Zone Valve Box Assemblies
- Complies with BFPA 99 requirements
- Cleaned for Oxygen service
- Full-port valves for high flow
- 18-gauge steel valve box
- Factory-installed copper tubing extensions
- Up to six valves in a single box
- Gauges ordered separately
Chemetron zone valve boxes shall be constructed of 18-gauge sheet steel with air dried lacquer finish.
The cover frame shall be made of anodized aluminum and attached to the box by concealed 1-1/2 in. (38mm)
screws. The finished assembly shall be substantially dust-tight. Frames for all valve boxed shall have uniform
width for balanced appearance, and shall allow for a maximum wall thickness of 1 in. The front
assembly shall contain an easily removable cover window with pull ring. The window shall conceal the piping and valves
inside the box and shall be labeled
"Caution - Medical Gas Shut-Off Valves - Close Only in Emergency." Placement of the valves within the zone valve box shall be such that
the removable window cannot be replaced when any valve is closed. Clear viewing space shall be provided in the window to
display the gas service, the are controlled by the valve, and the pressure gauges.
Single-valve boxes shall accept valve sizes through 3 in. Two and three-valve boxes shall accept valve sizes through
2 in. Four, five and six-valve boxes shall accept valve sizes through 1-1/4 in. Valves shall be factory installed with the
smallest valve at the top. Largest at the bottom.
Manufacturer shall provide color-coded self adhesive gas service labels for compliance with NFPA 99 labeling
requirements. The installing contractor shall apply labels to each valve within the assembly for proper gas service
identification, according to the manufacturer's instructions. Labels required to indicate area controlled shall be
furnished and installed by the installing contractor.
Design of the valve box shall be such that valves may be removed prior to brazing, without disassembly of the box,
to permit rearrangement of valves if necessary. Valves shall be ball type with Type K copper extensions,
cleaned for oxygen service, supplied with capped ends, and shall operate full open to closed position with 90
degree handle rotation (refer to Medical Gas Valve Specifications). The gauge port shall be equipped with removable plug
for pressure testing prior to final assembly of gauge.
Gauges shall be ordered separately.
All zone valve box assemblies shall read pressure downstream and vacuum upstream of the valve per NFPS 99.
Valves shall be piper left to right.
Typical Zone Valve Box Exploded View
(Three-valve box shown. Other arrangemenst similar.)
Installation Recommendation: Mounting height to be 50 in. (127 cm) above finished floor to
center line of valve box assembly.
Dimensional Data: One, Two & Three-Valve Boxes