Fluorine Lined Gate Valve

Definition: A gate valve that is lined with fluoroplastics (such as polytetrafluoroethylene (PTFE), FEP, etc.) on the inner wall of a metal valve body or on the surface of key components. The lining process enhances corrosion resistance and is specifically designed for controlling corrosive media such as strong acids, strong alkalis, and organic solvents.


Core features:

Corrosion resistance: Fluoroplastic lining can resist strong corrosive media such as sulfuric acid, hydrochloric acid, hydrofluoric acid, etc., extending the service life of valves;

Structural design: Retain the full bore flow channel of traditional gate valves, with vertically moving gate valves as the opening and closing components, only supporting fully open or fully closed operations to avoid throttling adjustments;

Applicable scenarios: Pipeline systems in chemical, pharmaceutical, petroleum and other industries that require the treatment of corrosive fluids, with a temperature range generally ranging from -50 ℃ to 150 ℃.

Limitations: Due to the temperature resistance limitations of fluoroplastics, they are not suitable for extreme high or low temperature conditions.

  • Diversified adaptability
  • Improved safety and durability
  • Wide temperature range adaptability
  • Lightweight and easy maintenance
  • Sealing performance optimization
  • Low flow resistance structure design
  • Fluoroplastic lining enhances corrosion resistance
Diversified adaptability
  • Diversified adaptability
    01
    Compatible with manual, electric, and pneumatic drive modes, compatible with connection standards such as flanges and American standards, meeting the control needs of corrosive media in industries such as chemical, pharmaceutical, and food.
Improved safety and durability
  • Improved safety and durability
    01
    The valve stem and gate are designed with an integrated structure to disperse pressure impact; The high lubricity and wear resistance of fluoroplastics reduce component wear and extend service life.
Wide temperature range adaptability
  • Wide temperature range adaptability
    01
    Fluoroplastic lining can withstand temperatures ranging from -50 ℃ to+200 ℃ (some materials such as PTFE can withstand temperatures up to 260 ℃), balancing low temperature toughness and high temperature stability.
Lightweight and easy maintenance
  • Lightweight and easy maintenance
    01
    The valve body is made of lightweight materials such as ductile iron, which reduces the weight by 20% -30% compared to traditional gate valves; Support online maintenance, seal replacement does not require dismantling the valve, reducing maintenance costs.
Sealing performance optimization
  • Sealing performance optimization
    01
    The gate adopts integral encapsulation technology or fluoroplastic sealing surface, combined with elastic sealing ring and O-ring valve stem sealing, to achieve airtight closure and effectively prevent medium leakage.
Low flow resistance structure design
  • Low flow resistance structure design
    01
    Retaining the full bore flow channel of traditional gate valves, the flat bottomed valve seat design avoids impurity accumulation, has low fluid resistance and fast shut-off speed, and reduces the risk of medium erosion on the sealing surface.
Fluoroplastic lining enhances corrosion resistance
  • Fluoroplastic lining enhances corrosion resistance
    01
    The inner wall and key components of the valve body are lined with fluoroplastics such as polytetrafluoroethylene (PTFE), which can resist corrosive media such as strong acids (sulfuric acid, hydrochloric acid, etc.), strong alkalis, organic solvents, etc. The chemical stability is better than that of ordinary metal valves.
Main Component Materials

Part Name

gray cast iron

carbon steel

stainless steel

Ultra low carbon stainless steel

Z

C

P

R

PL

RL

Valve body, valve stem, gate plate

HT250

WCB

CF8

CF8M

CF3

CF3M

Lining layer/valve seat

PCTFE (F3) PVDF (F2) FEP (F46) PFA (soluble polytetrafluoroethylene) PO (polyolefin)

valve stem

1Cr13

2Cr13

1Cr18Ni

1Cr18Ni12Mo2Ti

00Cr18Ni10

00Cr17Ni14Mo2

Packing and gasket

Flexible graphite PTFE (F4)

Middle flange bolt

35

35

1Cr17Ni2

1Cr17Ni2

1Cr18Ni9

1Cr18Ni9

Middle flange nut

45

45

0Cr18Ni9

0Cr18Ni9

0Cr18Ni9

OCr18Ni9

support

HT250 WCB CF8

stem nut

ZCuAl10Fe3 A439 D2

handwheel

KT330-08 WCC

Performance Specifications & Dimensions
  • Nominal pressure PN
    0.6/1.0/1.6/2.5/4.0/6.4
  • Shell F
    Px1.5
  • Sealing Pressure
    Px1.1
  • Medium
    Water, Steam, Oil
  • Temperature (℃)
    ≤200℃

Nominal Diameter

standard value

reference value

DN(mm)

NPS(in)

L

D

D1

D2

f

b

Z-Φd

D0

H1

H2

PN0.6MPa

15

1/2"

140

80

55

40

2

12

4-12

100

100

120

20

3/4"

152

90

65

50

2

14

4-12

100

120

140

25

1"

165

100

75

60

2

14

4-12

120

130

150

32

11/4"

178

120

90

70

2

16

4-14

120

156

185

40

11/2"

240

130

100

80

3

16

4-14

160

165

205

50

2"

250

140

110

90

3

16

4-14

160

350

400

65

21/2"

270

160

130

110

3

16

4-14

180

370

435

80

3"

280

185

150

125

3

18

4-18

180

430

510

100

4"

300

205

170

145

3

18

4-18

220

495

595

125

5"

325

235

200

175

3

20

8-18

220

610

735

150

6"

350

260

225

200

3

20

8-18

240

670

820

200

8"

400

315

280

255

3

22

8-18

240

815

1015

250

10"

450

370

335

310

3

24

12-18

240

965

1215

300

12"

500

435

395

362

4

24

12-23

280

1140

1440

350

14"

550

485

445

412

4

26

12-23

280

1275

1625

400

16"

600

535

495

462

4

28

16-23

320

1445

1845

450

18"

650

590

550

518

4

28

16-23

320

1530

1980

500

20"

700

640

600

568

4

30

16-23

360

1725

2225

Note: The pressure range is 0.6MPa~6.4MPa. The above data is for reference only. Please consult the company's sales department for details.

Valve Application
  • Oil & Gas Transportation

    Oil and gas transportation involves multiple modes such as pipelines and ships, and is the core link of the energy supply chain.

  • Chemical Raw Material Control

    The control of chemical raw materials covers the entire process of mining, storage, and production, ensuring safety and process stability.

  • High Temperature SteamPipeline in Power System

    High temperature steam pipelines are the core of energy transmission in power systems, supporting the efficient operation of thermal and nuclear power plants.

  • Other Industries

    Valves control fluids in multiple industries such as new energy and electronics, ensuring safe and efficient production.

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