2.1.10
Valves
NFPA 13. Provide valves of types approved for fire service. Valves shall
open by counterclockwise rotation. Provide [a rising stem] [an OS&Y] [a
wall indicator] valve beneath each dry pipe valve. [Check valves shall be
[flanged] clear opening swing-check type valves with flanged inspection and
access cover plate for sizes [100] [200] mm [4] [8] inches [_____] and
larger.] [Provide OS&Y gate valve in piping to sprinklers protecting
elevator hoistways, machine rooms, and machinery spaces in accordance with
ASME A17.1.]
2.1.10.1
Backflow Preventers
Provide double check valve assembly backflow preventer with OS&Y gate valve
backflow preventer with OS&Y gate valve on both ends. Each check valve
shall have a drain. Backflow prevention assemblies shall have current
"Certificate of Approval" from the Foundation For Cross Connection Control
and Hydraulic Research FCCCHR List. Listing of the specific make, model,
design, and size in the FCCCHR List shall be acceptable as the required
documentation. Provide downstream of the backflow prevention assembly
listed hose valves with 2.5 inch 64 mm National standard male hose threads
with cap and chain. Provide one valve for each 250 gpm 16 l/s of system
demand or fraction thereof. Provide a permanent sign in accordance with
paragraph entitled "Identification Signs" which reads, "Test Valve."
2.1.10.2
Valve Supervision
Provide supervision of each control valve against closure and tampering in
accordance with NFPA 13. [Provide switch with SPDT (Form C) dry contacts
for the automatic transmittal of a supervisory signal over the facility
fire alarm system; minimum switch contact rating shall be 2.5 amperes at
24 VDC. A supervisory signal shall be initiated during the first two
revolutions of the hand wheel, or during the first 1/5th of travel distance
of the valve stem, from the full open position. Connection of the switch
shall be under Section [13852N INTERIOR FIRE DETECTION AND ALARM SYSTEM] [
13855N ANALOG / ADDRESSABLE INTERIOR FIRE ALARM SYSTEM].] [Provide
breakaway key operated locks and steel chains to secure all control valves
against unauthorized closure or tampering.]
2.1.11
Identification Signs
NFPA 13. Attach properly lettered and approved metal signs to each valve
and alarm device. [Permanently affix hydraulic design information sign to
the riser of each system.] For pipe schedule systems, provide a hydraulic
design information sign stating: This is a [light] [ordinary] [extra]
hazard pipe schedule system.
2.1.12
Inspector's Test Connection
Provide test connections approximately 2 meters 6 feet above the floor for
each sprinkler system or portion of each sprinkler system equipped with an
alarm device; locate at the hydraulically most remote part of each system.
Provide test connection piping to a location where the discharge will be
readily visible and where water may be discharged without property damage.
Provide discharge orifice of same size as corresponding sprinkler orifice.
Provide a precast concrete splash block under each exterior discharge
orifice.
SECTION 13935N
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