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PTFE PFA Lining Butterfly Valve

The DA series lined butterfly valve is a high-performance control valve designed for various industrial pipeline systems, mainly used for regulating and cutting off the medium flow. It adopts advanced lining technology and structural design to meet the requirements of different working conditions and medium properties. The series includes two core types: half-lined type (model DA41F4/P) and fully lined type (models DA41F4, DA41F46), which are distinguished by the lining scope of key components.
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I. Product Introduction

The DA series lined butterfly valve is a high-performance control valve designed for various industrial pipeline systems, mainly used for regulating and cutting off the medium flow. It adopts advanced lining technology and structural design to meet the requirements of different working conditions and medium properties. The series includes two core types: half-lined type (model DA41F4/P) and fully lined type (models DA41F4, DA41F46), which are distinguished by the lining scope of key components.
For the half-lined type (DA41F4/P), the valve body is fully lined, while the butterfly plate and shaft are made of stainless steel without lining, balancing corrosion resistance and structural strength. The fully lined type (DA41F4, DA41F46) features full lining of the valve body, butterfly plate, and butterfly plate shaft; especially, the DA41F46 adopts an integrated structure of the butterfly plate and the shaft, further enhancing the stability and sealing performance of the valve during operation.
The DA series lined butterfly valve supports multiple operation modes, including manual, worm-gear rotation, pneumatic, and electric, to adapt to different automation levels and operation needs of the pipeline system. Its nominal pressure ranges from PN0.6 to 1.6 MPa, and the nominal diameter covers DN40 to 1200 mm, which can be widely applied in chemical, petroleum, pharmaceutical, food, water treatment and other industries, especially suitable for pipelines conveying corrosive media.

II. Product Features

1. Excellent Corrosion Resistance: The core advantage of the DA series lies in its high-quality lining design. The lining/seat of all models adopts corrosion-resistant materials such as F, PFA, and PTFE (packing material is PTFE), which can effectively resist the erosion of various strong corrosive media such as acids, alkalis, and salts. For the fully lined type, the full coverage of the lining ensures that the key flow-passing components are isolated from the medium, maximizing the corrosion resistance and extending the service life of the valve.
2. Diverse Structural Designs for Customized Needs: The series provides half-lined and fully lined options to match different medium corrosion degrees and use scenarios. The half-lined type (DA41F4/P) combines the corrosion resistance of the lined valve body with the high strength of the stainless steel butterfly plate and shaft, suitable for medium-corrosion working conditions; the fully lined type (DA41F4, DA41F46) is designed for strong-corrosion media, and the DA41F46’s integrated butterfly plate and shaft structure avoids potential leakage points caused by assembly, improving sealing reliability.
3. Wide Adaptability of Materials: The main components of the valve can be selected from a variety of materials according to actual needs, including gray iron (HT250), carbon steel (WCB), and stainless steel (CF8, CF8M). This material matching scheme enables the valve to adapt to different pressure levels, temperature ranges, and medium properties, greatly expanding its application scope.
4. Multiple Operation Modes: In addition to the basic manual operation, the series also supports worm-gear rotation, pneumatic, and electric operation modes. The worm-gear rotation mode improves the operation torque and is suitable for large-diameter valves; the pneumatic and electric modes realize automatic control, which can be integrated with the automatic control system of the factory, reducing manual intervention and improving the efficiency and accuracy of pipeline control.
5. Compliance with International Standards: The design, manufacturing, and testing of the valve fully comply with relevant national and international standards (such as GB/T, API, ASME, HG/T), ensuring the consistency of product quality and interchangeability of components. The standardized design also facilitates the maintenance and replacement of the valve in later use.
6. Reasonable Structural Size: The structural length of the valve adopts short-long series design, which is compatible with GB/T 12221 and API 609 standards; the flange size complies with HG/T 20592 and ASME B16.5 standards, ensuring that the valve can be seamlessly connected with various existing pipeline systems, reducing the difficulty of installation and transformation.

III. Technical Data

1. Basic Model Specifications
Operation Mode
Model
Lining Type
Manual
D41F/P
Half-lined
DA41F4
Fully lined
DA41F46
Fully lined
Worm-gear Rotation
D341F/P
Half-lined
DA341F4
Fully lined
DA341F46
Fully lined
Pneumatic
D641PFA
Half-lined
DA641F4
Fully lined
DA641F46
Fully lined
Electric
D941PFA
Half-lined
DA941F4
Fully lined
DA941F46
Fully lined
2. Nominal Parameters
  • Nominal Pressure: PN0.6 ~ 1.6 MPa
  • Nominal Diameter: DN40 ~ 1200 mm
3. Main Parts and Components Material
Serial Number
Part Name
Gray Iron
Carbon Steel
Stainless Steel (Z)
Stainless Steel (C)
Stainless Steel (P)
Stainless Steel (R)
1
Upper and Lower Valve Body
HT250
WCB
CF8
CF8
CF8
CF8M
2
Lining/Seat
F, PFA, F
F, PFA, F
F, PFA, F
F, PFA, F
F, PFA, F
F, PFA, F
3
Butterfly Plate/Stem
WCB
WCB
CF8
CF8
CF8
CF8M
4
Packing Gland
WCB
WCB
CF8
CF8
CF8
CF8M
5
Packing Material
PTFE
PTFE
PTFE
PTFE
PTFE
PTFE
4. Implementation Standards
  • Design and Manufacturing: GB/T 12238 (Median Line) / API 609
  • Structure Length: GB/T 12221 (Short-Long Series) / API 609
  • Flange Size: HG/T 20592 / ASME B16.5
  • Pressure Test: GB/T 13927 / API 598
  • Symbolize: GB/T 12220
  • Fill: JB/T 7928

Ⅳ．The main shape and connection size

Main connection dimensions and weight

 

