Cwz Marine Horizontal Self-Priming Pump

• Customization: Available
• After-sales Service: Provide 24 - Hour Online Technical Support
• Warranty: Free Maintenance Within One Year
• Model NO.: CWZ series marine centrifugal pump
• 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

CWZ series marine horizontal self-priming centrifugal pump

The CWZ Series marine pumps are installed at the cabin bottom for water cooling and fire - fighting. They can handle sea water below 80 degrees, fresh water, and other non - eroding liquids. When viewed from the motor, the pump rotates anticlockwise.



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
32CWZ-5	4	23.7	2900	3		Y90S-2H	1.5	28
	8	21		2.8	1.2
	9.6	19.5		3.1
32CWZ-4	4	31.2	2900	5		Y90L-2H	2.2	30
	8	30		3.5	1.63
	9.6	28		3.2
32CWZ-3	4	45.7	2900	3.2		Y112M-2H	4	30
	8	42		2.8	2.54
	9.6	40.4		3
40CWZ-6	6	24.5	2900	2.2		Y90L-2H	2.2	48
	12	21		2.6	1.32
	14.4	18.5		3
40CWZ-5	6	3.8	2900	2		Y100L-2H	3	50
	12	30		2.8	1.92
	14.4	28.7		3.4
40CWZ-4	6	42.8	2900	4.4		Y112M-2H	4	50
	12	42		3.7	2.92
	14.4	41.5		4
40CWZ-3	12	50	2900	4	4.36	Y132S1-2H	5.5	136
50CWZ-8	10.5	23.5	2900	3		Y100L-2H	3	51
	21	21		2.8	2.35
	25.2	18.8		3.1
50CWZ-6	10.5	34.8	2900	2.8		Y112M-2H	4	51
	21	30		3.5	3.06
	25.2	27		4.3
50CWZ-5	10.5	44.8	2900	2.3		Y132S1-2H	5.5	52
	21	42		2.7	4.62
	25.2	40		3.2
65CWZ-11	18	24	2900	3.6		Y112M-2H	4	50
	36	21		3.8	3.22
	43.2	19		4.2
65CWZ-8	18	34	2900	4.5		Y132S1-2H	5.5	52
	36	30		5	4.82
	43.2	28.2		5.4
65CWZ-6	18	46.4	2950	2.2		Y160M1-2H	11	65
	36	42		2.8	7.22
	43.2	39.1		3.6
65CWZ-5	18	65	2950	3.2		Y160M2-2H	15	78
	36	60		3.4	11.31
	43.2	58		4.3
80CWZ-14	30	23.8	2900	4.4		Y132S2-2H	7.5	93
	60	21		3.8	5.12
	72	19		4.2

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
80CWZ-11	30	34	2950	4.5		Y160M1-2H	11	95
	60	30		4.9	7.54
	72	27.5		5.6
80CWZ-8	30	47.4	2950	3.3		Y160M2-2H	15	100
	60	42		4.2	12.48
	72	37		4.8
80CWZ-6	30	64.4	2950	3.5		Y180M-2H	22	100
	60	60		3.2	18.16
	72	56		3.8
80CWZ-5.5	30	79.4	2950	2.4		Y200L1-2H	30	120
	60	75		3.5	21.88
	72	71		3.9
80CWZ-4	12.5	27.2	1450	2.1		Y132S-4H	5.5	160
	25	25		2.3	3.4
	30	23.5		2.6
100CWZ-18	50	24.2	2950	3		Y160M1-2H	11	112
	100	21		4.4	8.41
	120	18.6		5.1
100CWZ-14	50	32.2	2950	3		Y160M2-2H	15	112
	100	30		4.5	12.57
	120	27		5.5
100CWZ-11	50	48	2950	3.2		Y180M-2H	22	135
	100	42		4.8	19.72
	120	36.5		6
100CWZ-8	50	64.5	2950	2.4		Y200L2-2H	37	188
	100	60		4.1	29.70
	120	58		4.8
100CWZ-6	50	87.8	2950	3.1		Y250M-2H	55	188
	100	85		4.9	46.29
	120	81		6
125CWZ-23.5	80	23.2	2950	3		Y160L-2H	18.5	165
	160	20		4.4	14.5
	192	17.4		5.1
125CWZ-16.5	80	34.2	2950	3		Y200L1-2H	30	165
	160	32		4.4	22.1
	192	28		5.1
150CWZ-15	125	23.2	1480	3.5		Y200L-4H	30	225
	250	20		4.5	22.7
	300	18.6		5.1
150CWZ-9	100	32.2	1480	2.1		Y225S-4H	37	240
	200	30		2.3	29.7
	240	27		2.6
150CWZ-7	100	52	1480	2.1		Y225M-4H	45	245
	200	45		2.3	37.7
	240	39.5		2.6

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
200CWZ-23.5	200	24	1480	3.8		Y225M-4H	45	300
	400	20		4.5	36.3
	480	17		5.2
200CWZ-15	125	16.2	1480	2.1		Y180M-4H	18.5	340
	250	14		2.3	13.4
	300	11.6		2.6
200CWZ-9	150	49.5	1480	2.1		Y280S-4H	75	260
	300	45		2.3	52.5
	360	43		2.6

