220523.pdf

DCFT #082207

Hanson #03S1408GGB

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GENERAL DUTY VALVES FOR

PLUMBING PIPING

DIVISION 22 – PLUMBING

SECTION 220523 – GENERAL DUTY

VALVES FOR PLUMBING PIPING

PART 1 - GENERAL

1.1 WORK INCLUDES

A. Base Bid:

1. Plumbing Contractor Provide:

a. All valves and accessories required for the plumbing systems shown on the drawings and described within these specifications.

1.2 RELATED WORK

A. Specified elsewhere:

1. 220700 - Plumbing Insulation.

2. 221116 – Domestic Water Piping.

3. 221119 - Domestic Water Piping Specialties.

4. 224000 - Plumbing Fixtures.

1.3 QUALITY ASSURANCE

A. American Society of Mechanical Engineers (ASME) Compliance: Comply with ASME B31.9 for building services piping and ASME B31.1 for power piping.

B. Manufacturers Standardization Society of the Valve and Fittings Industry (MSS) Compliance:

Comply with the various MSS Standard Practices referenced.

1.4 SUBMITTALS

A. Submit in accordance with Section 013300.

B. Product Data: Manufacturer’s product data indicating make, model, location, type, size, temperature and pressure rating for all items specified in this section. Also indicate dimensions and required clearances and installation instructions.

1.5 OPERATION AND MAINTENANCE DATA

A. Submit operation data in accordance with Section 017823.

B. Include manufacturer’s descriptive literature, operating instructions, maintenance and repair data, and parts listing.

C. Provide annual test tag for all Backflow Preventers.

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1.6 DELIVERY, STORAGE AND HANDLING

A. Preparation For Transport: Prepare valves for shipping as follows:

1. Ensure valves are dry and internally protected against rust and corrosion.

2. Protect valve ends against damage to threads, flange faces, and weld-end preps.

3. Set valves in best position for handling. Set globe and gate valves closed to prevent rattling; set ball valves open to minimize exposure of functional surfaces; set butterfly valves closed or slightly open; and block swing check valves in either closed or open position.

B. Storage: use the following precautions during storage:

1. Do not remove valve end protectors unless necessary for inspection; then reinstall for storage.

2. Protect valves from weather. Store valves indoors. Maintain valve temperature higher than the ambient dew point temperature. If outdoor storage is necessary, support valves off the ground or pavement in watertight enclosures.

C. Handling: Use a sling to handle valves whose size requires handling by crane or lift. Rig valves to avoid damage to exposed valve parts. Do not use handwheels and stems as lifting or rigging points.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Manufacturer: Subject to compliance with requirements, the following are provided as examples of the salient characteristics to be found in the submitted product. Manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

1. Crane.

2. Grinnell.

3. Hammond.

4. Nibco.

5. Lunkenheimer.

2.2 VALVE FEATURES, GENERAL

A. Valve Design: Rising stem or rising outside screw and yoke stems:

1. Nonrising stem valves may be used where headroom prevents full extension of rising stems.

B. Pressure and Temperature Ratings: As scheduled and required to suit system pressures and temperatures.

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C. Sizes: Same size as upstream pipe, unless otherwise indicated.

D. Operators: Provide the following special operator features:

1. Handwheels, fastened to valve stem, for valves other than quarter turn.

2. Lever handles, on quarter-turn valves 6 in. (152.4 mm) and smaller, provide one (1) wrench for every ten (10) valves.

E. Extended Stems: Where insulation is indicated or specified, provide extended stems arranged to receive insulation.

F. Bypass and Drain Connections: Comply with MSS SP-45 bypass and drain connections.

G. End Connections: As indicated in the valve specifications:

1. Threads: Comply with ANSI B1.20.1.

2. Flanges: Comply with ANSI B16.1 for cast iron, ANSI B16.5 for steel, and ANSI B16.24 for bronze valves.

3. Solder-Joint: Comply with ANSI B16.18:

a. Caution: Where soldered end connections are used, use solder having a melting point below 840°F (448.9o C). for gate, globe, and check valves; below 421°F (216.1o C). for ball valves.

2.3 BALL VALVES

A. Ball Valves (single fixture and equipment isolation), 1 in. (25.4 mm) and Smaller: MSS-ST 110; Rated for 150 psi (1,034.2kPa) saturated steam pressure, 400 psi (2757.9 kPa) WOG pressure; two-piece construction; with brass body, standard port, chrome-plated brass ball, “Teflon” or “TFE” seats and seals, blowout-proof stem, and vinyl-covered steel handle.

Provide solder ends for domestic hot, tempered and cold water distribution; threaded ends for gas and for equipment requiring threaded ends.

B. Ball Valves (multi-fixture isolation valve) 2 in. (50.8 mm) and Smaller: MSS-ST 110; rated for

150 psi (1,034.2 kPa) saturated steam pressure, 600 psi (4,136.9 kPa) WOG pressure; two-piece construction; brass body full port, chrome-plated brass ball, “Teflon” or “TFE” seats and seals, blowout-proof stem, and vinyl-covered steel handle. Provide solder ends for domestic hot, tempered, and cold water distribution; threaded ends for gas piping.

