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KAI WEI XI CHAN PIN FEN LEI

H44F46 Fluorine-Lined Swing Check Valve
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Address：No. 1, Linxia Road, Sanqiao Industrial Zone, Oubei Street, Yongjia County, Zhejiang Province，china
Website：https://www.kaiweixi.com

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H44F46 Fluorine-Lined Swing Check Valve

Model： H44F46-16C/ H44F46-10C/ H44F46-10/ H44F46-16
Specification：DN15-DN500
Temperature：≤150 ℃
Medium：Acids, alkalis and corrosive media

Pressure：PN10,PN16
Connection method：Flange
Driving method：automated
Material：Cast iron, cast steel, stainless steel lined with FEP/PTFE

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H44F46 Fluorine-Lined Swing Check ValveOverview

H44F46 Fluorine-Lined Swing Check Valve Overview

The H44F46 Fluorine-Lined Swing Check Valve is an automatic check valve specifically designed for highly corrosive media. It features a flanged connection and a swing-type structure. The valve body and the internal flow passage surfaces are fully lined with fluoroplastic materials such as perfluoroalkoxy (FEP/PTFE), while the disc is typically constructed as a fully fluoroplastic-lined or fluoroplastic-coated metal core. The valve operates by swinging open under the pressure of forward-flowing medium and automatically closing under its own weight and reverse flow when the medium stops or reverses direction. This design leverages the exceptional chemical inertness of fluoroplastics, enabling resistance to most strong acids, alkalis, organic solvents, and mixed corrosive media. It is widely used in pipelines handling highly corrosive media across industries such as chemical processing, pharmaceuticals, pesticides, electroplating, and environmental protection. The valve serves as a critical safety device to prevent the backflow of harmful media and protect key equipment.

H44F46 Fluorine-Lined Swing Check Valve Product Image

H44F46 Fluorine-Lined Swing Check ValveCharacteristic

H44F46 Fluorine-Lined Swing Check Valve Features

1. Comprehensive Corrosion Resistance Protection

The valve body interior and disc surfaces in contact with the medium are fully lined with FEP/PTFE, providing excellent overall anti-corrosion protection. This makes it suitable for most severe corrosive media environments.

2. Flexible Installation and Low Flow Resistance

Utilizing a swing-type structure, the valve can be installed horizontally or in vertical pipelines with upward flow, offering greater adaptability. When fully open, the flow path is unobstructed with minimal pressure loss.

3. Reliable Sealing and Rapid Closure

The optimized fluorine-lined sealing pair design ensures smooth forward flow and tight reverse closure, effectively preventing medium backflow. The disc has low swing inertia, enabling quick closing action.

4. Anti-Adhesion and Easy Maintenance

The smooth surface of the fluoroplastic lining reduces the risk of crystallization or adhesion of viscous media, minimizing disc jamming due to deposits. The relatively simple structure results in fewer potential failure points.

5. Clear Usage Condition Limitations

Its performance is constrained by the fluoroplastic lining, making it suitable for medium to low-pressure and moderate temperature conditions (typically -20°C to 150°C). It is not recommended for pipelines containing hard suspended particles, high abrasion, or extreme vacuum environments. Care must be taken during installation and maintenance to avoid mechanical damage to the lining.

H44F46 Fluorine-Lined Swing Check Valvestructure principle

H44F46 Fluorine-Lined Swing Check Valve Structure Diagram

Parts Name Material List

NO.	Name	Material
4	disc	Cast Steel, Stainless Steel, Lined with FEP (F46), PCTFE (F3), PTFE (F4)
3	bonnet	Cast Steel, Stainless Steel, Lined with FEP (F46), PCTFE (F3), PTFE (F4)
2	gasket	FEP（F46）、PCTFE（F3）、PTFE（F4）
1	body	Cast Steel, Stainless Steel, Lined with FEP (F46), PCTFE (F3), PTFE (F4)

H44F46 Fluorine-Lined Swing Check Valvetechnology parameter

Performance Specification
Nominal Pressure	1.0/1.6	Mpa
Shell Test	1.5/2.4
Seal Test	1.1/1.76
Suitable Temp.	≤150	℃

