Wafer Design Cast Iron Body (DI 8″-12″), 316SS Disc, 316SS Stem
Seated Butterfly Valve
General purpose, resilient seated Butterfly Valve, wafer design,
cast iron body (DI 8″-12″),
316ss disc, 316ss stem, EPT, NBR or Viton seat, 10-position notch
plate & lever-rated 16 bar.
Sizes- 1½” (DN40)→ 12″ (DN300)
* Options: Various seats including neoprene, EPDM, silicon,
hypalon. 304 or 410ss stem,
aluminium bronze or DI nylon coated disc, Ductile iron body,
Undercut disc, Gear Operator, Nylon 11 coating.
Epoxy paiting suitable for drinking water applications.
The wafer butterfly valves are widely applied, thanks to there
multiple functions of regulation and on-off valves. Thanks to the
EPDM gasket and to the epoxy coating, the wafer butterfly valves
can be installed in drinking water plants, but they can also be
applied for sewage or brackish water with inox disc (fig.1401) and
body not in touch with the fluid. The wafer butterfly valves are
manufactured as centric type disc, they can stand both directions
of fluid and are maintenance-free. With EPDM sleeve, they can stand
maximum 130°C temperature. The wafer butterfly valves can be
installed between welding neck flanges EN PN 10-16 and ANSI #150,
without any need of additional flange gaskets. Such valves can be
installed in any position. The wafer butterfly valves come with
lever (standard execution); reducing gear, pneumatic operator with
single or double effect, electric actuator on request.
A Butterfly valve is a quarter-turn rotary motion valve, that is used to stop,
regulate, and start the flow. Butterfly valves are a quick open
type. A 90° rotation of the handle can completely close or open the
valve. Normally, they are used in systems where a positive shut-off
is not required. In this article, you will learn about following
types of Valve.
- Wafer Type
- Lug Style Type
- Flanged Type
- Butt Welded Ends Types
- Zero offset
- Double Offset
- Triple Offset
Large Butterfly valves are usually equipped with gearbox type
actuator, where the handwheel is connected to the stem via a
gearbox. This will reduce the force but at the same time reduce the
speed of the operation. This type of valve should be installed in
the open position. If the valve is closed during installation, the
rubber seat will wedge against the valve disc and make it difficult
to open.
| Fingure: B5000F | | Size : 2"-36" | | Design Standard : API 609-83 | | Face to Face : ANSI B16.10 | | Flange Drilling : ANSI B16.5 | | Application | | characteristic is :due to use three eccentric configuration,
hermetic capability reliably, | | which ensure disc never touch sealing seat when it start, solve the
problem of | | hermetical seat burden unequally,prolong service life, and ensure
reliable hermetic | | advantage capability with of high temperature resistant,
wearable,antisepsis etc. |
| Specification | | Structre type:double flanged three eccenticity | | Design standard:API609-83 | | flange connection dimension:ANSI B 16.5 | | Flange drilling:ISO5211. | | Structure length:ANSI B 16.10-1992 | | Pressure test:API 598-82 |
Materials | Body | WCB,CF8M | | Dise | WCB,CF8M | | Stem | 416 Cr13Cr18Ni9Ti | | Seal ring | 316,Fluorine plastic | | Packing | Flesxible graphite,fluorine plastic |
Dimensions | API 150LB Series | | DN | L | H | H2 | D | D1 | D2 | M | n-φd1 | | 50 | 108 | 110 | 345 | 152 | 120.5 | 92 | M18 | 4-19 | | 80 | 114 | 125 | 380 | 190 | 152.5 | 127 | M18 | 4-19 | | 100 | 127 | 145 | 415 | 229 | 190.5 | 157 | M18 | 8-19 | | 125 | 140 | 165 | 455 | 254 | 216 | 186 | M20 | 8-22 | | 150 | 140 | 175 | 545 | 279 | 241.5 | 216 | M20 | 8-22 | | 200 | 150 | 210 | 645 | 343 | 298.5 | 270 | M20 | 8-22 | | 250 | 160 | 250 | 695 | 406 | 362 | 324 | M24 | 12-25 | | 300 | 178 | 285 | 830 | 483 | 432 | 381 | M24 | 12-25 | | 350 | 190 | 320 | 900 | 533 | 476 | 413 | M27 | 16-29 | | 400 | 216 | 355 | 980 | 597 | 540 | 470 | M27 | 16-29 | | 450 | 222 | 380 | 1030 | 635 | 578 | 533 | M30 | 16-32 | | 500 | 229 | 415 | 1110 | 699 | 635 | 584 | M30 | 20-32 | | 600 | 267 | 475 | 1305 | 813 | 749.5 | 692 | M33 | 20-35 | | 750 | 292 | 580 | 1525 | 985 | 914 | 857 | M33 | 28-35 | | 800 | 318 | 630 | 1585 | 1060 | 978 | 914 | M39 | 28-41 | | 900 | 330 | 680 | 1765 | 1168 | 1085 | 1022 | M39 | 32-41 |
| API 300LB Series | | DN | L | H | H2 | D | D1 | D2 | M | n-φd1 | | 50 | 108 | 110 | 345 | 165 | 127 | 92 | M18 | 8-19 | | 80 | 114 | 125 | 380 | 210 | 168 | 127 | M20 | 8-22 | | 100 | 127 | 145 | 415 | 254 | 200 | 157 | M20 | 8-22 | | 125 | 140 | 165 | 455 | 279 | 235 | 186 | M20 | 8-22 | | 150 | 140 | 175 | 545 | 318 | 270 | 216 | M20 | 12-22 | | 200 | 150 | 210 | 645 | 381 | 330 | 270 | M24 | 12-26 | | 250 | 160 | 250 | 695 | 445 | 387 | 324 | M27 | 16-29 | | 300 | 178 | 285 | 830 | 521 | 451 | 381 | M30 | 16-32 | | 350 | 190 | 320 | 900 | 584 | 514 | 413 | M30 | 20-32 | | 400 | 216 | 355 | 980 | 648 | 571 | 470 | M33 | 20-35 | | 450 | 222 | 380 | 1030 | 711 | 628 | 533 | M33 | 24-35 | | 500 | 229 | 415 | 1110 | 775 | 686 | 584 | M33 | 24-35 | | 600 | 267 | 475 | 1305 | 914 | 813 | 692 | M39 | 24-41 | | 750 | 292 | 580 | 1525 | 1092 | 997 | 857 | M45 | 28-49 | | 900 | 330 | 680 | 1765 | 1270 | 1168 | 1022 | M50 | 32-53 |
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Types of Butterfly Valves Based on Body Construction
Based on the type of ends of the body butterfly valves are
available in following types.
Both Flanged Ends
Wafer Type Ends
Lug Type Ends
Butt Welded Types Ends
Water Type
The wafer body is placed between pipe flanges, and the flange bolts
surround the valve body. A wafer type butterfly
valve is easy to installed but it cannot be used as an isolation
valve.
Seat Types
Butterfly valves can be metal-to-metal seated, soft seated, or with
a fully lined body and disc. The first image is of a
soft seated fully lined body and disc valve. Second, is a soft seat
with metal disk and the third is metal to metal seat type valve.
