SECTION 16110F
SECTION 15420
PLUMBING VALVES
PART 1 - GENERAL
1.01 WORK INCLUDED
A. Comply with Division, General Requirements and all documents
referred to therein.
B. Provide and install all valves as indicated on the Drawings
and as specified.
1.02 SUBMITTALS
A.Shop Drawings and Product Data:
1.Refer to General Requirements and Section 15010 for procedure
and additional submittal requirements.
2.Furnish shop drawings and product data for valves.
PART 2 - products
2.01 GENERAL
A.Provide valves of same manufacturer for all plumbing systems,
including valves furnished with equipment.
B.For copper tubing, provide solder-joint valves, or
IPS-to-Copper adapter, sized for use with tubing and respective
valve.
C.For flanged valves, provide companion flanges of same PSI
rating-class of valve being used.
D.Provide valves rated not less than 16 bar working pressure for
plumbing systems unless indicated otherwise.
E.Provide valve materials suitable for service and temperature
of respective systems, especially with respect to discs, plugs,
balls, linings, gaskets, and lubricants of globes valves, plug
cocks, ball valves, etc.
F.Provide valves at points shown and as required for complete
isolation of equipment, branches off mains arranged so as to give
complete and regulation control of piping systems throughout the
building. Install valves, with neat appearance and grouping, so
that all parts are easily accessible for maintenance.
G.Provide valves as specified in valve schedule below. Figure
numbers listed are given as standard for type and construction.
Valves for similar service shall be of one manufacturer, including
valves furnished with equipment.
H.Provide composition discs for bronze globes, angles or checks.
Provide bronze discs for IBBM globes, angles, or checks except
where otherwise specified or approved at recommendation of the
manufacturer.
I.Wheel handles to be non-heating style cast from malleable iron
ASTM A197.
J.Mark each valve at the factory with the following minimum
information, engraved, stamped or cast on each valve or metal tag
permanently attached to the valve.
1.Manufacturer's name.
2.Catalog or Figure number.
3.Size and pressure class.
4.Arrows shall indicate direction of flow on check, globe,
angle, non-return and eccentric plug valves.
5.Valves for fire protection systems shall be UL approved and
shall bear the UL label.2.02 VALVES TAGS AND CHARTS
A.Provide valve identification in accordance with Section 15010
and 15190.
2.03 SAFETY AND RELIEF VALVES
A.Consolidated or Watts, type and size as applicable,
constructed and rated in accordance with ASME, and so stamped.
B.Use Temperature and Pressure Relief valves for water heaters
set with temperature relief at 210 F, Watts Model (40XL).
C. Valves shall have capacity to relieve maximum possible
generated energy while maintaining pressure in protected equipment
at no more than 10 percent above vessel working pressure.
D.Drain from relief valves shall spill to adjacent floor drain
or to mop receptor.
2.04 VALVE SCHEDULES
Description
1.Gate Vales:
50 mm or smaller
bronze body and wedge, with soldered brazed or threaded ends to
suit. Rising stem type with a union bonnet.
65 mm and largerflanged iron body, bronze mounted, bronze stem,
OS&Y, TFE imp.
2. Butterfly Valves:
65 mm through 150 mm with flanged
end body for all services up to and
including 2,000 kPa. Valve body shall
be Bronze.
Valves
shall be bi-directional and provide
bubble-tight shut-off and dead-end
service at full rated working pressure. Disc seal (EPDM) shall
be rated for service up to 100 degrees C.
3.Globe Valves:
50 mm and smaller,
bronze body, screwed ends, rising
stem, TFE imp. Stem material to
ASTM B62.
65 mm and larger,
flanged iron body bronze mounted,
bronze rising stem, TFE imp.
asbestos-free packing.
4.Ball Valves:
6 mm to 50 mm WOG bronze body, screwed ends,
teflon seats and seals..
5.Check Valves:
50 mm and smaller
bronze
body, screwed ends, swing type.
65 mm and larger
iron body,
bronze mounted, flanged, swing type.
Provide silent, double center guided, conical spring type silent
check valve on pumps discharge.
6.Gas cocks, AGA approved, UL listed:
Line valves 50 mm and
smaller, square head,
cock wrench bronze.
Line valves 65 mm and larger, short pattern, lubricated plug,
including operating wrench.
7.Air vent (manual):
Same as gate valve (50mm and below)
8.Bib taps:
Brass for gardens, planters and plantrooms. Chrome plated or
stainless steel for sinks in kitchens and utilities rooms.
9.Strainers:
For 50 mm and below, Y-type with stainless steel screen, 26 swg
with 0.8 peforations. Screwed ends.
For above 50 mm, Y-type sinle basket. 20 mesh stainless steel
screen, bolted cover. Flanged end.
2.05 FLOW METERING AND BALANCING VALVES
A.Provide as indicated on drawings preso B-Plus series flow
metering and balancing value. Valve shall be installed on hot water
return piping.
2.06 BACKFLOW PREVENTERS
A.Reduced pressure principle, conforming to AWWA C506 and ASSE
Standard 1013.
B.Complete assembly with two spring-loaded toggle lever check
valves, automatically operating pressure differential relief valve,
shut-off valves and test cocks. All internal parts of check and
relief valves must be removable or replaceable without removal of
the unit from the line.
