PTFE Fully Lined Wafer Butterfly Valve

Compare to the EPDM Seat butterfly valve, the PTFE Seat has some more advantages.

• Corrosion resistance: PTFE has excellent corrosion resistance to various corrosive liquids, including strong acids, strong alkalis, etc.
• Temperature Range: PTFE can withstand higher temperatures than EPDM，while It has a temperature range of approximately -250°C to +260°C (-418°F to +500°F)..
• Versatility: PTFE is also called “Plastic King” in China, so it is suitable for different types of media, whether it is corrosive or non-corrosive fluid.
• Low Friction: PTFE has a low coefficient of friction, reducing wear on valve components, as a result, it can increases service life and reduces maintenance.
• Universal Sealing Material: PTFE is a universal sealing material， as it is compatible with various flanges and gaskets.

DN		A	B	C	D	L	H	D1	n-ø	K	E	n1-ø1	ø2
mm	inch
50	2″	161	80	42	52.9	32	84.84	120	4-ø23	77	57.15	4-ø6.7	12.6
65	2.5″	175	89	44.7	64.5	32	96.2	136.2	4-ø26.5	77	57.15	4-ø6.7	12.6
80	3″	181	95	45.2	78.8	32	61.23	160	8-ø18	77	57.15	4-ø6.7	12.6
100	4″	200	114	52.1	104	32	70.80	185	4-ø24.5	92	69.85	4-ø10.3	15.77
125	5″	213	127	54.4	123.3	32	82.28	215	4-ø23	92	69.85	4-ø10.3	18.92
150	6″	226	139	55.8	155.6	32	91.08	238	4-ø25	92	69.85	4-ø10.3	18.92
200	8″	260	175	60.6	202.5	45	112.89/76.35	295	4-ø25	115	88.9	4-ø14.3	22.1
									/4-ø23
250	10″	292	203	65.6	250.5	45	92.40	357	4-ø29	115	88.9	4-ø14.3	28.45
300	12″	337	242	76.9	301.6	45	105.34	407	4-ø29	140	107.95	4-ø14.3	31.6
350	14″	368	267	76.5	333.3	45	91.11	467	4-ø30	140	107.95	4-ø14.3	31.6
400	16″	400	309	86.5	389.6	51.2	100.47/102.42	515	4-ø26	197	158.75	4-ø20.6	33.15
						/72		/525	/4-ø30
450	18″	422	328	105.6	440.51	51.2	88.39/91.51	565	4-ø26	197	158.75	4-ø20.6	38
						/72		/585	/4-ø30
500	20″	480	361	131.8	491.6	64.2	96.99/101.68	620	4-ø26	197	158.75	4-ø20.6	41.15
						/82		/650	/4-ø33
600	24″	562	459	152	592.5	70.2	113.42/120.46	725	20-ø30	276	215.9	4-ø22.2	50.65
						/82		/770	/20-ø36
700	28″	624	520	163	695	66	109.65	840	24-ø30	300	254	8-ø18	55/63.35
						/82			/20-ø36
800	32″	672	591	188	794.7	66	124	950	24-ø33	300	254	8-ø18	55/63.35
						/82			/24-ø39
900	36″	720	656	203	864.7	118	117.57	1050	24-ø33	300	254	8-ø18	75
1000	40″	800	721	216	965	142	129.89	1160	24-ø36	300	254	8-ø18	85