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Purchase of intake screens for submersible propeller pumps and associated controls at Lake Shawnee


Location
Kansas
Publication Date
02/01/2019 06:30 AM EST
Closing Date
02/18/2019 03:00 PM EST
Issuing Organization
County of Shawnee
Solicitation Number
Description

Specifications include, but are not limited to: Shawnee County is soliciting sealed bids for purchase of 2 intake screens for submersible propeller pumps and associated controls for the Adventure Cove at Lake Shawnee. A. Manufacturer: Hendrick Screen Company of Owensboro, Kentucky, or pre-approved equal. B. Construction: Intake Screen shall be T shaped with circumferential slots that widen toward the inside of the cylinder. The screen surface wire shall be wedge wire cross-wire welded to an appropriate support member so as to provide necessary strength with minimal hydraulic resistance. C. Wire and Slot: The surface wire shall be 69s wedge wire. The screen slot opening shall be .125 inches. The open area for this slot opening shall be 64%. Slot size shall be controlled and continuously monitored during manufacture. D. Capacity: Each intake screen capacity shall be 2,500 GPM at a maximum local through slot velocity, due to water removal not to exceed 0.5 feet per second. At the design flow rate, the pressure drop through the surface of the clean screen shall not exceed 0.2 psi. The total pressure drop through the assembly shall not exceed 6 inches water. Hydraulic calculation verifying compliance to these criteria shall be provided with the submittal. E. Strength: Screen shall be capable of withstanding a differential hydrostatic pressure in excess of 10 ft and working depth of 10 feet of water. The design stress when determining strength shall be two thirds of the yield stress. Strength calculation verifying compliance to these criteria shall be provided upon request. F. Materials and Fittings: The screen shall be manufactured of 90% copper and 10% nickel material; the remainder of the assembly shall be type 304 stainless steel. The main outlet shall be a 20-inch plate flange with a bolt pattern equal to AWWA C-207, Table 1, Class B.

Source
http://www.snco.us/purchasing/bids.asp (opens in a new window)

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