The KW Designed Solutions segmented clamp closure pressure vessel, has a quick-acting closure mechanism, which incorporates a 2 or 3-piece clamp arrangement. The segmented clamp closure is innovatively engineered; lightweight yet robust and provides the operator with a quick and simple opening / closing functionality.

The segmented clamp closure is engineered, so that the vessel body remains slender and the closure plug relatively lightweight. A compact flange profile is machined into both the pressure vessel body and the closure plug; ensuring smooth engagement of the segmented clamps and effective containment of the end loads caused by high pressure.

We can also incorporate pressure vessel support frames and closure support frames into the design, to ensure closure alignment to the vessel body is maintained. For larger pressure vessels, automated closure mechanisms can be supplied to aid and simplify the handling of the segmented clamps and closure plugs whilst also optimising vessel access.

KW Designed Solutions segmented clamp closure pressure vessels are supplied with operating pressure of up to 2000 bar and a temperature range of -20°C to +300°C.

Autoclave with a segmented closure with a pressure booster system (PBS) for conducting corrosion and cracking tests of metallic and polymer specimens at high pressure and high temperature (HPHT)


  • Material of Construction: Stainless Steels, Exotic Steels (Hastelloy, Inconel), Carbon and Alloy Steels
  • Pressure Rating: 50 bar to 2000 bar
  • Seal Types: O seal, PTFE, Metallic Seals (BX Rings, C-Rings, Metal Seal Rings)
  • Size: Between Ø75mm to Ø400mm Bore & Depths of 150mm to 2000m
  • Temperature: -20°C to 300°C
  • Volumes: 0.5 litre to 250 litres


  • Custom Size & Pressure Range Available to Meet Specific Requirements
  • Integral Safety Interlocking System
  • Long Service Life
  • Low Maintenance Requirements
  • Minimal Shop Floor Footprint
  • Quick Acting Opening/ Closing Times: 2 Minutes to Open/ Close, 10 Seconds to Lock/ Unlock

Applications & Customer Uses

Our segmented clamp closure vessel, has an advanced design, applicable to all vessel types. It can be specified with single or double ended closures and capable of containing medium to high pressures. 

The segmented clamp closure is a popular choice for customers working in scientific and material research sectors; used on autoclave and reactor pressure vessels for quick load/ unload operation and where good access into the vessel is required.

Project Examples

High Pressure, High Temperature Autoclave with a Pressure Booster System for conducting corrosion and cracking tests of metallic and polymer specimens
HPHT Autoclaves for corrosion and cracking tests

This HPHT autoclave has removable upper & lower closures, both of which are clamped into a pressure vessel body using a 2-segment clamping method.

  • Pressure Rating: 1700 bar
  • Size: Ø150mm x 400mm depth
  • Temperature: 0°C to +325°C
  • Volume: 7 litres

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