FEP Lined Butterfly Valve

FEP lined butterfly valves are butterfly valves that have a layer of FEP (Fluorinated ethylene propylene) material covering the media-contacting parts of the butterfly valve disc and valve body to improve its corrosion resistance and sealing performance.

Our FEP lined butterfly valves provide you with a reliable solution for controlling media flow in environments with corrosive chemicals, high temperatures or abrasives.

We offer FEP lined butterfly valves in a variety of sizes, pressure ratings and configurations to meet your specific application needs. We place great emphasis on product quality, durability and reliability to provide you with the best long-term solution.

Explore our impressive range of FEP lined butterfly valves now!

TOT Valve provides you with a smooth FEP lining surface, which forms an effective barrier between the media and the metal shell, thereby improving corrosion and wear resistance and minimizing deposits and clogging. This can extend the service life of the butterfly valve and minimize potential downtime.

The sizes of FEP butterfly valves we produce are various, ranging from 1-½ inches to 28 inches (DN40-DN700). You can apply FEP butterfly valves to oil, oil and gas, water treatment, wastewater treatment and other industrial applications.

Below we have summarized some data about the specifications, materials, sizes and other aspects of FEP lined butterfly valves for you, hoping to help you choose the right lined butterfly valve.

FEP Lined Butterfly Valve Specifications and Standards

Size	40mm-700mm (1½ ” to 28″)
Working Pressure	0.1mbar-10bar
Temperature Range	-29℃ ~ 260℃ according to working conditions, other temperatures on request.
Design & Manufacture	APl609 DIN EN1092 JIS B2032
Face to Face	ASME B16.10, DIN EN558. 1, JIS B2002
Flange Ends	ASME B16.5 DIN 2532 JIS B2212 （150LB, 10K, PN10）
Visual Inspection	MSS Sp54
Testing	API 598, DIN 3230, JIS B2003
Pressure & Temperature	ASME B16.34
Operator Type	Lever/ Gear/ Pneumatic/ Electric
Spark Testing	14kv

FEP Lined Butterfly Valve Parts

At TOT Valve, FEP lined butterfly valve’s special feature is the valve seat has an independent triangular gasket sealing ring.

Stem Design: Square, Double-0, Single key, Double key

Valve Stem: Equipped with self-lubricating shaft bearing, which can reduce the torque and maintenance without oil filling (in contrast, smaller actuators can be selected to reduce the cost

Gasket: The fourth stage is loaded with elastic gasket, which continuously gives the valve seat pressure to produce the first main seal. After testing, the effect is very stable

V-ring: The second seal, up and down v-rings, cross each other and maintain continuously

Elastic Spacer: Elastomer back-up immersed in body ensures zero leakage between disc and seat.

Body: Two piece body (wafer and lug type)precision casting moulds with clear mark

IS05211 pad universal mounting permits easy automations even with the valves in the pipe line
Integral body locating holes to ensure perfect centering of the valves between flange. Applied to different international standard
Outdoor epoxy baking paint, excellent corrosion resistance

Seat: Increase the thickness of the inner wall of the valve seat (more than 6mm) to resist the pipeline flushing. The FEP high-temperature expansion valve body is specially processed with reverse buckle groove to prevent the risk of leakage after flange face clamp compression

Dic: Integrated disc, blow out proof design. There are through holes on the valve disc, which can effectively strengthen the adhesion of lining materials, and is suitable for vacuum and thermal cycle

FEP Lined Butterfly Valve Materials

NO.	Description	Materials		Materials According to Norms
NO.	Description	Materials		ASTM	JIS	DIN
1	BODY	Carbon Steel, Stainless Steel, Ductile lron		A216-WCB, A351-CF8, ASTM A395	G5151 SCPH2, G5121 SCS13A, FCD400	GS-45(1 .0446), G-X6CrNiMo1810, GGG-40 (0.7040)
2	DISC	Carbon Steel, Stainless Steel	PTFE, FEP, PFA	A216-WCB, A351-CF8	G5151 SCPH2, G5121 SCS13A	GS–45(1.0446), G-X6CrNiMo1810
3	SEAT	PTFE/FEP/PFA		—	—	—
4	ELASTIC SPACER	EPDM		—	—	—
5	AXLE SLEEVE	Stainless Steel + PTFE		—	—	—
6	Gland	Stainless Steel		304	SUS304	1.4301
7	STEM	Stainless Steel		410, 304	SUS410, SUS304	1.4006, 1.4301
8	BELLEVILLE SPRING	Stainless Steel		304	SUS304	1.4301
9	V-RING	PTFE		—	—	—
10	HEX BOLT	Stainless Steel		304	SUS304	1.4301

