E-mail jerry@freeflowinc.com Phone 800-933-4818 or 402-332-4818 Fax 402-332-3036
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There shall be supplied a Free Flow Model SC Parshall flume with a throat width of ______inches and sidewall height ("E" dim.) of ______inches. Flume to be molded in one piece of reinforced polyester fiberglass with 1/4' minimum wall thickness. Wetted surfaces shall have smooth white gel-coat finish; exterior surfaces shall have gel-coat finish & "V" shaped reinforcing ribs to prevent distortion during shipment, installation and operation. Flume shall be self supporting and require no external supporting structure during installation. Internal dimensions shall conform to the latest revision of the WATER MEASUREMENT MANUAL, published by the U.S. Dept. of the Interior, Water and Power Resources Service. Head gauges: Head gauges shall be flush molded into flume sidewall at time of manufacture. Gauge markings shall be protected by a 1/16" clear fiberglass laminate. Gauges at Ha position shall have markings in both depth & flow. Gauges at Hb position shall have markings in depth only. Depth markings shall be_____ (inches or ft.). Flow markings shall be _____ (GPM or MGD). Anchor clips: There shall be provided fiberglass anchor clips permanently attached to flume exterior. Clips shall have 1/2' dia. hole for wire securing flume to reinforcing bar embedded in concrete. Ultrasonic Transducer Mounting Bracket: There shall be supplied with the flume, an elevation adjustable bracket, fabricated from 316 SS piping & alloy fittings with a ______ female NPT conn. to the transducer. All fasteners shall be stainless steel. Bubbler tubes: There shall be provided a flush mounted bubbler tube of 1/2" O.D. at the H measuring station. Bubbler tube opening shall be set in flume wall such that water depths down to zero flow may be measured. Sensor Cavity & "Z" Bracket: There shall be provided a sensor cavity and stainless steel 'Z" bracket to allow flush mount installation and easy removal of a submerged pressure sensor manufactured by ____ . The bracket, cavity & sidewall "D" track shall allow routing the cable out of the flume with the bracket, sensor and cable all flush with flume wall & floor. There shall be a permanently attached stilling well of (8" or 12") diameter at H (& Hb) positions. The well shall extend (4" or 6") below the crest of the flume. The connecting port shall be a 2" dia. hole with a passage length of not longer that 3/4". The well shall have a top flange to facilitate the installation of depth gauging equipment. Inlet & Outlet Adapters: There shall be provided an inlet and outlet adapter of the
same materials of construction and finish as the flume. The adapters shall be provided
with: The inverts of the pipe stub end connections on the inlet and outlet adapters shall be
set per the engineer's specified elevations. |
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