A PTFE-lined swing check valve, or simply a PTFE-lined swing check valve, is a type of valve that allows unidirectional flow using the pressure of the medium itself. Its core component, the valve disc, automatically opens or closes based on the pressure of the flowing medium, preventing backflow and ensuring the safe and stable operation of the pipeline system. Compared to other types of check valves, PTFE-lined swing check valves have unique advantages, making them widely used in many harsh operating conditions.
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PTFE-lined swing check valve Technical parameters
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
Fluorine-Lined Swing Check Valve Structural Features:
(1) Uses rubber sealing rings, which are elastic, wear-resistant, and have excellent aging resistance (no corrosion occurs at the rubber contact points), resulting in a long service life.
(2) Integral molding in one piece, lightweight, easy and quick installation, low fluid resistance and large flow rate, with a large adjustable ratio (generally above 1).
(3) No friction coefficient in the inner cavity, making it less prone to scaling and clogging. It also possesses self-lubricating and anti-adhesion properties.
(4) Small size and easy installation: Because this type of valve is not affected by the scouring effect of the medium or pressure loss in the pipeline, its size is relatively small. Furthermore, the fact that this type of valve is usually in a normally open state and requires no maintenance makes its application range even wider.
Main Spare Part Bill of Fluorine-Lined Swing Check Valve 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 |
Main Connection Dimensions and Weight of PTFE-lined swing check valve:
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 |
Applications of Swing Check Valves with Fluorine Lining
swing check valves with fluoropolymer lining are widely used in the following fields:
1. Chemical Industry: Used for conveying various corrosive chemical media, such as hydrochloric acid, sulfuric acid, and nitric acid.
2. Pharmaceutical Industry: Used for conveying medicines and reagents, ensuring the purity and safety of the media.
3. Food Industry: Used for conveying food raw materials and additives, meeting food hygiene requirements.
4. Environmental Protection Industry: Used for treating wastewater and waste gas, resisting the erosion of corrosive media.
5. Electronics Industry: Used for conveying high-purity chemicals, ensuring the cleanliness of the production process.
Fluorine-Lined Swing Check Valve factory
