33 12 16.26 - 001-A - Response AAN-ANR Butterfly Valves - Garney ...
33 12 16.26 - 001-A - Response AAN-ANR Butterfly Valves - Garney ... 33 12 16.26 - 001-A - Response AAN-ANR Butterfly Valves - Garney ...
Suggested Specification for the Pratt Rubber Seated Butterfly Valve, Sizes 3 through 20 inches General Butterfly valves shall be manufactured in accordance with the latest revision of AWWA C504, Class 150B and conform to NSF Standard 61. The manufacturer shall have produced AWWA butterfly valves for a minimum of five years. All valves shall be either Henry Pratt Model 2FII or Monoflange MKII and comply with the following details. Valve Bodies Valve bodies shall be constructed of ASTM A126, Class B cast iron for flanged valves or ASTM A536 (65-45-12) for wafer style. Flanged valves shall be fully faced and drilled in accordance with ANSI Standard B16.1, Class 125. Valve Seats Rubber body seats shall be of one piece construction, simultaneously molded and bonded into a recessed cavity in the valve body. Seats may not be located on the disc or be retained by segments and/or screws. For wafer style valves, the seat shall cover the entire inner surface of the valve body and extend over the outside face of the valve body to form a flange gasket. Valve Bearings Valve bearings shall be of a self-lubricating, nonmetallic material to effectively isolate the disc-shaft assembly from the valve body. Metal-to-metal thrust bearings in the flow stream are not allowed. Valve Disc The disc shall be a lens-shaped design to afford minimal pressure drop and line turbulence. Materials of construction shall be: • 3"-6" — ASTM A351 Gr. CF8M stainless steel disc • 8"-20" — ASTM A126, Class B cast iron disc with a stainless steel type 316 edge Painting All surfaces of the valve interior shall be clean, dry and free from grease before painting. The valve interior and exterior, except for disc edge, rubber seat and finished portions shall be evenly coated with an NSF61 approved 2-part liquid epoxy. Minimum dry film thickness shall be 4-6 Mils. Testing Hydrostatic and seat leakage tests shall be conducted in strict accordance with AWWA Standard C504. Proof of Design The manufacturer furnishing valves under the specification shall be prepared to provide Proof of Design Test reports to illustrate that the valves supplied meet the design requirements of AWWA C504. Manual Actuators: Manual actuators shall be of the traveling nut, self-locking type and shall be designed to hold the valve in any intermediate position between fully open and fully closed without creeping or fluttering. Actuators shall be equipped with mechanical stop-limiting devices to prevent overtravel of the disc in the open and closed positions. Actuators shall be fully enclosed and designed to produce the specified torque with a maximum pull of 80 lb. on the handwheel or chainwheel. Actuator components shall withstand an input torque of 450 Lb. Ft. at extreme operator position without damage. Manual actuators shall conform to AWWA C504 and shall be Pratt MDT or an approved equal. Powered Actuators: Refer to Pratt’s Butterfly Valve Actuator brochure for suggested specifications and detailed information regarding cylinder actuators and electric actuators. Discs shall be retained by stainless steel pins which should extend through the full diameter of the shaft to withstand the specified line pressure up to valve rating and the torque required to operate the valve. Disc stops located in the flow stream are not allowed. Valve Shafts Valve shafts shall be of stainless steel type 304. At the operator end of the valve shaft, a packing gland utilizing “V” type chevron packing shall be utilized. “O” ring and/or “U” cup packing is not allowed. Henry Pratt Company | 5
Dimensional Data: Model 2FII, Flanged Butterfly Valve E Nominal Valve Size A B C D E F G 3 43⁄4 31⁄4 71⁄2 5 3⁄4 4 – 5⁄8 6 4 51⁄2 31⁄2 9 5 15 ⁄16 8 – 5⁄8 71⁄2 6 61⁄2 51⁄8 11 5 1 8 – 3⁄4 91⁄2 8 73⁄4 61⁄2 131⁄2 6 11⁄8 8 – 3⁄4 113⁄4 10 9 97⁄8 16 8 1 3 ⁄16 12 – 7⁄8 141⁄4 12 101⁄2 113⁄8 19 8 11⁄4 12 – 7⁄8 17 14 117⁄8 123⁄4 21 8 13⁄8 12 – 1 183⁄4 16 131⁄2 143⁄8 231⁄2 8 1 7 ⁄16 16 – 1 211⁄4 18 143⁄8 151⁄4 25 8 1 9 ⁄16 16 – 11⁄8 223⁄4 20 16 167⁄8 271⁄2 8 11 1 ⁄16 20 – 11⁄8 25 All dimensions shown in inches. D — Available in sizes 3 through 20 inches E Dimensional Data: Monoflange MKII Wafer Butterfly Valve Nominal Valve Size A B C D 3 43⁄4 31⁄4 51⁄4 2 1 ⁄16 4 51⁄2 31⁄2 63⁄4 2 5 ⁄16 6 61⁄2 51⁄8 85⁄8 2 15 ⁄16 8 73⁄4 61⁄2 107⁄8 3 1 ⁄16 10 9 97⁄8 131⁄4 3 3 ⁄16 12 101⁄2 11 5 ⁄16 16 3 7 ⁄16 14 117⁄8 123⁄4 175⁄8 3 11 ⁄16 16 131⁄2 143⁄8 201⁄8 4 3 ⁄16 18 143⁄8 151⁄4 211⁄2 4 11 ⁄16 20 16 16 13 ⁄16 233⁄4 5 3 ⁄16 All dimensions shown in inches. 1/16" 1/16" D VALVE SIZE (in.) DISC O.D. (in.) MINIMUM MATING PIPE I.D. (in.)* 3 3.089 2.41 4 4.074 3.44 6 6.070 5.38 8 8.078 7.53 10 10.098 9.62 12 12.108 11.64 14 13.339 12.86 16 15.336 14.79 18 17.370 16.75 20 19.380 18.71 6 | Henry Pratt Company
- Page 20 and 21: 1513188 HP Page 4 of 5 401 South Hi
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- Page 69: Features and Benefits: of Pratt Mod
