SECTION_33_32_13.pdf

SECTION 33 32 13.13

PACKAGED SEWAGE LIFT STATIONS, WET WELL TYPE

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PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN WATER WORKS ASSOCIATION (AWWA)

AWWA C110/A21.10 (2012) Ductile-Iron and Gray-Iron Fittings for Water AWWA C500 (2009) Metal-Seated Gate Valves for Water Supply Service AWWA C509 (2009) Resilient-Seated Gate Valves for Water Supply Service AWWA C600 (2010) Installation of Ductile-Iron Water Mains and Their Appurtenances

1.2 SUBMITTALS

SD-02 Shop Drawings Plumbing System; Detail drawings consisting of schedules, performance charts, instructions, diagrams, and other information to illustrate the requirements and operations of systems that are not covered by the Plumbing Code. Detail drawings for the complete plumbing system including piping layouts and locations of connections; dimensions for roughing-in, foundation, and support points; schematic diagrams and wiring diagrams or connection and interconnection diagrams. Detail drawings shall indicate clearances required for maintenance and operation. Where piping and equipment are to be supported other than as indicated, details shall include loadings and proposed support methods. Mechanical drawing plans, elevations, views, and details, shall be drawn to scale.

SD-01 Preconstruction Submittals Material, Equipment, and Fixtures List

SD-02 Shop Drawings Fabrication Drawings Erection/Installation Drawings

SD-07 Certificates Listing of Product Installations

SD-11 Closeout Submittals Warranty

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

Submit fabrication drawings after receiving tentative approval of the equipment and the materials list but before installation. Submit drawings covering necessary or recommended changes to accommodate the equipment offered. Show on the drawings the design of the chamber, with dimensions, types, and thicknesses of materials, and elevation levels with reference to those elevations indicated. Submit erection/installation drawings for the manhole chamber with the required equipment and accessories.

2.2.6 Valves

2.2.6.1 Gate Valves in Valve Vault

Conform to AWWA C500 for gate valves with outside-screw-and-yoke rising-stem type with double disc gates and flanged ends. Conform to AWWA C509 for valves with outside-screw-and-yoke rising-stem type with flanged ends. Provide valves with handwheels that open by counterclockwise rotation of the valve stem. Bolt and construct stuffing boxes to permit easy removal of parts for repair. Use valves from one manufacturer.

2.2.6.2 Check Valves Less than 100 mm 4-Inch Diameter

Provide neoprene ball check valve with integral hydraulic sealing flange, designed for a hydraulic working pressure of 1.21 MPa 175 psi.

[2.2.6.3 Check Valves 100 mm 4-Inch and Larger Diameter Provide nonclogging swing check valve rated for not less than 1.21 MPa 175 psig working pressure capable of passing 76-mm 3-inch diameter solids.

Cast iron conforming to ASTM A126. Buna-N disc and integral seat. Flanged ends conforming to AWWA C110/A21.10.

]2.2.7 Piping Provide force mains in accordance with Section 33 34 00 FORCE MAINS AND

INVERTED SIPHONS; SEWER.

2.2.7.1 Piping Connections

Provide pump suction and discharge with flanged connections of the proper size for the pump type and capacity. Provide between pipes of dissimilar metals a rubber gasket or other approved type of insulating joint or dielectric coupling to effectively prevent metal-to-metal contact between adjacent sections of piping.

2.2.7.2 Accessories

Provide flanges, connecting pieces, transition glands, transition sleeves, and other adapters as required.

2.2.7.3 Flexible Flanged Coupling

Provide flexible flanged couplings applicable for sewage as indicated. Use flexible flanged coupling designed for a working pressure of 2.41 MPa 350

PART 3 EXECUTION

3.1 INSTALLATION

Install lift station as indicated, in accordance with drawings and the manufacturer's instructions. Dampen and isolate equipment vibration.

3.1.3 Valves

Install gate valves conforming to AWWA C500 in accordance with AWWA C600 for valve-and-fitting installation and with the recommendations of the Appendix ("Installation, Operation, and Maintenance of Gate Valves") to AWWA C500. Install gate valves conforming to AWWA C509 in accordance with AWWA C600 for valve-and-fitting installation and with the recommendations of the Appendix ("Installation, Operation, and Maintenance of Gate Valves") to AWWA C509.

Install check valves in accordance with the applicable requirements of AWWA C600 for valve-and-fitting installation. Make and assemble joints to gate valves [and check valves] as specified for making and assembling the same type joints between pipe and fittings.

3.1.4 Piping

Terminate discharge lines 1.5 meter 5-feet outside the lift station in flanged connections. Include the pipe from the wet well manhole in the suction line.

3.1.5 Miscellaneous

Attach a final as built drawing, laminated in mylar, to the inside of the front door and shown on the as-built drawings. Include a list of all legends. Identify the pump nameplate data on the drawing and on the as-built plans.

Permanently mark all component parts in the control panel and identified as they are indicated on the drawing. Mark on the back plate adjacent to the component. Identify all control conductors with wire markers at each end as close as practical to the end of conductor.

3.3 CLOSEOUT ACTIVITIES

3.3.1 Operation and Maintenance

Submit preventative maintenance and inspection procedure for package lift stations. Include in procedures the frequency of preventative maintenance, inspection, adjustment, lubrication, and cleaning necessary to minimize corrective maintenance and repair.

Supply special tools that are required for maintenance and testing of the package lift stations.

Submit spare parts data, including a complete list of parts and supplies with current unit prices and source of supply. List parts and supplies that are either normally furnished at no extra cost with the purchase of equipment, or specified to be furnished as a part of the contract, and list additional items recommended by the manufacturer to ensure an efficient operation for a period of one year.

Install on or near the package lift stations, a complete package of posted instructions, consisting of labels, signs, and templates of operating instructions.

Submit operation and maintenance manuals for package lift stations, including Equipment Description, Assembly and Installation Procedures, Adjustment and Alignment, Checkout Procedures, Procedures of Operation and Troubleshooting.