Section 15116 TELESCOPING VALVE

Section 15116

TELESCOPING VALVE

PART 1 – GENERAL

1.1 THE REQUIREMENT

A. The Contractor shall provide telescoping valve, complete with valve stand, rack and pinion adjusting mechanism, guide pipe and bail, slip pipe and bail and companion flange, spare parts and appurtenances in accordance with the Contract Documents.

1.2 REFERENCE SPECIFICATIONS, CODES AND STANDARDS

A. The work of the following sections applies to the work of this Section. Other sections of the Specifications, not referenced below, shall also apply to the extent required for proper performance of this work:

1. General Conditions

2. Section 15100, Valves, General

3. Section 15101, Valve and Gate Operators

1.3 SUBMITTALS

A. In addition to the requirements of Section 15100 and the material listed in the detailed specification, the following shall be submitted in accordance with Section 01300:

1. Complete assembly and installation drawings showing dimensional layout, materials of construction, applicable material standards, equipment details and appurtenances.

2. Manufacturer literature and catalog cut sheets.

3. Manufacturer’s installation instructions.

4. Manufacturer’s O&M manuals as specified in Section 01300.

PART 2 – PRODUCTS

2.1 PERFORMANCE AND DESIGN REQUIREMENTS A. Digester Supernatant Telescoping Valve

1. General

a. Number of Units: 1 b. Location: Digester 2

c. Service: Digested Sludge

2.2 GENERAL

A. Valve Stand and Operator

1. Valve stand shall be of heavy cast iron construction with base mounting flange, operating crank handle, cut steel rising rack, cut steel pinion, and rack stop.

2. A stainless steel guide pipe shall connect the rack to the bail that connects to the slip pipe.

3. The pinion gearing shall be designed so that each complete revolution produces a valve travel of approximately 4-3/4 inches.

B. Guide Pipe and Bail: Guide pipe and bail shall be made from Type 304 stainless steel.

One end of the guide pipe shall thread into the bottom of the rack while the other end threads into the bail.

C. Slip Pipe: The slip pipe shall be fabricated from Type 304 stainless steel tubing. Top of pipe shall have a V-notch weir for flow control. The length of the pipe shall be sufficient to allow the full required travel with an additional 6 inches remaining below the companion flange to provide adequate support. The slip pipe shall be bolted to the bail.

D. Companion Flange: Manual telescoping valve shall be furnished with a type 304 stainless steel companion flange designed to match a stainless steel pipe flange and bored with sufficient clearance to allow the slip tube to slide but no sludge to escape. Each companion flange shall be furnished with two (2) sealing gaskets of Neoprene rubber having an inner diameter slightly smaller than the outer diameter of the slip tube. The Contractor shall furnish the companion flange mounting bolts.

1. The Contractor shall accept unit responsibility to ensure that fabrication of the supernatant box mounting flange and telescoping valve companion flange are compatible.

2.3 ANCHOR BOLTS, EMBEDDED ITEMS, AND FASTENERS

A. All anchor bolts, anchor sleeves, fasteners, hardware and embedded items shall be type

316 stainless steel and conform to the requirements of Section 05500.

2.4 PROTECTIVE COATINGS

A. All equipment and piping shall be coated in accordance with Section 09800.

2.5 MANUFACTURERS

A. Telescoping valves shall be manufactured by one of the following:

1. Amwell

2. Or Approved Equal

PART 3 – EXECUTION

3.1 DELIVERY, STORAGE AND HANDLING

A. All equipment and parts shall be properly protected so that no damage or deterioration will occur during a prolonged delay from the time of shipment until installation is completed and the units and equipment are ready for operation.

B. All equipment and parts shall be properly protected against any damage during a prolonged period at the site.

3.2 INSTALLATION

A. Verify that dimensions are correct and project conditions are suitable for installation. Do not proceed with installation until unsatisfactory conditions have been corrected.

B. Install the telescoping valve in accordance with manufacturer's instructions. Adjust to provide smooth operation.

C. If the gate does not function properly to the satisfaction of the Resident Project Representative, The Contractor shall necessary modification and corrections at not additional cost to the District.

END OF SECTION