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Marine Kort Nozzle

Description: A kort nozzle is a hydrodynamically-designed shroud that encircles a ship’s propeller just outside the blade tips. The kort nozzle improves the overall efficiency of the propeller at low speeds (below ten knots).


We hope to be the best supplier of marine kort nozzle in China.

Description of Marine Kort Nozzle:

A kort nozzle is a hydrodynamically-designed shroud that encircles a ship’s outboard propeller just outside the blade tips. The kort nozzle improves the overall efficiency of the propeller at low speeds (below ten knots). Above that speed, the inefficiency caused by the drag produced by the shroud exceeds the efficiency of the increased water flow through the propeller. For that reason, the shrouded propeller is used almost exclusively on vessels requiring high thrust at low speed, such as tugs and trawlers.  Bollard pull on a tug fitted with a kort nozzle may be up to 30% higher in some situations than the bollard pull on a similar tug with a traditional open propeller.  

The kort nozzle for propeller protector may be fixed, with vessel directional control coming from a traditional rudder, or the nozzle may be designed to pivot, so that the water flow through the nozzle controls the vessel’s direction. Kort nozzle can also provide some protection for the ships navigation in ice region to avid propeller damage.

Feature of Marine Kort Nozzle:

Improve the efficiency of heavy load propeller and increase the propulsion efficiency. 

Reduce vibration of the stern.

Obviously improved the maneuverability when using together with flap rudder.

Pitching reduced and reduce the stall of ship in waves.

Protect propeller and prevent air suction during ship with shallow draft.

propeller protector supplier

Propeller protector

shrouded propeller manufacturers

Shrouded propeller

ducted propeller China

Ducted propeller

Package & Delivery& Payment terms:

Payment :  By T/T(30% deposit T/T in advance, balance 70% cleared out before delivery) or irrevocable L/C at sight.

Incoterm:   EXW/FCA/FOB, C&F/CIF.
Package: Pallet with film packing  or according to customer's requirement.
Lead time : Within one month for one 20'GP.

Shipment : 20'GP, 40'GP,40'HQ, 40'OT or in bulk. 

Application of Marine Kort Nozzle:

Kort nozzle for prop guard

Kort nozzle for prop guard

Marine kort nozzle

Marine kort nozzle

Our Service:

Zhiyou Marine has been doing marine products for many years, which makes the best guaranty for Zhiyou technical advantages with precise design.

Zhiyou Marine is designed according to ABS CCS BV LR DNV NK KR etc standard.In line with the responsibility spirit for customers, we try to satisfy the standards and the customers’ requirement in the process of designing and manufacturing process, as well as fully consider the basic cost. The products we providing will guarantee the quality and reasonable price, which ensure our cooperated customers can get the maximum value and minimum cost.

1) Punctual delivery:
• We put your order into our tight production schedule, keep our client informed about production process, ensure your punctual delivery time.
• Shipping notice/ insurance to you as soon as your order is shipped.

 2) Services after sales:
• An reasonable solution and/or response to any inquiry shall be provided within 24hrs upon receipt of it.
• Terms and conditions of warranty shall be strictly abide by. 
• Maintenance service shall be provided accordingly.
3) Professional design and efficient solution:
• Our experienced engineers and experts guaranteed our customer with satisfactory design &  solution.
• Rich experiences in various bids assistance including documentary support.

• Efficient solution providing through our professional designer and technical supporter.

Marine kort nozzle manufacturers

Marine kort nozzle manufacturers

marine kort nozzle supplier

Marine kort nozzle supplier

Quality  Guarantee:

Product Range:  All marine outfittings, equipments and facilities etc.

Product Design:  With strong engineer team, for all marine products, we support design, manufacture,install etc, according to your requirements. All products strictly conform to your confirmation.


Product Process:  Most of products are finished in our own manufacture bases, thus quality and deliverytime could safely guaranteed and also avoid indirect troubles.

Product Inspection: Double inspection make sure quality guaranteed completely.

Related Products:

As one of the leading marine products manufacturers and suppliers in China, Zhiyou Marine has been specialized in offering quality products for over 10 years. Our related products also include:

Marine products selection

Zhiyou Marine specializes in the business of marine kort nozzle in Shanghai China. We are guaranteeing stable and timely supply, credible quality and sincere service, our products sell well in overseas markets. If you are interested in any of our products, or wish to place a customized order, please contact us. We will do our best to meet your needs.

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    Room 405,Fudan Software Park,188 Changyi Road, Shanghai China.


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