Product Design Features 

Serial floating ball valves are mainly applied to natural gas,oil products,chemical engineering, metallurgy,city building,environment protection,pharmacy and food industries,among which the anti-sulphur series are used for long delivery pipes of natural gas that contains hydrogen sulphide medium,a lot of impurity and corrosive substances.

The main structure features include:

1.Specific Sealing Structure of Valve Base Double cant elastic seal ring or V-shaped groove seal ring structural design is adopted to ensure sealing reliability.As for Iow-pressureo,ultralow pressure or vacuum-operated ball valves,a plate spring-loaded sealing structure of valve base is adopted to ensure their longterm sealing reliability.As for moderate or high temperature ball valves,para-position polyphenylene or mental can be adopted for valve base material. 2.Automatic pressure relief structure When the pressure in cloaca cavity increases singularly,the cavity medium can push valve base by its own thrusting force,which results in automatic pressure relief and valve security assurance. 3.Reliable Sealing of Valve Rod The valve rod adopts downward installation structure with back sealing.The sealing force will increase together with the heig-htening of medium pressure,which can ensure the sealing reliability.Moreover,even if the pressure in valve cavity increases singularly,the valve rod will not burst out. 4.Fire-resistant Structure According to the operating condition and users requirement,ball valve can be designed with a fire resistant structure up to the fire-resistant standards of API607,API 6FA and JB/T6899.Once the soft seal ring is burnt out on fire,the structure can avoid serious leaking of  the medium and prevent the fire from scaling up. 5.Anti-static Structure While operating the valve,the friction between the sphere and the base will produce static charges accumulating on the sphere.To avoid static sparkle,the fire-resistant device is designed to derive the accumulated static sparkle,charges from the sphere. 6.Locking Device Alocking structure is designed on the full-open and full-close spots of manual ball valves to avoid abnormal open-and-close pro-duced by misoperation or unpredictable circuit vibration.On production lines of petroleum and chemicals of flammable mediums,and during the course of outdoor piping,the design is especially advantageous and practical. 7.Full Bore Structure and Reduced Bore Structure The two structure series are produced to meet different requirements of users.The passage inside diameter of full diameter ball valves is the same as that of valve pipe,which is convenient for pipe cleaning.The weight of retractive diameter ball valves is relatively lighter,but the fluid resistance is just 1/7 that of stop valves with the same caliber.Therefore,the application prospects of retractive diameter series is much better.

Main External Connection Dimensions

DN(mm)	Size				Flange Size
					PN1.6MPa				PN2.5MPa
	L	H	H1	L1	D	D1	D2	n-φd	D	D1	D2	n-φd
15	130	185	/	140	95	65	46	4-14	95	65	46	4-14
20	140	191	/	140	105	75	45	4-14	105	75	56	4-14
25	150	193	/	140	115	85	65	4-14	115	85	65	4-14
32	165	212	/	164	140	100	76	4-18	140	100	76	4-18
40	180	217	/	164	150	110	84	4-18	150	110	84	4-18
50	200	260	102	190	165	125	99	4-18	165	125	99	4-18
65	220	293	114	210	185	145	118	4-18	185	145	118	8-18
80	250	323	127	247	200	160	132	8-18	200	160	132	8-18
100	280	382	152	276	220	180	156	8-18	235	190	156	8-22
125	320	468	184	348	250	210	184	8-18	270	220	184	8-26
150	360	510	219	378	285	240	211	8-22	300	250	211	8-26
200	400	655	273	524	340	295	266	12-22	360	310	274	12-26
250	630	/	360	/	405	355	319	12-26	425	370	330	12-30
300	750	/	395	/	460	410	370	12-26	485	430	389	16-30