Bolted Closure Laboratory Batch Reactors

The highest pressure rating of the standard laboratory stirred reactors


The bolted closure reactor is a versatile high pressure & high temperature, laboratory batch reactor. It is used for chemical synthesis of corrosive, hazardous & very reactive chemicals / petrochemicals as well as materials research. The 5,500 psi @ 650°F (379 bar @ 343°C) pressure rating is based on the stress level limits of ASME Boiler and Pressure Vessel Code Section VIII Division 1. See the "Bolted Closure Pressure Vessels" bulletin for pressure ratings at other temperatures.


The cover of the unit remains fixed in the stand to permit opening of the vessel without disassembling any process connections. the body is easily removed and drops away from the cover.


Bolted Closure Laboratory Batch Reactors


  • 316SS & HASTELLOY® C-276 materials are standard; other corrosion resistant alloys are offered

  • Maximum Pressure is 5,000 psi @ 850º F (379 bar @ 343ºC)

  • Metal-to-metal seals resists chemicals & extreme temperature

  • Standard capacity range of 100 to 4,000 ml is used as a lab continuous stirred tank reactor (CSTR) or slurry reactor

  • Process fittings in the cover (one for adding powders e.g. catalysts) allows lowering the tank with lines attached

  • Sparging, charging, blowpipe, sampling & cooling coil process connections are ideal for most chemical reactor processes

  • The MagneDrive® magnetic mixer used in the stirred reactor eliminates dynamic seals & assures trouble free mixing. It has a maximum speed of 3,300 rpm dependent on style of drive and customer process.

  • The straight wall design allows access to the full diameter & depth of the reactor once the full size cover is removed

  • Optional process control instrumentation measures & controls temperature, mixing speed & pressure

  • High pressure reactor equipment is delivered custom configured & after full functional testing for fast & easy start-up



The high pressure reactors can be customized with sightglasses, liners & high pressure analytical probes. Ease of cleaning reduces the risk of cross-contamination. It has improved experimental repeatability compared to non-stirred autoclaves, laboratory bombs & reaction kettles. See AE Closure Ultra High Pressure Reactors for pressures above 5,000 psi (379 bar). See EZE-Seal Laboratory Reactors for pressures of 3,300 psi (227 bar) or less.