2.1.5.3
Ball
Ball valves shall comply with the requirements of Section 15400A PLUMBING,
GENERAL PURPOSE. Valves used for hydrogen peroxide service shall be
passivated and vented in accordance with the hydrogen peroxide supplier
recommendations.
2.1.5.4
Check
Check valves shall comply with the requirements of Section 15400A PLUMBING,
GENERAL PURPOSE.
2.1.6
Injectors
**************************************************************************
NOTE: Designer should coordinate pressure
requirements with equipment manufacturers to
determine if supplemental pumping is required to
ensure adequate gas transfer. In certain
situations, multiple injectors may be required if
large flow variations are expected. Injectors are
most commonly used on smaller applications such as
multiple columns in series where ozone can be
injected to the individual columns.
**************************************************************************
High efficiency venturi type injectors shall be constructed of 316L
stainless steel or PVDF at a rated pressure of [_____] kPa psi. Each unit
shall have a liquid flow capacity of [_____] L/s gpm, and shall be capable
of applying 150 percent of the design gas flow of standard [_____] L/minute
cubic feet/hour of a [_____] percent ozone in [air] [oxygen] mixture.
Injectors shall be designed to operate with an available pressure head to
the injector of [_____] kPa psi, and a back pressure of [_____] kPa psi.
2.1.7
Diffusers
**************************************************************************
NOTE: Designer should coordinate with diffuser
manufacturers to determine the proper flow rate and
coverage per diffuser. Rod type diffusers are
generally used on larger rectangular tanks versus
the dome or disc type which can be used in either
circular reactors, or on rectangular units.
Coordinate access requirements with paragraph AOP
Reactor Vessel.
**************************************************************************
Fine bubble diffusers shall be ceramic construction, of the tube, disc or
dome type. Ceramic shall be of bonded silica or alumina, and be resistant
to degradation by ozone in oxygen concentrations of [16] [_____] percent.
Pore size shall be a maximum of [50] [_____] um [0.002] [_____] inch or the
manufacturer's standard pore size which will produce bubbles [2] [_____] mm
[0.005] [_____] inches in diameter or smaller. Gas flow per diffuser shall
be a maximum of standard [_____] L/s cubic feet/minute at a submergence of
[_____] meters feet. Maximum allowable headloss per diffuser shall be
limited to [_____] mm inches. Brackets, holders, bolts, rods, washers and
other accessories shall be 316 stainless steel unless otherwise indicated.
Gaskets shall be of silicone construction.
SECTION 11377
Page 17
Previous Page
