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 ...
Coatings and Rubber Linings Withstanding Harsh Conditions and the Test of Time In many industrial facilities, valves are reg u lar ly subject ed to harsh conditions, in clud ing re cir cu lat ing wa ter loops where cor ro sive ness in creas es each time the water pass es through the sys tem, and cooling water sys tems which utilize brack ish wa ter or salt wa ter as a me di um. This is especially true at fossil and nu cle ar pow er gen erating plants, which fre quent ly use sea water as their main cooling wa ter resource. To com bat the damaging effects of these harsh condi tions, Pratt utilizes epoxy coatings and rub ber linings in conjunction with superior design fea tures to help ensure that the Triton XR-70 butterfly valves will withstand the test of time. The unique construction of the Pratt Triton rub ber seated butterfly valve makes both epoxy coatings and rubber lin ings much more ef fec tive than other butterfly valve de signs. Since all surfaces of the Triton disc are exposed, there is no possibility for corrosion to start in hidden, un pro tect ed areas like the inside of a hollow, lens-shaped offset disc. Since there is no seat retention hardware, coating and/or lining breakdown in this area is also elim i nat ed. Rubber Linings Pratt lines corrosion-susceptible surfaces with a 3 ⁄16-inch thick rubber of 60 Shore A durom e ter. The surfaces are prepared and blasted to a near- white metal finish. The linings are ap plied by the “hand-lay-up-meth od” (similar to tank lining techniques) and then cured in an open steam autoclave using 40 to 50 psig steam pres sure. Following application and curing, the linings are vi su al ly inspected for air bubbles and checked at 7,000 volts with a positive control high-volt age spark tester. Epoxy Coatings Pratt has an extensive coating facility which ap plies and cures coatings in a controlled en vi ron ment. Prior to ap pli ca tion of the epoxy, valves are sand blast ed and thoroughly cleaned to ensure a prop er bond. The in te ri or and external sur fac es of each valve are coated with a Polya mide-cured, rust inhibiting epoxy, NSF ap proved. A mag net ic dry film thickness gauge is used to con firm that the coat ing thick ness match es the project/or der spec i fi ca tion re quire ments. Electron ic test ing for pin holes (hol i days) is per formed. In applications involving salt water and/or en trained sol ids which can cause erosion, the su pe ri or i ty of rubber lining on the valve disc has been clearly demonstrated by Pratt but ter fly valves placed in service decades ago that are still providing bubble tight closure today. Both ep oxy coat ing and rub ber lin ing have also suc cess ful ly pro tect ed the valve bodies in these corrosive ser vice con di tions as illustrated by Pratt’s long track record of quality and re li abil i ty at in dus tri al facilities and power plants around the world. 3/16" RUBBER Other rubber lining features include Pratt’s shaft-bearing being thor ough ly pro tect ed by rubber shaft seals to maintain bearing performance throughout the life of the valve. Also, the shaft bore in disc is sealed with a rubber seal. The juncture of the rubber liner to the rubber seat is also protected by a sealant applied under pressure. LINING CORROSION-RESISTANT DISC EDGE LINING Complete coverage of corrosion susceptible wetted surfaces is demonstrated in these drawings. Body lining in conjunction with the seat creates a water barrier and protects against corrosion. Henry Pratt Company | 7
Water Flow Characteristics Proven Performance During its product development phase, the Triton butterfly valve was test ed to en sure that it met our own rigorous standards for flow ca pac i ty. The Tri ton but ter fly valve con sis tent ly pro duced high C v values which trans lates to low er flow re sis tance, in turn, low er ing system operating costs to the user over the life of the valve. Full Open C v Valves Triton XR-70 Valves Class 150B 10 Bar Size Flat Arch 24 25380 26378 30 39657 41216 36 59351 62447 42 85899 89170 48 112195 116466 54 141808 146563 60 172343 176486 66 208535 213548 72 248174 254139 78 291260 298261 84 337793 345912 90 387772 397093 96 441199 451803 102 498072 510043 108 558392 571813 114 622159 637113 120 689373 705942 132 834171 854190 144 992697 1016557 8 | Henry Pratt Company
- Page 65 and 66: AWWA Butterfly Valves 3" - 20" Engi
- Page 67 and 68: Scope of Line: AWWA In-Plant Rubber
- Page 69 and 70: Features and Benefits: of Pratt Mod
- Page 71 and 72: Dimensional Data: Model 2FII, Flang
- Page 73 and 74: 401 S. Highland Avenue Aurora, Illi
- Page 75 and 76: 3" through 20" Butterfly Valves Sco
- 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
