In the process of valve body closing, the more eccentric and the valve seat are closed together, the better the valve body can be closed automatically by eccentric and centering ball. The ball and valve seat of the valve are completely separated, which eliminates the wear of the sealing ring and overcomes the problem that the traditional ball valve seat and the sealing surface of the ball are always worn. The non-metallic elastic material is embedded in the metal seat, and the metal surface of the valve seat is well protected. This product is especially suitable for steel industry, aluminum industry, fiber, small solid particles, pulp, coal ash, petroleum gas and other media.

The valve adopts double eccentric structure, and uses the wedging effect of eccentric wheel to realize the closing and opening of sealing pair, so as to realize reliable sealing specific pressure and quick opening. Its advantages are as follows:
1. Due to the eccentric structure, the rotation radius of all points on the sealing spherical surface is different. When the sealing valve seat is closed, the closer the valve seat is, the more tight the sealing pressure is. The two-way sealing effect is excellent.
2. The valve disc adopts the full round straight through type, and has a full flow structure after opening, which has good liquidity and linear regulation performance.
3. In the process of long-term use, a new seal can be obtained by adjusting the seal ring pressing sleeve and the sealing spherical surface moving forward.
4. The operating force of the valve only acts on the minimum angle of opening or closing of the valve. When opening, the operating force decreases rapidly with the decrease of sealing specific pressure, and the sealing surface tends to be wear-free.
5. The circular flow channel has a full flow section after the valve is fully opened, and the bottom is a circular streamline structure. The deposited debris will be taken away with the flow of medium. During the closing process, the dirt deposited on the sealing surface can be removed by itself
Scale without affecting the seal.
6. The valve shaft adopts the upper and lower half shaft design, and is equipped with self-lubricating shaft sleeve. During the opening process of the valve, the friction resistance is small and the opening and closing is flexible. The unique "0" ring and the floating shaft seal replace the original butterfly valve
The packing is easy to open in the sealing process

Design: gb12237-89
Flange connection: GB / t17241.6-1998, GB / t9115 (steel)
Structural length: gb12221-89

Material of main parts

Valve body and cover	GB	WCB		ZG08Cr18Ni9		ZG08Cr18Ni12Mo2			ZG18Cr1Mo1V
	ASTM	WCB		CF8		CF8M			WC9
sphere	GB	WCB	nitridation     polishing	08Cr18Ni9	DB12     polishing	08CR18Ni12Mo2		DB12     polishing	08Cr18Ni9	D812     polishing
	ASTM	WCB		304		316			304
Stem	GB	2Cr13		08Cr18Ni9		08Cr18Ni12Mo2			25CrMo1V
	ASTM	1420		304		316			F22a
valve seat	GB	2Cc13	D507Mo   PTFE、PPL	08Cr18Ni9	D802   PTFE、PP	08Cr18Ni12Mo2	D802     PTFE、PPL		25CrMo1V		D802     PTFE、PPL
	ASTM	420		304		316			F22a
filler	GB	Flexible graphite
	ASTM	Flexible graphite
Bolt	GB	35CrMoA		08Cr18Ni9		08Cr18Ni12Mo2			25Cr2Mo1V
	ASTM	A193 B7		A320-B8		A193-B8M			F22a
Nut	GB	45		08Cr18Ni9		08Cr18Ni12Mo2			20CrMo
	ASTM	A194 2H		A194-8		A194-8M			A194-4

 

Pressure rating		Nominal pressurePN（MPa）
		0.25	0.6	1.0	1.6	2.5	4.0	6.4	10.0
Shell test pressure		0.38	0.9	1.5	2.4	3.8	6.0	9.6	15.0
Sealing test pressure	High pressure liquid sealing test	0.28	0.66	1.1	1.8	2.8	4.4	7.04	11.0
	Low pressure gas seal test	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6
Applicable conditions	Applicable media	See "application scope of various industries"”
	Applicable temperature	≤425℃
	Applicable conditions	Manual (3), electric (9), pneumatic (6), etc
	Nominal diameter	DN40～1000mm
Applicable codes	Design and manufacture	GB12237-89
	Structural length	GB12221-89
	Flange size	GB9113-2000、Can also be according to user requirementsAPI 6D-94
	Inspection and test	JB/T9092-99、GB/T13927-92

 

Nominal pressurePN	Nominal diameterDN	size（mm）Dimensions
		L	D	K	d	Y	b	Z-Φdo	Ws	Hs	Hw	Hd
1.6MPa	50	124	165	125	100	-	16	4-Φ18	230	164	260	310
	65	145	185	145	120	-	18	4-Φ18	250	180	275	330
	80	165	200	160	135	-	20	8-Φ18	300	200	300	360
	100	194	220	180	155	-	20	8-Φ18	320	235	335	390
	125	210	250	210	185	-	22	8-Φ18	400	260	335	405
	150	229	285	240	210	-	24	8-Φ23	500	280	375	440
	200	243	340	295	265	-	26	12-Φ23	800	320	410	470
	250	297	405	355	320	-	30	12-Φ25	100	355	485	550
	300	338	460	410	375	-	30	12-Φ25	1200	400	530	595
	350	400	520	470	435	-	34	16-Φ25	-	-	580	650
	400	400	580	525	485	-	36	16-Φ30	-	-	650	730
	450	502	640	585	545	-	40	20-Φ30	-	-	710	790
	500	533	715	650	608	-	44	20-Φ34	-	-	760	840
	600	686	840	770	718	-	48	20-Φ41	-	-	870	960
	700	762	910	840	788	-	50	24-Φ41	-	-	910	1080
	800	864	1025	950	898	-	52	24-Φ41	-	-	935	1125
	900	914	1125	1050	998	-	54	28-Φ41	-	-	995	1255
	1000		1255	1170	1110	-	56	28-Φ48	-	-	1080	1385
	1200		1485	1390	1325	-	58	32-Φ54	-	-	1175	1490
	1400		1685	1590	1525	-	60	36-Φ54	-	-	1280	1565
2.5MP	50	124	165	125	100	-	20	4-Φ18	230	164	260	310
	65	145	185	145	120	-	22	8-Φ18	250	180	275	330
	80	165	200	160	135	-	22	8-Φ18	300	200	300	360
	100	194	230	190	160	-	24	8-Φ23	320	235	335	390
	125	210	270	220	188	-	28	8-Φ25	400	260	355	405
	150	229	300	250	218	-	30	8-Φ25	500	280	375	440
	200	243	360	310	278	-	34	12-Φ25	800	320	410	470
	250	297	425	370	332	-	36	12-Φ30	1000	355	485	550
	300	338	485	430	390	-	40	16-Φ30	1200	400	530	595
	350	400	555	490	448	-	44	16-Φ34	-	-	580	650
	400	400	620	550	505	-	48	16-Φ34	-	-	650	730
	450	502	670	600	555	-	50	20-Φ34	-	-	710	790
	500	533	730	660	610	-	52	20-Φ41	-	-	760	840
	60td>	-	870	960
	700	762	960	875	815	-	60	24-Φ48	-	-	990	1080
	800	864	1085	990	930	-	64	24-Φ48	-	-	935	1125
	900	914	1185	1090	1025	-	66	28-Φ54	-	-	995	1255
	1000		138-Φ54	-	-	995	1255
	1000		1320	1210	1140	-	68	28-Φ58	-	-	1080	1385
	1200		1520	1420	1350	-	72	32-Φ58	-	-	1175	1490
1400		1755	1640	1560	-	78	36-Φ65	-	-	1280	1565

 

Note: due to the limitation of the number of words in the webpage, many sizes cannot be listed. If you have any requirements, please contact us at any time