Fluoroplastic Containment Tanks

Holscot are World leaders in the development of FEP tanks and Diaphragms for Liquid Containment and Expulsion. Our exclusive processing experience facilitates innovative constructions in Fluoroplastics.

FEP Water TanksFor over 40 years, Holscot has been at the forefront of technology to manipulate Fluoroplastic Films FEP, PFA and ETFE.

The development of unique, sophisticated techniques to weld, thermoform and chemically treat these difficult materials provided the basis for the concept of Fluoroplastic Propellant Tanks. Major users have included the Ministry of Defence, British Aerospace, Astrium and MT Aerospace.

  • Made from 100% FEP ( PFA and ETFE also possible)
  • Resistant to virtually all fluids, including major space propellants and most gases
  • Thin Wall = Low Weight
  • No outgassing at low vacuum
  • No high front end tooling charges
  • Quick delivery and prototypes a speciality
  • Pigmented film can be used
  • Outer surface can be etched to allow bonding to Carbon Fibre, Flexible Elastomer or Metals.
  • Outer surface can be plated for extra inertness.
  • Ideal for containment of any fluid. Completely inert
  • Integral fluoroplastic (FEP) diaphragms can be included

FEP’s compatibility to the major Space Propellants has been investigated by many companies and it has been established that it is unaffected by, if not all, the vast majority of these propellants, including the new green propellants. In most cases, our customers choose to carry out their own test programme to establish compatibility and Holscot can assist with carrying out comparative tests on immersed samples.

Vacuum forming is used to form the ends using unique custom made equipment. Outlets and ribs can be incorporated during this forming process. Advanced welding techniques are implemented to form the body and join the ends. If necessary, the outside surface of the tank can be etched to provide a surface onto which resins can bond. This combination of capabilities is unique to Holscot.

Tanks can also be constructed using fluoroplastics which have a fabric embedded in them. Most commonly that is glass fabric but carbon fibre backing can also be provided. Overwrapping these constructions provides a homogeneous lightweight tank which offers an alternative to standard metal propellant tanks. A fluoroplastic diaphragm can also be included in the design.

Tanks constructed in this way not only reduce the mass inside space propulsion vehicle but they are also demisable, a feature which is becoming ever more important.

 

Case Study

MT Aerospace

In order to provide the astronauts on the International Space Station with vital supplies, the European space ferry ATV (Automated Transfer Vehicle) is launched...

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