C.On domestic water service: Epoxy coated cast iron check valve
bodies with bronze check seat and stainless steel relief valve
seats. Install and maintained in accordance with DEWA
requirements.
2.07 DOUBLE DETECTOR CHECK VALVE
A.UL listed, FM approved epoxy coated ductile iron, check valve
bodies with bronze replaceable seats, 300 series stainless steel
chemically resistant rubber check valve disc, stainless check
components cover bolts, 1,100 kPa, with meter on bypass. Install
and maintain in accordance with DEWA and Civil Defence Regulations.
Cross-Connection Control, Department of Health and Water Authority
requirements.
B.Provide on fire standpipe and sprinkler services.
2.08 PRESSURE REDUCING VALVE SET
A. Each pressure reducing valve set shall be completed with
pressure reducing or pressure regulating valve, isolating valves,
pressure gauges on inlet and outlet, pressure relief valve on
outlet and filter on inlet.
B. Each pressure reducing valve shall contain loading neoprene
diaphragm and a full floating, self aligning, ignition resistant
seat and shall be of the single stage, pressure reduction type with
provision for manually adjusting the delivery pressure. The valve
shall fail safe to the low pressure.
C. Valves shall be capable of operating at the maintaining
automatically the respective delivery pressure and flow rates as
indicated and shall not be liable to creep. Valves shall also be
capable of maintaining the pre-set down stream pressure under
static condition.
D. The filter one ach inlet to a pressure reducing valve shall
be of replaceable porous sintered metal type.2.09 PRESSURE RELIEF
VALVESA. Each pressure relief valve shall be of the fully enclosed
type and fitting with hand easing gear.
B. Each pressure relief valve in a pressure reducing station
shall have a flow capacity equal to that of the pressure reducing
valve.
C. Pressure relief valves in locations other than reducing
stations shall have flow capacities equal to that of the associated
equipment.2.010 SOLENOID VALVESA. Each solenoid valve shall be of
the packless type with coils wound for 230 volt AC operation and
requiring power to open and of adequate capacity to ensure that the
valve shall open with maximum pressure differential that will be
encountered in the installation.
B. Each valve shall have a bronze body screwed to BS 21,
stainless steel disc and stainless steel seat unless indicated
otherwise for the service.
C. Solenoid valve shall be installed strictly in accordance with
the manufacturers instructions.
D. The valve shall be suitable for the system working pressure
and of minimum PN 16.2.011 MOTORISED VALVES (ELECTRIC)A. Provide
for each valve, as indicated in the drawings, electric motorized
valve operator (or actuator), attached to and supported by valve.B.
Mount valve operators at factory or at site under manufacturers
supervision.C. Provide manual override which allows manual
operation in the event of power failure. Provide limit switches to
give remote indication of valve/actuator piston position. Limit
switches shall be of quick-break type, capable of being accurately
and closely set, and mechanically connected to moving valve at all
times following its position.D. Position indicating lights at
control panel or control console shall operate as follows:
1. Red light glows when valve is completely closed;
2. Green light glows when valve is completely open;
3. Both lights glow when valve is neither completely open or
closed. When valve is stopped in an intermediate position or when
valve is travelling from one position to another.
4. Electrical connections, disconnect switches, conduit and
power wiring for motors and remote push buttons and indicating
lights shall be provided in this Contract.
PART 3 - EXECUTION3.01 INSTALLATION
A.Provide all equipment with shutoff valves. Provide all valves
strainers, check valves, except control valves and unless
specifically sized, of same size as the pipes in which they are
installed unless otherwise indicated. Provide fixture stops.
B.All hand-controlled line valves are to be gate, ball or
butterfly valves, except where throttling control or frequent
operation is required, provide globe or angle valves, unless
otherwise shown or specified. Install all globe and angle valves to
close against the pressure.
C.Position gate valves so that stems are in any suitable angle
from horizontal to upright position. Install valves only in
accessible locations. Do not install valves with stems pointing
downwards unless specifically indicated.
D.Wherever possible, install valves accessible from floor level.
Provide operating handles for all valves and cocks. Provide
adequate clearance for easy operation.
E.Support line valves at the valve in addition to regularly
spaced pipe supports shown and specified.
F.Provide drain valves and hose adapters at all low points,
etc.
G.Install swing checks and gravity closing lift checks in
horizontal position.
H.Provide discharge pipe from all relief and safety valves.
Extend to over approved drain receptacle with air gap.
I.Provide ball valves to isolate shock absorbers.
J.Provide open-ended line valves with plugs or blind
flanges.
K.Where required for access provide access doors in accordance
with Section 15010.
3.02 TESTING
A.Test valve bonnets for tightness. Test operate valves from
closed-to-open-to-closed position while valve is under test
pressure.
B.Test automatic valves including solenoid, pressure relief
valves, safety valves and temperature and pressure relief valves
for proper operation at settings indicated.
C.Insure that valves are field checked for packing and lubricant
and that disc is for service intended. Replace leaking packing.
Service valves which do not operate smoothly and properly with
suitable lubricant before placing in operation.
D.Test relief valves, safety relief valves, safety valves and
temperature and pressure relief valves three times.
END OF SECTION
Burj Dubai Dubai Mall Hotel, Dubai, United Arab Emirates
Plumbing Valve
MEP Spec-For Construction (Date of Issue: Jan 2006)
15420.5
