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KAI WEI XI CHAN PIN FEN LEI

H42F46 Fluorine-Lined Lift Check Valve
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Phone：+86（577）6730 7899
Mobile：+86 189 6779 6135
Fax：+86（577）6738 7099
Email：Yannie@kaiweixi.com
Address：No. 1, Linxia Road, Sanqiao Industrial Zone, Oubei Street, Yongjia County, Zhejiang Province，china
Website：https://www.kaiweixi.com

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H42F46 Fluorine-Lined Lift Check Valve

Model：H42F46-16C/H42F46-10C/H42F46-25C/H42F46-16/H42F46-10/H42F46-25/H42F46-16P/H42F46-25P
Specification：DN25-DN150
Temperature：≤150 ℃
Medium：Sulfuric Acid, Hydrochloric Acid, Strong Oxidizers, Liquid Media

Pressure：PN10,PN16,PN25
Connection method：Flange
Driving method：automated
Material：Cast Iron, Cast Steel, Stainless Steel Lined with FEP/PTFE

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H42F46 Fluorine-Lined Lift Check ValveOverview

H42F46 Fluorine-Lined Lift Check Valve Overview

The H42F46 Fluorine-Lined Lift Check Valve is a specialized valve designed for highly corrosive media. Its valve body and inner surface are entirely lined with fluoroplastic materials such as perfluoroalkoxy (FEP) or polytetrafluoroethylene (PTFE). Featuring flanged connections and a lift-type structure, the valve achieves unidirectional flow control through the vertical motion of its disc.

The working principle involves the disc lifting open under the pressure of forward-flowing medium and automatically closing under its own weight and reverse pressure when the medium stops or reverses. The sealing surfaces are typically composed of corrosion-resistant alloys or fluoroplastics.

By leveraging the exceptional chemical inertness of fluoroplastics, this valve can withstand erosion from most strong acids, strong alkalis, organic solvents, and various mixed corrosive media. It is widely used in corrosive media pipeline systems across industries such as chemical processing, pharmaceuticals, metallurgy, electroplating, and environmental protection, serving as a critical safety device to prevent the backflow of harmful media.

H42F46 Fluorine-Lined Lift Check Valve Product Image

H42F46 Fluorine-Lined Lift Check ValveCharacteristic

H42F46 Fluorine-Lined Lift Check Valve Features

1. Outstanding Corrosion Resistance

The valve body cavity and flow passage components are fully lined with fluoroplastics such as FEP/PTFE, offering excellent resistance to almost all concentrations of acids, alkalis, salts, and organic solvents. This effectively addresses the corrosion vulnerability of metal valves.

2. Reliable Sealing and Safety

The sealing pair is specifically optimized for corrosive media, ensuring dependable closure and sealing performance. It effectively prevents the backflow of hazardous media, safeguarding upstream equipment and operational safety.

3. Strict Installation Requirements

The valve must be installed strictly horizontally with the valve stem kept vertical to ensure the disc can freely return under gravity. Correct installation orientation is fundamental to its proper operation.

4. Lightweight and Anti-Adhesion Properties

The fluoroplastic lining features a smooth, dense surface with an extremely low friction coefficient, minimizing adhesion of crystalline or deposited media. This design results in low flow resistance and a relatively lightweight valve structure.

5. Application Scope and Limitations

The operating temperature and pressure ranges are limited by the properties of the fluoroplastic lining (typically suitable for -20°C to 150°C and low to medium-pressure applications). It is not recommended for use with media containing hard particles, highly abrasive conditions, or extreme vacuum environments. Care must be taken during installation and maintenance to avoid damaging the lining layer.

H42F46 Fluorine-Lined Lift Check Valvestructure principle

H42F46 Fluorine-Lined Lift Check Valve Structure Diagram

Parts Name Material List

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

H42F46 Fluorine-Lined Lift Check Valvetechnology parameter

Performance Specification
Nominal Pressure	1.0/1.6/2.5	Mpa
Shell Test	1.5/2.4/3.75
Seal Test	1.1/1.76/2.75
Suitable Temp.	≤150	℃

H42F46 Fluorine-Lined Lift 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.

H42F46 Fluorine-Lined Lift Check Valve View Drawing

H42F46 Fluorine-Lined Lift Check Valve Dimensions Table

SIZE	PN6尺寸 mm
DN	L	D	D1	D2	f	b	Z-Φd
25	152	100	75	60	3	14	4-Φ12
32	152	120	90	70	3	16	4-Φ14
40	178	130	100	80	3	16	4-Φ14
50	178	140	110	90	3	16	4-Φ14
65	190	160	130	110	3.5	18	4-Φ14
80	203	185	150	125	3.5	18	4-Φ18
100	267	205	170	145	4	20	4-Φ18
125	305	235	200	175	4	20	8-Φ18
150	394	260	225	200	4	20	8-Φ18
SIZE	PN10尺寸 mm
DN	L	D	D1	D2	f	b	Z-Φd
25	152	115	85	65	3	16	4-Φ14
32	152	135	100	70	3	18	4-Φ18
40	178	145	110	85	3	18	4-Φ18
50	178	160	125	100	3	18	4-Φ18
65	190	180	145	120	3.5	20	4-Φ18
80	203	195	160	135	3.5	20	4-Φ18
100	267	215	180	155	4	22	8-Φ18
125	305	245	210	185	4	24	8-Φ18
150	394	280	240	210	4	24	8-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

H42F46 Fluorine-Lined Lift Check Valve

More Lift Check Valve>>

More check valve>>

More valve>>

H42F46 Fluorine-Lined Lift Check Valve