BC-01 for Blackmer pumps

The mechanical seal BC-01 is specially designed for Blackmer rotary vane- positive displacement pumps of the TX Series. These Pumps are usually used in tanker trucks and refueling systems for ships and airplanes. The TX Series stands out by its ease of maintenance of its mechanical seals and its appendant components. Its primary consideration are its pumping fluids, among others these are mostly mineral oils, crude oils and fuels. Along with other factors the mechanical seal is one of the primarily reasons for its high life span. STB GmbH specially designed a mechanical seal for an application where the customer has the choice of various material combinations, to offer the best suitable solution.

Our mechanical seal BC-01 is compatible to the following pump types: TXD3E TXSD3E TXS3E TX3E

Compatible with:

  • Blackmer TXD3E
  • Blackmer TXSD3E
  • Blackmer TXS3E
  • Blackmer TX3E


Part list number:

  • 153


Mechanical seal type:

  • BC01-45 (STB identifier)


The easy to assemble component seal is available as standard replacement unit whit the following materials:

  • Standard: BSPGG (Carbon B / Chromesteel/ NBR / 1.4301 /1.4301)
  • Sealing face: TC (Tungsten Carbide), S (Chromstahl-Chromesteel), Carbon B
  • Stationary seat: S, TC
  • O-rings: FKM / PTFE / EPDM / NBR / FFKM
  • Steelbody: 1.4301 / 1.4404
  • Springs: 1.4301
Blackmer Pumpen

Standard configurations and options:

The seal ring consists of Carbon B while the stationary seat consists of chromium cast. The secondary seal (elastomer) is made of NBR (Nitril-Butadien-Rubber) and the spring material is 1.4310 CrNiMo Steel. The appropriate case is produced in Steel 1.4310 as well. In addition, the STB GmbH offers a tribological optimization of the mechanical seal pairs, where the stationary seat consist of tungsten carbide. The position number of the mechanical seal on the Blackmer TX series is always 153. Mechanical seals for TXD3E and TXS3E pumps are worldwide ready to deliver a few days after order. For TXSD3E and TX3E pumps we can provide a quick available mechanical seal with tungsten carbide. Material with short supply times as well.

Pump Types


The TXD 3E is mostly installed in tank trucks and tank farms to carry a variety of media in refueling of ships, aircraft and motor vehicles. Such media may be any mineral oil products, for example gasoline, kerosene, diesel or biological fluids. Therefore, the requirements for the sealing components are very high, which can be met with the versatile material combinations. The combination of the sealing surfaces is crucial over the life of the seal and the equipment.

If chemically aggressive fluids are conveyed, carbon / SiC are suitable as sliding surface pairing. For water or crude oil production use carbon / tungsten carbide.


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