Jacketed Vessels

Jacketed Tanks and Vessels with temperature control

Mixing and storage systems with integrated heating/cooling are now used universally in the manufacture of food & beverages, pharmaceuticals, health & beauty products and speciality chemicals.

Precise temperature control is essential to guarantee consistent product quality and stability, ensure hygiene and aid processing and discharge of viscous products.

Greaves engineers work closely with our customers technical team to understand their process challenges and design the most appropriate heating/cooling and control system. Key considerations include:

  • Heat sensitivity of products
  • Exothermic and endothermic processes
  • Process temperature range and tolerance
  • Integration with existing processes and control systems
  • Hygiene and biosecurity

The resulting design will address the following:

  • External jackets or internal coil for heating and cooling
  • Whole tank heating or zonal heating
  • Insulation and cladding
  • Thermal fatigue and pressure cycling
  • Pressure Equipment Directive (PED) code and certification
  • Effective heat transfer
  • Heating media

5000L Jacketed Reactor

150L Electric Jacketed Vessel

Steam Jacketed Vesssel

Electric Jacketed Vessel


  • Temperature -30 to 280C
  • Capacities 2 litres to 12,000 litres
  • Internal vacuum/pressure processing
  • Blending, high shear and equalisation mixers
  • Limpet coil and spiral baffle jackets
  • Steam or oil heating medium
  • Insulation and cladding
  • Hygiene control and hygienic finishes

Accreditation Bodies:

  • British Engineering Services
  • Bureau Veritas
  • Lloyds Register

Jacketed Vessels FAQ’s

  • Vessel volumes range from 1L for laboratory “pots” to 12,000L.
  • Maximum vessel volume depends on process-specific factors, including internal vessel pressure and pressure rating of the external jacket.
  • Options include
    • Carbon Steel
    • 304 & 316L stainless steel
    • 316 Ti stainless steel
  • Vessels can be supplied jackets for
    • heating with water, oil or steam
    • trace heating to maintain product temperature
    • cooling using water or chilled oil
    • cooling to very low temperatures using a glycol mix.
  • Spiral baffle
  • limpet coil
  • dimple jacket
  • electrical heating
  • Fatigue should always be consider with a pressure vessel, particularly a heated version.
  • Repeated cycles of thermal expansion and contraction can cause mechanical stress.
  • The cyclic behaviour of the vessel must be consider in the design, installation, insulation and transient operations (thermal shock).
  • Greaves can perform a fatigue analysis and certify vessels for cyclic operations. Detailed process spec is required to perform this service.
  • Load cells are the most used method.
  • Radar systems and level sensors are alternative options for precise monitoring of volume and fill levels.
  • A risk assessment should be carried out to evaluate the likelihood and impacts of leaks or failures. This will determine whether bunding is required.
  • The shape of the vessel base is an important factor in determining the fluid flow and consequently the process efficiency when mixing, discharging, and cleaning.
  • Greaves can supply CIP cleaning systems as required.
  • Careful system design is crucial to ensure avoidance of traps, shadows and difficult edges which could compromise the effectiveness of cleaning