The butterfly or wafer damper can be a stack damper where sealing or tight shut-off is not all-important. This type is used as an isolating damper for flue-gas scrubbers. The butterfly damper is lightweight, simple, quickly actuated and often comparatively low in cost. In process work, oval shapes adapt to that shape of duct. Occasionally, a double-disc butterfly appears resembling a circular two-bladed louver damper. The drive for a butterfly damper is also simple, needing only 90° of motion. The torque requirement can vary widely over damper life, if corrosion and thermal effects are severe. Hand levers, Gear boxes, Pneumatic Actuators or Electric, motorized damper valve actuators are used to actuate butterfly dampers.
Size Range : 8”- 120” Above on Request.
- Body : IS 2062 Gr. B
- Disc : IS 2062 Gr. B
- Shaft : AISI 410
- Bearing : Standard
- Gland Pata : IS 2062 Gr. B
- Graphite Ring : Graphite
- Hex Bolt : SS 202 / SS 304
- Seat Ring : IS 2062 Gr. B
- Bottom Shaft : AISI 410
Wafer Type Damper Valve
“4Matic” Manual (Handle / Gear) Operated Damper Valve for flow Control of Air & Gas.
Size Range : 1.1/2″ to 20″
| TEST PRESSURE | ||
| TESTING | BODY | SEAT |
| HYDRAULIC | 10 kG/CM2 | 5% Leakage |
| PRESSURE / TEMPERATURE RATING | |
| PRESSURE RATING | PN 6 ( MAXIMUM ) |
| OPERATING TEMPERATURE RANGE | -25 °C TO 400 °C (DEPENDING ON MOC ) UPTO 600 °C |
| No. | Description | Material | Qty. |
| 1 | Body | Gry Iron / C.S. / D.I. / CF8 / CF8M | 01 |
| 2 | Disc | C.S. / WCB / CF8 / CF8M | 01 |
| 3 | Shaft | AISI 410 / AISI 304 / AISI 316 / AISI 316L | 01 |
| 4 | Grafoil Ring | Graphite | 01 |
| 5 | Bering Bush | Metal Bush PTFE Coated | 01 |
| 6 | Nut & Bolt | S.S. 202 / S.S. 304 | 02 |
| 7 | Bottom Shaft | AISI 410 / AISI 304 / AISI 316 / AISI 316L | 01 |
| 8 | Grafoil Ring | Graphite | 01 |
| 9 | Dowel Pin | IS 2062 Gr. B | 01 |
| 10 | Bottom Cover | IS 2062 Gr. B | 01 |
| No. | Description | Material | Qty. |
| 1 | Body | Gry Iron / C.S. / D.I. / CF8 / CF8M | 01 |
| 2 | Disc | C.S. / WCB / CF8 / CF8M | 01 |
| 3 | Shaft | AISI 410 / AISI 304 / AISI 316 / AISI 316L | 01 |
| 4 | Grafoil Ring | Graphite | 01 |
| 5 | Bering Bush | Metal Bush PTFE Coated | 01 |
| 6 | Nut & Bolt | S.S. 202 / S.S. 304 | 02 |
| 7 | Bottom Shaft | AISI 410 / AISI 304 / AISI 316 / AISI 316L | 01 |
| 8 | Grafoil Ring | Graphite | 01 |
| 9 | Dowel Pin | IS 2062 Gr. B | 01 |
| Dimensions : (All Dimensions are in mm) | |||||||
| Valve Model | Valve Size | PORT | A | B | C | ØD | |
| MM | INCH | ||||||
| 4M-WDV-40 | 40 | 1.1/2″ | 40 | 55.5 | 81.5 | 33.5 | 85 |
| 4M-WDV-50 | 50 | 2″ | 50 | 60.5 | 100 | 43.5 | 80 |
| 4M-WDV-65 | 65 | 2.1/2″ | 65 | 68 | 107.5 | 46 | 102 |
| 4M-WDV-80 | 80 | 3″ | 80 | 75.5 | 115 | 46 | 125 |
| 4M-WDV-100 | 100 | 4″ | 100 | 85.5 | 125 | 52 | 139 |
| 4M-WDV-125 | 125 | 5″ | 125 | 108.5 | 167.5 | 56 | 168 |
| 4M-WDV-150 | 150 | 6″ | 150 | 121 | 180 | 56 | 204 |
| 4M-WDV-200 | 200 | 8″ | 200 | 146 | 205 | 60 | 252 |
| 4M-WDV-250 | 250 | 10″ | 245 | 221 | 271 | 68 | 316 |
| 4M-WDV-300 | 300 | 12″ | 295 | 252 | 296 | 78 | 362 |
| 4M-WDV-350 | 350 | 14″ | 340 | 271 | 312 | 78 | 410 |
| 4M-WDV-400 | 400 | 16″ | 388 | 300 | 365 | 102 | 470 |
| 4M-WDV-450 | 450 | 18″ | 450 | 332 | 368 | 90 | 540 |
| 4M-WDV-500 | 500 | 20″ | 490 | 377 | 420 | 90 | 622 |
“AFT” Double Flange Damper Valve
“4Matic” Gear Operated MS Fabricated Body With MS Fabricated Disc.
