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Home > Industrial Equipment & Components > Valve > Ball Valve > Corrosion Resistant PTFE Lined Check Valve for Harsh Chemical Liquids

Corrosion Resistant PTFE Lined Check Valve for Harsh Chemical Liquids

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Product Spotlights

Corrosion Resistant PTFE Lined Check Valve for Harsh Chemical Liquids

Negotiable MOQ: 1 Piece (Price negotiable depending on order volume and customization)

Key Specifications

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Business Type:

Manufacturer

Year Established:

1996

Product Certifications:

ISO9001

Contact Supplier Request Quote Chat Now

Shanghai Teflon Anti-Corrosion Equipment Co., Ltd.

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

Shanghai

Delivery Detail:

15 days

Product Details
Company Profile
Contact Us

Corrosion Resistant PTFE Lined Check Valve for Harsh Chemical Liquids

Fluorine-lined flanged butterfly valve with signal feedback. The butterfly valve utilizes a disc that rotates with the stem as the opening/closing element to control flow. In addition to shut-off and throttling functions, these valves offer advantages such as small size, light weight, and compact structure; compared to gate valves of similar specifications, they are 30–50% lighter. A 90° rotation of the disc completes the opening or closing cycle. Furthermore, because the forces exerted by the medium on the disc sections on either side of the shaft are nearly balanced, the operating torque required is relatively low.

I. Fluoroplastic-lined butterfly valve series introduced by the company

1. There are two basic types: the D71F4 and D71F46 (concentric) fully lined wafer-style butterfly valves, and the D41F4 and D41F46 (concentric) fully lined flanged butterfly valves. They feature a split two-piece valve body design with an integrated valve seat and body lining. During operation, only the all-plastic seat and the plastic-lined disc come into contact with the medium. The product is resistant to corrosion from virtually all media (except molten alkali metals and elemental fluorine). In the D71F46 model, the stem and disc (forged) are integrated and uniformly encapsulated in FEP. The internal flow passage is smooth, offering a high Cv value and excellent flow capacity with moderate operating torque. A four-stage sealing structure is employed, featuring a temperature- and aging-resistant silicone (SI) rubber elastic seat liner to ensure zero leakage.

2. Derived from the models above, the D41F4 and D41F46 flanged butterfly valves feature a fully lined body and a stainless steel disc with a partial lining.

II. Structural Features

1. The concentric butterfly valve features a disc and seat that are aligned within a 360° circle (sharing the same centerline), providing sealing capabilities and allowing for the free adjustment of pressure and flow.

2. Four-stage loaded elastic sealing ensures absolute zero leakage, both internally and externally. A. Special transition curves at the connection points between the shaft head and the disc circumference, combined with an optimized interference fit with the valve seat. B. The shaft end face utilizes a combination of an elastic O-ring, a rigid washer at the shaft shoulder, and an elastic rubber gasket. C. The radial seal of the shaft employs a combination of an O-ring and a metal washer. D. The valve seat is embedded in a groove within the valve body that features an elastic strip.

III. Actuation methods: manual, worm gear, pneumatic, and electric.

Fluoroplastic-lined valves (often referred to simply as "fluorine-lined valves") offer excellent corrosion resistance. Types include ball valves, flanged butterfly valves, wafer butterfly valves, gate valves, globe valves, check valves, diaphragm valves, and control valves. These valves can be equipped with worm gear, electric, or pneumatic actuators to enable automated control.

Models of fluoroplastic-lined ball valves manufactured by Shanghai Corrosion-Resistant Valve Group include: Q41F46-16C, Q341F46-16C, Q641F46-16C, Q941F46-16C, Q41PFA-16C, Q341PFA-16C, Q641PFA-16C, Q941PFA-16C, etc. Fluorine-lined wafer butterfly valves manufactured by Shanghai Naifu Valve Group include the following models: D71F46-10C, D371F46-10C, D671F46-10C, D971F46-10C, D71F46-16C, D371F46-16C, D671F46-16C, D971F46-16C, D71F4-10C, D371F4-10C, D671F4-10C, D971F4-10C, D71F4-16C, D371F4-16C, D671F4-16C, D971F4-16C, D71PFA-10C, D371PFA-10C, D671PFA-10C, D971PFA-10C, D71PFA-16C, D371PFA-16C, D671PFA-16C, D971PFA-16C, etc. Fluorine-lined flanged butterfly valve models manufactured by Shanghai Naifu Valve Group include: D41F46-10C, D341F46-10C, D641F46-10C, D941F46-10C, D41F46-16C, D341F46-16C, D641F46-16C, D941F46-16C, D41F4-10C, D341F4-10C, D641F4-10C, D941F4-10C, D41F4-16C, D341F4-16C, D641F4-16C, D941F4-16C, D41PFA-10C, D341PFA-10C, D641PFA-10C, D941PFA-10C, D41PFA-16C, D341PFA-16C, D641PFA-16C, D941PFA-16C, etc. Fluorine-lined gate valve models manufactured by Shanghai Naifu Valve Group: Z41F46-10C, Z641F46-10C, Z941F46-10C, Z41F46-16C, Z641F46-16C, Z941F46-16C, Z41PFA-10C, Z641PFA-10C, Z941PFA-10C, Z41PFA-16C, Z641PFA-16C, Z941PFA-16C,

Fluorine-lined globe valve models manufactured by Shanghai Naifu Valve Group: J41F46-10C, J641F46-10C, J941F46-10C, J41F46-16C, J641F46-16C, J941F46-16C, J41PFA-10C, J641PFA-10C, J941PFA-10C, J41PFA-16C, J641PFA-16C, J941PFA-16C, J44F46-10C, J644F46-10C, J944F46-10C, J44F46-16C, J644F46-16C, J944F46-16C, J44PFA-10C, J644PFA-10C, J944PFA-10C, J44PFA-16C, J644PFA-16C, J944PFA-16C, J45F46-10C, J645F46-10C, J945F46-10C, J45F46-16C, J645F46-16C, J945F46-16C, J45PFA-10C, J645PFA-10C, J945PFA-10C, J45PFA-16C, J645PFA-16C, J945PFA-16C, etc.