C. Ball Valves, 2 in. (50.8 mm) through 3 in. (76.2 mm): MSS-ST 110; ASTM B584-C84400 min., rated for 150 psi (1,034.2 kPa) saturated steam pressure, 600 psi (4,136.9 kPa) WOG pressure;

3-piece construction; with bronze body, full port 2 in. (50.8 mm) and 2-1/2 in. (63.5 mm) standard port for 3 in., chrome-plated brass ball, “Teflon” or “TFE” seats and seals, blowout proof stem, and vinyl-covered steel handle. Provide solder ends for domestic hot, tempered and cold water distribution; threaded ends for gas piping.

D. NOTE: Ball valves used as water service shut-offs shall be 3-piece construction as specified above.

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2.4 CHECK VALVES: Swing Check Valves, 2 in. (50.8 mm) and Smaller: MSS SP-80; Class 125, cast-bronze body and cap conforming to ASTM B 62; with horizontal swing, Y-pattern, and bronze disc; and having threaded or solder ends. Provide valves capable of being reground while the valve remains in the line. Provide Class 150 valves meeting the above specifications, with threaded end connections, where system pressure requires or where Class 125 valves are not available.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine valve interior through the end ports for cleanliness, freedom from foreign matter, and corrosion. Remove special packing materials, such as blocks used to prevent disc movement during shipping and handling.

B. Actuate valve through an open-close and close-open cycle. Examine functionally significant features, such as guides and seats made accessible by such actuation. Following examination, return the valve closure member to the shipping position.

C. Examine threads on both the valve and the mating pipe for form (i.e. out-of-round or local indentation) and cleanliness.

D. Examine mating flange faces for conditions that might cause leakage. Check bolting for proper size, length, and material. Check gasket material for proper size, material composition suitable for service, and freedom from defects and damage.

E. Prior to valve installation, examine the piping for cleanliness, freedom from foreign materials, and proper alignment.

F. Replace defective valves with new valves.

3.2 VALVE ENDS SELECTION

A. Select valves with the following ends or types of pipe/tube connections:

1. Copper Tube Size, 3 in. (76.2 mm) and Smaller: Solder ends.

2. Steel Pipe Sizes, 2 in. (50.8 mm) and Smaller: Threaded end.

3. Steel Pipe Sizes 2-1/2 in. (63.5 mm) and Larger: Flanged.

3.3 VALVE INSTALLATIONS

A. General Application: Use gate, ball, and butterfly valves for shut-off duty; globe, ball, and butterfly for throttling duty.

B. Locate valves for easy access and provide separate support where necessary.

C. Install valves and unions for each fixture device, specialty, or item of equipment arranged to allow equipment removal without system shutdown. Unions are not required on flanged devices.

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D. Provide interior shut-off and drain valve on each branch to wall hydrant or hose bibb.

E. All valves are not shown on the contract documents. Provide valves where required to adequately service all parts of systems and equipment in addition to those shown on the Contract Documents.

F. Install valves in horizontal piping with stem at or above the center of the pipe.

G. Install valves in a position to allow full stem movement.

H. Installation of Check Valves: Install for proper direction of flow as follows:

1. Swing Check Valves: Horizontal position with hinge pin level.

3.4 SOLDER CONNECTIONS

A. Cut tube square and two (2) exact lengths.

B. Clean end of tube to depth of valve socket with steel wool, sand cloth, or a steel wire brush to a bright finish. Clean valve socket in same manner.

C. Apply proper soldering flux in an even coat to inside of valve socket and outside of tube.

D. Open gate and globe valves to full open position.

E. Remove the cap and disc holder of swing check valves having composition discs.

F. Insert tube into valve socket, making sure the end rests against the shoulder inside valve. Rotate tube or valve slightly to ensure even distribution of the flux.

G. Apply heat evenly to outside of valve around joint until solder will melt upon contact. Feed solder until it completely fills the joint around tube. Avoid hot spots or overheating valve.

Once the solder starts cooling, remove excess amounts around the joint with a cloth or brush.

3.5 THREADED CONNECTIONS

A. Align threads at point of assembly.

B. Apply appropriate tape or thread compound to the external pipe threads (except where dry seal threading is specified).

C. Assemble joint, wrench tight. Wrench on valve shall be on the valve end into which the pipe is being threaded.

3.6 FLANGED CONNECTIONS

A. Align flange surfaces parallel.

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B. Assemble joints by sequencing bolt tightening to make initial contact of flanges and gaskets as flat and parallel as possible. Use suitable lubricants on bolt threads. Tighten bolts gradually and uniformly.

C. For dead-ends service, butterfly valves require a blind flange on the downstream side of the valve for proper shutoff and retention.

3.7 FIELD QUALITY CONTROL: Tests: Perform test in witness of and have certified by local governing authority for annual inspection certificate. After piping systems have been tested and put into service, but before final adjusting and balancing, inspect valves for leaks. Adjust or replace packing to stop leaks; replace valves if leak persists.

END OF SECTION 220523