Flanged PTFE-lined butterfly valve

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Flanged PTFE-lined butterfly valve

Size Range: DN40–DN1200
Pressure Range: PN6–PN25
End Connection: Flanged / Wafer / Lug
Material: Ductile Iron / Carbon Steel Body with PTFE Lining
Seals: PTFE/FEP
Valves Design: Fluorine-Lined Centered or Eccentric Butterfly Valve
Face to Face: ISO 5752 / API 609
End Connection: ASME B16.5, EN 1092-1
Testing & Inspection: API 598, ISO 5208
Suitable Medium: Strong Acids, Alkalis, and Corrosive Media

Product Overview

The Flanged PTFE-lined butterfly valve is a corrosion-resistant flow control solution designed for highly aggressive media such as acids, alkalis, and chemical mixtures. Featuring a PTFE-lined body and disc, this midline type valve ensures excellent sealing, low torque operation, and extended service life in demanding environments. Available in pressure ratings from PN0.6MPa to PN2.5MPa and sizes DN40–DN1200, it is ideal for chemical processing, wastewater treatment, and industrial pipeline systems requiring reliable, non-metallic sealing surfaces. Its flanged connection design allows easy installation and secure pipeline integration.

Product Features

Material Configuration Table for Butterfly Valve Components

Serial No.	Part Name	Grey cast iron	Carbon Steel	Stainless Steel		Low carbon stainless steel
Serial No.	Part Name	Z	C	P	R	PL	RL
1	Upper and lower body	HT250	WCB	CF8	CF8M	CF3	CF3M
2	Butterfly Plates	1Cr13	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti	00Cr18Ni10	00Cr18Ni14Mo2
3	Lining layer / Seat	PTFE (F4), PCTFE (F3), FEP (F46), PFA (Melt-processable F4), PO (Polyolefin)
4	Disc / Packing gland	WCB	WCB	CF8	CF8M	CF3	CF3M
5	Support	WCB (Carbon Steel)			CF8 (Stainless Steel)
6	Filler	PTFE (F4)
7	Bolt	35CrMo	35CrMo	1Cr17Ni2	1Cr17Ni2	1Cr18Ni9Ti	1Cr18Ni9Ti
8	Nut	45	45	0Cr18Ni9	0Cr18Ni9	0Cr18Ni9	0Cr18Ni9

Specification Parameters

Main Connection Dimensions and Weight

DN (mm)	NPS (inch)	L	D	D1	D2	f	b	P=0.6MPa	D0	H	Weight (kg)
40	1 1/2	106	130	100	80	3	16	4–φ14	160	140	10
50	2	108	140	110	90	3	16	4–φ14	200	160	12
65	2 1/2	112	160	130	110	3	16	4–φ14	250	160	13
80	3	114	185	150	125	3	18	4–φ18	250	170	14
100	4	127	205	170	145	3	18	4–φ18	250	180	16
125	5	140	235	200	175	3	20	8–φ18	300	275	18
150	6	140	260	225	200	3	20	8–φ18	300	295	38
200	8	152	315	280	255	3	22	8–φ18	320*	320	74
250	10	250	370	335	310	3	24	12–φ18	385	385	105
300	12	270	435	395	362	4	24	12–φ23	240*	390	142
350	14	290	485	445	412	4	26	12–φ23	240*	460	179
400	16	310	535	495	462	4	28	16–φ23	280*	510	220
450	18	330	590	550	518	4	28	16–φ23	280*	540	268
500	20	350	640	600	568	4	30	16–φ25	320*	570	378
600	24	390	755	705	670	5	30	20–φ25	320*	660	608
700	28	430	860	810	775	5	32	24–φ25	360*	710	1050
800	32	470	975	920	880	5	34	24–φ30	360*	780	1320
900	36	510	1075	1020	980	5	36	24–φ30	380*	885	1795
1000	40	550	1175	1120	1080	5	36	28–φ30	400*	990	1900
1200	48	630	1400	1340	1295	5	40	32–φ34	400*	1170	2110

