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  • slide-allgemein-header_valve-seat-rings-for-Marine-Diesel-and-Power-Plant-Diesel-engines-3
  • slide-allgemein-header_valve-seat-rings-for-Marine-Diesel-and-Power-Plant-Diesel-engines-2
  • slide-unternehmen-header_worldmap-service-and-spare-parts-for-MAN-Diesel-engines-and-Himsen-Diesel-engines

Valve seat rings and valve guides suitable for power plant- and marine diesel engines

MAN B&W - Hyundai Himsen - MaK - Wartsila


We produce valve seat rings from standard materials as well as of stainless steels whose blanks are centrifugal casted. The range of diameters is extending from 65 up to 160 mm. Our valve seat rings are available in all common oversize stages.

The raw material of valve guides - manufactured by SECO - is consisting of high thermal conductive lamellar graphite iron -made in Germany. Although this component appears to be manufactured quite easily, the production process is requring the highest degree of precision due to tight bore tolerances and the demand in concentricity. To comply with these geometric parameters, SECO is using State-of-the-Art machining technologies.

Bearings, bearing shells and bushes for the most common applications on large 4-stroke engines are available ex stock. Our range of products is covering connecting rod-, cam- and rockerarm bearings. Connecting rod bearing shells as well as main bearing shells are also within our scope of supplies. For all required applications, we provide spares, produced by approved manufacturers only.

Made in Germany


Spare parts suitable for:
  • MAN 16/24
  • MAN 23/30H
  • MAN 23/30A-K
  • MAN 27/38
  • MAN 28/32H
  • MAN 28/32S
  • MAN 32/40
  • MAN 32/40CD
  • MAN 48/60A
  • MAN 48/60B

Hyundai Himsen

Spare parts suitable for:
  • Himsen 21/32
  • Himsen 25/33


For more information please visit the website of our sister company MMS

Marine Motor Service GmbH

Spare parts suitable for:

  • MaK M20
  • MaK M25
  • MaK M32
  • MaK M43
  • MaK M281
  • MaK M282
  • MaK M331
  • MaK M332
  • MaK M451AK
  • MaK M452AK
  • MaK M453AK
  • MaK M551AK
  • MaK M552AK
  • MaK M552C


For more information please visit the website of our sistercompany MMS

Marine Motor Service GmbH

Spare parts suitable for:

  • Wärtsilä VASA32
  • Wärtsilä W32
  • Wärtsilä W38A
  • Wärtsilä W46A
  • Wärtsilä W46B
  • Wärtsilä W46C
  • Wärtsilä W46D
  • Wärtsiläa W46GD
  • Wärtsilä W50DF
  • Wärtsilä W50SG