Pneumatic High Performance Double Eccentric Butterfly Valve

Heyue pneumatic high performance double eccentric butterfly valve is engineered to deliver unmatched performance in various operating conditions. Its double eccentric design allows for a smooth and precise flow control, minimizing pressure drop and ensuring optimal system efficiency. The valve's high-performance capabilities make it suitable for both high-pressure and high-temperature applications, providing reliable and accurate control over the fluid flow.

 

One of the standout features of this valve is its ability to provide precise flow control. The double eccentric design, combined with pneumatic actuation, allows for accurate modulation of flow rates. This level of control ensures optimal process performance and enables operators to fine-tune the flow according to specific requirements. Whether it's throttling or on/off applications, this valve delivers exceptional control accuracy, contributing to overall system efficiency and productivity.

 

Enhanced Reliability

Reliability is paramount in industrial applications, and the pneumatic high-performance double eccentric butterfly valve excels in this aspect. Its robust construction and high-quality materials ensure long-term durability, even in harsh operating conditions. The valve is designed to resist corrosion, erosion, and wear, extending its service life and minimizing maintenance requirements. With its reliable performance, operators can have confidence in the valve's ability to withstand demanding environments and deliver consistent results.

 

Efficient and Economical

Efficiency and cost-effectiveness are essential considerations in any industrial process. The pneumatic high-performance double eccentric butterfly valve offers significant advantages in both these areas. Its streamlined design and low-pressure drop characteristics result in energy savings, reducing operational costs over the valve's lifespan. Additionally, the valve's reliable performance and minimal maintenance requirements contribute to overall cost reduction, making it a cost-effective choice for businesses.

 

I. Core Industrial Application Fields

Water Treatment and Municipal Engineering

Water intake and discharge control in water treatment plants, wastewater treatment (aeration, sedimentation, filtration processes), reclaimed water reuse, pump station isolation.

Cost-effective for large diameters, reliable sealing, resistant to media with minor particulate matter, pneumatic drive facilitates remote centralized control.

 

HVAC and District Energy

District cooling and heating networks, large building hot and cold water circulation systems, cooling tower water intake and discharge, heat exchange stations.

Excellent regulating performance, precise control of water flow and temperature, rubber seats (such as EPDM) have good adaptability to hot water, and are key components for achieving energy-saving automation.

 

General Industry and Manufacturing

Factory circulating cooling water systems, compressed air pipelines, process water, low-pressure steam systems, flue gas treatment (pre-treatment for desulfurization and denitrification).

Suitable for various media such as water, gas, and oil, wide temperature range (depending on seat material, usually -40°C to 200°C), high reliability, reducing unplanned downtime.

 

Power Industry (Auxiliary Systems)

Power plant closed/open cooling water systems, demineralized water systems, ash handling systems, auxiliary steam pipelines.

Replaces traditional gate valves, easier and faster operation, easy to implement pneumatic automation, reducing the labor intensity of operating personnel.

 

Ships and Offshore Platforms

Ship ballast water systems, fire fighting water systems, seawater cooling pipelines, daily freshwater systems.

Compact structure saves space, resistant to seawater corrosion (valve bodies often use 316 stainless steel or special coatings), pneumatic actuation is suitable for remote operation from the ship's control room.

 

II. Key Operating Conditions and Selection Characteristics

Medium Temperature and Pressure Conditions

Typical Media: Hot water, saturated steam (generally ≤200°C, PN16/25), oils, general chemical media.

This is its most typical application range, with performance far superior to centerline butterfly valves, and is a preferred energy-saving automation solution to replace traditional globe and gate valves.

 

Situations requiring reliable bidirectional or unidirectional shut-off

Pump outlet isolation, pipeline switching, equipment inlet/outlet control. Description: The high-performance multi-layer seat design provides bidirectional bubble-tight sealing, meeting stringent process isolation requirements and ensuring system safety.

 

Large Diameter Flow Control

Main water supply pipeline pressure/flow control, ventilation system airflow regulation, process parameter stabilization.

When paired with pneumatic electronic or intelligent positioners, it can achieve high-precision linear or equal percentage flow characteristic adjustment, making it an ideal actuator for process automation.

 

Safety or Process Interlocks Requiring Fast Opening and Closing

Safety interlocks (not the highest level ESD), batch processing, sequential control.

Pneumatic actuators (especially double-acting types) can provide opening and closing speeds in seconds, quickly responding to control system commands.

 

III. Comparison and Selection Key Points

Compared with triple-offset butterfly valves, the core difference of double-offset butterfly valves lies in the sealing pair:

Double-offset: Primarily relies on the deformation of the elastic valve seat for sealing. Advantages include good elasticity, high sealing level (up to zero leakage), and strong compensation ability for microscopic unevenness. Disadvantages include temperature limitations due to the valve seat material (usually ≤200-250°C), making it unsuitable for extremely high temperatures or severe wear/erosion conditions.