Parameters in case of power supply frequency of 60Hz

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
32CWZ1-5	4.8	34.1	3500	4		Y100L-2H	3	28
	9.6	30.2		3.7	2.08
	11.5	28		4.1
32CWZ1-4	4.8	44.8	3500	6.6		Y112M-2H	4	30
	9.6	43.2		4.7	2.82
	11.5	40.3		4.3
32CWZ1-3	4.8	65.5	3500	4.3		Y132S1-2H	5.5	30
	9.6	60.4		3.7	4.39
	11.5	58.1		4
40CWZ1-6	7.2	35.2	3500	2.9		Y100L-2H	3	48
	14.4	30.2		3.5	2.28
	17.3	26.5		4
40CWZ1-5	7.2	45.5	3500	2.7		Y112M-2H	4	50
	14.4	43.2		3.7	3.32
	17.3	41		4.5
40CWZ1-3	14.4	72	3550	5.6	7.53	Y160M1-2H	11
40CWZ1-4	7.2	61.5	3500	5.8		Y132S2-2H	7.5	50
	14.4	60.5		4.9	5.05
	17.3	59.7		5.3
50CWZ1-8	12.6	33.8	3500	4		Y132S1-2H	5.5	46
	25.2	30.2		3.7	4.06
	30.2	27		4.1
50CWZ1-6	12.6	50	3500	3.7		Y132S2-2H	7.5	60
	25.2	43.2		4.6	5.29
	30.2	38.8		5.7
50CWZ1-5	12.6	64.5	3550	3		Y160M1-2H	11	52
	25.2	60.4		3.6	7.97
	30.2	57.6		4.2
65CWZ1-11	21.6	34.5	3500	4.8		Y132S2-2H	7.5	50
	43.2	30.2		5	5.55
	51.8	27.3		5.6

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
65CWZ1-8	21.6	48.9	3550	6		Y160M1-2H	11	52
	43.2	43.2		6.6	8.33
	51.8	37.2		7.1
65CWZ1-6	21.6	66.8	3550	2.9		Y160M2-2H	15	65
	43.2	60.4		3.7	12.5
	51.8	56.3		4.8
65CWZ1-5	21.6	93.6	3550	4.2		Y180M-2H	22	78
	43.2	86.4		4.5	19.5
	51.8	83.5		5.7
80CWZ1-14	36	34.2	3550	5.8		Y160M1-2H	11	100
	72	30.2		5.1	8.84
	86.4	27.3		5.6
80CWZ1-11	36	48.9	3550	6		Y160M2-2H	15	100
	72	43.2		6.5	13.0
	86.4	39.6		7.4
80CWZ1-8	36	68.2	3580	4.4		Y200L1-2H	30	100
	72	60.4		5.6	21.53
	86.4	53.2		6.3
80CWZ1-6	36	92.5	3580	3.3		Y200L2-2H	37	100
	72	86.4		4.3	31.4
	86.4	80.6		5
80CWZ1-5.5	36	114	3580	3.2		Y225M-2H	45	120
	72	108		4.7	37.8
	86.4	102		5.2
80CWZ1-4	15	39.1	1750	2.8		Y132M-4H	7.5	160
	30	36		3.1	5.88
	36	33.8		3.5
100CWZ1-18	60	34.8	3550	4		Y160L-2H	18.5	112
	120	30.2		5.8	14.5
	144	26.5		6.1
100CWZ1-14	60	46	3580	4.8		Y200L1-2H	30	112
	120	43.2		6	21.7
	144	38.8		7.3
100CWZ1-11	60	69	3580	4.3		Y200L2-2H	37	135
	120	60.4		6.4	34.1
	144	52.5		8
100CWZ1-8	60.0	92.5	3580	3.2		Y250M-2H	55	188
	120	86.4		5.5	51.3
	144	83		6.4
100CWZ1-6	60	126	3580	4.5		Y280M-4H	90	188
	120	122		6.5	79.7
	144	116		8
125CWZ1-23.5	96	33.4	3580	4		Y200L1-2H	30	165
	192	28.8		5.8	25.1
	230.4	25.1		6.1

 

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
125CWZ1-16.5	96	49.3	3580	4		Y225M-2H	45	165
	192	46.1		5.8	38.3
	230.4	40.3		6.1
150CWZ1-15	150	33.4	1780	5		Y225M-4H	45	225
	300	28.8		6	39.2
	360	26.7		7
150CWZ1-9	120	46.4	1780	2.8		Y250M-4H	55	240
	240	43.2		3.1	51.4
	288	38.9		3.5
150CWZ1-7	120	74.9	1780	2.8		Y280S-4H	75	245
	240	64.8		3.1	65.2
	288	56.9		3.5
200CWZ1-23.5	240	34.6	1780	5		Y280S-4H	75	300
	480	28.8		6	62.7
	576	24.5		7
200CWZ1-15	150	23.3	1780	2.8		Y200L-4H	30	340
	300	20		3.1	23.2
	360	16.7		3.5
200CWZ1-9	180	71.3	1780	2.8		Y315S-4H	110	260
	360	64.8		3.1	90.8
	432	61.2		3.5

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

                                 

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.