Triple Offset Pneumatic Butterfly Valve

Description

Pneumatic Triple Offset Butterfly Valves

The Triple Offset Pneumatic Butterfly Valve represents an ideal solution for dependable flow management across different industrial operations. The valve features a triple offset disc which provides bubble-tight shut-off functionality while preventing disc-seal contact to reduce wear and increase operational life. The pneumatic actuator enables exact and quick adjustments in high-pressure and high-temperature systems through its precise and responsive control mechanism.

FEATURES Triple Offset Valves

• ISO 5211 bracket for easy mounting of actuators
• Triple offset and ellipsoidal sealing geometry
• Bubble tight shut-off
• Inherently firesafe by design
• A metal seal ring in Duplex and a highly wear-resistant Stellite grade 21 seat ensure prolonged superior tightness
• Single piece cast body with face to face dimensions to ISO5752, ASME B16.10 and API 609 double flanged short pattern, guarantees interchangeability with other valve types
• Extensively hardened bearings, incorporating a standard reinforce, braided, flexible graphite bearing protector, ensure increased reliability
• Blowout proof devices on shaft keep sure safety of shaft operating
• Pin-less shaft to disc connection makes the valve convenient for parts replacement and reliable even under corrosion

Connection	Double flange
Size	3″-80″ for PN10,PN16,Class150; 3″-48″ for PN25,PN40,Class300; 3″-24″ for Class600
Pressure	PN10,PN16,PN25,PN40,Class150,Class300,Class600
Flange standard	ASME B16.5 Class150,Class300,Class600; EN1092 PN16,PN25,PN40
Face to face	ISO 5752, ASME B16.10, API609 Double flanged short pattern
Pressure test	API 598, ISO 5208 Rate A, ANSI B16.104(ANSI/FCI 70-2)Class Ⅵ
Temperature	-29°C to +538°C
Operator	Lever，Gear box，Pneumatic actuator，Electric actuator

Pneumatic actuator

action
Double acting	Failure to maintain
Single acting normally closed	Failure to close
Single acting normally open	Failure to open
Optional accessory	Solenoid valve limit switch box air filter relief pressure valve, E/P positioned manual device.

No.	Part name	Material
1	Body	WCB	CF8M
2a	Disc	WCB,CF8	CF8M
2b	Disc sealing	UNS31803(duplex)+graphite
2c	Disc sealing retainer	SS304	SS316
2d	Disc sealing retainer screw	SS304	SS316
3	Seat welded surface	Stellite Gr.21
4	Shaft	17-4 PHSS,1.4462
5	Packing gland	CF8
6	Bottom cover	Same as body
7	Cover seal	Graphite
8	Thrust washer	SS316
9	Bracket	WCB	CF8M
10	Retaining ring	SS304
11	Packing	RPTFE, Graphite
12	Packing ring	SS316
13	Bearing	SS316+PTFE
14	Thrust bearing	SS316
15	Key	SS316
16	Bolt	SS304
17	Bolt	SS304
18	Bolt	SS304
19	Nut	SS304

SIZE		A	B	C	D				E	Top Flange	L	WT(kg)
					Class150	PN10	PN16	PN25
DN	INCH	Class150,PN10,PN16,PN25
80	3″	260	125	17.5	190	200	200	200	14	F07	114	30
100	4″	290	141	17.5	230	220	220	235	14	F07	127	40
125	5″	310	150	17.5	255	250	250	270	14	F07	140	45
150	6″	330	165	18.5	280	285	285	300	17	F10	140	50
200	8″	385	214	24.5	345	340	340	360	22	F10	152	85
250	10″	425	243	24.5	405	395	405	425	22	F10	165	120
300	12″	490	286	30	485	445	460	485	27	F12	178	160
350	14″	525	312	30	535	505	520	555	27	F12	190	195
400	16″	545	350	39	595	565	580	620	36	F14	216	255
450	18″	580	383	49	635	615	640	670	46	F16	222	310
500	20″	640	407	49	700	670	715	730	46	F16	229	390
600	24″	690	484	60	815	780	840	845	55	F25	267	565
700	28″	720	525	130	925	895	910	960	80	F30	292
750	30″	750	550	130	985				80	F30	318
800	32″	760	600	130	1060	1015	1025	1085	98	F30	318
900	36″	795	660	150	1170	1115	1125	1185	120	F35	330
1000	40″	815	720	180	1290	1230	1255	1320	130	F35	410
1050	42″	850	750	180	1345				150	F35	410
1200	48″	995	825	200	1510	1455	1485		180	F40	470

