Most of the valves in the world's most exquisite and cost-effective ball valve network system are mainly used to cut off and regulate the medium. These valves account for a large proportion of the whole system and have a large amount of consumption. They are required to be durable and cost-effective. They should be able to adjust and cut off the medium when the medium is in forward flow, and can prevent the medium backflow during the pressure difference transformation or maintenance, that is, it has two-way Cut off function. At present, the main application of these valves in the pipe network system are stop valve, gate valve, butterfly valve and ball valve. The globe valve and gate valve have good two-way cut-off function, good sealing performance and service life. They are both the first of the valve. However, due to the congenital restriction of the cut-off structure, the globe valve has large shape and large operating torque, so it is unable to produce large diameter. At present, the largest one in the market is only dn400; The gate valve has no regulating function, so there is a great danger that the gate will fall off when it is used to regulate the flow. However, the large diameter gate valve has many difficulties in manufacturing and transportation because of its huge shape and height. Compared with gate valve, butterfly valve has the characteristics of short opening and closing time, small operating torque, small installation space and light weight. In some working conditions, butterfly valve is used instead of gate valve. But for a long time, the sealing performance of butterfly valve has not fully met the market requirements. In addition to the middle line rubber lined butterfly valve can be sealed in a certain pressure range, other structures are basically unidirectional flow. The middle line structure can not be popularized due to the limitation of rubber. After improvement, the bi-directional butterfly valve with stainless steel elastic plate structure appears in the market, but its price is high, its service life is limited, and it has not been popularized. Ball valve with small flow resistance, long life and many other advantages, has been recognized by the market, but its price is high. At present, it is mainly used in oil, natural gas, gas and other media more important pipeline, in general pipe network, especially in water system.

Is there any valve with superior performance, moderate price, adjustable, bi-directional sealing, and not limited by caliber and space size?

The answer is yes! The bi-directional hard seal ball valve developed by Shanghai European Valve Co., Ltd. can fully meet the above requirements. The valve combines the superior sealing performance of ball valve and the superior structural performance of butterfly valve, which makes it not only has the performance advantages of bi-directional sealing, adjustable and long service life of ball valve, but also has the structural advantages of small volume and light weight of butterfly valve. In fact, it is an eccentric hemisphere valve with butterfly structure! Led by the post doctoral cooperation research and development center of our company and supported by the Postdoctoral Station of Hunan University, the modern design methods and technologies were adopted for the valve, including static simulation analysis, dynamic simulation analysis, multidisciplinary design optimization and performance analysis, etc., which highlighted the solution to the problems of energy consumption, consumables, pressure loss and sealing performance of the existing valve, and developed a new generation with low energy consumption, low energy consumption, high pressure loss and sealing performance This paper introduces a new design method and technology for large diameter ball valve with two-way hard seal. The book is published by China Water Conservancy and Hydropower Publishing House (available in major bookstores nationwide). Compared with the traditional globe valve and gate valve with two-way sealing function, the valve breaks through the limitation of diameter and space size, and has absolute cost-effective advantage compared with ball valve in water system pipe network. It can be widely used in metallurgy, mining, petrochemical, chemical, electric power, environmental protection, municipal and other industries and departments of the pipe network system, as the opening and closing, regulating use.

Driving mode:

Code name	3	6	7	9
Driving mode	Worm gear	Pneumatic	Hydrodynamics	Electric

Sealing surface material:

Code name	H	R	Y
Sealing surface material	Martensite does not induce steel	austenitic stainless steel	Cemented carbide

Nominal pressure:

Code name	6	10	16	25	40	63
Nominal pressure（Mpa）	0.6	1.0	1.6	2.5	4.0	6.3

Shell material:

Code name	C	P	R
Material Science	WCB	lCrl8Ni9Ti     ZGlCrl8Ni9Ti	lCrl8Nil2MoTi、     ZGlCrl8Nil2MoTi

Main application of bidirectional hard seal ball valve

Two way hard seal ball valve is widely used in pump outlet, pipe network system, especially municipal, fire control and other network, annular pipe network. In this kind of two-way flow condition, one valve is equivalent to two ordinary one-way sealing valves, with high cost performance. It can be used to open, close and adjust the medium of pipe network system in metallurgy, petrochemical, electric power, chemical industry, environmental protection, municipal and other industries and departments.

Main design and manufacturing standards

The latest version of undated reference documents is applicable to this product.