H44F46 Fluorine-Lined Swing Check Valvestandard size

Dimensions Standard Requirements

1. The structural length of the valve shall conform to the standard GB/T 12221.

2. The connecting flange shall conform to the standard JB/T79-94、GB9113.1-26.

H44F46 Fluorine-Lined Swing Check Valve View Drawing

H44F46 Fluorine-Lined Swing Check Valve Dimensions Table

DN（mm）	NPS（inch）	L	D	D1	D2	f	b	Z-Φd
DN（mm）	NPS（inch）	PN1.0（MPa）
15	1/2	130	80	55	40	2	12	4-Φ12
20	3/4	150	90	65	50	2	14	4-Φ12
25	1	160	100	75	60	2	14	4-Φ12
32	1 1/4	180	120	90	70	2	16	4-Φ14
40	1 1/2	200	130	100	80	3	16	4-Φ14
50	2	230	140	110	90	3	16	4-Φ14
65	2 1/2	290	160	130	110	3	16	4-Φ14
80	3	310	185	150	125	3	18	4-Φ18
100	4	350	205	170	145	3	18	4-Φ18
125	5	400	235	200	175	3	20	8-Φ18
150	6	480	260	225	200	3	20	8-Φ18
200	8	495	315	280	255	3	22	8-Φ18
250	10	622	370	335	310	3	24	12-Φ18
300	12	698	435	395	362	4	24	12-Φ23
350	14	787	485	445	412	4	26	12-Φ23
400	16	914	535	495	462	4	28	16-Φ23
450	18	978	590	550	518	4	28	16-Φ23
500	20	978	640	600	568	4	30	16-Φ23

Articles related to technology research and development

Slow-closing wafer check valve patent

The utility model provides a slow-closing wafer check valve, which includes a valve body, a valve disc, a valve shaft, and a torsion spring sleeved on the valve shaft. The valve body is provided with a medium channel for medium circulation in the axial direction, which includes an inlet end and an outlet end. The valve disc, valve shaft, and torsion spring are symmetrically arranged in two groups relative to the center of the valve body. The utility model further includes a damping device located at the inlet end, which includes a cylinder inserted on the valve body, a piston rod located inside the cylinder, a spring, and a cover connected to the outer end of the cylinder. The cylinder is provided with a first cavity and a second cavity that are connected and communicated. The cross-section of the second cavity is square, and its cross-sectional area is larger than that of the first cavity. One end of the piston rod located inside the medium channel is provided with a movable block. The utility model has low noise and technical characteristics of quick opening, slow closing, and water hammer elimination, enabling light-load pump start-up and preventing the generation of water hammer during pump shutdown.
1. A slow-closing wafer check valve, comprising a valve body, a valve disc, a valve shaft, and a torsion spring sleeved on the valve shaft. The valve body is provided with a medium passage for medium circulation in the axial direction, and the medium passage includes an inlet end and an outlet end. The valve disc, valve shaft, and torsion spring are symmetrically arranged in two groups relative to the center of the valve body. The valve also comprises a damping device located at the inlet end. The damping device includes a cylinder inserted on the valve body, a piston rod located inside the cylinder, a spring, and a cover connected to the outer end of the cylinder. The cylinder is provided with a first cavity and a second cavity that are connected and communicated. The cross-section of the second cavity is square, and the cross-sectional area of the second cavity is larger than that of the first cavity. One end of the piston rod is located inside the second cavity, and the other end penetrates through the first cavity and is located inside the medium passage. The end of the piston rod located inside the medium passage is provided with a movable block, and the end of the piston rod located inside the second cavity is provided with an external thread. The second cavity is provided with a limit plate that is adapted to and threadedly connected with the piston rod. The spring is sleeved on the piston rod, with one end abutting against the limit plate and the other end abutting against the inner wall of the second cavity. The side of the valve disc facing the piston rod is provided with a driving block that cooperates with the movable block. During the closing process of the valve disc, the side of the driving block facing the center of the valve body cooperates with the movable block to achieve displacement of the piston rod relative to the cylinder towards the center of the valve body. The damping device is symmetrically arranged in two groups relative to the center of the valve body.
2. A slow-closing wafer check valve according to claim 1, characterized in that a square hole is axially provided at the end of the piston rod located in the second cavity, an adjuster is inserted at a position on the cover corresponding to the square hole, a driving rod adapted to the square hole is provided at the end of the adjuster, and the adjuster is rotatable relative to the cover.
3. A slow-closing wafer check valve according to claim 2, characterized in that a limit slot is provided at the connection between the cover and the regulator, and a limit mechanism is arranged inside the limit slot. The limit mechanism comprises a ball, a tower spring connected to the ball, and a positioning column for fixing the tower spring. At least four engaging slots adapted to the ball are provided circumferentially at the connection between the regulator and the cover.
4. A slow-closing wafer check valve according to claim 3, characterized in that the top edge of the engaging groove is provided with a rounded corner.
5. A slow-closing wafer check valve according to claim 1, characterized in that the valve body is provided with a stepped groove adapted to the cylinder body.
6. A slow-closing wafer check valve according to claim 5, characterized in that a sealing ring is sleeved at the connection between the cylinder and the valve body.
7. A slow-closing wafer check valve according to claim 1, characterized in that the valve disc is provided with a build-up welding layer that is sealed with the valve body. 8. A slow-closing wafer check valve according to claim 7, characterized in that one side of the build-up welding layer is provided with vulcanized rubber that is sealed with the valve body.

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

H44F46 Fluorine-Lined Swing Check Valve

More Swing check valve>>

More check valve>>

More valve>>

H44F46 Fluorine-Lined Swing Check Valve