CLH pump

I-a. Centrifugal CLH Pump

Qmax to 400m3/h, Hmax to 120m, Inline type, Monoblock or coupling type

SKU: Large capacity range, Compact structure, High efficiency, Easy installation/service, Monoblock type & coupling type, In line flanges(2 poles type), Same size flanges(4 poles type) Categories: , , , , , , , , ,

The SILI CLH pump is an ideal centrifugal marine pump. CLH vertical marine pump is popularly used in marine and offshore industry. It is a centrifugal type with volute casing vertical construction. And it is single stage, single flow. CLH pump is suitable liquid for fresh water or sea water with little particle below 70 C degree.  Specially mechanical seal for 120 C degree is available. CLH pump typical spplication is for fresh and seawater cooling pumps; bilge and ballast pumps, fire-fighting, general service pumps, deck-wash pumps and so on. CLH pump spare parts can be also available in our sides.


The CLH marine centrifugal pump Feather:

a. Curved blades to ensure low NPSH-values and high efficiency impeller, it is close type, statically and dynamically balanced .

b. Shaft supported by radial and thrust ball bearings either grease or self-lubricated.

c. High quality replaceable mechanical shaft seal of an approved brand; it is carbon/ceramics/stainless steel material. A special mechanical seal for temperature higher than 120 C.

d. Bronze pump casing&body, impellers and stainless steel shaft as standard for sea water.

e. Flanges are usually in Chinese GB standard. However other standard flanges in EN(DIN), ANSI, and JIS and so on, can be also provided.

f. A priming air ejector can be equipped on sides pump.

Refer to pump and its spare parts details from the CLH pump catalogue. Contact us more information for pump specification, manual, performance curve, installation dimension, spare parts list and so on.


The CLH pump, in spacer coupling type and monoblock(direct) type design. The pumps are available in sizes ranging from 25 mm to 250 mm on the suction flange. The suction flange is bigger than the discharge flange in 2 poles motor pump; or it is same with the discharge flange in 4 poles motor pump.

The CLH pump is a single stage, single suction centrifugal pump used in marine and off shore industry. The pump is a so-called in-line type, i.e. suction and pressure branches are mounted on the centre line.

Shaft and shaft seal: basically there are two kinds of shaft sealing: the packing and the mechanical seal, a mechanical shaft seal with stainless steel shaft is a standard.

Bearings: the pump shaft is guided by antifriction bearings. It is usually designed for grease lubrication(standard) or oil lubrication.

Material for wet part: pump impeller, pump cover & casing(body) are in brozne for standard for sea water; while for fresh water, cast iron pump casing is optional

Motor: in high class and insulation level, TEFC, IEC standard, 50Hz or 60Hz; especially designed for marine and off shore purpose.

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CLH pump Technical details:

–Motor: 2 or 4 pole quality IEC motor configurations, with high level class(class F or higher) and insulation(insulation IP44 or higher), in both 50Hz or 60Hz, Y-H series, suitable for marine purpose, Starting in direct type(small power) or Star-delta type.

–Material: pump casing/cover: bronze(sea water) or cast iron(fresh water), pump impeller: bronze, shaft and key, stainless steel

–Shaft seal: mechanical seal, material: SIC(silicon carbide),hard alloy and ceramics, double face mechanical seal for big power pump.

–Coupling: flexible coupling type, material in carbon steel, or monoblock type(model marked with Z)

–Bearing: motor side, two enclosed antifriction bearing, lubricated by grease; pump side, upper antifriction bearing, lower thrust bearing, lubricated by oil or grease.(no pump bearing for model marked with Z)

–Priming: air ejector type, pressure for the compressing air: 0.5 to 0.7 Mpa, air consumption for the compressing air: 0.12 m3 per min. source: single phase/50Hz or 60Hz, self-priming height 6 to 7 meter(specially for the self-priming request)

–Accessory: motor terminal box, lifting hooks, grease nipple, oil cup, air vent plug, drain plug, gauge connection plug and so on. self-priming ejector(for self-priming request)

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Standard pump supply range: pump, coupling(for the coupling type), motor, pedestal and standard accessories.

Optional supply: accessories: vacuum and pressure gauge, opposite flange, starter, valves, self-priming device, nuts and bolts and so on, suggested min spare parts: 1 pcs of impeller, 1 pcs of shaft, 2 pcs of mechanical seal, 2 sets of bearing, 6 pcs of O-ring

Certificate of classification society available: DNV, LR, ABS, BV, RINA, KR, NK and CCS

Standard packing: plywooden case.

Production time: usually in 35 to 45 days for bronze pump, 25 to 30 days for cast iron pump.

Warranty time: one year after shipment.

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Case reference: it is updated in case blog.
Please click the following link for relative case.

a. 2015.09-six closed coupling CLH pump to a Russia client.

b. 2015.10-2 pcs of coupling CLH centrifugal pump to a Netherlands client.

c. 2017.07-4 pcs of CLH water pump to a Russia client.

Usage or application: This pump can be use for ballast, bilge, cooling, GS, fire-fighting and so on.
Please click the relative category in right of the production picture for more information

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Kindly send your specific inquiry, we will reply you in one working day.
Please contact us through:
a. directly send us an e-mail, sales@silipump.com(suggested).
b. contact us throught the online Skype or Online message(just working time in working day).
c. leave a message on the web.

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