Standard content	Standard number	Standard name
Enterprise standard	Q/OPJF006-2012	GWXDFDouble direction flow hard impact hard seal ball valve
Design and manufacture standard	CJ/T283-2008	Eccentric hemisphere valve of Urban Construction Department
	GB/T12237	Design and manufacture standard
	GB/T12238	General purpose valves - Flanged and wafer butterfly valves
Structural length standard	GB/T12221	Metal valve structure length
Flange standard	GB/T9113.1-4	Integral steel pipe flange / customer specified standard
	GB/T17241.6	Integral cast iron pipe flange
Inspection and test standards	GB/T13927	Pressure test for general purpose valves
	JB/T9092	Test and inspection of valves
Standard of materials used	GB/T12227	Technical conditions of ductile iron castings for general purpose valves
	GB/T12229	Technical specification of carbon steel castings for general purpose valves
		Technical requirements of austenitic steel castings for general purpose valves

Nominal diameter(mm)	Nominal pressure(MPa)	Test pressure(MPa)			Test pressure(C)	Applicable media
		Shell strength test	Forward sealing test	Reverse sealing test
DN50~3000 mm	0.6	0.9	0.66	0.66	0-80 is not indicated. (: below, can produce below 0-200 ℃	Water, sewage, oil, etc
	1.0	1.5	1.1	1.1
	1.6	2.4	1.76	1.76
	2.5	3.75	2.75	2.75
	4.0	6.0	4.4	4.4
	6.3	9.45	6.93	6.93

 

Part name	Material Science
	name	Brand
Brand	cast steel	WCB
	austenitic stainless steel	304、 316
Valve plate	cast steel	WCB
	austenitic stainless steel	304、 316
Stem	Martensitic stainless steel	1013、2Crl3
valve seat	austenitic stainless steel	304、 316
	Nitriding of Ni Cr nodular iron	QT400Ni2Cr
Bearing	Aluminum bronze, tin bronze	ZCuAl1OFe3, ZCuSn5-5-5
Sealing element	rubber	NBR、EPDM

1. Main types: the main types of the valve are worm gear, electric, pneumatic and hydraulic, among which pneumatic valve and hydraulic valve are suitable for occasions with pressure gas source and pressure liquid source.

Driving mode	worm drive	Hydrodynamics	Electric	Pneumatic
Flange model	GWXDF3204	GWXDF7204	GWXDF9204	GWXDF6204

Working principle: the sealing surface of the valve core is cubic curved surface, and the sealing surface of the valve seat is a conical surface. At the sealing point, the seat surface is actually the section of the valve core cubic curved surface (see Figure), so its combination is perfect. It has the function of self-adaptive (center automatic positioning and reclosing) and wear compensation.

 

Because the rotation center deviates from the geometric center of the valve core, there will be the actual effect of the valve core body constantly moving backward and inward when the valve core is opened, and the valve core body is constantly moving forward and expanding outward when the valve core is closed. Its function is equivalent to the synthesis of hemispherical valve, gate valve, globe valve and butterfly valve. Open the change diagram of different angles:

The main function of the two-way flow valve is that it can not only seal well under the forward pressure, but also seal well when the reverse pressure or the reverse pressure is greater than the positive pressure. When the positive pressure is applied, the medium pressure pushes the valve plate to move forward, and the valve rod is elastically deformed. The sealing surface of the valve plate is close to the sealing surface of the valve seat to transmit pressure and push the valve seat to the valve body step to make it well sealed. When the reverse pressure acts, the medium pressure pushes the valve plate to move backward, and the valve rod is elastically deformed. The medium pressure simultaneously pushes the valve seat to move backward, so that the sealing surface of the valve seat is close to the sealing surface of the valve plate, and the sealing specific pressure is maintained to make the valve seat seal well.

 

Electric installation and power description of bidirectional hard seal ball valve

Valve diametermm)	Electric fitting model	Output speed(r/min)	Motor power（KW)	Motor current（A)
150	DZW15	24	0.37	1.6
200	DZW20	18	0.37	1.6
250	DZW20	18	0.37	1.6
300	DZW30	18	0.55	2.4
350	DZW30	18	0.55	2.4
400	DZW45	24	1.1	3.4
450	DZW45	24	1.1	3.4
500	DZW60	24	1.5	4.5
600	DZW60	24	1.5	4.5
700	DZW90	24	2.2	6.5
800	DZW120	24	3	9
900	DZW120	24	3	9

1000	DZW120	24	3	9
1200	DZW180	24	4	11
1400	DZW250	24	5.5	14
1600	DZW350	18	7.5	19
1800	DZW350	18	7.5	19
2000	DZW500	18	10	26

The above are the electrical installation parameters of Changzhou Lanling valve control Co., Ltd. if the user needs to use the electric installation parameters of other companies, they can be replaced according to the above parameters. Three phase AC motor, 380V (special order 660 V or 220 V), 50 Hz (special order 60 Hz), can be selected according to user requirements.

