Concentric Wafer Butterfly Valve SB71-B

DN

25~1200 (1"~48")

PN

0.6~2.5 (Class150, 5K, 10K)

Temperature Range

-20℃~150℃

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, GOST55510

Inspection

GB/T13927, ISO5028, API598, JB/T9092

Body Materials

GGG40, WCB, CF8, CF8M, CF3, CF3M

Disc Materials

GGG40, GGG40+Hypalon, CF8, CF8M, CF3, CF3M, Duplex Stainless Steel

Stem Materials

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

Seat Materials

EPDM, NBR, NR, SBR, Hypalon, Viton, MVQ

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Features & Benefits

SB71 butterfly valve has a compact structure and is designed to prevent the return of two-way differential pressure, which also features quick and easy 90-degree on-off operation, reliable sealing, strong corrosion resistance and no pin holes. It is suitable for various industrial fluid systems.

A. Stem Connection

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

B. Thrust Ring (Circlip)

Prevent the valve stem from blowing out.

C. O Ring

O ring is used as stem seal, which can achieve interference fit and ensure tightness.

D. 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.

E. Wafer Connection

Easy to install, simple structure, small size, light weight, economical, widely applicable.

F. Seat

It has zero leakage sealing and is replaceable & wear resistant. The material can be adapted to the medium. The rubber or resin valve seat is not easy to deform while its sealing is ensured. The valve seat is anti-aging and corrosion-resistant and its streamlined design makes the water flow smoother. Concentric butterfly valve with hard backrest needs to be equipped with a special flange.

Industry Options

Materials	Characteristics	Low Temp. ℃	High Temp. ℃	Recommended ℃
NR	High elasticity	-20	85	-5~70
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
CR	Oil, heat, flame, sunlight, ozone, acid and alkali resistance	-30	125	-15~100
Hypalon	Oxidation resistance, resistance to winding and cracking	-40	120	-25~110
FPM (Viton)	Chemical and most oils resistance, (except ketones & esters)	-20	200	-5~150
MVQ (Silicon)	High and low temperature resistance, oil, corrosion resistance	-55	200	-30~180
PFA	Excellent chemical corrosion resistance, low friction coefficient	-60	200	-45~180
FEP (F46)	Chemical resistance, radiation resistance	-20	150	-5~120
PTFE	Heat, cold, acid, alkali, organic solvents resistant	-60	180	-45~150
RPTFE	Corrosion resistance, low friction coefficient	-60	180	-45~150
UPVC	Corrosion and pressure resistance, hygiene	-30	100	-15~80
CPVC	Corrosion and pressure resistance, hygiene	-30	110	-15~95
PVDF	Anti aging and chemical resistance	-30	100	-15~70

Dimensions

Concentric Wafer Butterfly Valve SB71-B's Drawing

DN	L	A	B	SxS	ΦG	H	ISO 5211	ΦE	ΦE1	n0-Φd0	PN6		PN10		PN16		ANSI 150LB		JIS 10K
DN	L	A	B	SxS	ΦG	H	ISO 5211	ΦE	ΦE1	n0-Φd0	ΦD1	n-Φd	ΦD1	n-Φd	ΦD1	n-Φd	ΦD1	n-Φd	ΦD1	n-Φd
50	42	131	70	9x9		25	F05	65	50	4-8	110	4-14	125	4-18	125	4-18	120.7	4-18	120	4-19
65	45	139	86	9x9		25	F05	65	50	4-8	130	4-14	145	4-18	145	4-18	139.7	4-18	140	4-19
80	45	151	93	9x9		25	F05	65	50	4-8	150	4-18	160	8-18	160	8-18	152.4	4-18	150	8-19
100	52	163	111	11x11		28	F07	90	70	4-10	170	4-18	180	8-18	180	8-18	190.5	8-18	175	8-19
125	55	182	126	14x14		28	F07	90	70	4-10	200	8-18	210	8-18	210	8-18	215.9	8-22	210	8-23
150	55	202	145	14x14		28	F07	90	70	4-10	225	8-18	240	8-22	240	8-22	241.3	8-22	240	8-23
200	60	224	172	17x17		35	F10	125	102	4-12	280	8-18	295	8-22	295	12-22	298.5	8-22	290	12-23
250	67	268	204	22x22		40	F10	125	102	4-12	335	12-18	350	12-22	355	12-26	362	12-26	355	12-25
300	77	304	239	22x22		40	F10	125	102	4-12	395	12-18	400	12-22	410	12-26	431.8	12-26	400	16-25
350	77	340	260	22x22		40	F10	125	102	4-12	445	12-22	460	16-22	470	16-26	476.3	12-29	445	16-25
400	86	400	296		33.2	52	F14	175	140	4-18			515	16-26	525	16-30	539.5	16-29	510	16-27
450	104	422	330		38	52	F14	175	140	4-18			565	20-26	585	20-30	578	16-32	565	20-27
500	127	480	348		41.2	64	F14	175	140	4-18			620	20-26	650	20-33	635	20-32	620	20-27
600	152	562	444		50.7	70	F16	210	165	4-22			725	20-30	770	20-36	749.5	20-35	730	24-33