Design and Construction Handbook - Los Angeles World Airports

Guide Specification
2.7 CHAINWHEELS
A. Manufacturers: Subject to compliance with requirements, available manufacturers offering
products that may be incorporated into the Work include, but are not limited to, the following:
1. Babbitt Steam Specialty Co.
2. Roto Hammer Industries.
3. Trumbull Industries.
B. Description: Valve actuation assembly with sprocket rim, brackets, and chain.
1. Brackets: Type, number, size, and fasteners required to mount actuator on valve.
2. Attachment: For connection to ball valve stems.
3. Sprocket Rim with Chain Guides: Ductile iron, of type and size required for valve. Include
zinc coating.
4. Chain: Hot-dip, galvanized steel, of size required to fit sprocket rim.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Install valves with stems upright or horizontal, not inverted.
B. Install brass male adapters each side of valves in copper piped system. Solder adapters to pipe.
C. Install valves with clearance for installation of insulation and allowing access.
D. Provide access where valves and fittings are not accessible.
3.2 VALVE APPLICATIONS
A. Install shutoff and drain valves at required locations.
B. Install ball butterfly or gate valves for shut-off and to isolate equipment, part of systems, or
vertical risers.
C. Install 3/4 inch gate ball valves with cap for drains at main shut-off valves, low points of piping,
bases of vertical risers, and at equipment.
D. Install butterfly or globe valves for throttling, bypass, or manual flow control services.
E. Install spring loaded check valves on discharge side of all water pumps.
F. Install check valves on discharge of all pumps.
G. Install lug end butterfly valves adjacent to equipment when functioning to isolate equipment.
GENERAL-DUTY VALVES FOR PLUMBING PIPING
22 05 23 - 7 Plumbing Systems