b.
One end of each sleeve shall be closed and the other end sealed by
a lamp end seal and compressed O-ring. The closed end of the
sleeve shall be held in place by means of a retaining O-ring. The
sleeve shall not come in contact with any steel in the frame.
2.2.4.4
Lamp End Seal and Lamp Holder
a.
The open end of the lamp sleeve shall be sealed by means of a
stainless steel nut which compresses an external sleeve O-ring
seal. The sleeve nut shall have a surface which allows a positive
hand grip for tightening and shall not require any tools for
removal.
b.
The lamp holder shall be held in place in such a way as to isolate
and seal the lamp from the module frame and other lamps in the
module. Should a lamp sleeve fracture, the seal shall prevent
moisture from entering the module frame and the electrical
connections to other lamps in the module. The lamp holder shall
incorporate UV resistant materials which prevent lamp sleeve from
touching steel.
2.2.4.5
UV Lamp Module Support Rack
Rack shall be stainless steel construction and shall not allow UV light to
radiate above the channel when the lamp modules are energized and fully
immersed in the effluent.
2.2.5
Lamp Array Configuration
a.
Horizontal lamp configuration shall be a uniform array with lamps
parallel to each other and to the flow. Lamps shall be evenly
spaced in horizontal and vertical rows with centerline spacings
equal in both directions. The single array pattern shall be
continuous and symmetrical throughout each reactor.
b.
Vertical lamp configuration shall be a staggered uniform array
with lamps parallel to each other, but perpendicular to the flow.
Lamps shall be evenly spaced with alternating rows offset by
one-half the uniform centerline spacing.
2.2.6
Water Level Control
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NOTE: If more than 1 channel is required, there
needs to be a positive method of flow distribution
to each channel. The downstream level control
device is designed to build-up negligible head at
peak flow rates and may not distribute flow equally
to all channels. The equipment manufacturer should
be consulted for recommended methods of flow
distribution in multiple channels.
Automatic Slide/Sluice Gates: These gates are
required, two per channel, if the UV system is to
operate in an automatic mode for multiple channel
configurations. These gates are not necessarily
supplied by the UV equipment manufacturer.
Additionally, it is the gate manufacturer's
SECTION 11376
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