Component seals

Component seals are fixed directly on the shaft. Component seals are a more simple mechanical shaft seal, which gives you technical advantages compared to e.g. regular packing material mounted in the stuffing box, but not the same technical advantages as you would achieve with cartridge seals.

Component seals are often used because of space constraints in the pump and due to their low purchase price.

We help you find the component seal that works well for your pump. Our products are of high quality at an attractive price. Contact us on 76 12 33 66 or to discuss your options.


A component seal consists of separate parts that are assembled individually. Stationary parts, which must not be able to move. And dynamic parts that must be able to rotate together with the shaft.

We can often help you find a combination of the stationary part and the rotating part so that you don't need to modify your equipment. You can insert the stationary part directly into the pump without adaptation and push the rotating part over the shaft to make the seal work.

The advantages of component seals are, among other things:

  • The cost of component seals is lower than that of cartridge seals
  • The individual parts of the seal can be stocked and replaced
  • Component seals do not require the same space as cartridge seals

The disadvantages are, for example:

  • Component seals are more easily damaged during assembly and operation
  • Requirements for correct and accurate installation are high to avoid seal failure
  • Installation time is often longer than for cartridge seals

We supply component seals suitable for the most common pumps.

Component seals for Alfa Laval pumps

We offer component seals that can be used for Alfa Laval pump models:

CM1A, CM1B, CM1C, CM1D, EM1C, EM1D, Fm0, FM0S, FM1A, FM1AE, FM2A, FM3A, FM4A, MR166A, MR166B, MR166E, GM2A, GM2, GM1A, Gm1, ME155AE, MR185A to MR200A, LKH5 to LKH60

Component seals for Flygt pumps

We offer component seals that can be used for Flygt pump models:

2024, 2060, 2066, 2075, 2101, 3041-281, 3057, 3057-180, 3060, 3065, 3067-170, 3067-250, 3068, 3080, 3085-91, 3085-120, 3085-170, 3085-171, 3085-71, 3085-280, 3082-290, 3085-890, 4351, 4352, 4400, steady 7, 2070, 2071, 2102-40, 3082, 3102, Grindex Majir, Master, Matador, Midi,

Minette, Salvador, 3126-90, 3126-180, 3126-91, 3126-280, 3126-290, 3126-181, 3127, 4440, 5530, 2084, 2135, 2151-10, 2151-11, 2151-50, 2201-10

Component seals for Fristam pumps

We offer component seals that can be used for Fristam pump models:

2201/1 Collet Arrangement, 3001/1 Collet Arrangement, 3501/1 Collet Arrangement, 2201/2 Collet Arrangement, 3001/2 Collet Arrangement, 3501/2 Collet Arrangement

Component seals for Grundfos pumps

We offer component seals that can be used for Grundfos pump models:

MTR, CR/CRN 32, CR/CRN 45, CR/CRN 64, CR/CRN 90

Component seals for Hilge pumps

We offer component seals that can be used for Hilge pump models:

001-019 01, 01-28 01, BS2-28 01, BS3-28 01, 001-38 01, BS2-38 01

We offer mechanical shaft seals for a wide range of standard pumps and mixers. We can also find a solution for customised pumps and mixers. No matter what type of pump you have, we have a mechanical shaft seal that will fit your system, your needs and wishes.

Mechanical shaft seals often have 2 sealing sections. The primary sealing section is the sliding faces, where one face is stationary (in a fixed position) and the other sliding face is dynamic (rotating). The secondary sealing section consists of e.g. O-rings. In the seal, springs are used. All held in place in a basic construction. The materials used for the different parts may be e.g.:

Sliding faces


  • Carbon graphite
  • Carbon graphite impregnated with resin
  • Graphite impregnated with antimony


  • Tungsten carbide
  • Silicon carbide, sintered


  • Metal oxides


Secondary seals (O-rings)


  • Ethylene-propylene rubber
  • Silicone rubber
  • Viton rubber
  • FKM + PTFE
  • FKM + FEP




  • AISI 316Ti stainless steel
  • Hastelloy C-4
  • Hastelloy C-276


The basic construction


  • AISI 314, 316…
  • Hastelloy C-4
  • Monel
  • Inconel
  • Titanium

The optimal composition depends entirely on what properties the mechanical shaft seal should have in relation to the specific application. The choice of materials ensures the optimum lifetime of your pump, your shaft seal, etc. as well as the safety of the people on site.

The mechanical seal is only as good as the operating conditions in which it has to function. The system must be balanced so that plant components are not forced into operating ranges for which they are not designed. If there is an imbalance in the system, the mechanical shaft seal will also fail sooner than expected. We can help you with analysis and advice; contact us on 76 12 33 66 or to discuss your options.

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