PN1.0MPa Dimensions

DN (mm)	NPS (inch)	L	D	D1	D2	f	b	Z–φd	D0	H	Weight (kg)
40	1 1/2	106	145	110	85	3	18	4–φ18	160	140	10
50	2	108	160	125	100	3	20	4–φ18	200	160	12
65	2 1/2	112	180	145	120	3	20	4–φ18	250	165	13
80	3	114	195	160	135	3	22	8–φ18	250	170	14
100	4	127	215	180	155	3	22	8–φ18	250	180	16
125	5	140	245	210	185	3	24	8–φ23	300	275	18
150	6	140	280	240	210	3	24	8–φ23	300	295	38
200	8	152	335	295	265	3	26	8–φ23	320*	320	74
250	10	250	390	350	320	3	28	12–φ25	385	385	105
300	12	270	440	400	368	4	28	12–φ23	240*	390	142
350	14	290	505	460	428	4	30	12–φ23	240*	460	179
400	16	310	565	515	482	4	32	16–φ23	280*	510	220
450	18	330	615	565	532	4	32	16–φ25	280*	540	268
500	20	350	670	620	585	4	36	20–φ25	320*	570	378
600	24	390	780	725	685	5	36	20–φ30	660	608	608
700	28	430	895	840	800	5	40	24–φ30	710	1050	1050
800	32	470	1010	950	905	5	44	24–φ30	780	1320	1320
900	36	510	1120	1050	1005	5	46	24–φ34	885	1795	1795
1000	40	550	1220	1160	1105	5	50	28–φ34	990	1900	1900
1200	48	630	1450	1380	1325	5	56	32–φ41	1200	2150	2150

PN1.6MPa

DN (mm)	NPS (inch)	L	D	D1	D2	f	b	Z–φd	D0	H	Weight (kg)
40	1 1/2	106	145	110	85	3	18	4–φ18	160	140	10
50	2	108	160	125	100	3	20	4–φ18	200	160	12
65	2 1/2	112	180	145	120	3	20	4–φ18	250	160	13
80	3	114	195	160	135	3	22	8–φ18	260	170	14
100	4	127	215	180	155	3	24	8–φ18	300	180	16
125	5	140	245	210	185	3	26	8–φ18	300	275	18
150	6	140	280	240	210	3	28	8–φ23	200*	295	42
200	8	152	335	295	265	3	30	12–φ23	200*	320	78
250	10	250	405	355	320	3	32	12–φ25	240*	385	120
300	12	270	460	410	375	4	34	12–φ25	240*	390	145
350	14	290	520	470	435	4	38	16–φ25	240*	460	202
400	16	310	580	525	485	4	40	16–φ30	280*	510	235
450	18	330	640	585	545	4	44	20–φ30	320*	540	368
500	20	350	705	650	608	4	44	20–φ34	320*	570	420
600	24	390	840	770	718	5	48	24–φ34	320*	660	750
700	28	430	910	840	788	5	54	24–φ41	360*	710	1028
800	32	470	1020	950	898	5	54	24–φ41	380*	780	1690
900	36	510	1120	1050	998	5	54	28–φ41	380*	885	1815
1000	40	550	1255	1170	1110	5	60	28–φ48	500*	990	2050

PN2.5MPa

DN (mm)	NPS (inch)	L	D	D1	D2	f	B	Z–φd	D0	H	Weight (kg)
40	1 1/2	106	145	110	85	3	20	4–φ18	200	140	11
50	2	108	160	125	100	3	22	4–φ18	200	160	13
65	2 1/2	112	180	145	120	3	24	8–φ18	250	160	14
80	3	114	195	160	135	3	26	8–φ18	250	170	16
100	4	127	215	180	155	3	30	8–φ23	250	180	18
125	5	140	245	210	185	3	32	8–φ25	275	270	21
150	6	140	280	240	210	3	32	8–φ25	240*	295	45
200	8	152	335	295	265	3	36	12–φ25	320*	320	88
250	10	250	405	355	320	3	40	12–φ30	385	385	145
300	12	270	460	410	375	4	42	16–φ30	280*	390	157
350	14	290	520	470	435	4	44	16–φ34	320*	460	212
400	16	310	580	525	485	4	46	16–φ34	320*	510	353
450	18	330	640	585	545	4	52	20–φ34	360*	540	405
500	20	350	705	650	608	4	56	20–φ41	360*	570	465
600	24	390	840	770	718	5	56	24–φ41	380*	660	795

Specification Applications

Chemical Processing: Ideal for acid and alkali pipelines in chemical plants.

Petrochemical Industry: Efficient for corrosive fluid transport.

Pharmaceutical Industry: Ensures contamination-free handling of aggressive chemicals.

Water Treatment Systems: Handles chemicals used in water purification processes.

Valve Actuation

Process Optimization

Precision Engineering

Pipeline Solutions

Industrial Valves

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