Fluorine-Lined Swing Check Valve

Flange connection PTFE-lined check valve (Full liner)

Design and manufacturing comply with China national standards

Basic structure form: Swing type (H44), Lift type (H41)

Nominal Pressure: PN 0.6 – 1.6 MPa

Nominal Diameter: DN15 – DN500

Basic model: H41F3, H41F46, H44F3, H44F46

Product Overview

The Fluorine-Lined Swing Check Valve is a corrosion-resistant, non-return valve designed for harsh chemical service environments. It features an internal lining of fluoroplastic materials such as PTFE, FEP, or PFA, which provides excellent resistance to strong acids, alkalis, oxidants, and organic solvents. The swing-type disc structure ensures minimal flow resistance and automatic closure when reverse flow occurs, preventing backflow and protecting upstream equipment.

The valve body is typically made from WCB (carbon steel) or stainless steel and is fully lined to isolate all wetted surfaces from the process media. The design complies with GB, ANSI, or DIN standards and is suitable for horizontal or vertical installations.

Product Features

◇ Applicable Standards:

Follow the Standard: STANDARD
Design & Manufacture: GB 12235 (GB 2236)
Structure Length: GB 12221 (Long and Short Series)
Flange Size: JB/T78, JB/T79 (or based on contract requirements)
Pressure Test: GB/T 13927
Marking: GB 12220
Availability: GB/T 12252

◇ Main Spare Part Bill of Materials:

NO.	Part Name	Grey Cast Iron (Z)	Carbon Steel (C)	Stainless Steel (P)	High Alloy SS (R)	Low Carbon SS (RL)
1	Body, Cover, Disc	HT250	WCB	CF8 / CF8M	CF3	CF3M
2	Lining Layer	FEP (F46), PFA, PTFE, PCTFE (F3), PO (polyolefin)
3	Pin	1Cr13/35, WCB, 1Cr18Ni9/CF8, 00Cr17Ni14Mo2/CF3M
4	Diaphragm	35	35	1Cr17Ni2	1Cr18Ni9Ti	1Cr18Ni9Ti

Specification Parameters

◇ Main Connection Dimensions and Weight:

For PN0.6MPa:

DN (mm)	NPS (inch)	L	D	D1	D2	b	Z–Φd	H	Weight (kg)
15	1/2	130	80	55	40	2	4–Φ12	105	4
20	3/4	150	90	65	50	2	4–Φ14	115	5
25	1	160	100	75	58	2	4–Φ14	125	7
32	1 1/4	180	120	90	70	2	4–Φ18	140	8
40	1 1/2	200	130	100	78	2	4–Φ18	145	9
50	2	230	140	110	88	2	4–Φ18	155	11
65	2 1/2	290	160	130	110	2	4–Φ18	170	15
80	3	310	185	150	125	3	4–Φ18	190	18
100	4	360	210	170	145	3	8–Φ18	225	25
125	5	400	250	200	175	3	8–Φ18	260	40
150	6	480	285	225	200	3	8–Φ22	300	60
200	8	550	340	280	255	3	8–Φ22	360	100
250	10	622	370	335	310	3	12–Φ22	410	145
300	12	698	430	395	362	4	12–Φ22	480	190
350	14	787	485	445	412	4	16–Φ22	535	230
400	16	914	535	495	462	4	16–Φ26	585	300
450	18	978	590	550	518	4	20–Φ26	385	276
500	20	978	640	600	568	4	20–Φ26	740	415

For PN1.0MPa:

DN (mm)	NPS (inch)	L	D	D1	D2	f	b	Z–Φd	B	H	Weight (kg)
15	1/2	130	95	65	45	2	14	4–Φ14	105	55	5
20	3/4	150	105	75	55	2	16	4–Φ14	115	58	7
25	1	160	115	85	65	2	16	4–Φ14	128	60	9
32	1 1/4	180	135	100	78	2	18	4–Φ18	145	75	11
40	1 1/2	200	145	110	85	3	18	4–Φ18	160	82	13.5
50	2	230	160	125	100	3	20	4–Φ18	178	95	18
65	2 1/2	290	180	145	120	3	20	4–Φ18	205	105	22
80	3	310	195	160	135	3	22	4/8–Φ18	230	120	28
100	4	350	215	180	155	3	22	8–Φ18	255	135	34
125	5	400	245	210	185	3	24	8–Φ18	305	158	58
150	6	480	280	240	210	3	24	8–Φ23	345	180	72
200	8	495	335	295	265	3	30	12–Φ23	415	215	156
250	10	622	390	350	320	3	28	12–Φ23	490	240	165
300	12	698	440	400	368	4	28	12–Φ23	540	265	190
350	14	787	500	460	428	4	30	16–Φ23	585	300	225
400	16	914	565	515	482	4	32	16–Φ23	635	360	254
450	18	978	615	565	532	4	32	20–Φ25	680	385	285
500	20	978	670	620	585	4	34	20–Φ25	740	415	333

For PN1.6MPa:

DN (mm)	NPS (inch)	L	D	D1	D2	f	b	Z–Φd	B	H	Weight (kg)
15	1/2	130	95	65	45	2	14	4–Φ14	110	55	6
20	3/4	150	105	75	55	2	16	4–Φ14	120	58	7.8
25	1	160	115	85	65	2	16	4–Φ14	135	60	10
32	1 1/4	180	135	100	78	2	18	4–Φ18	150	75	12.5
40	1 1/2	200	145	110	85	3	18	4–Φ18	165	82	14.5
50	2	230	160	125	100	3	20	4–Φ18	185	95	19.5
65	2 1/2	290	180	145	120	3	20	4–Φ18	210	105	25.5
80	3	310	195	160	135	3	22	8–Φ18	235	120	30
100	4	350	215	180	155	3	24	8–Φ18	260	135	36
125	5	400	245	210	185	3	24	8–Φ23	310	158	62
150	6	480	280	240	210	3	24	8–Φ23	350	180	78
200	8	495	335	295	265	3	30	12–Φ23	420	215	156
250	10	622	405	355	320	4	32	12–Φ25	505	240	172
300	12	698	460	410	375	4	34	12–Φ25	560	265	240
350	14	787	525	470	435	4	38	16–Φ25	605	300	208
400	16	914	580	525	485	4	40	16–Φ30	650	350	265

Notes:

For flange size PN1.0MPa, DN80 flange bolt holes comply with JB78 Z=4; others follow Z=8.
Z = number of bolt holes.

Specification Applications

Chemical and Petrochemical Industry: Suitable for highly corrosive fluids such as hydrochloric acid, sulfuric acid, or chlorine-containing compounds.
Pharmaceutical Manufacturing: Used for transferring reactive or pure chemical solutions without contamination.
Water Treatment and Wastewater Plants: Ideal for systems using chemical dosing or involving corrosive waste streams.
Pulp and Paper Industry: Handles aggressive bleaching agents and chemical pulps effectively.
Semiconductor and Electronics: Protects pure chemical delivery systems from contamination and backflow.

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