Product Description

The lift-type fluorine-lined check valve is also called a check valve. The internal flow channel seal of the valve body is fully lined with PTFE, which has the characteristics of high strength and good corrosion resistance. It is suitable for various concentrations of aqua regia, sulfuric acid, hydrochloric acid, hydrofluoric acid and various organic acids, strong acids and strong oxidants at temperatures of -50℃～150℃. FEP is also suitable for various concentrations of strong alkali organic solvents and other corrosion products. It is used to prevent the backflow of the medium on the pipeline of the inert gas and liquid medium.

Working Principle

During the use of the lift-type fluorine-lined check valve, the medium flows in the direction of the arrow shown in the figure. When the medium flows in the specified direction, the valve disc is opened by the force of the medium; when the medium flows backward, the valve disc and the sealing surface of the valve seat are tightly closed due to the self-weight of the valve disc and the action of the reverse force of the medium by the valve disc. Close to prevent the reverse flow of the medium.

Material of main parts

NO	Part Name	Grey cast iron	Cast steel	Stainless acid-resistant cast steel		Ultra-low carbon stainless acid-resistant cast steel
		Z	C	P	R	PL	RL
1	Body/bonnet	HT250	WCB	CF8	CF8M	CF3	CF3M
2	Disc/Stem	35	1Cr13	1Cr18Ni9	1Cr18Ni12Mo2Ti	00Cr18Ni10	00Cr17Ni14Mo2
3	Lining/Seat	PCTEF（F3）,FEP（F46）,PFA（SolubleF4）,PP,PO
4	Fastening bolts	WCB		1Cr17Ni2		1Cr18Ni9Ti
5	Nut	PTFE（F4）		CF8		CF8

Main external connection dimensions

DN		Main dimensions									Reference
DN mm	NPS inch	L	L1	L2	D	D1	D2	b	f	Z- φd	WT (kg)
PN1.0MPa
15	1/ 2	130	130	80	95	65	45	16	2	4-φ14	5
20	3 /4	150	150	90	105	75	58	18	2	4-φ14	6
25	1	160	160	100	115	85	68	18	2	4-φ14	7
32	11/4	180	180	110	140	100	78	18	2	4-φ18	8
40	11/2	200	200	125	150	110	88	18	2	4-φ18	10
50	2	230	230	140	165	125	102	18	2	4-φ18	12
65	21/2	290	290	160	185	145	122	18	2	8-φ18	18
80	3	310	310	185	200	160	138	20	2	8-φ18	28
100	4	350	350	210	220	180	158	20	2	8-φ18	37
125	5	400	400	250	250	210	188	22	2	8-φ18	58
150	6	480	480	300	285	240	212	22	2	8-φ22	75
200	8	600	495	380	340	295	268	24	2	8-φ22	120
250	10	730	600	420	395	350	320	26	2	12-φ22	160
PN1.6MPa
15	1/ 2	130	130	80	95	65	45	16	2	4-φ14	5
20	3 /4	150	150	90	105	75	58	18	2	4-φ14	6
25	1	160	160	100	115	85	68	18	2	4-φ14	7
32	11/4	180	180	110	140	100	78	18	2	4-φ18	8
40	11/2	200	200	125	150	110	88	18	2	4-φ18	10
50	2	230	230	140	165	125	102	18	2	4-φ18	12
65	21/2	290	290	160	185	145	122	18	2	8-φ18	18
80	3	310	310	185	200	160	138	20	2	8-φ18	28
100	4	350	350	210	220	180	158	20	2	8-φ18	37
125	5	400	400	250	250	210	188	22	2	8-φ18	58
150	6	480	480	300	285	240	212	22	2	8-φ22	75
200	8	600	495	380	340	295	268	24	2	12-φ22	120
250	10	730	600	420	405	355	320	26	2	12-φ26	160