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Contact us: Jack Wu
Tel:+86-577-67379084
Fax: +86-577-66997700
Mobile: +86-15957799534
Skype: jack.wu102
Email: reowocv@gmail.com

Contact us: SUNNY HUANG

E-mail: sunny@reowocv.com
Wechat/Whatsapp: +86-13868397001

70E Series high-performance Butterfly Valve

The company has obtained certifications such as TS equipment A1 level, CE, API 607, TR-CU, SIL3, etc.

Classification：

70 series butterfly valve

E-mail: sunny@reowocv.com

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Product Description

Introduction
The 70E series high-performance butterfly valve adopts a dual-eccentric design. The valve shaft is offset from the center of the valve body structure, and combined with the design of the circular sealing surface of the valve plate, the valve plate quickly separates from the sealing seat when opened, reducing the friction on the sealing surface. When closed, the valve plate exhibits excellent sealing performance. The central self-positioning sealing valve seat structure design, combined with a unique valve seat compensation sealing design, effectively compensates for the valve seat sealing while reducing the friction during opening and closing, greatly reducing the operating force of the valve and effectively improving the control accuracy of the butterfly valve. This series of butterfly valves has stable and reliable sealing performance and a long service life. It is suitable for regulating and cutting off general corrosive gases and liquid media.

Actuator and auxiliary control device

Pneumatic
Electric
Pneumatic-hydraulic
Worm gear

Applications

Air separation, chemical industry, petroleum
Chemical fiber, electric power, metallurgy
Pharmacy, environmental protection

Manufacturing range

Size range:DN2"-48"
Pressure rating:150 - 300LB，PN1.0 -4.0Mpa
Connection type: wafer type, flange type

Parameters of control valves

Trim features:double-eccentric structure,Compensation type sealing seat,Valve disc arc surface
Body type:straight-through type
Bonnet type:standard integral type
Flow characteristic:approximately equal percentage
Shut-off class:ASME B16.104 VI (standard seat)；ASME B16.104 IV (metal seat)
Pipe connection type:wafer type, flange type
Applicable temperature range:-45°C -250°C
Actuator type:pneumatic piston actuator electric actuator

Structural drawing of 70E Series

Materials of 70E Series

No.	Name	Material
1	Stem	17-4PH Stainless Steel ASTM A564Gr630 Optional:316ss,inconel718/625,Monel
3	Packing	PTFE Optional:Graphite-high density/low density
4	Front bearing	316SS Backed Ptfe,hastelloy C Backed Ptfe
5	Cover plate	Optional:316ss,ALLOY20
8	Body	Carbon Steel A216 Gr WCB Or A105 Optional:ASTM A351 CF8M Or A182 F316
9	Disc	Carbon Steel A216 Gr WCB Or A105+Surfacing SS Optional:316ss,ASTM A351 CF8M Or A182 F316 Monel,Alloy20,Aluminum Bronze,Hastelloy C
11	Limit part	17-4PH Stainless Steel ASTM A564Gr630 Optional:A182 F316/F304
14	Side seal ring	NBR Or VITON Optional:316SS
15	Seat	R.TFE.F Optional:R.TFE.C

Structural features of 70E Series

Outline
The double-eccentric design of the 70E Series butterfly valve reduces the abrasion of the seat and ensures the double-way tightness function within the whole pressure range. Taking the seat as the starting point, the eccentric disc produces a function similar to that of the cam and the disc can be pulled to leave the seat without the need of using too high operating force. The function of the disc similar to that of the cam at the starting position reduces the abrasion of the seat and reduces the deformation of the seat. When the valve is opened, the disc will instantly leave the seat, and when the valve is closed, the function similar to that of the cam turns the rotary movement of the valve into linear motion, so as to effectively push the disc to contact the seat. The built-in compensation spring can effectively compensate for the abrasion of the sealing seat and enable the sealing seat to be elastic during the opening and closing process, greatly reduce friction, enhance sensitivity and make the whole valve have excellent shut-off and control functions.

Seat design:
The 70E Series provides various types of seat structures:
The seat adopts the internally opened U groove structure. Self sealing is realized through medium pressure. The built–in compensation spring makes the sealing structure realize real dynamic sealing through the medium pressure in the system. Seat leakage: under CV×10⁻⁶%.
The seat adopts externally opened O ring groove structure. When the disc is not completely closed, the seat has certain radial flexibility so that the seat abrasion is reduced and the torque is lowered. When the disc is closed, the pre–tightening force of the sealing face of the disc is offered to ensure sealing. Seat leakage: under CV×10⁻⁶%.

Size of 70E Series

Body size

Valve size(DN)		PN10/16/150LB		H1	H2	H3	H4	A	B	M	φD	C×C	E
Valve size(DN)		L1	L2	H1	H2	H3	H4	A	B	M	φD	C×C	E
3"	DN80	48	114	122	270	70	20	90	40	M10	20	17×17	--
4"	DN100	54	127	132	292	70	20	90	40	M10	20	17×17	--
5"	DN125	57	140	144	314	70	20	90	40	M10	20	17×17	--
6"	DN150	57	152	164	350	70	20	90	40	M10	20	17×17	--
8"	DN200	64	152	202	422	80	25	110	40	M12	28	22×22	--
10"	DN250	71	165	245	525	85	30	130	50	M14	32	26×26	--
12"	DN300	81	178	272	562	85	30	130	50	M14	36	28×28	--
14"	DN350	92	190	313	643	95	35	142	55	M20	42	34×34	--
16"	DN400	102	216	343	703	95	35	142	55	M20	48	40×40	--
18"	DN450	114	222	364	744	100	40	170	80	M24	50	38×38	--
20"	DN500	127	229	394	814	100	40	170	80	M24	50	38×38	--
24"	DN600	154	267	449	934	120	50	184	98	M27	65	54×54	--
28"	DN700	165	292	490	1000	120	50	184	98	M27	75	54×54	--
32"	DN800	190	318	545	1125	160	60	268	105	M27	85	--	22
36"	DN900	203	330	603	1255	160	60	268	140	M30	90	--	25
40"	DN1000	216	410	675	1395	160	60	268	140	M30	100	--	28
48"	DN1200	254	470	870	1450	160	70	268	140	M30	100	--	28

Rated CV value and trave

ValveSize		Rated CV value	ValveSize		Rated CV value
inch	mm	90°Opening	inch	mm	90°Opening
3	80	178	18	450	11314
4	100	430	20	500	14870
5	125	458	24	600	21450
6	150	1010	28	700	30515
8	200	2710	32	800	41603
10	250	3440	36	900	54193
12	300	4950	40	1000	56920
14	350	6485	48	1200	77390
16	400	8525	--	--	--

Keyword：

70 series butterfly valve

seat

optional

certification

WORKSHOP

Blank size

Blank size 1

Spectral analysis

Spectral analysis 1