Flanged Triple Offset Butterfly Valve

Carbon Steel (WCB, WCC for strength), Stainless Steel (SS304, SS316 for corrosion resistance)

Size Range:DN50-DN800

Connection Options:Flanged

Working Pressure:Up to 300 psi (20.7 bar)

Working Temperature:-29°C to 200°C

Sealing Options:304＋Flexible graphite+PTFE

Manufacturing Method:Cast, Forged, Machined

Applicable Medium:Water, Oil, Gas, Air, Chemical Fluids

Manufacturing Standard:API 609, GB / T 12238-2008

Product Overview

The Worm Gear Operated Flanged Triple Offset Butterfly Valve is an industrial valve engineered for precise flow control and reliable sealing in high-pressure and high-temperature environments. With a worm gear mechanism for smooth manual operation and a triple-offset design to minimize friction and wear, this valve ensures leak-proof performance over an extended lifespan. Its flanged connections make it secure and easy to integrate into a variety of pipeline systems.

Product Features

Effortless Control: Worm gear mechanism allows easy, controlled manual operation with minimal effort.

Enhanced Longevity: Triple offset construction reduces contact between the disc and seat, minimizing wear and extending service life.

Superior Leak Prevention: The triple-offset design ensures zero-leakage shutoff, even in demanding applications.

Stable Flanged Connection: Flanged ends provide a solid, secure fit in pipelines, reducing the risk of leaks.

Resilient in Harsh Conditions: Built to withstand extreme temperatures, pressures, and corrosive media.

Specification Parameters

Structural Length Standard:
According to API 609, ASME B16.47, ISO 5752, BS EN 558

Connection Forms Standards:
Wafer and lug types per ASME B16.5, flanged per ANSI/ASME B16.42, double flanged, and grooved

Available Sizes (Caliber):
DN50-DN800

Pressure-Temperature Rating:
Class 150, 300 as per API 609 and ASME B16.47

Pressure Range:
Up to 300 psi depending on size and material

Temperature Range:
-29°C to 200°C depending on material and sealing options

Main performance specifications

Nominal diameter	DN（mm）	50-800
Nominal pressure	PN（MPa)	1.0	1.6	2.5
test pressure	Strength test	1.5	2.4	3.75
	Seal test	1.1	1.76	2.75
	Gas seal test	0.6	0.6	0.6

Product parts materials

model		D343H-16	D343W-16P	D343W-16R
Work pressure（MPa）		1.6
Suitable temperature（℃）		≤425	≤200
Suitable media		Water, oil or non-corrosive media	Nitric acid medium	Acetic acid medium
material	Body, disc	WCB	CF8/304	CF3M/316L
	Valve stem	2Cr13	304	316L
	Valve stem	Surfacing507	－	－
	Butterfly sealing surface	304＋Flexible graphite	304＋PTFE	304＋PTFE
	filler	Flexible graphite	PTFE	PTFE

Main Connection Dimensions

PN	DN	L	D	D1	D2	n–Φd	b	f	H	H₀	A	B	Weight (kg)
1.6 MPa	50	108	165	125	99	4–18	20	2	170	130	45	120	7
	65	112	185	145	118	4–18	20	2	170	145	45	120	9.2
	80	114	200	160	132	8–18	20	2	230	152	45	120	11.6
	100	127	220	180	156	8–18	22	2	320	192	45	120	14
	125	140	250	210	184	8–18	22	2	345	200	45	120	18
	150	140	285	240	211	8–22	24	2	385	230	66	150	23
	200	152	340	295	266	12–22	24	2	471	297	85	170	44
	250	165	405	355	319	12–26	26	2	533	327	85	170	64
	300	178	460	410	370	12–26	28	2	694	364	106	205	105
	350	190	520	470	429	16–26	30	2	606	404	106	205	134
	400	216	580	525	480	16–30	32	2	757	444	130	240	181
	450	222	640	585	548	20–30	40	2	814	472	155	240	237
	500	229	715	650	609	20–33	44	2	902	522	169	306	292
	600	267	840	770	720	20–36	54	2	1048	590	198	324	421
	700	292	910	840	794	24–36	40	5	1277	810	220	335	541
	800	318	1025	950	901	24–39	42	5	1385	844	241	356	658
	900	330	1125	1050	1001	28–39	44	5	1490	890	241	356	790
	1000	410	1225	1170	1112	28–42	46	5	1620	950	241	356	890

PN	DN	L	D	D1	D2	n–Φd	b	f	H	H₀	A	B	Weight (kg)
2.5 MPa	50	108	165	125	99	4–18	20	2	170	130	45	120	13
	65	112	185	145	118	8–18	22	2	265	210	35	90	15
	80	114	200	160	132	8–18	24	2	310	233	35	90	19
	100	127	235	190	156	8–22	24	2	343	242	45	120	23
	125	140	270	220	184	8–26	26	2	385	254	45	120	46
	150	140	300	250	211	8–26	28	2	445	580	66	150	66
	200	152	360	310	274	12–26	30	2	510	297	85	170	107
	250	165	425	370	330	12–30	32	2	569	339	85	170	136
	300	178	485	430	389	16–30	34	2	653	375	106	205	185
	350	190	555	490	448	16–33	38	2	730	420	106	205	240
	400	216	620	560	503	16–36	40	2	810	463	130	240	294
	450	222	670	600	548	20–36	46	2	850	495	155	240	423
	500	229	730	660	609	20–36	48	2	940	566	169	306	546
	600	267	845	770	720	20–39	58	2	1150	630	198	324	660
	700	292	960	875	824	24–42	50	5	1195	727	220	335	795
	800	318	1085	990	609	20–36	54	5	1268	810	45	356	894

PN	DN	L	D	D1	D2	n–Φd	b	f	H	H₀	A	B	Weight (kg)
4.0 MPa	50	108	165	125	99	4–18	20	2	170	130	35	120	13
	65	112	185	145	118	8–18	22	2	265	210	35	90	15
	80	114	200	160	132	8–18	20	2	310	233	35	90	19
	100	127	235	190	156	8–22	24	2	343	242	45	120	25
	125	140	270	220	184	8–26	26	2	385	254	45	120	46
	150	140	300	250	211	8–26	28	2	445	280	66	150	67
	200	152	375	320	284	12–30	34	2	510	297	85	170	109
	250	165	450	385	345	12–33	38	2	569	339	85	170	138
	300	178	515	450	409	16–33	42	2	653	375	106	205	186
	350	190	580	510	465	16–36	46	2	730	420	106	205	241
	400	216	660	585	533	16–39	50	2	810	463	130	240	295
	450	222	685	610	560	20–39	57	2	850	495	155	240	424
	500	229	755	670	615	20–42	57	2	940	566	169	306	547
	600	267	890	795	735	20–48	72	2	1150	630	198	324	662
	700	292	995	875	835	24–54	68	5	1195	727	220	335	797
	800	318	1035	1030	960	24–58	76	5	1268	810	241	356	898

Specification Applications

Industries

Oil & Gas: Ideal for controlling flow in high-pressure pipelines carrying oil, gas, and other hydrocarbons.
Petrochemical Plants: Provides reliable sealing and control in pipelines with aggressive chemicals and high temperatures.
Power Generation: Used in steam and water systems within power plants to handle high pressures and temperatures.
Refineries: Controls flow in refining processes where durability and precision are crucial.
Marine & Offshore: Suitable for seawater and other demanding applications in shipbuilding and offshore drilling.

Valve Actuation

Process Optimization

Precision Engineering

Pipeline Solutions

Industrial Valves

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