THREE-DIMENSIONAL ECCENTRIC HARD-SEALED BUTTERFLY VALVE
A. THREE-DIMENSIONAL 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.

THREE-DIMENSIONAL ECCENTRIC HARD-SEALED BUTTERFLY VALVE Features:
  1. Compact structure, small volume, light weight, flexible operation and easy repair.
  2. 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.
  3. The seal surface is made of build-up welding of Co-based hard alloy, wearable.
  4. With use of the three-dimensional eccentric structure, three is almost no friction between valve seat and butterfly board, resulting in a long duration.

B. THREE-DIMENSIONAL ECCENTRIC HARD-SEALED BUTTERFLY VALVE PRODUCT MANUFACTURE AND ACCEPTANCE STANDARDS
  1. Standards of design: JB/T8527, API1609, JIS B2064
  2. Standards of flange: GB4216, GB9113, GB9115
  3. Structural length: GB12221, GB/T15188.2
  4. Test standards: GB/T13927, JB/T9092

C. THREE-DIMENSIONAL ECCENTRIC HARD-SEALED BUTTERFLY VALVE MAIN TECHNICAL PARAMETER
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

D. THREE-DIMENSIONAL 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

The technical data subject to amend without notice