Size Range : 8″ to 80″
| PRESSURE / TEMPERATURE | |
| WORKING RATING | 5 KG/CM 2 |
| TEMPERATURE | UPTO 1200 °C |
| No. | Description | Material | Qty. |
| 1 | Body | IS 2062 Gr. B | 01 |
| 2 | Disc | IS 2062 Gr. B | 01 |
| 3 | Shaft | AISI 410 | 01 |
| 4 | Bearing | Standard | 02 |
| 5 | Gland Pata | IS 2062 Gr. B | 02 |
| 6 | Grephite Ring | Graphite | 02 |
| 7 | Hex Bolt | S.S. 202 / S.S. 304 | 02 |
| 8 | Seat Ring | IS 2062 Gr. B | 02 |
| 9 | Bottom Shaft | AISI 410 | 01 |
| Valve Model | Valve Size | ØA | ØB | n | ØC | D | E | F | |
| MM | Inch | ||||||||
| AFT-MS-G-200 | 200 | 8″ | 320 | 280 | 8 | 18 | 340 | 440 | 150 |
| AFT-MS-G-250 | 250 | 10″ | 375 | 335 | 12 | 18 | 366 | 466 | 150 |
| AFT-MS-G-300 | 300 | 12″ | 440 | 395 | 12 | 22 | 398 | 498 | 150 |
| AFT-MS-G-350 | 350 | 14″ | 490 | 445 | 16 | 22 | 450 | 550 | 150 |
| AFT-MS-G-400 | 400 | 16″ | 540 | 495 | 16 | 22 | 450 | 550 | 150 |
| AFT-MS-G-450 | 450 | 18″ | 595 | 550 | 16 | 22 | 478 | 578 | 150 |
| AFT-MS-G-500 | 500 | 20″ | 645 | 600 | 20 | 22 | 502 | 602 | 200 |
| AFT-MS-G-550 | 550 | 22″ | 749 | 692 | 20 | 22 | 610 | 710 | 200 |
| AFT-MS-G-600 | 600 | 24″ | 755 | 705 | 20 | 26 | 610 | 710 | 200 |
| AFT-MS-G-650 | 650 | 26″ | 785 | 744 | 20 | 26 | 635 | 735 | 200 |
| AFT-MS-G-700 | 700 | 28″ | 860 | 810 | 24 | 26 | 610 | 710 | 200 |
| AFT-MS-G-750 | 750 | 30″ | 887 | 846 | 24 | 26 | 633 | 723 | 200 |
| AFT-MS-G-800 | 800 | 32″ | 975 | 920 | 24 | 30 | 678 | 768 | 200 |
| AFT-MS-G-850 | 850 | 34″ | 1005 | 957 | 24 | 30 | 692 | 782 | 200 |
| AFT-MS-G-900 | 900 | 36″ | 1075 | 1020 | 24 | 30 | 728 | 818 | 250 |
| AFT-MS-G-1000 | 1000 | 40″ | 1175 | 1120 | 28 | 30 | 778 | 868 | 250 |
| AFT-MS-G-1100 | 1100 | 44″ | 1276 | 1222 | 32 | 33 | 948 | 1038 | 250 |
| AFT-MS-G-1200 | 1200 | 48″ | 1405 | 1340 | 32 | 33 | 1022 | 1112 | 250 |
| AFT-MS-G-1400 | 1400 | 56″ | 1630 | 1560 | 36 | 36 | 1025 | 1095 | 300 |
| AFT-MS-G-1600 | 1600 | 64″ | 1830 | 1760 | 40 | 36 | 1125 | 1195 | 300 |
| AFT-MS-G-1800 | 1800 | 72″ | 2045 | 1970 | 44 | 39 | 1252 | 1302 | 300 |
| AFT-MS-G-2000 | 2000 | 80″ | 2265 | 2180 | 48 | 42 | 1462 | 1562 | 300 |
Size Upto 3000 MM On Request
