.5	49.5		4.1
80CWL1-6	36	97	3580	3.7		Y200L1-2H	30	350
	72	86		3.1	24.4
	86.4	78		3.6
80CWL1-6A	34	87.5	3580	3.7		Y200L1-2H	30	340
	68	77.7		3.1	22.02
	81.6	70		3.6
80CWL1-5.5	36	111.3	3580	3.5		Y200L2-2H	37	380
	72	108		3.5	29.83
	86.4	105		3.7
80CWL1-5.5A	34	100	3580	3.5		Y200L1-2H	30	370
	68	97.2		3.5	26.61
	82	94		3.7
100CWL1-18	60	35	3550	4.8		Y160M2-2H	15	204
	120	30.2		5.7	12.65
	144	25.5		6.5
100CWL1-18A	57.8	32.6	3550	4.8		Y160M2-2H	15	204
	115.6	28		5.7	11.73
	138.5	23.5		6.5
100CWL1-14	60	48.5	3550	3.3		Y180M-2H	22	252
	120	43.2		4.5	18.1
	144	39.5		5.0
100CWL1-14A	57	43.9	3550	3.3		Y160L-2H	18.5	252
	114	39		4.5	16.33
	137	35.8		5.0
100CWL1-11	60	67.3	3580	3.3		Y200L2-2H	37	365
	120	60.4		4.3	25.63
	144	54		4.9
100CWL1-11	56.1	59	3580	3.3		Y200L1-2H	30	365
	112.2	53.1		4.3	22.41
	134.6	47.3		4.9

Type	(60Hz 3 φ440v) Main technical parameter					Motor type & power kW		Weight kg
Type	Capacity m3/h	Head m	Speed r/min	NPSHR m	Shaft power kW	Motor type & power kW		Weight kg
100CWL1-8	60	93	3580	4.0		Y250M-2H	55
	120	86.4		4.9	37.65
	144	82		6.0
100CWL1-8A	56.4	82	3580	4.0		Y200L2-2H	37
	112.8	76.5		4.9	33.26
	135	72.5		6.0
100CWL1-6	60	139	3580	3.5		Y280S-2H	75
	120	122		4.9	55.4
	144	102		6.1
100CWL1-6A	56.4	123	3580	3.5		Y250M-2H	55
	112.8	108		4.9	47.39
	135	91.2		6.1
150CWL1-16	96	22.4	1780	3.7		Y160L-4H	15	312
	192	18.7		4.0	11.64
	230	16.1		4.5
150CWL1-12	190	29	1780	4	18.99	Y180L-4H	22
150CWL1-9	190	44	1780	4	29.56	Y225S-4H	37
150CWL1-6	190	65	1780	5	46.05	Y250M-4H	55
200CWL1-21	335	19	1780	5	21.13	Y200L-4H	30
200CWL1-15	335	29	1780	5	32.25	Y225S-4H	37
200CWL1-12	180	46.8	1780	3.5		Y250M-4H	55	530
	360	43.2		4.1	51.13
	432	40.5		4.9
200CWL1-18	240	34.2	1780	3.1		Y250M-4H	55	510
	480	30.2		3.3	47
	576	24.1		3.6
200CWL1-9	335	65	1780	6	75.03	Y280M-4H	90
250CWL1-29	600	19	1780	7	37.39	Y225M-4H	45
250CWL1-21	300	33	1780			Y280S-4H	75
	600	28.5		5.5	56.1
	720	22
250CWL1-15	600	44	1780	7	86.59	Y315S-4H	110
250CWL1-11	600	65	1780	7	127.91	Y315L1-4H	160
300CWL1-35	950	11.5	1190	6.3		Y280S-6H	45
350CWL1-40	1080	13.5	1190	6.3	46.83	Y280M-6H	55
400CWL1-30	1680	13.6	890	5.6	60.2	Y315M-8H	75
600CWL1-31	4080	33.1	1190	10.5	432.69		560

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

Home	Products	About us	Contact us
Marine Gearbox	Marine Pumps	Marine Propellers	Hollow Rotating platform
Marine Fire Monitors	Marine Diesel Generator Set	Marine Air Conditioners	Engineering Hydraulic Transmission
Marine Couplings	Marine Thrusters	Harmonic Reducer

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

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

Main performance indices of this technology

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.
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.
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.
The drag - reduction coating performance for long - distance pipelines meets the US standard APIRP5L2.
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

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.
Severe corrosion protection for long - distance pipelines of oil, gas, and water.
Severe corrosion protection for metal process pipelines of acids, alkalis, and salts.
Severe corrosion protection for equipment and structural parts in the chemical engineering and energy industries.
Severe corrosion protection for materials in ocean engineering.

Application examples of this technology

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.
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:

No mechanical seal leakage, abnormal vibration, or noise occurred during the operation of the two pumps.
The impeller rings and seal rings of the two pumps had slight normal wear.
The rubbing surfaces of the mechanical seals of the two pumps had normal wear.
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

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Cis Marine Horizontal Centrifugal Pump

Hangzhou Cagon Transmission Technology Co., Ltd.