Scope of application

This product is the second generation of two-way hard contact ball valve developed by our company after years of dedicated research and technology cooperation with Zhejiang University and Hunan Changsha University on the basis of the first generation of two-way elastic hard seal ball valve and butterfly valve. The same product has solved two world problems at the same time, that is, the sealing surface of the valve seat and valve plate does not move or deform relative to each other, but resists the medium pressure or differential pressure in both directions, and achieves zero leakage under the condition of hard contact sealing, It has realized the dream that the world valve industry has been striving for for many years and created a new starting point and milestone for the valve industry.This product is widely used in steel, metallurgy, electric power, petroleum, petrochemical, chemical, tap water, paper making, pharmaceutical, environmental protection and other industries and departments.

Structural characteristics

The main body of this product is the combination of ball valve and butterfly valve, and the main structure is similar to butterfly valve, while the valve core is part of the sphere, that is, the actual effective part of the valve core from the sphere, that is, the part near the sealing surface. The valve seat is a series ring body, and the rotation center of the valve core is not concentric with the center of the sphere. It can be seen from the profile that the contact between the arc surface of the sphere and the ring cone is a point contact, and a continuous line seal is formed on the solid diagram. However, the contact point between the arc surface of the sphere and the ring cone and the vertical foot formed by the center of the sphere are not perpendicular to the section line of the ring cone. In other words, the sealing surface of the valve seat is not a continuous surface formed by the tangent line of the sphere. When there is a reverse pressure or the reverse pressure is greater than the positive pressure, the back pressure difference will be formed, and the valve seat will automatically compensate the sealing clearance in series, so as to achieve two-way sealing. The greater the applied pressure, the better the effect of two-way sealing.

Standards adopted

1. The design shall be in accordance with GB/T12237-2007 Flanged and Butt Welding Steel Ball Valves for General Purpose Valves, GB/T 21385-2008 Metal Seal Ball Valves, GB/T12238-2008 Flanged and Wafer Connection Butterfly Valves for General Purpose Valves, API 608 Flanged, Threaded and Welded Metal Ball Valves, BSS SP-72 Flanged and Butt Welding Ball Valves for General Purpose, API 609 Lug and Flat Plate Butterfly Valves, and MSS SP-67-2002 Butterfly Valves.2. The pressure and temperature rating shall comply with GB/T12224 General Requirements for Steel Valves, API 608 Flanged, Threaded and Welded Metal Ball Valves, and API 609 Lug and Flat Plate Butterfly Valves.3. Flanges shall comply with Raised Face Integral Steel Pipe Flanges (GB/T9113.1-2000), Integral Cast Iron Pipe Flanges (GB/T 17241.6-1998), Cast Iron Pipe Flanges and Flanged Fittings (ASME B16.1), Pipe Flanges and Flanged Fittings (ASME B16.5), Large Diameter Flanges (ASME B16.47), and Round Flanges for Pipe Valves and Fittings (BS4504).4. The structural length shall comply with GB/T 12221-2005 Structural Length of Metal Valves or API 609 Lug and Flat Plate Butterfly Valves.5. The inspection and test shall be in accordance with GB/T13927-2008 Pressure Testing of Industrial Valves or API 598-2009 Inspection and Testing of Valves.6. The electric valve is equipped with manual operation device; The manual device is driven by worm gear.

Main overall dimensions

Nominal diameterDN	Overall dimensions			Flange size
				0.6MPa			1.0MPa			1.6MPa			2.5MPa
	L	H	H1	D	D1	Z-d	D	D1	Z-d	D	D1	Z-d	D	D1	Z-d
50	108	219	130	110	110	4-14	165	125	4-18	165	125	4-18	165	125	4-18
65	112	260	140	130	130	4-14	185	145	4-18	185	145	4-18	185	145	4-18
80	114	267	148	150	150	4-18	200	160	8-18	200	160	8-18	200	160	8-18
100	127	302	162	170	170	4-18	220	180	8-18	220	180	8-18	235	190	8-18
125	140	317	177	200	200	8-18	250	210	8-18	250	210	8-18	270	220	8-22
150	140	332	192	225	225	8-18	285	240	8-22	285	240	8-22	300	250	8-26
200	152	410	228	280	280	8-18	340	295	8-22	340	295	12-22	360	320	12-26
250	165	436	263	335	335	12-18	395	350	12-22	405	355	12-26	425	310	12-30
300	178	300	500	395	395	12-22	445	400	12-22	460	410	12-26	485	370	16-30
350	190	320	510	445	445	12-22	505	460	16-22	520	470	16-26	555	430	16-33
400	216	330	520	495	495	16-22	565	515	16-26	580	525	16-30	620	490	16-36
450	222	380	590	550	550	16-22	615	565	20-26	640	585	20-30	670	550	20-36
500	229	390	610	600	600	20-22	670	620	20-26	715	650	20-33	730	660	20-36
600	267	450	665	705	705	20-26	780	725	20-30	840	770	20-36	845	770	20-39
700	292	480	730	810	810	24-26	895	840	24-30	910	840	24-36	960	875	24-42
800	318	580	910	920	920	24-30	1015	950	24-33	1025	950	24-39	1085	990	24-48
900	330	625	930	1020	1020	24-30	1115	1050	28-33	1125	150	28-39	1185	1090	28-48
1000	410	660	1000	1120	1120	28-30	1230	1160	28-36	1255	1170	28-42	1320	1210	28-55
1200	470	780	1100	1340	1340	32-33	1455	1380	32-39	1485	1390	32-48	1530	1420	32-56
1400	530	880	1220	1560	1560	36-36	1675	1590	36-42	1685	1590	36-48	1755	1640	36-62
1600	600	990	1330	1760	1760	40-36	1915	1820	40-48	1930	1820	40-56	1975	1860	40-62
1800	670	1090	1430	1970	1970	44-39	2115	2020	44-48	2130	2020	44-56	2195	2070	44-70
2000	760	1200	1540	2180	2180	48-42	2325	2230	48-48	2345	2230	48-62	2425	2300	48-70