High Pressure Testing with Agitation Systems

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We’re trusted with world-leading materials testing laboratories in providing advanced high pressure testing systems and autoclaves with integral high-pressure agitation and mixing systems.

Allowing finer control of the temperature gradient throughout the vessel and ensuring the temperature of the DUT remains within a tightly specified tolerance band, throughout the entire test period. To establish an even distribution of mixed particles within the test media, for chemical mixing, blending or environmental simulation.

To improve the heat transfer of the test media by forced convection; reducing the time required to heat/ cool the media and improving the efficiency of the heating/ cooling system. Performance and efficiency of the agitation or mixing system design can be proven using Computational Fluid Dynamics (CFD); ensuring temperature or particle distribution satisfies requirements prior to manufacture.

KW Designed Solutions has a range of designed and developed high pressure agitation systems on offer, with various types of high pressure testing vessel; each of them bespoke to ensure the customer’s exacting requirements.

pressure vessel system with integrated high-pressure agitation and mixing systems


  • Ceramic Bearings and FFKM Seals
  • Hermetically Sealed Glandless Magnetic Drives
  • Materials of Construction: Stainless Steels and Corrosion Resistant Alloys (CRA) For Use with H2S Sour Gas
  • Mounting: Top Mounted, Bottom Mounted or Horizontally Mounted
  • Pressure Ratings: Up To 1400 Bar
  • Propeller, Turbine and Paddle Blade Agitation for High and Low Viscosity Liquids and Gases
  • Sparge Pipe Style Designs for Simulating Subsea Environments with Sea Water, Sand and Silt
  • Speeds: 10-4000 Rpm (Variable Speed Control)
  • Temperature Ratings: -20°C To 350°C
  • To Suit Vessels: Up To Ø600mm and 6m In Length, Horizontal or Vertical Orientation
  • Torque: 1-10Nm


  • Cost-Effective Way to Replicate Accurate Turbid Environmental Conditions for Subsea Simulation Testing
  • Dramatically Improves the Heat Transfer Rate; Reducing the Time Taken to Heat/ Cool the Test Media and Reducing the Temperature Gradient Across the Test Media. This Ensures the DUT Is Evenly Subjected to the Same Temperature
  • Improves the Efficiency of Heating and Cooling Systems by Reducing Power Consumption
  • Integration Removes the Need for Using Expensive, Lower-Spec Agitators, Which Are Not Specifically Designed to Suit the Testing Requirements
  • Provides a Highly-Efficient Method of Promoting Chemical Reactions in Reactors and Autoclaves

Applications and Customer Uses

Pressure vessels with integrated agitation are a common choice with customers who work within the subsea and materials research sectors.

Mixing and stirring applications improve the heating/ cooling efficiency within test systems and create an even temperature distribution of test media within the vessel and test platform.

Designed uniquely for customers who manufacture subsea equipment; our agitation system allows the creation of an ideal subsea testing environment. We can create an even distribution of sand and silt throughout the vessel, whilst conducting wet-mate electrical connector testing (mate/ demate functionality). This added functionality has vastly improved the realism of testing platforms; enabling them to meet the most stringent testing requirements and demands.

Our high temperature, NACE compliant agitation systems enhance testing conditions, whilst also operating at high pressure and high temperature in the most hostile and corrosive environments. Including autoclaves supplied to clients in material research laboratories performing ASTM G-38 type Stress Corrosion Cracking (SCC) tests in Sour Gas H2S.

Project Example

High Pressure Testing System with Integrated Agitation for Particle Deposition Studies

Designed and manufactured high pressure testing system complete with an automated pressure control system for a global provider of oil and gas exploration services.

High Pressure Testing System with Agitation