Worm Gear Triple Offset Butterfly Valve

Size Range:DN50-DN800

Material: Carbon Steel, Stainless Steel

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 Triple Offset Butterfly Valve is a high-performance valve designed for applications requiring tight shutoff, durability, and efficient flow control. Its triple-offset design minimizes wear, ensures reliable sealing, and reduces torque requirements, making it ideal for high-temperature and high-pressure environments. The worm gear mechanism provides precise manual control, allowing for smooth, incremental adjustments. Constructed with durable materials, this valve is suited for industrial sectors such as oil & gas, chemical processing, and power generation, where safety and efficiency are paramount.

Product Features

Quick Operation: Butterfly valves can be opened or closed quickly, often using a lever or actuator, allowing efficient flow control. This is particularly beneficial in industries like HVAC systems, fire protection systems, and chemical processing, where rapid flow adjustments are essential.

Low-Pressure Drop: The streamlined disc design ensures minimal resistance to flow, reducing pressure drop across the valve.

Compact and Lightweight: Butterfly valves are smaller and lighter compared to other types of valves, making them easy to install and maintain.

Versatile Connection Options: Available in wafer, lug, flanged, double flanged, and grooved connections to accommodate a wide range of piping configurations.

Resilient or Metal Seat Options: Offers both soft seats (e.g., EPDM, PTFE) for low-pressure applications and metal seats for higher temperatures and pressures.

Manual or Actuated Operation: Can be operated manually using a lever or automated with electric, pneumatic, or hydraulic actuators.

Specification Parameters

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

Oil & Gas Industry: Used in pipelines, refineries, and offshore platforms for controlling flow in high-pressure and high-temperature environments.
Chemical Processing: Ideal for handling corrosive and hazardous fluids, providing tight sealing and protection against leakage.
Power Generation: Employed in power plants for steam, gas, and water control, especially in high-temperature and high-pressure systems.
Water Treatment: Applied in desalination plants and wastewater treatment facilities where reliable sealing is essential for preventing contamination.
Petrochemical Industry: Used for isolating and controlling various hydrocarbons in processing and storage.
Marine and Shipbuilding: Installed in ballast and bilge systems, seawater intake, and cooling systems for corrosion-resistant and durable performance.
Pulp and Paper: Effective in managing slurry and pulp flows where sealing integrity is critical due to abrasive particles.

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