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Three-Cam Eccentric Hard-Sealed Butterfly Valve
Three-cam eccentric hard-sealed butterfly valve usage
With use of the most advanced know-how of both at home and abroad, Three-Dimensional Eccentric Hard-Sealed Butterfly Valve is designed to be a three-dimensional eccentric multi-layer dual-way hard-sealed butterfly valve and suitable for petroleum, metallurgy, electric power, chemical industry, coal gas, construction, municipal projects etc.
Features:
a. Compact structure, small volume, light weight, flexible operation and easy repair.
b. Use the three-dimensional eccentric principle for design, the butterfly board’s seal-ring is formed as soft-hard layers pile-up metal sheet, features the dual merits of both metal hard seal and elastic seal, and whether at a low or high temperature, keeps a reliable performance without leakage.
c. The seal surface is made of build-up welding of Co-based hard alloy, wearable.
d. With use of the three-dimensional eccentric structure, three is almost no friction between valve seat and butterfly board, resulting in a long duration.
Three-cam eccentric hard-sealed butterfly valve product manufacture and acceptance standards
a. Standards of design: JB/T8527、API1609、JIS B2064 b. Standards of flange: GB4216、GB9113、GB9115
c. Structural length: GB12221、GB/T15188.2 d. Test standards: GB/T13927、JB/T9092
Three-cam eccentric hard-sealed butterfly valve main technical parameters
| DN(mm) | 40~200 | ||||||||||||
| PN(MPa) | 0.6 | 1.0 | 1.6 | 2.5 | 4.0 | ||||||||
| Test pressure (MPa) |
Shell strength | 0.9 | 1.5 | 2.4 | 3.75 | 6.0 | |||||||
| Sealing performance | 0.66 | 1.1 | 1.76 | 2.75 | 4.4 | ||||||||
| Applicable medium | Water、 Steam、 Oil、 Sea-water、 Acid | ||||||||||||
| Working temperature(℃) | Hard seal |
Sealing face material | Iron-based alloy | Co-based alloy | Stainless steel | Cr Ni Ti Steel | Cr Ni Mo Ti Steel | Co. alloy | |||||
| Applicable medium | <300 | <650 | <350 | <200 | <200 | <900 | |||||||
Three-cam eccentric hard-sealed butterfly valve material for main parts
| NO. | Part name | Material | ||||
| A216 WCB | A217 LCB | A351 CF8 | A351 CF8M | A351 CF3M | ||
| 1 | Nether cover | A105 | A105 | A182 F304 | A182 F316 | A182 F316L |
| 2 | Bearing | A182 F6a | A182 F304 | A182 F304 | A182 F316 | A182 F316L |
| 3 | Washer | F304+Flexible graphite | ||||
| 4 | Body | A216 WCB | A217 LCB | A351 CF8 | A351 CF8M | A351 CF3M |
| 5 | Nut | A194 2H | A194 4 | A194 8 | A194 8M | A194 8M |
| 6 | Bolt | A193 B7 | A193 B16 | A193 B8 | A193 B8M | A193 B8M |
| 7 | Gland | A182 F410 | A182 F304 | A182 F304 | A182 F316 | A182 F316L |
| 12 | Key | A194 2H | ||||
| 13 | Gear action | Nodular cast iron | ||||
| 14 | Yoke | A216 WCB | A351 CF8 | |||
| 15 | Shaft packing | Flexible graphite | PTFE | |||
| 16 | Bearing | B148/SF-1/17-7PH | ||||
| 17 | Tailpiece | A216 WCB | A217 LCB | A351 CF8 | A351 CF8M | A351 CF3M |
| 18 | Seal seat | Flexible graphite | PTFE | |||
| 20 | Pin | A276 316 | A276 316 | A276 316 | A276 316 | A276 316 |
| 21 | Butterfly board | A351 CF8M | A351 CF8M | A351 CF8M | A351 CF8M | A351 CF3M |
| 22 | Shaft | A276 316 | A276 316 | A276 316 | A276 316 | A276 316L |