Section 15107 DIAPHRAGM VALVES

Section 15107

DIAPHRAGM VALVES

PART 1 - GENERAL

1.1 THE REQUIREMENT

A. The CONTRACTOR shall furnish and install diaphragm valves, complete and operable, as shown and specified herein including appurtenances and accessories, in accordance with the requirements of the Contract Documents.

1.2 RELATED WORK SPECIFIED ELSEWHERE

A. The requirements of the following sections and divisions apply to the Work of this section. Other sections and divisions of the Specifications, not referenced below, shall also apply to the extent required for proper performance of this Work.

1. Section 15100, Valves, General

2. Section 15101, Valve Operators

1.3 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS

A. All Work specified herein shall conform to or exceed the applicable requirements of the referenced portions of the following publications to the extent that the provisions thereof are not in conflict with other provisions of these Specifications.

B. Comply with the applicable editions of the following codes, regulations and standards.

1. Industry Standards:

ASME B16.5 Pipe Flanges and Flanged Fittings, NPS 1/2 through 24 Metric/Inch Standard

ASTM D 1784 Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated Poly(Vinyl Chloride) (CPVC) Compounds

2. Other Standards:

AWWA American Water Works Association

C. Comply with the applicable reference Specifications as directed in the General

Requirements and Additional General Requirements.

1.4 CONTRACTOR SUBMITTALS

A. Submittals shall be made in accordance with the General Requirements, Additional

General Requirements and as specified herein.

B. Submittals shall be made in accordance with Section 15100, Valves, General.

1.5 QUALITY ASSURANCE A. General:

1. All valves shall be tested in accordance with manufacturer's recommendation and applicable AWWA specifications.

2. Manufacturer with at least five years of experience in the type of equipment or service being provided.

1.6 WARRANTY

A. One year full product warranty by product manufacturer shall be provided.

PART 2 - PRODUCTS

2.1 EQUIPMENT REQUIREMENTS A. General:

1. All diaphragm valves shall be of the weir type with flanged ends, unless otherwise shown, suitable for throttling service and installation in any position. All valves shall have bubble-tight shutoff.

2. Polyvinyl chloride (PVC) valves shall have a pressure rating of 150 pounds per inch at 73 degrees F to 15 pounds per inch at 140 degrees F. The chlorinated polyvinyl chloride (CPVC) valves shall have a pressure rating of 150 pounds per inch at 73 degrees F to 40 pounds per inch at 210 degrees F.

3. Diaphragm valves for use with polymers shall be the full port, open-throat type. The valve body shall be 150-pound flanged end cast iron with a liner of polypropylene or other suitable plastic. The plastic liner shall have a minimum thickness of 3/16 inch. The diaphragm shall be Hypalon.

B. Manufacturers, Or Equal:

1. ASAHI/America.

2. Spears Mfg.

3. Georg Fischer Piping Systems.

4. Hayward Flow Control Systems.

2.2 CONSTRUCTION A. Body:

1. Unless otherwise shown, valve bodies shall be of PVC or CPVC, conforming to ASTM D 1784, as best suited for the individual service, with union ends or flanged ends conforming to ASME B16.5, 150 pounds per inch. The valves shall have flanged tops with position indicators.

2. Diaphragm valves on outlet and drain nozzles of storage tanks shall have cast iron or ductile iron bodies with plastic linings to best withstand the chemicals for which they are used.

B. Diaphragm: The diaphragms of all valves shall be of a chlorosulfonated polyethylene such as Hypalon, Or Equal, except that the diaphragms for valves in chlorine solutions and chlorine gas lines shall be Teflon.

C. Operator: Unless otherwise shown, all valves shall be handwheel-operated. Handwheels shall be made of suitable plastic material, or material with plastic coating. Where pneumatic or electric operators are specified or shown, they shall be furnished and assembled by the valve manufacturer, complete with limit switches, positioners, and accessories as a functional unit, unless otherwise shown.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Diaphragm valves shall be installed in all chlorine solution and chemical feed lines, between the appropriate storage tanks and points of application, and where otherwise shown on the Drawings.