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20 Bartles Corner Road
Flemington, New Jersey 08822 USA

P: 1-908-237-9099 | F: 1-908-237-9503

Recent News
  • Mr. Miguel Chorivit Joins Simplex Americas Marine Propulsion Service Team

    Simplex Americas LLC is Pleased to Announce the Addition of Mr. Miguel Chorivit to our Marine Propulsion Service Team FLEMINGTON, NJ, June 14, 2018 /24-7PressRelease/ — Miguel, formerly with Rolls Royce USA, brings an extensive and varied background in multiple Marine Propulsion Systems specialties, including CPP systems, thrusters, azimuthing thrusters, waterjets, and controls. He will complement our […]

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  • Simplex Americas Sign New Distributor Agreement with Wågene Purifier

    Simplex Americas have today announced the signing of an agreement to officially represent Wågene Purifiner Technology within North America, Central America, and South America. FLEMINGTON, NJ, May 10, 2018 — Wågene, the experts in oil conditioning technology, have since 1999, offered oil purification units for hydraulic and other lubricating oils and fuels into the shipping […]

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  • Simplex Americas Marine Services and Trade Shows

    Marine Services and Supply Since 2003, Simplex Americas LLC has been dedicated to providing marine services, sales, spare marine parts, and engineering to the marine industry all covered by factory trained specialist. Simplex Americas has become a name you can rely on for quality products and marine services. Simplex Americas team of highly skilled engineers […]

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  • Participating in one of the largest Marine Supply Industry’s events

    International WorkBoat Show SimpleX Americas is continuing to move forward in the marine supply industry.  November 29th-December 1st SimpleX Americas will be attending the International WorkBoat Show in New Orleans, Louisiana.  During this three day event, SimpleX Americas will be showcasing and networking with some of the marine industries most prominent and best businesses around!  […]

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  • Simplex Americas Pacific Marine and Supply

    Do you work in the marine industry and use marine parts? Simplex Americas will soon have their pacific marine and supply parts displayed at an expo near you.  Are you interesting in learning more about the products and services Simplex Americas offer? If so, then this is your chance! Pacific Marine and Supply Simplex Americas will […]

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  • Simplex Americas Returns to IMX

    The marine propulsion equipment and service specialists are proud to attend and sponsor the 2017 Inland Marine Expo! FLEMINGTON, NJ, May 03, 2017 — This year’s Inland Marine Expo will be held at The Dome at America’s Center from 22 to 24 May 2017. IMX is an “annual trade show for the inland and intra-coastal […]

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  • Simplex Americas at International Workboat Show

    Come visit us in New Orleans, LA at the International Workboat Show Nov 29 – Dec 1. The International Workboat Show is three days of peer-to-peer training and professional development specific to the commercial marine industry. 2017 program details will be available in late spring. More information to come! emailFacebookGoogle+TwitterLinkedin

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  • Simplex Americas at Inland Marine Expo

    Come visit it us at Booth #811 at the Inland Marine Expo, St. Louis, Missouri May 22 – 24. Inland Marine Expo (IMX) at Union Station in St. Louis, Mo Simplex Americas LLC is once again showcasing the SIMPLAN shaft seal, NoLo Composite Bearings and SKF products. The 2017 Inland Marine Expo is “in the […]

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  • Simplex At Work Boat 2015

    Come visit it us at Booth #2617 December 1 thru the 3 at the International Work Boat Show in New Orleans emailFacebookGoogle+TwitterLinkedin

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  • Simplex Americas at IMX

    Flemington, New Jersey March 11, 2015FOR IMMEDIATE RELEASE Inland Marine Expo (IMX) at Union Station in St. Louis, Mo Simplex Americas LLC will showcase their SIMPLAN shaft seal, NoLo Composite Bearings and SKF products. This year’s Inland Marine Expo will be held at Union Station from 15 to 17 June and registration is now underway […]

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  • Inland Marine Expo- 2015

    Stop by booth # 5 to see our dripless SIMPLAN Shaft Seal & “NoLo” Composite Bearings! June 15-17th 2015 Union Station St.Louis, MO Simplan Tech 1     emailFacebookGoogle+TwitterLinkedin

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The Airspace Non-Pollution Stern Tube Seal

Airspace-2011-v3-Email1_img_1The Airspace Non-Pollution stern tube seal has shown that environmental and technical operations considerations are not mutually exclusive. From the technical and ecological point of view a safe sterntube system is becoming increasingly important for ship operators. These requirements have led to the development of the “Simplex-Compact Airspace Non-Pollution” sterntube seal.

The oil and water are separated by an air chamber filled with compressed air so that oil leakage out of the sterntube into the surrounding seawater or ingress of seawater into the sterntube is now technically impossible. The oil and water necessary for lubricating the sealing rings is collected in the separating chamber and automatically drained into the bilge at periodic intervals by a pipe and valve system. “Non-Pollution” means: No seawater enters the sterntube oil, and no contamination of the seawater by sterntube oil.

Airspace-2011-v3-Email1_img_2A water-free sterntube bearing guarantees a long service life for the bearing with all the associated benefits. Failure of the very important propeller shaft bearing has become virtually impossible. With the “Simplex-Compact Airspace Seal”, in addition to the environmental aspect, ship operators no longer have to be concerned that they will become involved in extensive and costly liability proceedings with port authorities. The ship operator can now state that the propeller shaft seal cannot be the cause of any oil pollution.

The Airspace System

Airspace_SternTube_SealThe sealing rings are arranged so that three outer rings face the sea water and the innermost ring #3 faces the sterntube oil. Sealing ring #0 serves mainly as a dirt rejector and sealing ring #1 seals against the sea water. Using a circulator in chamber I, cooling of sealing ring #1 is achieved by constant circulation of the surrounding outside water through the chamber. Located between sealing ring #1 and #2, the airfilled chamber II (Airspace) is connected to an air supply to form a defined pressure cushion and a drainage inboard. Chamber III which is between sealing ring #2 and #3 is filled with oil. The oil pressure in chamber III is determined by the installation height of the oil tank which is connected to the chamber by a pipeline.

Free fluid particles are collected in the Airspace chamber and are blown and drained inboard at predetermined, adjustable intervals by the pneumatic automatic control system. For vessels which have large differences in draft between load and ballast conditions, the pneumatic control has an additional input signal from a draft meter.

The Airspace Advantages:

  • Two seals in one: the non-pollution Airspace Stern Tube Seal and the SC 2 B standard seal.
  • Low air consumption – no constant bubbling
  • Airspace pressure is always lower than the water pressure: air cannot escape with oil to the seawater.
  • Condition Based Monitoring of the sealing rings using the drain test feature.

Download the Product Sheet

Airspace Flier

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