WA9302A-SP 960223 SUBMITTAL PREPARED FOR:
VILLAGE PARKWAY PUMP STATION
COPPELL, TEXAS
EQUIPMENT:
TAPPING GATE VALVES
SPECIFICATION SC.31
ENGINEER:
SHIMEK, JACOBS AND FINKLEA
8333 DOUGLAS AVENUE, SUITE 820
DALLAS, TEXAS 75225
CONTRACTOR:
NORTH TEXAS MUNICIPAL CONSTRUCTION COMPANY
5614 DRYER STREET
DALLAS, TEXAS 75206
MANUFACTURER:
M&H VALVE COMPANY
ANNISTON, ALABAMA 36201
SUPPLIER:
WATER AND WASTE MANAGEMENT ASSOCIATES
2550 MIDWAY ROAD, SUITE 230
CARROLLTON, TEXAS 75006
(214) 250-0550
February 22, 1996
Submittal Data
Project: Village Parkway P.S.
Location: Coppe11, Tx.
Engineer: Shimek, Jacobs, & Finklea
Contractor: N. Texas Municipal Construction
Product Type: Tapping Gate Valves
Size Description
16" M & H Tapping Gate valves w/2" nut
operator.
12" Same as above.
4" Same as above
[] REJECTED [] REVISE AND RESUBMIT
[] SUBMIT SPECIFIED ITEM
Checking is only for r!'--':l:'r;~', cnrfformsnce with the design
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CONSULTING ENG~N;ZERS DALLAS, ~EXAS
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M&H AWWA C500 & C509 Tapping Valves
%~Style 751 - IBBM, Double Disc
~ I Style 275~ IBBM, ""~""'~ ""~ '~ ....':"*"" Dos~ )
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All M&H Tapping Valves are flanged on one end lor bolted
connection to throat flange of tapping sleeve. Centering
rings are provided on valve flange lot mating with tapping
sleeve flange and are industry standardized through 12".
Tapping valve outlet ends for attaching tapping machine are
available with either mechanical joint or asbestos cement ,~ "L.,~
joints. valves 4'-12" are rated for 200 psi working pressure
and are tested hydrostatically to 400 psi. 14"-24" valves _-,
have rated working pressure o1150 psi and are tested Io 300
psi. O-Ring stem seals are standard on NRS valves. Large
size tapping valves can be equipped with bevel or spur ,
gearing, rollers, tracks & scrapers and by-pass valves.
Style 751 Tapping Valves are non-rising stem. double disc, ,,.~..,~q t~ ,
parallel seat, iron body. bronze mounted. Wedging system is
three point design using two bottom wedges and one top ~ ~2" t' "' ' ". '
wedge. Where required. the Style 751 can be furnished j~~:~.~ f.~~
OS&Y. Standard coating is asphalt varnish. Other coatings
are available. Size range is 4" thru 24". Meets AWWA C500.
Style 2751 Tapping Valves are metropolitan pattern i.e., side ,
wedging. They are iron body, bronze mounted, non-rising
stem, double disc, parallel seating. Asphalt varnish coating
is standard. Other protective coatings can be lurnished
Metropolitan pattern tapping valve sizes are 4" thru 24". STYLE 751 MECHANICAL JOINT TAPPING VALVE SHOWN
Corjnplies to AWWA C500. WITH STYLE 1174 TAPPING SLEEVE
Style 4751 Resilient Seat Tapping Valves are available in
· 4"-12" size with non-rising stem, meeting AVVWA C509. The
wedge is completely encapsulated with a special SBR
compound which is vulcanized to the wedge. Body and
bonnet are coated with factory applied fusion bonded
epoxy. STYLE 4751 M.J. RESILIENT
TAPPING VALVE WITH
, ~L~..,_j~ STYLE 974 TAPPING SLEEVE.
,!.
STYLE 2751
METROPOLITAN PATTERN
TAPPING VALVE
Section 2
Page 1
(2 SUGGESTED SPECIFICATIONS FOR:
M&H AWWA Double Disc Tapping Valves
[] Styles 751-NRS
[] Sizes 4" Through 24"
M&H Valve Co. [] Water Service
ANNISTON, ALABAMA
GENERAL Tapping valves shall be ol the double disc parallel seat, iron body, bronze mounled bottom
wedge type. They shall comply with the American Water Works Association Gate Valve Standard
C-500 as latest revised.
RATING Tapping Valves shall be rated at 200 psi water working pressure with 400 psi hydrostatic test lot
slructural soundness for 4" Ihrough 12" and 150 psi water working pressure with 300 psi
hydrostatic tesl for slruclural soundness in sizes 14" ihrough 24".
Testing shall be conducted in accordance with AWWA C-500.
END All valves through 12" shall mate all sleeves through 12" outlet regardless of manufacturer.
CONFIGURATIONS
Valves shall be lurnished with tapping sleeve side to ANSI B161 llanged end with centering ring.
Outlet side of valve shall be mechanical joint with (without) accessories to AWWA C-1 f 1. Asbestos
Cement (AC) for Class 150 or 200 machined end A/C pipe (gasket by others).
MATERIALS All cast iron shall conform to ASTM-A-126 Class B. Castings shall be clean and sound without
delects that will impair their service. No plugging or welding of such delects will be allowed.
Stems shall be manganese bronze having a minimum tensile strength of 60,000 psi, a minimum
yield of 20,000 psi.
Bolts shall be electro-zinc plated steel with hex heads and hex nuts in accordance with ASTM
A-307 and A-563, respectively.
DESIGN Tapping valves shall be of Ihe non-rising stem type meeting all of the applicable requirements of
AWWA C-500.
NRS stem collars shall be cast integral with the stem and machined to size. The housing for the
valve stem collar shall be machined. For size 16" and larger, the thrust bearing area shall be fully
bronze lined.
NRS valves in 4"-12" size shall be !urnished with two O-ring seals located above the thrust collar
and one below. O-rings shall be set in machined grooves in the stem. The O-ring grooves shall
not be less than the root diameter ol the stem threads. 14" and larger valves shall have two O-
rings set in the seal plate, OS&Y valves shall be lurnished with conventional packing and
adjustable gland.
Disc for valves shall be cast iron, bronze faced. Bronze facing shall be machined after insertion
into the disc lace.
Valve port shall be free and full to allow cutter passage withoul interlerence.
Disc spreaders for all valves shall be bronze. In addition. disc spreader pockets for valves
and larger shall be bronze lined.
Valve bodies shall have guides cast integrally to align the discs during travel.
For valves 16" and larger, gearing and by-pass valves are recommended.
Bronze rollers, Iracks and scrapers shall be furnished on valves 16" and larger intended for
horizontal installalton in a horizontal line.
Direction to open shall be counler-clockwise unless otherwise specified.
PAINTING The inside and outside ol valves. together with the working parts except the bronze and
machined faces. shall be coated in accordance with AWWA standards.
MARKING Marking shall be in accordance with AWWA C-500 standards. to include the name of
manufacturer, the year of manufacture, maximum working pressure and size of valve.
Section 2
Page 5