Section 15100 VALVES, GENERAL

Section 15100

VALVES, GENERAL

PART 1 - GENERAL

1.1 THE REQUIREMENT

A. The CONTRACTOR shall provide all tools, supplies, materials, equipment, and labor necessary for furnishing, epoxy coating, installing, adjusting, and testing of all valves and appurtenant work, complete and operable, in accordance with the requirements of the Contract Documents. Where buried valves are shown, the CONTRACTOR shall furnish and install valve boxes to grade, with covers, extensions, and position indicators.

B. The provisions of this section shall apply to all valves and valve operators specified in the various sections of Division 15 of these Specifications except where otherwise specified in the Contract Documents. Valves and operators in particular locations may require a combination of units, sensors, limit switches, and controls specified in other sections of these Specifications.

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. Division 02, Site Work (applicable sections)

2. Section 09800, Protective Coating

3. Division 11, Equipment (applicable sections)

4. Section 15000, Piping, General

5. Section 15030, Piping Identification Systems

6. Section 15101, Valve Operators

7. Division 15, Mechanical (other applicable sections)

8. Section 16220, Electric Motors

9. Division 17, Instrumentation and Control (applicable sections)

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 B1.20.1 ASME B16.1 ASME B16.5	Pipe Threads, General Purpose (inch) Gray Iron Pipe Flanges and Flanged Fittings Pipe Flanges and Flanged Fittings, NPS 1/2
		through 24 Metric/Inch Standard
	ASME B31.1	Power Piping
	ASTM A 36	Standard Specification for Carbon Structural Steel
	ASTM A 48	Standard Specification for Gray Iron Castings
	ASTM A 126	Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings
	ASTM A 307	Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength
	ASTM A 536	Standard Specification for Ductile Iron Castings
	ASTM B 61	Standard Specification for Steam or Valve Bronze Castings
	ASTM B 62	Standard Specification for Composition Bronze or Ounce Metal Castings
	ASTM B 148	Standard Specification for Aluminum-Bronze Sand Castings
	ASTM B 584	Standard Specification for Copper Alloy Sand Castings for General Applications
	AWWA C500	Metal-Seated Gate Valves for Water Supply Service
	AWWA C503	Wet-Barrel Fire Hydrants
	AWWA C504	Rubber-Seated Butterfly Valves, 3 Inches (75 Millimeters) through 72 Inches (1,800 Millimeters)
	AWWA C507	Ball Valves, 6 Inches through 60 Inches (150 Millimeters through 1,500 Millimeters)
	AWWA C508	Swing-Check Valves for Waterworks Service, 2 Inches through 24 Inches (50-mm through 600- mm) NPS

AWWA C509 Resilient-Seated Gate Valves for Water Supply

Service

AWWA C510 Double Check Valve Backflow Prevention

Assembly

AWWA C511 Reduced-Pressure Principle Backflow

Prevention Assembly

AWWA C550 Protective Interior Coatings for Valves and

Hydrants

SSPC SP 5 White Metal Blast Cleaning

MSS SP-70 Gray Iron Gate Valves, Flanged and Threaded

Ends

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 General Requirements, Additional General Requirements and as specified herein. In addition to product information, the CONTRACTOR shall submit for acceptance layout drawings showing valve locations within the piping system, valve supports, and identification numbers.

B. The following submittals and specific information shall be provided.

1. Shop Drawings: Shop drawings of all valves and operators including associated wiring diagrams and electrical data, shall be furnished as specified in the General Requirements, Additional General Requirements and as specified herein.

2. The use of each valve configuration shall be indicated by listing in the submittal the valve identification numbers shown on the Drawings. Valves not shown on the Drawings shall be identified by a description of the uses and quantities.

1.5 QUALITY ASSURANCE A. General:

1. Valve Testing: Valves shall be shop tested per manufacturer's recommendations and applicable AWWA specifications prior to shipment. Manufacturer's certification that valves have been shop tested shall be submitted for acceptance 30 days prior to scheduled shipment.

2. Shop Inspection: Shop inspection of valve construction, testing and coating shall be witnessed by the ENGINEER and be subject to ENGINEER’s acceptance. All valves will be shop inspected unless otherwise waived in writing by the ENGINEER.

3. Warranty: Manufacturer’s warranty shall be included. Where actuators (electric, hydraulic or pneumatic) are used, valve manufacturer shall include the warranty for the actuators. Valve manufacturer will be held responsible for the valve and associated actuators.

PART 2 - PRODUCTS

2.1 VALVES

A. General: The CONTRACTOR shall furnish all valves, gates, valve-operating units, stem extensions, and other accessories as shown or specified. All valves and gates shall be new and of current manufacture.

B. Valve Flanges: The flanges of valves shall be in accordance with Section 15000, Piping, General.

C. Manual Operators: All shutoff valves, 6 inches and larger, shall have operators with position indicators. Where buried, these valves shall be provided with valve boxes and covers containing position indicators, and valve extensions. Unless otherwise indicated on the Drawings, valves located less than 6 feet above the floor shall be equipped with a lever-actuated or wheel-actuated operator, as indicated in the valve schedule. Shutoff valves mounted higher than 6 feet above working level shall be provided with chain operators. Chain operators shall have hot-dip galvanized chain extending to within 4 feet from the floor. Where chain operators are provided a “Chain Away” PVC chain storage canister shall be furnished. The canister shall have a screened bottom for drainage and a handle to pull the container down by extending the chain length out of the canister. Canisters shall be Model “Chain Away” by Babbitt STEAM SPECIALTY, Roto Hammer Industries, Or Equal.