SIZE		A	B	C	D		E	Top Flange	L	WT(kg)
					Class300	PN40
DN	INCH	Class300,PN40
80	3″	260	100	17.5	210	200	14	F07	180	30
100	4″	290	124	17.5	255	235	14	F07	190	40
125	5″	330	144	18.5	280	270	17	F10	200	60
150	6″	350	150	24.5	320	300	22	F10	210	75
200	8″	415	204	30	380	375	27	F12	230	115
250	10″	455	238	39	445	450	36	F14	250	170
300	12″	490	268	39	520	515	36	F14	270	170
350	14″	545	294	49	585	580	46	F16	290	315
400	16″	575	320	60	650	660	55	F25	310	415
450	18″	660	341	60	710	685	55	F25	330	490
500	20″	700	383	80	775	755	75	F30	350	600
600	24″	785	442	80	915	890	75	F30	390	900
700	28″	800	590	150	1035		120	F35	430
750	30″	830	600	180	1090		130	F35	450
800	32″	860	720	200	1150		170	F40	470
900	36″	940	780	200	1270		180	F40	510
1000	40″	910	750	250	1240		200	F48	550
1050	42″	950	800	250	1290		210	F48	570
1200	48″	1000	850	250	1465		220	F48	630

SIZE		A	B	C	D			E	Top Flange	L	WT(kg)
					Class600	PN63	PN100
DN	INCH	Class600,PN63,PN100
80	3″	260	145	17.5	210	215	230	14	F07	180	50
100	4″	298	185	24.5	275	250	265	22	F10	190	70
125	5″	400	200	30	330	295	315	27	F12	200	90
150	6″	420	216	39	355	345	355	36	F14	210	125
200	8″	445	265	39	420	415	430	36	F14	230	200
250	10″	505	315	49	510	470	505	46	F16	250	315
300	12″	600	362	49	560	530	585	46	F16	270	435
350	14″	610	390	60	605	600	655	55	F25	290	485
400	16″	680	440	60	685	670		55	F25	310	685
450	18″	683	460	80	745			75	F30	330	815
500	20″	795	526	80	815			75	F30	350	1050
600	24″	885	623		940				F35	390	1600
700	28″
750	30″
800	32″
900	36″
1000	40″
1050	42″
1200	48″

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FAQS

What is the difference between single, double, and triple offset butterfly valves?

The zero leak valve classification belongs to triple offset valves but Class VI shut off valves belong to double offset or high performance valves. The offset type in butterfly valves depends on the application requirements and the performance specifications of the valve.

What are the disadvantages of triple offset valves?

Triple offset valves Main advantagesZero leakage, suitable for high pressure and high temperature conditions, long service life

Butterfly valve ASME ANSI CLASS300LB Flange size chart

NPS	DN	OD	PCB	Bolt	n-bolt
1/2	DN15	95	66.5	16	4
3/4	DN20	117	82.6	19	4
1	DN25	124	88.9	19	4
11/4	DN32	133	98.6	19	4
11/2	DN40	155	114.3	22.5	4
2	DN50	165	127	19	8
21/2	DN65	190	149.4	22.5	8
3	DN80	210	168.1	22.5	8
31/2	(DN90)	229	184.2	22.5	8
4	DN100	254	200.2	22.5	8
5	DN125	279	235	22.5	8
6	DN150	318	269.7	22.5	12
8	DN200	381	330.2	25.5	12
10	DN250	444	387.4	28.5	16
12	DN300	521	450.8	32	16
14	DN350	584	514.4	32	20
16	DN400	648	571.5	35	20
18	DN450	711	628.6	35	24
20	DN500	775	685.8	35	24
22	(DN550)	838	743	41	24
24	DN600	914	812.8	41	24