Our separated-head closure uses independent tubeside and shellside flanges, bolting and gasketing. This closure is used for moderate pressures up to 1,300 psi (92 kg/cm2), cyclic service, high temperature differences, and/or for temperatures below -20°F (-28.8°C) or greater than 650°F (343°C).
Our TAPER-LOK® closure is typically used for high pressure up to 15,000 psi (1055 kg/cm2) applications. Like our separated-head, the TAPER-LOK® closure uses separate tubeside and shellside flanges, bolting, and gasketing. The unique feature this closure offers is a reusable TAPER-LOK® ring which acts as a self-energizing seal. TAPER-LOK® is the registered trademark of Taper-Lok Corporation. Koch Heat Transfer Company has an exclusive license for TAPER-LOK® closures for use in double-pipe and multi-tube hairpin heat exchangers.
The LOK-FLANGE® closure uses common through-bolting with independent gaskets and is typically used for design pressures below 1,000 psi (70 kg/cm2). The center flange of this closure is threaded, which allows removal of the tube-end flange for inspection and cleaning of the tubes while maintaining pressure on the shellside. This closure allows the maximum number of tubes in a given shell diameter.
The ZR CLOSURE™ closure is the newest addition to the BROWN FINTUBE® family of closures. This closure bridges the gap between the separate-head and the LOK-FLANGE® closure by providing separate tubeside and shellside flanging and bolting, while retaining the maximum number of tubes in a given shell diameter.
This closure is a conservative through-bolted design. When the bonnet is removed, the U-bends of the tubes are completely exposed to permit full field inspection.
Our closure designs provide an effective means of providing a removable tube bundle for a variety of design conditions and applications. All of our closures have the following features:
|Efficiency in design||Variety of solutions|