Metal Seated Ball Valve

• Features and pertormance
• 1.ZSQ is applied to high temperature and high pressure conduit systems.
• 2.Ball picecs expand to seal when closed,shrink and rotare without friciton between seal surfaces.
• 3.No seal damage while expanding and contracting,easily opened and closed with Zero leakage.
•  
• Structure & features
• Comparison of seal structures
• ZSQ valve adopts the rotary contraction rationale.The ball disc expands to contact the valve seat to realizes a good bi-directional sealing,and contracts to separate the seal faces with little friction during the separation,so it can be widely used in the system with high temperature and high pressure (See Figure 1 for details).For valves with a soft seat,the seal face is easy to be damaged because of its large whole ball torque,so they cannot be used in the high temperature and pressure conditions (See figure 2 for details).
• 
• Comparison of pressure release
• In a ZSQ three -clack ball valve the disc separated from the seat by bontracting the ball diameter,and the space between the disc and the seat formed after the separation helps to discharge pressure evenly and safely,so the operation torque and the seal face wearing are completely eliminated (See figure 3 for details).Such a structure completely solves the problem in a traditional three-clack ball valve that the pressure is discharged by aligning the four bores,which has two defects;one is that the pressure release bores introduce additional leaking points;the other is that the four seal faces between the wedge ball body and the discs are easy to be damaged by friction or by scratch of hard articiles,resulting leakage(See figure 4 foe details).
• 
• Comparison of seal face wear during the valve clack movement
• The ZSQ valve clack adopts fixed ring for positioning to open/close the passage and keep the two clacks in the center of valve seat to achieve a seat structure with no wear during expansion or contraction of the clack(See figure 5 for details).Such a seal structure solves the problem that a conventional float ball disc moves up and down to press the back and bottom seats,resulting leakage due to an uneven wear of the seal faces (See figure 6 for details).
•  
• Direction
• Standards:
• Designing & manufacturing are according to the regulations of ANSI 16.34 and ISO 7221.
• Flange-to-face dimension is by enterprise standards.
• Pressure test is according to API 598,ISO 5208.
• *Please contact us for items made according to other standards.
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• Coding system
•  
• Main Properties & Materials of components & parts:

  NO	Name	Carbon steel	Stainless steel
  1	Valve body	A216 WCB	A217 WC6	A351 CF8
  2	Disc	304(Surface treatment)
  3	Seat	410,420		304
  4	Stem	A194 2H ,A297 420		A182 F304
  5	Packing	Fle xible grqphite
  6	Guide	A420,A793 B22
  Suitable mediums		Water,steam,gas,Oil and etc.		Acetic acid nitric acid corrosive gas & wafer etc.
  Suitable temperature		-29-425℃	-29-595℃	-196-600℃

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• Dimensions
• 
• PN1.6MPa,Class150

  Nominal Dia		L	d1	Dn	H0	H1	D01	W.T.(Kg)
  mm	in
  50	2	230	48	58	140	330	200	48
  65	2.5	290	66	75	150	350	250	55
  80	3	310	78	90	160	400	250	75
  100	4	350	96	110	170	450	250	110
  125	5	400	120	135	180	470	300	150
  150	6	480	145	161	190	570	300	220
  200	8	600	200	222	230	780	350	340
  250	10	730	252	287	280	880	400	410
  300	12	850	301	330	300	950	450	570
  350	14	980	351	382	330	980	500	770
  400	16	1100	398	432	360	1070	600	1050

•  
• PN2.5MPa,PN4.0MPa,Class300

  Nominal Dia		L	d1	Dn	H0	H1	D01	W.T.(Kg)
  mm	in
  50	2	230	48	58	140	330	250	50
  65	2.5	290	66	75	150	350	250	580
  80	3	310	78	90	160	420	300	83
  350	96	110	170	660	300	175
  125	5	400	120	135	180	700	400	220
  150	6	480	145	161	190	740	400	235
  200	8	600	200	222	230	800	450	310
  250	10	730	252	287	280	900	450	430
  300	12	850	301	330	300	980	500	590
  350	14	980	351	382	330	1000	500	800
  400	16	1100	398	432	360	1100	600	960

•  
• PN6.4MPa,10.0MPa,Class600

  Nominal Dia		L	d1	Dn	H0	H1	D01	W.T.(Kg)
  mm	in
  50	2	292	45	58	150	590	250	50
  65	2.5	330	62	75	160	620	250	120
  80	3	356	75	90	170	700	300	160
  100	4	432	92	110	180	770	350	180
  125	5	508	112	135	200	780	350	215
  150	6	559	136	161	220	820	400	305
  200	8	660	190	222	260	890	450	500
  250	10	787	236	287	300	990	500	760
  300	12	838	284	330	340	1070	550	1080
  350	14	889	332	382	360	1120	600	1500
  400	16	991	376	432	400	1210	600	1830

•  
• PN16.0MPa,Class900

  Nominal Dia		L	d1	Dn	H0	H1	D01	W.T.(Kg)
  mm	in
  50	2	368	42	62	150	590	250	140
  65	2.5	419	54	75	170	620	300	190
  80	3	381	67	91	180	700	350	225
  100	4	457	92	117	200	770	350	270
  125	5	559	110	144	220	780	400	437
  150	6	610	140	172	240	820	450	490
  200	8	737	183	223	290	890	500	600
  250	10	838	230	278	340	990	550	780
  300	12	965	273	329	380	1070	600	1490

•  
• PN20.0MPa,Class1500

  Nominal Dia		L	d1	Dn	H0	H1	D01	W.T.(Kg)
  mm	in
  50	2	368	40	62	150	590	250	190
  65	2.5	419	54	75	170	620	300	240
  80	3	470	67	91	180	700	350	320
  100	4	546	87	117	200	770	400	395
  150	6	705	132	172	240	820	450	720
  200	8	831	173	223	290	890	500	870
  250	10	991	222	278	340	990	550	1270
  300	12	1130	267	329	380	1070	600	1510

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