Concentric Wafer Butterfly Valve SB71-P

DN

50~1200 (2"~48")

PN

0.6~1.6 (Class150, 5K, 10K)

Temperature Range

-20℃~180℃

Connection

Wafer

Installation Direction

Bidirectional

Design

GB/T12238, BS EN593, API609

Face to Face

GB/T12221, BS EN558-1

Flange Drilling

GB/T9113, ASME B16.5, EN1092, GOST12820, GOST33259, DIN2501

Top Connection

ISO5211

Inspection

GB/T13927, ISO5028, API598, JB/T9092

Body Materials

GGG40, WCB, CF8, CF8M, CF3, CF3M

Disc Materials

GGG40+PTFE, WCB+PTFE, CF8+PTFE, CF8M+PTFE

Stem Materials

45#, 410, 416, 431, 304, 316

Seat Materials

F46, PTFE, PFA

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Features & Benefits

SB71-P is a kind of full-lined butterfly valves with split (two-piece) valve bodies, which is commonly used in industries dealing with corrosive, abrasive, or high-temperature fluids. The split structure allows for easier maintenance and replacement of internal components.

A. Stem Connection

The stem connection can be customized into different shapes (square or round+key)to connect the drive.

B. Bushing

It has the function of maintaining the position of the valve stem and can ensure the sealing between the valve stem and the valve body. And the material can be adapted to the medium.

C. Seat

The seat is completely lined with a corrosion-resistant material such as PTFE, EPDM, or other materials, providing protection against aggressive chemicals and extending the valve’s lifespan.

D. Disc

Provides excellent flow control with minimal pressure loss due to its streamlined internal design.

E. Body

The valve is designed with a two-piece (split) body, which allows for easier maintenance and replacement of internal components. The split body provides flexibility for inspection and servicing without needing to remove the entire valve from the pipeline.

Industry Options

Materials	Characteristics	Low Temp. ℃	High Temp. ℃	Recommended ℃
NBR	Oil resistivity	-30	100	-15~90
EPDM	Aging resistance, ozone resistance, corrosion resistance	-40	125	-25~110
HT EPDM	Aging resistance, ozone resistance, corrosion resistance, heat resistance	-40	150	-25~135
Wear-resistant	Excellent traction performance and wear resistance	-30	100	-15~100
FEP (F46)	Chemical resistance, radiation resistance	-20	150	-5~120
PTFE	Heat, cold, acid, alkali, organic solvents resistant	-60	180	-45~150
PFA	Excellent chemical corrosion resistance, low friction coefficient	-60	200	-45~180

Dimensions

Concentric Wafer Butterfly Valve SB71-P's Drawing

DN	L	D	D1	n-Φd	h
50	43	90	125	4-18	3
65	46	110	145	4-18	3
80	46	125	160	8-18	3
100	52	145	180	8-18	3.5
125	56	175	210	8-18	3.5
150	56	205	240	8-23	3.5
200	60	250	295	8-23	4
250	68	300	350	12-23	4
300	78	350	400	12-23	4.5
350	78	410	460	16-23	4.5
400	102	460	515	16-26	4.5
450	114	510	565	20-16	4.5
500	127	560	620	20-26	5
600	154	660	725	20-30	5
700	165	775	840	24-33	5
800	190	880	950	24-33	5
900	203	980	1050	28-33	6
1000	216	1090	1160	28-36	6
1200	254	1300	1380	32-39	7