 

0.6-1.0MPaConnection and installation dimension table of bidirectional hard seal ball valve

 

DN	0.6MPa				1.OMPa				L	H	E			H
	D	D1	D2	N-d	D	D1	D2	N-d			Manual	Pneumatic	Electric	Manual	Pneumatic	Electric
150	265	225	199	8-18	285	240	211	8-22	140	175	280	355	315	555	800	705
200	320	280	254	8-18	340	295	266	8-22	152	200	425	250	315	760	850	775
250	375	335	309	12-18	395	350	319	12-22	165	230	425	250	315	830	925	945
300	440	395	363	12-22	445	400	370	12-22	178	260	560	450	315	895	1035	1070
350	490	445	413	12-22	505	460	429	16-22	190	300	560	450	315	950	1070	1140
400	540	495	463	16-22	565	515	480	16-26	216	340	580	450	315	1190	1190	1210
450	595	550	518	16-22	615	565	530	20-26	222	350	580	650	714	1255	1250	1335
500	645	600	568	20-22	670	620	582	20-26	229	380	580	650	714	1305	1290	1415
600	755	705	667	20-26	780	725	682	20-30	267	450	660	850	810	1340	1455	1605

700	860	810	772	24-26	895	840	794	24-30	292
800	975	920	878	24-30	1015	950	901	24-33	318
900	1075	1020	978	24-30	1115	1050	1001	28-33	330
1000	1175	1120	1078	28-30	1230	1160	1112	28-36	410
1200	1405	1340	1295	32-33	1455	1380	1328	32-39	470
1400	1630	1560	1510	36-36	1675	1590	1530	36-42	530
1600	1830	1760	1710	40-36	1915	1820	1750	40-48	600
1800	2045	1970	1918	44-39	2115	2020	1950	44-48	670
2000	2265	2180	2125	48-42	2325	2230	2150	48-48	760
2200	2485	2400	2340	52-42	2560	2440	2400	52-56	800
2400	2685	2600	2540	56-42	2760	2650	2610	56-56	850
2600	2905	2810	2740	60-48	2960	2850	2810	60-56	900
2800	3115	3020	2960	64-48	3180	3070	3030	64-56	950

 

480	550	850	810	1520	1585	1844
530	550	1250	810	1710	1700	2040
580	550	1250	863	1810	1965	2255
650	750	1250	863	1960	2015	2380
760	925	1250	863	2250	2250	2640
850	925	1250	1055	2434	2550	2866
1030	925	1250	1055	2780	2750	3156
1230	980	1250	1183	3020	2950	3421
1350	980	1500	1286	3270	3350	3685
1300
1400
1500
1610

3000

3315

3220

3160

68-48

3400

3290

3250

 

1.6-2.5MPaConnection and installation dimension table of bidirectional hard seal ball valve

 

DN	1.6MPa				2.5MPa				L	H	E			H
	D	D1	D2	N-d	D	D1	D2	N-d			Manual	Pneumatic	Electric	Manual	Pneumatic	Electric
150	285	240	211	8-22	300	250	211	8-26	140	175	280	355	315	555	800	705
200	340	295	266	12-22	360	310	274	12-26	152	200	425	250	315	760	850	775
250	405	355	319	12-26	425	370	330	12-30	165	230	425	250	315	830	925	945
300	460	410	370	12-26	485	430	389	16-30	178	260	560	450	315	895	1035	1070
350	520	470	429	16-26	555	490	448	16-33	190	300	560	450	315	950	1070	1140
400	580	525	480	16-30	620	550	503	16-36	216	340	580	450	315	1190	1190	1210
450	640	585	548	20-30	670	600	548	20-36	222	350	580	650	714	1255	1250	1335

 

500	715	650	609	20-33	730	660	609	20-36	229
600	840	770	720	20-36	845	770	720	20-39	267
700	910	840	794	24-36	960	875	820	24-42	292
800	1025	950	901	24-39	1085	990	928	24-48	318
900	1125	1050	1001	28-39	1185	1090	1028	28-48	330
1000	1255	1170	1112	28-42	1320	1210	1140	28-55	410
1200	1485	1390	1328	32-48	1530	1420	1350	32-55	470
1400	1685	1590	1530	36-48	1755	1640	1560	36-60	530
1600	1930	1820	1750	40-55	1975	1860	1780	40-60	600
1800	2130	2020	1950	44-55	2195	2070	1985	44-68	670
2000	2345	2230	2150	48-60	2425	2300	2210	48-68	760

580	650	714	1305	1290	1415
660	850	810	1340	1455	1605
550	850	810	1520	1585	1844
550	1250	810	1710	1700	2040
550	1250	863	1810	1965	2255
750	1250	863	1960	2015	2380
925	1250	863	2250	2250	2640
925	1250	1055	2434	2550	2866
925	1250	1055	2780	2750	3156
980	1250	1183	3020	2950	3421
980	1500	1286	3270	3350	3685

4.0-6.3MPaConnection and installation dimension table of bidirectional hard seal ball valve

 

