Quark pilot plant reactors in 30 and 50 Liter volumes are available complete or by individual components. Each cylindrical reactor is available with or without a cooling or heating jacket with 1" beaded pipe connectors for fluid circulation to the jacket, a 7-neck 300 mm reactor head with 55/50 center, 3-45/50 side and 3-29/42 side ports, a 300 mm phenolic flange clamp with 12 SS bolts, a removable 22 mm no-hold-up bottom drain valve on 2" bp with KALREZ o-rings and a 1" beaded pipe take-off for drainage of fluid transfer. Each reactor also is available with a stainless steel support rack with a supporting shelf for the reactor body, powerful overhead stirrer with a controller, a stirring system with a 19 mm or 32 mm polished stirring shaft, teflon stirrer bearing and a J-Kem temperature monitor with a teflon probe. In addition, these systems include a coiled condenser with a jacket and internal threaded adapters as needed. Additional accessories are available including solid or liquid addition funnels, offset adapters, thermowells, aspirators and stoppers. Optional Air-driven stirring motors are available upon request.