Wafer & Lug Type FEP Lined Butterfly Valve Dimension

DN	NPS	Dimensions in mm														ISO 5211	Weight				Cv	Torque
DN	NPS	Dimensions in mm															Wafer	Lug	Handle	Gearbox		Torque
mm	in	A	A1	B	C	D	E	G	H	J	K	T	T1	U	U1		[Kg]	[Kg]	[Kg]	[Kg]		[N∙m]
40	1½	91	146	33	55	109	13	11	40.5	23.5	78	160	200	95	76	F05	2.5	3.2	0.45	1.6	190	35
50	2	102	159	43	65	134.5	13	11	50.5	26.5	89.5	160	200	95	76	F05	3	4.7	0.45	1.6	210	40
65	2½	118	204	46	74	149	13	11	65.5	46.5	104.5	160	200	95	76	F05	3.4	5.8	0.45	1.6	300	48
80	3	135	226	46	84	156	13	11	79.5	65	121.5	160	200	95	76	F05	4	6.5	0.45	1.6	410	56
100	4	158	260	52	100	179	16	14	98.5	84	144	160	260	127	85	F07	5.8	8.5	0.65	1.8	710	82
125	5	184	289	56	116	194	19	17	120.5	107	168.5	160	350	127	102	F07	7.6	10.6	0.8	1.8	1150	120
150	6	214	315	56	132	209	19	17	146.5	136	196.5	160	350	127	102	F07	10	13.9	0.8	1.8	1750	170
200	8	270	383	60	164	237.5	24	22	195.5	186	251.5	215	–	153	–	F10	16.7	17.9	–	3	3550	298
250	10	330	456	68	195	275	24	22	245.5	236	305.5	225	–	185	–	F10	24	27.2	–	5	5100	390
300	12	384	528	78	222	300	29	27	292.5	282	354.5	325	–	248	–	F12	32	35.8	–	10	8870	590
350	14	448	570	78	258	325	29	27	343.5	334	408.5	325	–	248	–	F12	57	87	–	10	9200	810
400	16	510	652	102	294	365	38	36	392	378.5	459	230	–	217	–	F14	69	101	–	18.5	14500	1260
450	18	602	672	114	314	400	38	36	446	431	516	230	–	217	–	F14	82	137	–	18.5	20100	1470
500	20	657	721	127	351	444	38	36	489	472	569	335	–	285	–	F16	96	158	–	41	22000	1800
600	24	766	852	154	410	510	48	46	588	567	669	335	–	285	–	F16	141	242	–	41	31000	2995
700	28	906	992	165	454	553	57	55	699.5	679	780	385	–	310	–	F25	182	290	–	52	39500	3400

*The weight of the wafer and lug type is bare shaft

Flanged Type FEP Lined Butterfly Valve Dimension

DN	NPS	Dimensions in mm															ISO 5211	Weight			Cv	Torque
DN	NPS	PN10			PN16													Double Flanged	Handle	Gearbox		Torque
mm	in	A		C	A	C	B	D	E	☐G	H	K	T	T1	U	U1		[Kg]	[Kg]	[Kg]		[N∙m]
40	1½	150	16		150	16	106	109	13	11	40.5	78	160	200	95	76	F05	10.7	0.45	1.6	190	35
50	2	165	16		165	16	108	134.5	13	11	50.5	89.5	160	200	95	76	F05	16	0.45	1.6	210	40
65	2½	185	16		185	16	112	149	13	11	65.5	104.5	160	200	95	76	F05	19.1	0.45	1.6	300	48
80	3	200	18		200	18	114	156	13	11	79.5	121.5	160	200	95	76	F05	24	0.45	1.6	410	56
100	4	220	18		220	18	127	179	16	14	98.5	144	160	260	127	85	F07	30	0.65	1.8	710	82
125	5	250	20		250	20	140	194	19	17	120.5	168.5	160	350	127	102	F07	35.3	0.8	1.8	1150	120
150	6	285	20		285	20	140	209	19	17	146.5	196.5	160	350	127	102	F07	51.8	0.8	1.8	1750	170
200	8	340	22		340	22	152	237.5	24	22	195.5	251.5	215	–	153	–	F10	65.5	–	3	3550	298
250	10	395	24		405	24	165	275	24	22	245.5	305.5	225	–	185	–	F10	88.7	–	5	5100	390
300	12	445	23		460	25	178	300	29	27	292.5	354.5	325	–	248	–	F12	107.9	–	10	8870	590
350	14	505	23		520	27	190	325	29	27	343.5	408.5	325	–	248	–	F12	166.4	–	10	9200	810
400	16	565	23		580	29	216	365	38	36	392	459	230	–	217	–	F14	200.5	–	18.5	14500	1260
450	18	615	25		640	37	222	400	38	36	446	516	230	–	217	–	F14	289.7	–	18.5	20100	1470
500	20	670	24		715	40	229	444	38	36	489	569	335	–	285	–	F16	366	–	41	22000	1800
600	24	780	30		840	50	267	510	48	46	588	669	335	–	285	–	F16	466	–	41	31000	2995