| BUTTERFLY VALVES |
|
When Using larger Throttling Valve, using flanged piping connection, BUTTERFLY VALVE should be considered.
Generally BUTTERFLY VALVES are low pressure valve with a simple 90° disc stem operation. In some cases , they are used as shut off valves although offering pressure drop through the valve opening.
The usefulness of the BUTTERFLY VALVES has increased with the development of elastomeric liners with a water body which provide a tight shut-off. Such liners normally utilize back-up rings in the body to effectively support the liner. This provides sealing of the liner against the disc as well as the adjacent flanges. |
"NITRILE" Rubber is the most common liner material. Other plastomaric materials are available for higher temperatures & corrosion resistance. Other advantages are initial low costs & ease of installation.
Lug wafer type valves are also available. |
| Available On Request |
• |
Teflon Lined Valves |
• |
Metal to Metal Seated |
• |
Damper Valve |
• |
Flanged Ends Valves |
• |
Gear Operated |
• |
Pneumatically Operated |
• |
Motor Operated Valve |
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| |
SIZE |
A |
B |
C |
ØD |
#E |
X |
40 |
33 |
91 |
172 |
95 |
24 |
268 |
50 |
43 |
100 |
140 |
103 |
27 |
268 |
80 |
46 |
119 |
153 |
130 |
63 |
268 |
100 |
52 |
139 |
175 |
162 |
82.5 |
268 |
150 |
56 |
176 |
225 |
219 |
136 |
268 |
200 |
60 |
232 |
302 |
273 |
184.5 |
508 |
250 |
68 |
260 |
333 |
328 |
234 |
508 |
300 |
78 |
290 |
356 |
384 |
280 |
508 |
350 |
78 |
315 |
--- |
438 |
329 |
- |
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| SPECIFICATIONS : |
| Design Standard |
: |
|
BS 5155 / API 609 / AWWA C 504 |
| Ends:-Wafer type |
: |
|
Can be Mounted between Two flanged of ASA / DIN / BS |
| Testing |
: |
|
BS 6755-1 |
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| |
NO. |
PART NAME |
QTY. |
MATERIAL SPECIFICATION |
1 |
Body |
1 |
IS 210 GR. FG 220 |
ASTM A 216 GR. WCB |
ASTM A 351 GR. CF8 / CF8M |
2 |
Sealing Brush |
1 |
NYLON |
NYLON |
PTFE |
3 |
Bearing Brush |
2 |
CARBON STEEL |
CARBON STEEL |
SS 304 / SS 316 |
4 |
Moulded Liner |
1 |
NITRILE RUBBER |
NITRILE RUBBER |
PTFE LINED |
5 |
Disc |
1 |
IS 210 GR. FG 220 |
ASTM A 216 GR. WCB |
ASTM A 351 GR. CF8 / CF8M |
6 |
Spindle |
1 |
AISI 410 |
AISI 410 |
AISI 304 / AISI 316 |
7 |
Bottom Plug |
1 |
CARBON STEEL |
CARBON STEEL |
AISI 304 / AISI 316 |
8 |
'0' Ring |
2 |
NITRILE RUBBER |
NITRILE RUBBER |
VITON |
9 |
Handle |
1 |
CARBON STEEL |
CARBON STEEL |
Carbon Steel |
|
| |
| ALTERNATE MATERIAL OF CONSTRUCTION : |
| WC6, WC9, LCB, LC6 CF3, CF3M, CG3M, HESTALLOY C& B, MONEL, TITANIUM |
MANUFACTURING RANGE |
40MM TO 400MM |
|
| INSPECTION & TESTING |
CLASS |
SHELL |
SEAT |
| |
HYDROSTATIC |
HYDROSTATIC |
150# |
24 Kg/Cm2 |
16 Kg/Cm2 |
|