- Page 73 and 74: 401 S. Highland Avenue Aurora, Illi
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- Page 77 and 78: Design Details: Models 511A and 510
- Page 79 and 80: Suggested Specification for the Hen
- Page 81 and 82: Actuator Dimensional Data for Model
- Page 83 and 84: Figure 511 24" - 72" Class 150 B Fl
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- Page 93 and 94: Design Details: Triton XR-70 Butter
- Page 95 and 96: E-Lok Seat Design Years of Reliable
- Page 97 and 98: Water Flow Characteristics Proven P
- Page 99 and 100: Valve End Types and Dimensions: Mec
- Page 101 and 102: Actuation Traveling Nut Type Manual
- Page 103: 401 S. Highland Avenue Aurora, Illi
- Page 106 and 107: SCOPE OF THE LINE: PRATT HP250II B
- Page 108 and 109: THE HENRY PRATT SEAT ON BODY DESIGN
- Page 110 and 111: HP250II 3"- 20", DUCTILE IRON BODY
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- Page 114 and 115: Suggested Specification: Butterfly
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Suggested Specification for the Pratt<br />
Rubber Seated <strong>Butterfly</strong> Valve, Sizes 3 through 20 inches<br />
General<br />
<strong>Butterfly</strong> valves shall be manufactured in accordance<br />
with the latest revision of AWWA C504, Class 150B and<br />
conform to NSF Standard 61. The manufacturer shall<br />
have produced AWWA butterfly valves for a minimum of<br />
five years. All valves shall be either Henry Pratt Model 2FII<br />
or Monoflange MKII and comply with the following details.<br />
Valve Bodies<br />
Valve bodies shall be constructed of ASTM A<strong>12</strong>6, Class B<br />
cast iron for flanged valves or ASTM A536 (65-45-<strong>12</strong>) for<br />
wafer style. Flanged valves shall be fully faced and drilled<br />
in accordance with ANSI Standard B16.1, Class <strong>12</strong>5.<br />
Valve Seats<br />
Rubber body seats shall be of one piece construction,<br />
simultaneously molded and bonded into a recessed cavity<br />
in the valve body. Seats may not be located on the disc or<br />
be retained by segments and/or screws. For wafer style<br />
valves, the seat shall cover the entire inner surface of the<br />
valve body and extend over the outside face of the valve<br />
body to form a flange gasket.<br />
Valve Bearings<br />
Valve bearings shall be of a self-lubricating, nonmetallic<br />
material to effectively isolate the disc-shaft assembly from<br />
the valve body. Metal-to-metal thrust bearings in the flow<br />
stream are not allowed.<br />
Valve Disc<br />
The disc shall be a lens-shaped design to afford<br />
minimal pressure drop and line turbulence. Materials of<br />
construction shall be:<br />
• 3"-6" — ASTM A351 Gr. CF8M stainless steel disc<br />
• 8"-20" — ASTM A<strong>12</strong>6, Class B cast iron disc with a<br />
stainless steel type 316 edge<br />
Painting<br />
All surfaces of the valve interior shall be clean, dry and<br />
free from grease before painting. The valve interior and<br />
exterior, except for disc edge, rubber seat and finished<br />
portions shall be evenly coated with an NSF61 approved<br />
2-part liquid epoxy. Minimum dry film thickness shall be<br />
4-6 Mils.<br />
Testing<br />
Hydrostatic and seat leakage tests shall be conducted in<br />
strict accordance with AWWA Standard C504.<br />
Proof of Design<br />
The manufacturer furnishing valves under the<br />
specification shall be prepared to provide Proof of Design<br />
Test reports to illustrate that the valves supplied meet the<br />
design requirements of AWWA C504.<br />
Manual Actuators: Manual actuators shall be of the<br />
traveling nut, self-locking type and shall be designed<br />
to hold the valve in any intermediate position between<br />
fully open and fully closed without creeping or fluttering.<br />
Actuators shall be equipped with mechanical stop-limiting<br />
devices to prevent overtravel of the disc in the open<br />
and closed positions. Actuators shall be fully enclosed<br />
and designed to produce the specified torque with a<br />
maximum pull of 80 lb. on the handwheel or chainwheel.<br />
Actuator components shall withstand an input torque of<br />
450 Lb. Ft. at extreme operator position without damage.<br />
Manual actuators shall conform to AWWA C504 and shall<br />
be Pratt MDT or an approved equal.<br />
Powered Actuators: Refer to Pratt’s <strong>Butterfly</strong> Valve<br />
Actuator brochure for suggested specifications and<br />
detailed information regarding cylinder actuators and<br />
electric actuators.<br />
Discs shall be retained by stainless steel pins which<br />
should extend through the full diameter of the shaft to<br />
withstand the specified line pressure up to valve rating<br />
and the torque required to operate the valve. Disc stops<br />
located in the flow stream are not allowed.<br />
Valve Shafts<br />
Valve shafts shall be of stainless steel type 304. At the<br />
operator end of the valve shaft, a packing gland utilizing<br />
“V” type chevron packing shall be utilized. “O” ring and/or<br />
“U” cup packing is not allowed.<br />
Henry Pratt Company | 5