Flange butterfly valve

A flanged butterfly valve is a valve with flanges at the inlet and outlets sides. The flanges have holes used to secure bolts when connecting the valve to the pipe. A gasket is placed between the valve and pipe to enhance a tight seal.These valves operate by turning the disc for a quarter turn to start and stop fluid flow. The operation of the valve can be manual or it can be done using valve actuators. Butterfly valve flange types are stronger when compared to other types of butterfly valves.

The range of WESDOM valves can be used for overground installation, in valve chambers and buried systems.

 

Advantages of flanged butterfly valves :

①These valves can be operated manually or automatically.

②Butterfly valve flange types are small in size and light in weight compared to gate valve, check valve and globe valve.

③They are of compact and simple design.

④These valves can be used in both high-pressure and high-temperature applications depending on the valve seat material.

⑤Flanged butterfly valves are free from fluid leakage.

⑥They can be installed where space is limited, unlike other large-sized valves.

⑦These valves are used in shut-off and throttling fluid flow applications.

⑧These valves operate by making a quarter turn which makes their operations very fast.

⑨Flanged butterfly valves are easy to install, clean, and repair.

 

Troubleshooting flanged butterfly valves:

1)Valve is hard to operate

①Clogged materials inside the valve. Open the valve and remove such materials.

②Corroded internal parts. Open the valve and clean off any corrosion.

2）Internal fluid leakage

①Damaged seats. Replace the valve seats.

②Worn out O-rings. Replace the O-rings.

③Dirt in the valve. Open the valve and clean the dirt.

3）External fluid leakage

①High fluid pressure. Ensure the valve is working at the pressure level recommended by the flange butterfly valve manufacturer.

②Loose bolts. Tighten the bolts to the torque required by the flanged butterfly valve manufacturer.

③Worn out gasket. Replace the gasket.

④Worn out packing. Replace the packing.

 

Test/Approvals:

(1)Tested according to EN 12266.

(2)WRAS approved materials

 

Standards:

(1)EN 593

(2)Face-to-face dimension according to EN 558 Table 2 Basic Series 13

(3)Flange drilling to EN1092, PN10/16

NO.	Part name	Material
1	Body	ASTM A536 65-45-12, WCB, CF8M Bonded with NBR or EPDM
2	Disc	ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, 1.4462
3	Stem	SS420,SS431
4	Screw	SS304
5	Retainer	SS201
6	Weather seal	NBR
7	Bearing	RPTFE with Graphite on I.D.
8	Lower Stem	SS420, SS431
9	Bottom cover	Same as body
10	Bolt	SS304
11	Screw	SS304

 

DN	L	L1	D		D1		D3	D4	H1	H2	H3	b	Z-ød
			PN10	PN16	PN10	PN16							PN10	PN16
50	108	160	165	1665	125	125	70	50	83	130	60	18	4–18	4–18
65	112	160	186	185	145	145	70	50	93	140	60	18	4–18	4–18
80	114	160	200	200	160	160	70	50	100	150	60	20	8–18	8–18
100	127	160	220	220	180	180	90	70	110	165	60	20	8–18	8–18
125	140	160	250	250	210	210	90	70	123	180	60	22	8–18	8–18
150	140	160	285	285	240	240	90	70	143	200	60	22	8–22	8–22
200	152	210	340	340	295	295	125	125	171	230	72	24	8–22	12–22
50	165	210	390	405	350	355	125	125	203	270	72	24	12–22	12–26
300	178	210	440	460	400	410	150	140	230	320	75	26	12–22	12–26
350	190	210	50	520	460	470	150	140	260	350	75	26	16–22	16–26
400	216	320	565	580	515	525	175	165	300	390	126	28	16–26	16–30
450	222	320	615	640	565	585	175	165	335	428	126	30	20–26	20–30
500	229	320	670	715	620	650	210	254	373	450	126	32	20–26	20–33
600	267	340	780	840	725	770	210	254	430	520	127	34	20–30	20–36
700	292	380	895	910	840	840	300	254	470	600	167	36	24–30	24–36
800	318	380	1015	1025	950	950	300	254	523	662	167	36	24–30	24–39
900	330	400	1115	1125	1050	1050	300	254	589	710	193	40	28–33	28–39
1000	410	400	1230	1255	116	1170	300	254	656	780	193	42	28–36	28–42
1200	471	440	1405	1485	1340	1390	300	254	732	840	205	46	32–37	32–49
1400	530	440	1630	1685	1560	1590	300	254	840	905	212	50	36–37	36–49

 

Project Name: Pakistan Sewage Treatment Plant Project

Customer name: a customer in Pakistan

Products to Buy: Flanged Butterfly Valves and Gate Valves

Customer demand: the use of sewage treatment plant projects

Engineering Content:

This case is an old customer from Pakistan. Because he has purchased valve products from WESDOM many times, he has very high trust and evaluation on WESDOM. He needs a lot of butterfly valves and gate valve products in the sewage treatment plant project which he is responsible for. They sent the requirements to the businessman of WESDOM’s international trade department without hesitation. Of course, WESDOM still returns this old customer in Pakistan with high-quality products and preferential prices;

After that, the customer also sent us the installation pictures of the WESDOM product in the working condition project, and feedback that the quality is still very good, and will maintain a long-term cooperative relationship with WESDOM;

Project pictures:

 

①Flanged butterfly valves are used in steam power plants.

②They are used in mining.

③Butterfly valves flange type is used in food and beverage processing plants because they are easy to clean.

④These valves are also used in the manufacturing of pharmaceutical products since they can be cleaned to enhance high levels of hygiene.

⑤They are used in municipal water supply and wastewater treatment.

⑥They are used in fire protection.

⑦They are used in the manufacturing of paper and pulp.

⑧They are used in the refinery of petroleum products.

⑨Butterfly valve flange type is used in the manufacturing of different chemicals.

⑩SS butterfly valves are used in HVAC systems.