Cast Iron Lag Type Gear Operated Butterfly Valves 200 Psi 15 Mm To
300 Mm
Lug-Style Butterfly Valve
Lug-style butterfly valves are usually composed of metal such as
ductile iron or steel.
They feature threaded tapped lugs positioned on the valve flanges
for bolt connections.
Lug-style butterfly valves are suitable for end-of-line service but
a blind flange is always recommended.
Lug-style butterfly valves are manufactured to be compatible with
either pneumatic or electric actuation.
Disc and seat material should be determined based on application
and flow media.
Epoxy paiting suitable for drinking water applications.
Short body flanged butterfly valves are the new “state of the art”
butterfly valves available on the market, with
a very compact design and various materials of constructions, they
can be applied in several plants. Compatible
with BS, DIN and ANSI flanges, the short body flanged butterfly
valves have the rubber liner vulcanized on the
body of the valve, allowing strong and reliable tightness, as well
as the O ring cast on the body, that prevents any
need of gaskets. Short body flanged butterfly valves are
manufactured as centric type disc, they can stand both
directions of fluid and are maintenance-free. The body, not in
contact with the fluid, can be lined with EPDM, BUNA,
PTFE, Neoprene or Viton: in this way we can apply these butterfly
valves to any plant and for every medium, simply
mounting the suitable disc in ductile iron, stainless steel 304 or
316, Al-Bronze C95400. Such valves can be installed
in any position. Short body flanged butterfly valves come reducing
gear and handwheel (standard execution), 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 |
|
Pros
The hand operation allows for easy operation and understanding.
Relative low torque to switch position compared to ball valves.
High Kv-value because fluid can flow in straight line.
It has a small construction length in relation to the 50 mm (2
inch) diameter compared to a similar size ball valve.
It can be used for a wide array of fluids and gases.
Suitable for viscous media.
Remove the squeeze lever to mount an actuator thanks to the ISO
5211 flange.
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.
Industrial Applications
Butterfly valves are used in a variety of industries, including:
