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Counterweight Butterfly Valve

FYL is factory located in Tianjin China. Factory specialized in producing different type of valves. Counterweight Butterfly Valve is one of major products. Our products has good quality and price advantage, also company available to make OEM products. Welcome inquiries from all over the world.

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Product Description

A counterweight butterfly valve is a type of valve used to regulate the flow of a fluid (gas or liquid) in a piping system. It is a quarter-turn valve, meaning that rotating the disc 90 degrees can completely open or close the valve. The disc is positioned in the center of the pipe and pivots on an axis, which is perpendicular to the direction of flow. Here are some key features and components of a counterweight butterfly valve:

1. Valve Body: The main structure that houses the internal components and connects to the pipeline.

2. Disc: The movable element that rotates to control the flow of the fluid. When the disc is parallel to the flow, the valve is open; when perpendicular, the valve is closed.

3. Stem: The rod that connects the disc to the actuator or handle, transmitting the rotational force.

4. Seal: Ensures a tight closure to prevent leakage when the valve is closed.

5. Counterweight: Attached to the stem, the counterweight provides balance and assists in returning the valve to a closed or open position automatically. This mechanism can help in situations where quick shut-off is necessary in case of a system failure or to maintain safety.

ApplicationsCounterweight butterfly valves are commonly used in a variety of applications, including:

· Water and wastewater treatment

· Chemical and petrochemical industries

· HVAC systems

· Food and beverage processing

· Power generation

Advantages

· Quick Operation: Due to the quarter-turn mechanism, these valves can be operated quickly.

· Compact Design: Requires less space compared to other types of valves like gate or globe valves.

· Cost-Effective: Generally less expensive and easier to install and maintain.

· Versatility: Suitable for a wide range of fluids, including liquids, gases, and semi-solids.

Disadvantages

· Flow Restriction: The presence of the disc in the flow path can cause a slight pressure drop.

· Limited Throttling: Not ideal for precise flow control compared to other valve types like globe valves.

Summary

Counterweight butterfly valves are essential components in various industrial applications due to their simplicity, reliability, and efficiency. The addition of a counterweight mechanism enhances the operational safety and convenience, making them a preferred choice in many automated and manual systems.

Main Technical Parameter

Nominal Diameter	DN（mm）	50～2000				50～500
Pressure	PN（MPa）	0.6	1.0	1.6	2.5	4.0
Test Pressure	Shell	0.9	1.5	2.4	3.75	6.0
Test Pressure	Seal	0.66	1.1	1.76	2.75	4.4
Temperature	Carbon Steel:-29℃～425℃ Stainless Steel-40℃～600℃
Medium	Air, water, steam, gas, oil, acid, alkali, salt with weak corrosive media, etc.
Operation	Hand wheel, pneumatic, electric, worm gear

Main connection dimensions

Diameter		Main Size				Dandn-Ød
Diameter		Main Size				1.0MPa			1.6MPa			2.5MPa
mm	in	Short L	Long L	H1	H	D	D1	n-Ød	D	D1	n-Ød	D	D1	n-Ød
50	2	108	150	350	112	165	125	4-Ø18	165	125	4-Ø18	165	125	4-Ø18
65	2.5	112	170	370	115	185	145	4-Ø18	185	145	4-Ø19	185	145	8-Ø18
80	3	114	180	380	120	200	160	8-Ø18	200	160	8-Ø19	200	160	8-Ø18
100	4	127	190	420	138	220	180	8-Ø18	220	180	8-Ø19	235	190	8-φ22
125	5	140	200	460	164	250	210	8-Ø18	250	210	8-Ø19	270	220	8-Ø26
150	6	140	210	555	175	285	240	8-Ø22	285	240	8-φ22	300	250	8-Ø26
200	8	152	230	760	200	340	295	8-Ø22	340	295	12-Ø23	360	310	12-Ø26
250	10	165	250	830	243	395	350	12-Ø22	405	355	12-Ø26	425	370	12-Ø30
300	12	178	270	895	250	445	400	12-Ø22	460	410	12-Ø26	485	430	16-Ø30
350	14	190	290	950	280	505	460	16-Ø22	520	470	16-Ø26	555	490	16-Ø33
400	16	216	310	1190	305	565	515	16-Ø26	580	525	16-Ø31	620	550	16-Ø36
450	18	222	330	1255	350	615	565	20-Ø26	640	585	20-Ø31	670	600	20-Ø36
500	20	229	350	1305	380	670	620	20-Ø26	715	650	20-Ø34	730	660	20-Ø36
600	24	267	390	1340	445	780	725	20-Ø30	840	770	20-Ø37	845	770	20-Ø39
700	28	292	430	1520	480	895	840	24-Ø30	910	840	24-Ø37	960	875	24-Ø42
800	32	318	470	1710	530	1015	950	24-Ø33	1025	950	24-Ø41	1085	990	24-Ø48
900	36	330	510	1810	580	1115	1050	32-Ø33	1125	1050	28-Ø41	1185	1090	28-Ø48
1000	40	410	550	1960	650	1230	1160	32-Ø36	1255	1170	28-Ø43	1320	1210	28-Ø56
1200	48	470	630	2250	760	1455	1380	32-Ø39	1485	1390	32-Ø49	1530	1420	32-Ø56
1400	56	530	710	2435	850	1675	1590	36-Ø42	1685	1590	36-Ø49	1755	1640	36-Ø62
1600	64	600	790	2780	1030	1915	1820	40-Ø48	1930	1820	40-Ø56	1975	1860	40-Ø62
1800	72	670	870	3020	1230	2115	2020	44-Ø48	2130	2020	44-Ø56	2195	2070	44-Ø70
2000	80	760	950	3270	1350	2325	2230	48-Ø48	2345	2230	48-Ø62	2425	2300	48-Ø70