- Page 85 and 86: PRATT PRODUCT GUIDE Model 2FII Mono
- Page 87 and 88: 401 S. Highland Avenue Aurora, Illi
- Page 89 and 90: A Tradition of Excellence With the
- Page 91 and 92: Scope of Line: Triton XR-70 Butterf
- Page 93 and 94: Design Details: Triton XR-70 Butter
- Page 95: E-Lok Seat Design Years of Reliable
- 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
- Page 112 and 113: 401 S. Highland Avenue Aurora, Illi
- Page 114 and 115: Suggested Specification: Butterfly
- Page 116 and 117: 6" - 24" HP350 Mechanical Joint End
- Page 118 and 119: 3”-20” 2FII & Groundhog® Bonde
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- Page 140 and 141: Triton XR-70,Triton XL & Groundhog
- Page 142 and 143: Triton XR-70,Triton XL & Groundhog
- Page 144 and 145: 24”-48” HP250II Butterfly Valve
Coatings and Rubber Linings<br />
Withstanding Harsh Conditions<br />
and the Test of Time<br />
In many industrial facilities, valves are reg u lar ly subject ed<br />
to harsh conditions, in clud ing re cir cu lat ing wa ter loops<br />
where cor ro sive ness in creas es each time the water<br />
pass es through the sys tem, and cooling water sys tems<br />
which utilize brack ish wa ter or salt wa ter as a me di um.<br />
This is especially true at fossil and nu cle ar pow er<br />
gen erating plants, which fre quent ly use sea water as their<br />
main cooling wa ter resource.<br />
To com bat the damaging effects of these harsh<br />
condi tions, Pratt utilizes epoxy coatings and rub ber<br />
linings in conjunction with superior design fea tures to<br />
help ensure that the Triton XR-70 butterfly valves will<br />
withstand the test of time.<br />
The unique construction of the Pratt Triton rub ber seated<br />
butterfly valve makes both epoxy coatings and rubber<br />
lin ings much more ef fec tive than other butterfly valve<br />
de signs. Since all surfaces of the Triton disc are exposed,<br />
there is no possibility for corrosion to start in hidden,<br />
un pro tect ed areas like the inside of a hollow, lens-shaped<br />
offset disc. Since there is no seat retention hardware,<br />
coating and/or lining breakdown in this area is also<br />
elim i nat ed.<br />
Rubber Linings<br />
Pratt lines corrosion-susceptible surfaces with a 3 ⁄16-inch<br />
thick rubber of 60 Shore A durom e ter. The surfaces are<br />
prepared and blasted to a near- white metal finish. The<br />
linings are ap plied by the “hand-lay-up-meth od” (similar<br />
to tank lining techniques) and then cured in an open<br />
steam autoclave using 40 to 50 psig steam pres sure.<br />
Following application and curing, the linings are vi su al ly<br />
inspected for air bubbles and checked at 7,000 volts with<br />
a positive control high-volt age spark tester.<br />
Epoxy Coatings<br />
Pratt has an extensive coating facility which ap plies<br />
and cures coatings in a controlled en vi ron ment. Prior<br />
to ap pli ca tion of the epoxy, valves are sand blast ed and<br />
thoroughly cleaned to ensure a prop er bond. The in te ri or<br />
and external sur fac es of each valve are coated with a<br />
Polya mide-cured, rust inhibiting epoxy, NSF ap proved.<br />
A mag net ic dry film thickness gauge is used to con firm<br />
that the coat ing thick ness match es the project/or der<br />
spec i fi ca tion re quire ments. Electron ic test ing for pin<br />
holes (hol i days) is per formed.<br />
In applications involving salt water and/or en trained<br />
sol ids which can cause erosion, the su pe ri or i ty of rubber<br />
lining on the valve disc has been clearly demonstrated by<br />
Pratt but ter fly valves placed in service decades ago that<br />
are still providing bubble tight closure today. Both ep oxy<br />
coat ing and rub ber lin ing have also suc cess ful ly pro tect ed<br />
the valve bodies in these corrosive ser vice con di tions<br />
as illustrated by Pratt’s long track record of quality and<br />
re li abil i ty at in dus tri al facilities and power plants around<br />
the world.<br />
3/16" RUBBER<br />
Other rubber lining features include Pratt’s shaft-bearing<br />
being thor ough ly pro tect ed by rubber shaft seals to<br />
maintain bearing performance throughout the life of the<br />
valve. Also, the shaft bore in disc is sealed with a rubber<br />
seal. The juncture of the rubber liner to the rubber seat is<br />
also protected by a sealant applied under pressure.<br />
LINING<br />
CORROSION-RESISTANT<br />
DISC EDGE<br />
LINING<br />
Complete coverage of corrosion<br />
susceptible wetted surfaces is demonstrated<br />
in these drawings. Body<br />
lining in conjunction with the seat<br />
creates a water barrier and protects<br />
against corrosion.<br />
Henry Pratt Company | 7