Wafer butterfly valve - Butterfly Valve

Wafer style butterfly valve

Wafer butterfly valves serve as the ideal solution for fluid control operations including throttling and shut off applications across all applications. The lightweight compact wafer type butterfly valve features two-piece body construction which enables easy interchangeability with other valve types through minimal rework. The unique design features a double-latched seal which allows very high flow rates and minimal pressure loss while also providing excellent sealing performance. The disc connects to a stem on one side and rotates around its axis to enable exact control of the flow rate. The wafer type butterfly valve manufacturers produce products in sizes ranging from 2inch to 60 inch including 3 inch, 4 inch, 5 inch, 6 inch, 8 inch and wafer valve. The wafer style butterfly valve demonstrates high reliability along with low maintenance requirements which makes it a cost-effective alternative to other available valve types. A quality wafer valve investment provides the most enduring solution for your system needs whether you require pressure regulation or fluid flow shutdown.

Application of wafer butterfly valve

Our wafer butterfly valves serve applications across multiple industries which each require distinct operational standards and regulatory compliance. These precision-engineered valves function as essential components in systems that require precise flow control,

HVAC Systems: Leveraging advanced sealing technologies and robust construction
Water Treatment: Our butterfly valves function as essential components in water treatment and distribution systems to control flow rates and pressures.
Marine: The marine industry depends on our wafer butterfly valves because they use corrosion-resistant materials and have versatile designs to control flow in ballast water systems and EGCS.
Chemical Processing: The ptfe butterfly valve provides leak-proof and corrosion-resistant flow control solutions that meet the chemical industry's requirements for handling aggressive substances and different temperatures
Petroleum Refining: The petroleum sector depends on our wafer butterfly valves to operate its complex pipeline and processing unit networks because they provide exceptional durability and control for oil and gas transfer and refining processes and storage operations.
Power Plants: The High performance butterfly valve serves power generation facilities by controlling steam and water and other fluid flows to maintain continuous power supply and safe operation in cooling systems.
Food & Beverage Industry: The Sanitary butterfly valve range is designed to meet the highest standards of hygiene and safety which are required for the food and beverage industry, providing precise control and contamination-free handling of liquids and semi-solids.
Paper Manufacturing: Our valves in the paper production industry enable efficient water, pulp, and chemical management to support the complex paper manufacturing processes through solutions that focus on durability and precision.

What are the flange standards for butterfly valves?

- ANSI Class 125 B16.1
- ANSI Class 150 B16.5,B16.47
- EN PN6 1092-1.1092-2
- EN PN10 1092-1,1092-2
- EN PN16 1092-1,1092-2
- JIS 5K B2211
- JIS 10K B2212
- JIS 16K B2213

PN10 PN16 valve flange size

NPS	DN	OD	PCB	Bolt	n-bolt
3/8	DN10	90	60	14	4
1/2	DN15	95	65	14	4
3/4	DN20	105	75	14	4
1	DN25	115	85	14	4
11/4	DN32	140	100	18	4
11/2	DN40	150	110	18	4
2	DN50	165	125	18	4
21/2	DN65	185	145	18	8
3	DN80	200	160	18	8
4	DN100	220	180	18	8
5	DN125	250	210	18	8
6	DN150	285	240	22	8
8	DN200	340	295	22	8
10	DN250	395	350	22	12
12	DN300	445	400	22	12
14	DN350	505	460	22	16
16	DN400	565	515	26	16
18	DN450	615	565	26	20
20	DN500	670	620	26	20
24	DN600	780	725	30	20
28	DN700	895	840	30	24
32	DN800	1015	950	33	24
36	DN900	1115	1050	33	28
40	DN1000	1230	1160	36	28
48	DN1200	1455	1380	39	32
56	DN1400	1675	1590	42	36
64	DN1600	1915	1820	48	40
72	DN1800	2115	2020	48	44
80	DN2000	2325	2230	48	48

NPS	DN	OD	PCB	Bolt	n-bolt
3/8	DN10	90	60	14	4
1/2	DN15	95	65	14	4
3/4	DN20	105	75	14	4
1	DN25	115	85	14	4
11/4	DN32	140	100	18	4
11/2	DN40	150	110	18	4
2	DN50	165	125	18	4
21/2	DN65	185	145	18	8
3	DN80	200	160	18	8
4	DN100	220	180	18	8
5	DN125	250	210	18	8
6	DN150	285	240	22	8
8	DN200	340	295	22	12
10	DN250	405	355	26	12
12	DN300	460	410	26	12
14	DN350	520	470	26	16
16	DN400	580	525	30	16
18	DN450	640	585	30	20
20	DN500	715	650	33	20
24	DN600	840	770	36	20
28	DN700	910	840	36	24
32	DN800	1025	950	39	24
36	DN900	1125	1050	39	28
40	DN1000	1255	1170	42	28
48	DN1200	1485	1390	48	32
56	DN1400	1685	1590	48	36
64	DN1600	1930	1820	56	40
72	DN1800	2130	2020	56	44
80	DN2000	2345	2230	62	48