D. Powered Valve Operators: Where shown, certain valves and gates shall be furnished with powered operators, provided by the valve or gate manufacturer. The same manufacturer shall furnish all operators of a given type. All valve operators, regardless of type, shall be installed, adjusted, and tested by the valve manufacturer at the manufacturing plant. Unless otherwise specified, all electric, pneumatic, and hydraulic valve operators shall be in accordance with Section 15101, Valve Operators.

E. Position Indicators: Valves 6 inches and larger shall have a clearly marked position indicator on the valve. The position indicator shall be clearly visible from a distance of at least 10 feet. Raised surfaces on a valve that clearly indicate position shall be painted a contrasting color. All quarter-turn operators shall be painted with contrasting markings to enhance the visibility of the valve position.

F. Valve Labeling: Except when such requirement is waived by the ENGINEER in writing, a label shall be provided on all shutoff valves exclusive of hose bibs. The label shall be as specified in Section 15030, Piping Identification Systems, and shall be permanently attached to the valve or on the wall adjacent to the valve as directed by the ENGINEER.

G. Nuts and Bolts:

1. All nuts and bolts on valve flanges and supports shall be steel, galvanized after fabrication. Steel for bolts shall be in accordance with the requirements of ASTM A 307, Grade A or B. Where exposed to water, sewage, sewer gas, submerged or buried, all nuts and bolts on valve flanges and valve bodies shall be Type 316 stainless steel.

2. Where dissimilar metals are bolted together, Type 316 stainless steel bolts shall be used.

H. Brass or Bronze: Unless otherwise specified, all interior bronze parts of valves shall conform to the requirements of ASTM B 62, or, where not subject to dezincification, to ASTM B 584. Brass or bronze used in the construction of any part of any valve in contact with sewage shall not contain more than 6 percent zinc nor any aluminum except that bronze stems may have not more than 1-1/2 percent aluminum and not more than

7 percent zinc.

I. Buried Valves and Valve Boxes: Valve boxes shall be of the cast-iron sliding adjustable Buffalo type. The valve shall be provided with a 2-inch-square operating nut and an extension to within 2 feet of the operating surface. The extensions shall be hot- dip galvanized after fabrication. One hot-dip galvanized operating tee wrench of approved size shall be furnished with each underground valve.

PART 3 - EXECUTION

3.1 VALVE INSTALLATION

A. General: All valves, gates, operating units, stem extensions, valve boxes, and accessories shall be installed in accordance with the manufacturer's written instructions and as shown and specified. All gates shall be adequately braced to prevent warpage and bending under the intended use. Valves shall be firmly supported to avoid undue stresses on the pipe.

B. Access: All valves shall be installed to provide easy access for operation without special tools or ladders, for removal and for maintenance, and to avoid conflicts between valve operators and structural members or handrails.

C. Valve Operators and Accessories:

1. Where combinations of valves, sensors, switches, and controls are specified, it shall be the responsibility of the CONTRACTOR to properly assemble and install these various items so that all systems are compatible and operating properly. The relationship between system elements shall be clearly described on shop drawing submittals.

2. Valves shall be installed so that when handles are moved from full open to full- closed position they shall clear all obstructions. If levers or handles impede access around valves, storage for removed levers or handles shall be provided on a nearby wall. Location and orientation of all valve operators shall be subject to the ENGINEER’s acceptance. Operators shall move through their entire range with no more than 40 pounds of applied force. For chain operators, mount cleats on walls as necessary to secure chain and to prevent interference in passageways or with equipment access. Arrangement shall be as indicated on the Contract Documents.

3. Valves shall be installed to present minimum hazard to personnel. Handwheels shall generally be between 24 and 54 inches above grade or floor. Horizontal, unguarded stems shall not be installed below 24 inches or between 54 and 75 inches above grade.

4. Handles for all valves 6 inches and larger shall be malleable iron or steel.

D. Field Testing: All valves shall be field tested following installation to demonstrate that the valve operates under field conditions in a manner consistent with the design of the system. All field testing of valves shall be witnessed by the ENGINEER and be subject to ENGINEER’s acceptance.

3.2 METHOD OF CONNECTION

A. Unless otherwise noted or indicated, all valves 2-1/2 inches and larger shall have flanged ends; all valves smaller than 2-1/2 inches shall have threaded ends, except valves in welded steel pipes shall be flanged. All valves installed in a given pipe shall be designed to withstand the test pressure, generally 1-1/2 times the working pressure for that particular pipe. All threaded-end valves shall be installed with unions within 6 inches from the threaded ends.

3.3 BURIED VALVES

A. All underground valves shall be installed with cast-iron valve boxes set over the valve with no weight bearing on the valve or pipe. Underground valves shall be given one coat of coal tar epoxy in the field during installation. This coating shall be protected from damage during installation and backfill. Coating shall be touched up before backfill.

3.4 POSITION INDICATORS

A. Valve operators and position indicators shall be installed and orientated to provide clear visibility from the nearest accessible operator work area and shall be subject to the ENGINEER’s acceptance.