Fluorine-lined check valve models manufactured by Shanghai Naifu Valve Group: H41F46-10C, H41F46-16C, H42F46-10C, H42F46-16C, H44F46-10C, H44F46-16C, etc. Fluorine-lined diaphragm valves manufactured by Shanghai Naifu Valve Group include models such as G41F46-10C, G341F46-10C, G641F46-10C, G941F46-10C, G41F46-16C, G341F46-16C, G641F46-16C, and G941F46-16C.

Valve body materials include: carbon steel, stainless steel, WCB, 304, 316, 316L, etc.

Lining materials include: F46, F4, PFA, PO, etc.

Pressure ratings include: 6 bar, 10 bar, 16 bar, ANSI Class 150LB, etc.

Specification

NO.	Part Name	Material	Optional Material
1	Body	DI	CI, WCB, Stainless Steel
2	Down Bearing	F4	Bronze
3	Seat	NBR	EPDM, FKM
4	Disc	Plated Ductile Iron	ASTM A351 CF8/CF8M, B148 C954/C958
5	Shaft	ASTM A276 416	304, 316, 17-4PH
6	Middle Bearing	F4	Bronze
7	Upper Bearing	F4	Bronze
8	O Ring	NBR	EPDM, FKM
9	Pin	ASTM A276 416	316, 17-4PH, Monel

Dimensions data(mm)

DN	A	B	C	H	ΦE	ΦF	N-ΦK	Φd	G	EN1092-2 PN10	EN1092-2 PN16	ANSI CLASS 125
ΦD	n-Φd1	n-M	ΦD	n-Φd1	n-M	ΦD	n-Φd1	n-M
DN40	120 (140)	75	33	32	90	50	4-Φ7	12.6	9.5	110	4-Φ19	4-M16	110	4-Φ19	4-M16	98.5	4-Φ16	4-1/2"
DN50	124 (161)	80	43	32	90	50	4-Φ7	12.6	9.5	125	4-Φ19	4-M16	125	4-Φ19	4-M16	120.5	4-Φ19	4-5/8"
DN65	134 (175)	89	46	32	90	50	4-Φ7	12.6	9.5	145	4-Φ19	4-M16	145	4-Φ19	4-M16	139.5	4-Φ19	4-5/8"
DN80	141 (181)	95	46	32	90	50	4-Φ7	12.6	9.5	160	8-Φ19	8-M16	160	8-Φ19	8-M16	152.5	4-Φ19	4-5/8"
DN100	156 (200)	114	52	32	90	70	4-Φ10	15.8	11.1	180	8-Φ19	8-M16	180	8-Φ19	8-M16	190.5	8-Φ19	8-5/8"
DN125	168 (213)	127	56	32	90	70	4-Φ10	18.92	12.7	210	8-Φ19	8-M16	210	8-Φ19	8-M16	216	8-Φ22	8-3/4"
DN150	184 (226)	140	56	32	90	70	4-Φ10	18.92	12.7	240	8-Φ23	8-M20	240	8-Φ23	8-M20	241.5	8-Φ22	8-3/4"
DN200	213 (260)	175	60	45	125	102	4-Φ12	22.1	15.9	295	8-Φ23	8-M20	295	12-Φ23	12-M20	298.5	8-Φ22	8-3/4"
DN250	244 (292)	220	68	45	125	102	4-Φ12	28.45	22	350	12-Φ23	12-M20	355	12-Φ28	12-M24	362	12-Φ25	12-7/8"
DN300	283 (337)	255	78	45	150	125	4-Φ14	31.6	24	400	12-Φ23	12-M20	410	12-Φ28	12-M24	432	12-Φ25	12-7/8"
DN350	368	267	78	45	150	125	4-Φ14	31.6	24	460	16-Φ23	16-M20	470	16-Φ28	16-M24	476	12-Φ29	12-1"
DN400	400	323	102	50	150	125	4-Φ14	33.15	27	515	16-Φ28	16-M24	525	16-Φ31	16-M27	539.5	16-Φ29	16-1"
DN450	422	342	114	50	210	140	4-Φ18	37.95	27	565	20-Φ28	20-M24	585	20-Φ31	20-M27	578	16-Φ32	16-1 1/8"
DN500	479	373	127	60	210	140	4-Φ18	41.12	32	620	20-Φ28	20-M24	650	20-Φ34	20-M31	635	20-Φ32	20-1 1/8"
DN600	562	467	154	70	210	165	4-Φ22	50.62	36	725	20-Φ31	20-M27	770	20-Φ37	20-M33	749.5	20-Φ35	20-1 1/4"
DN700	624	524	165	72	300	254	8-Φ18	63.35	KEY 2-18	840	24-Φ31	24-M27	840	24-Φ37	24-M33	863.6	28-Φ35	28-1 1/4"
DN800	652	589	190	100	300	254	8-Φ18	63.35	KEY 2-18	950	24-Φ34	20-M30	950	24-Φ41	20-M36	977.9	28-Φ41	28-1 1/2"