Triple-offset: Uses metal-to-metal conical hard sealing. Advantages include high temperature and pressure resistance (up to 600°C and above), erosion resistance, and fire resistance. Disadvantages include higher cost, extremely high manufacturing precision requirements, and potentially higher closing torque required to achieve zero leakage at room temperature.

 

D372F High Performance Double Offset Wafer Butterfly Valve(ANSI CLASS 150)
VALVE SIZE		WAFER H (mm)	H0 (mm)	L (mm)	F (mm)	Z×Z (H×G)	M+N (16+N)	P (mm)	ISO5211	S
mm	ins
50	2"	258	193	43	20	11×11	16×4	120.7	F07	4×Ø10
65	2.5"	262	193	46	20	11×11	16×4	130.7	F07	4×Ø10
80	3"	294	218	49	20	11×11	16×4	152.4	F07	4×Ø10
100	4"	338	239	52	20	14×14	16×8	190.5	F07	4×Ø10
125	5"	377	263	56	25	17×17	20×8	215.9	F10	4×Ø12
150	6"	402	277	61	25	17×17	20×8	241.3	F10	4×Ø12
200	8"	469	317	64	25	17×17	20×8	281.45	F10	4×Ø12
250	10"	535	348	71	32	22×22	24×12	366.95	F12	4×Ø16
300	12"	625	400	82	45	27×27	24×12	431.8	F12	4×Ø16
350	14"	698	417	92	45	27×27	27×12	476.25	F14	4×Ø18
400	16"	798	476	102	45	27×27	30×16	539.75	F16	4×Ø22
450	18"	864	564	114	50	36×36	30×16	599.85	F16	4×Ø22
500	20"	945	592	127	50	36×36	30×20	693.8	F16	4×Ø22
600	24"	1074	678	154	65	36×36	33×20	749.3	F16	4×Ø22
650	26"	1170	708	165	65	46×46	33×24	806.45	F16	4×Ø22
700	28"	1322	738	165	65	46×46	32×28	863.6	F16	4×Ø22
750	30"	1302	773	191	100	22×80	33×28	914.4	F16	4×Ø22
800	32"	1357	796	191	100	22×80	39×28	977.9	F25	8×Ø18
850	34"	1444	856	197	100	22×80	39×28	1028.7	F25	8×Ø18
900	36"	1500	925	210	100	22×80	39×32	1085.85	F30	8×Ø22
1000	40"	1634	953	241	110	25×105	39×36	1200.15	F30	8×Ø22
1050	42"	1690	979	241	110	25×105	39×36	1257.3	F30	8×Ø22
1200	48"	1897	1102	254	120	32×115	39×44	1422.4	F30	8×Ø22
1350	54"	2100	1209	273	130	36×140	45×44	1593.85	F35	8×Ø33

D342F High Performance Double Offset Flanged Butterfly Valve
(1)ANSI CLASS 150
VALVE SIZE		H (mm)	H0 (mm)	L (Short, mm)	F (mm)	Z×Z (H×G)	ISO5211	S
mm	ins
80	3"	323	228	114	20	11×11	F07	4*10
100	4"	372	258	127	20	14×14	F07	4*10
125	5"	404	277	140	20	17×17	F10	4*12
150	6"	431	291	140	20	17×17	F10	4*12
200	8"	504	332.5	152	25	17×17	F10	4*12
250	10"	551	348	165	25	22×22	F12	4*14
300	12"	642	400	178	25	27×27	F12	4*14
350	14"	738	461	190	32	27×27	F14	4*18
400	16"	771	473	216	45	27×27	F16	4*22
450	18"	906	588	222	45	36×36	F16	4*22
500	20"	967	618	229	45	36×36	F16	4*22
600	24"	1097	691	267	50	46×46	F16	4*22
750	30"	1293	801	318	50	80×22	F16	4*22
900	36"	1509	925	330	65	80×22	F30	8*22
(2)ANSI CLASS 300
VALVE SIZE		A (mm)	B (mm)	L (mm)	F (mm)	Z×Z (H×G)	R	S
mm	ins
80	3"	323	228	180	20	14×14	F07	4*10
100	4"	385	258	190	25	17×17	F07	4*10
125	5"	418	277	200	25	17×17	F10	4*12
150	6"	453	295	210	25	17×17	F10	4*12
200	8"	520	330	230	32	22×22	F10	4*12
250	10"	583	361	250	45	27×27	F12	4*16
300	12"	694	433	270	45	27×27	F12	4*16
350	14"	759	467	290	45	27×27	F14	4*18
400	16"	910	586	310	50	36×36	F16	4*22
450	18"	981	626	330	50	36×36	F16	4*22
500	20"	1349	674	350	50	36×36	F16	4*22
600	24"	1238	780	390	65	46×46	F16	4*22

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