Reliability at high temperatures and large nominal widths

The strength of the tight shut-off valve HTK is its absolute tightness at temperatures up to 950 °C. The triple eccentricity combined with the special metallic sealing system in the valve ensures easy opening and closing, even at extreme  temperatures.

Our state-of-the-art welding technology makes it possible to work with large nominal widths and enables us a great deal of flexibility with which we manufacture special lengths and custom-made valves in accordance to the requirements of our customers. Whether a heating jacket, single- or double-row steam injection, or valves that open and close at extremely high speeds: we provide customised solutions for the HTK for a wide variety of purposes. The compact design of the valve, even for large nominal widths, makes the HTK the valve of choice for both underground and overhead lines.

The tight shut-off valve HTK is available both as a standard model and in a variety of customised designs. The custom-made models include:

  • The HTK for ethylene plants
    The TLV transferline valve and the DV decoking valve
  • The HTK block & bleed
    Two seals are placed one behind the other in the seal seat. A chamber between the seals can be used to suction off residual leakages or for barrier media.
  • HTK for FCC plants
    Valves with expander inlet and bypass for coping with extremely high temperatures and abrasive media.


  • Optimal tightness
  • Withstands high temperatures
  • Progressive sealing
  • Reliable functioning in any position installed
  • Capable of combining various operating tasks: flow regulation, shut-off function
  • Great resilience, even at high switching frequency
  • High flexibility due to welded construction
Tight shut-off valve HTK block and bleed

Block & bleed

Operating processes can make it necessary to avoid even the most minor of leakages. In order to achieve this, two seals are placed one behind the other in the seal seat with a chamber between them. The chamber can be pressurised with a barrier medium of liquid or gas. A leakage detector can also be installed to test tightness.

Quick-opening and quick-closing function

The control and regulation of opening and closing can be supplemented with a quick-opening and quickclosing function. The function offers control reaction times of less than one second.

Hard-coated seal seat 

For use at extremely high temperatures, solid metal seals are used that are additionally hard-coated. The sealing parts both on the valve and in the body are equipped with a low-wear hard facing.

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ADAMS Product range
FCC brochure
Ethylene brochure
Hydrogen brochure