ASME ANSI CLASS 150LB flange size

NPS	DN	OD	PCB	Bolt	n-bolt
1/2	DN15	89	60.5	16	4
3/4	DN20	99	69.8	16	4
1	DN25	108	79.2	16	4
11/4	DN32	117	88.9	16	4
11/2	DN40	127	98.6	16	4
2	DN50	152	120.6	19	4
21/2	DN65	178	139.7	19	4
3	DN80	190	152.4	19	4
31/2	(DN90)	216	177.8	19	8
4	DN100	229	190.5	19	8
5	DN125	254	215.9	22.5	8
6	DN150	279	241.3	22.5	8
8	DN200	343	298.4	22.5	8
10	DN250	406	362	25.5	12
12	DN300	483	431.8	25.5	12
14	DN350	533	476.2	28.5	12
16	DN400	597	539.8	28.5	16
18	DN450	635	577.8	32	16
20	DN500	693	635	32	20
22	(DN550)	749	692.2	35	20
24	DN600	813	749.3	35	20

JIS 10k butterfly valve flange size

NPS	DN	OD	PCB	Bolt	n-bolt
3/8	DN10	90	65	15	4
1/2	DN15	95	70	15	4
3/4	DN20	100	75	15	4
1	DN25	125	90	19	4
11/4	DN32	135	100	19	4
11/2	DN40	140	105	19	4
2	DN50	155	120	19	4
21/2	DN65	175	140	19	4
3	DN80	185	150	19	8
31/2	(DN90)	195	160	19	8
4	DN100	210	175	19	8
5	DN125	250	210	23	8
6	DN150	280	240	23	8
7	(DN175)	305	265	23	12
8	DN200	330	290	23	12
9	(DN225)	350	310	23	12
10	DN250	400	355	25	12
12	DN300	445	400	25	16
14	DN350	490	445	25	16
16	DN400	560	510	27	16
18	DN450	620	565	27	20
20	DN500	675	620	27	20
22	(DN550)	745	680	33	20
24	DN600	795	730	33	24
26	(DN650)	845	780	33	24
28	DN700	905	840	33	24
30	(DN750)	970	900	33	24
32	DN800	1020	950	33	28
34	(DN850)	1070	1000	33	28
36	DN900	1120	1050	33	28
40	DN1000	1235	1160	39	28
44	DN1100	1345	1270	39	28
48	DN1200	1465	1380	39	32

What parameters need to be provided to buy a butterfly valve？

Several essential parameters need to be considered when purchasing a wafer butterfly valve. The initial consideration should be the valve size. The application requirements will determine the necessary size of the valve. The valve size affects both its weight and installation process and determines the amount of flow that can pass through it.

The torque rating of a butterfly valve represents its second essential parameter because it shows the maximum pressure level the valve can withstand before it fails or gets damaged. The torque rating of butterfly valves is expressed in Newton-metres (Nm) so you need to determine the exact torque requirements of your application before making a purchase.

The selection of materials for construction determines the strength and durability and corrosion resistance of the butterfly valve so stainless steel butterfly valves remain popular because they outlast plastic butterfly valves in demanding conditions. The selection of a butterfly valve requires consideration of operational temperature ranges because extreme temperatures need specialized materials to achieve maximum performance and extended lifespan.

Which is better wafer or lugged butterfly valve?

The selection of any valve for a particular application requires evaluation of system size requirements and pressure ratings. Wafer butterfly valves serve applications that need reduced weight and cost but lugged butterfly valves offer better structural strength. The main distinction between wafer and lugged butterfly valves exists in their bolt attachment systems because lugged designs use two sets of bolts to connect valve body to companion flanges but wafer designs use one set of bolts on each side.

What is a wafer type butterfly valve installed?

A wafer type butterfly valve is a quarter turn rotary valve that is typically used to control and isolate mediums such as air, gas, steam, water, oil and other liquids. It consists of a circular disc mounted onto a shaft which is in the centre of the body. The disc can rotate 90 degrees from open to closed positions depending on the direction of flow.

Wafer type butterfly valves are installed between two flanged pipe fittings by bolting it directly into them using four stud bolts or lag screws in accordance with ANSI/ASME B16.5 standards for pipe flanges and standard pressure ratinigs (ANSI Class 150/300). In order to achieve a leak-proof seal between the mating flanges, two flat gaskets are inserted between them which must be rated for pressures above those expected in operation.