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.

• Compact structure, small volume, light weight, flexible operation and easy repair.
• 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.
• The seal surface is made of build-up welding of Co-based hard alloy, wearable.
• With use of the three-dimensional eccentric structure, three is almost no friction between valve seat and butterfly board, resulting in a long duration.

• Standards of design: JB/T8527, API1609, JIS B2064
• Standards of flange: GB4216, GB9113, GB9115
• Structural length: GB12221, GB/T15188.2
• Test standards: GB/T13927, JB/T9092

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

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