DN	4.0MPa					6.3MPa				L	H	E			H
	D	D1	D2	N-d		D	D1	D2	N-d			Manual	Pneumatic	Electric	Manual	Pneumatic	Electric
150	300	250	211	8-26	345	280	211	8-33	140	175	280	355	315	555	800	705
200	375	320	284	12-30		415	345	284	12-36	152	200	425	250	315	760	850	775
250	450	385	345	12-33		470	400	345	12-36	165	230	425	250	315	830	925	945
300	515	450	409	16-33		530	460	409	16-36	178	260	560	450	315	895	1035	1070
350	580	510	465	16-36		600	525	465	16-39	190	300	560	450	315	950	1070	1140
400	660	585	535	16-39		670	585	535	16-42	216	340	580	450	315	1190	1190	1210
450	685	610	560	20-39						222	350	580	650	714	1255	1250	1335

500	755	670	615	20-42					229	380	580	650	714
600	890	795	735	20-48					267	450	660	850	810

Note: for other pressure levels, please consult the technical department of the company. Different connection standards can be designed and produced according to user requirements.
Due to product improvement, there may be differences between the material object and the publicity materials. The company reserves the right to interpret the above data. Please contact the company's technical department when ordering specific parameters.

 

 

1) There shall be no reduction, elbow, bellows, etc. on the pipes within 0.5dn length before and after the installation;
2) If butterfly valve, pipe force valve, butterfly check valve or butterfly slow closing check valve are installed immediately before and after the valve, the distance between two adjacent valves is 1.0dn;
3) During assembly, installation, transportation, maintenance and repair or disassembly of valve plate, pay attention not to touch the sealing surface and take strict protection measures;
4) The valve plate shall be closed during assembly, transportation, installation and storage;
5) If it is necessary to disassemble, pay attention not to damage the shaft sleeve to prevent the loss of taper pin and shaft sleeve;
6) After assembly, installation, maintenance and repair, the metal chips, dirt and impurities in the valve shall be removed, and the sealing surface of surfacing welding shall be wiped clean;
7) Regardless of horizontal or vertical installation, when the flow direction cannot be determined, when the valve is opened, the butterfly valve has a large face and the end is facing the inlet direction;
8) If it is not used for a long time, please coat the sealing surface with grease or oil paper, and cover the sealing surface with wax paper.

Comparison of two way hard seal ball valve with other valves with some functions

Two way hard seal ball valve	Soft seal center line butterfly valve	Multi level butterfly valve	Two way flow butterfly valve with elastic plate	Eccentric hemisphere valve
1、It can be reliably sealed in both directions and can meet the national pressure test standard	It can be pressurized in both directions and sealed by rubber deformation at the edge	It can't be sealed in both directions. When the reverse direction reaches 0.1-0.3mpa, it will open automatically and leak water	It can be bi-directional, but long-term reverse will cause permanent deformation and failure	Can't double direction, reverse automatic opening, water leakage
2、The sealing surface of valve seat and valve core can be made into high hard sealing surface	At least one side of valve seat or valve plate is rubber soft seal	At least one side of valve seat or valve plate is rubber soft seal	- the edge is a fully formed stainless steel elastic sheet,	Both sides can be stacked hard, but if the sphere is too hard, it is difficult to ensure the machining accuracy
3、It has the function of sealing automatic compensation after wear	Once the rubber is worn and damaged, the seal will be invalid	It can't be compensated. It will shrink and leak when it is touched by many layers	If the elastic plate is worn, it will fail	It can be compensated
4、When closing, it can cut off the long strip impurities and eliminate the granular impurities	High hard impurities will damage the seal	Impurities will destroy the graphite part of the multilayer structure and make the seal invalid	The strength of the elastic sheet is low and easy to be destroyed by impurities	When closing, it can cut off the long strip impurities and eliminate the granular impurities
5、There is no friction between the sealing surface of valve core and valve seat when closing	It's completely rubbed into the seal	High precision three eccentric without friction, otherwise there is friction	The friction is very serious	There is no friction between the sealing surface of valve core and valve seat when closing

4、When closing, it can cut off the long strip impurities and eliminate the granular impurities	High hard impurities will damage the seal	Impurities will destroy the graphite part of the multilayer structure and make the seal invalid	The strength of the elastic sheet is low and easy to be destroyed by impurities	When closing, it can cut off the long strip impurities and eliminate the granular impurities
5、There is no friction between the sealing surface of valve core and valve seat when closing	It's completely rubbed into the seal	High precision three eccentric without friction, otherwise there is friction	The friction is very serious	There is no friction between the sealing surface of valve core and valve seat when closing
6、The structure is short in length and light in weight. It can be made into large diameter valve	The structure is short in length and light in weight. It can be made into valve with caliber	The structure is short in length and light in weight. It can be made into valve with caliber	The structure is short in length and light in weight. It can be made into large diameter valve	Long structure, heavy weight, can not be made into large diameter valve