Nominal diameter standard value reference point
DN
(mm)		 NPS
(inch)		 L D D1 D2 f b Z-Φd Do H W(kg)
PN0.6(MPa)
40 11/2 106 130 100 80 3 14 4-Φ14 160 140 10
50 2 108 140 110 90 3 14 4-Φ14 200 160 12
65 21/2 112 160 130 110 3 14 4-Φ14 250 160 13
80 3 114 190 150 128 3 16 4-Φ18 250 170 14
100 4 127 210 170 148 3 16 4-Φ18 300 180 16
125 5 140 240 200 178 3 18 8-Φ18 300 275 18
150 8 140 265 225 202 3 18 8-Φ18 200* 295 38
200 10 152 320 280 258 3 20 8-Φ18 200* 320 74
250 12 165/250 375 335 312 3 22 12-Φ18 240* 385 105
300 14 178/270 440 395 365 4 22 12-Φ22 240* 390 142
350 16 190/290 490 445 415 4 22 12-Φ22 240* 460 179
400 6 216/310 540 495 465 4 22 16-Φ22 280* 510 220
450 18 222/330 595 550 520 4 22 16-Φ22 280* 540 268
500 20 229/350 645 600 570 4 24 20-Φ22 320* 570 378
600 24 267/390 755 705 670 6 30 20-Φ26 320* 660 608
700 28 292/430 860 810 775 6 24 24-Φ26 360* 710 1050
800 32 318/470 975 920 880 6 24 24-Φ30 360* 780 1320
900 36 330/510 1075 1020 980 6 26 24-Φ30 380* 885 1795
1000 40 410/550 1175 1120 1080 6 26 28-Φ30 400* 990 1900
1200 48 470/630 1405 1340 1295 6 28 32-Φ33 400* 1170 2110
1400 56 390 1630 1560 1510 6 32 36-Φ36 450* 1365 –
1600 64 440 1830 1760 1710 6 34 40-Φ36 500* 1475 –
1800 72 490 2045 1970 1920 6 36 44-Φ39 550* 1515 –

 

Main connection dimensions and weight

 

Nominal diameter standard value reference point
DN
(mm)		 NPS
(inch)		 L D D1 D2 f b Z-Φd Do H W(kg)
PN1.0(MPa)
40 11/2 106 150 110 88 3 18 4-Φ18 160 140 10
50 2 108 165 125 102 3 18 4-Φ18 200 160 12
65 21/2 112 185 145 122 3 18 8-Φ18 250 165 13
80 3 114 200 160 138 3 20 8-Φ18 250 170 14
100 4 127 220 180 158 3 20 8-Φ18 300 180 16
125 5 140 250 210 188 3 22 8-Φ18 300 275 18
150 6 140 285 240 212 3 22 8-Φ22 200* 295 38
200 8 152 340 295 268 3 24 8-Φ22 200* 320 74
250 10 165/250 395 350 320 3 26 12-Φ22 240* 385 105
300 12 178/270 445 400 370 4 26 12-Φ22 240* 390 142
350 14 190/290 505 460 430 4 26 16-Φ22 240* 460 179
400 16 216/310 565 515 482 4 26 16-Φ26 280* 510 220
450 18 222/330 615 565 532 4 28 20-Φ26 280* 540 268
500 20 229/350 670 620 585 4 28 20-Φ26 320* 570 378
600 24 267/390 780 725 685 6 34 20-Φ30 320* 660 608
700 28 292/430 895 840 800 6 34 24-Φ30 360* 710 1050
800 32 318/470 1015 950 905 6 36 24-Φ33 360* 780 1320
900 36 330/510 1115 1050 1005 6 38 28-Φ33 380* 885 1795
1000 40 410/550 1230 1160 1110 6 38 28-Φ36 400* 990 1900
1200 48 470/630 1455 1380 1330 6 44 32-Φ39 400* 1200 2150
1400 56 390 1675 1590 1535 6 48 36-Φ42 450* 1365 –
1600 56 440 1915 1820 1760 6 52 40-Φ48 500* 1475 –

*Flange size PN1.0MPa, PN1.6MPa, DN65 The number of bolt holes adopts 4 holes, please note if you have other requirements.

 

Main connection dimensions and weight

 

Nominal diameter standard value reference point
DN
(mm)		 NPS
(inch)		 L D D1 D2 f b Z-Φd Do H W(kg)
PN1.6(MPa)
40 11/2 106 150 110 88 3 18 4-Φ18 160 140 10
50 2 108 165 125 102 3 18 4-Φ18 200 160 12
65 21/2 112 185 145 122 3 18 8-Φ18 250 165 13
80 3 114 200 160 138 3 20 8-Φ18 260 170 14
100 4 127 220 180 158 3 20 8-Φ18 300 180 16
125 5 140 250 210 188 3 22 8-Φ18 300 275 18
150 6 140 285 240 212 3 22 8-Φ22 200* 295 42
200 8 152 340 295 268 3 24 12-Φ22 200* 320 78
250 10 165/250 405 355 320 3 26 12-Φ26 240* 385 120
300 12 178/270 460 410 378 4 28 12-Φ26 240* 390 145
350 14 190/290 520 470 428 4 30 16-Φ26 240* 460 202
400 16 216/310 580 525 490 4 32 16-Φ30 280* 510 235
450 18 222/330 640 585 550 4 34* 20-Φ30 280* 540 368
500 20 229/350 715 650 610 4 34* 20-Φ33 320* 570 420
600 24 267/390 840 770 725 6 36* 20-Φ36 320* 660 750
700 28 292/430 910 840 795 6 42 24-Φ36 360* 710 1028
800 32 318/470 1025 950 900 6 42 24-Φ39 380* 780 1690
900 36 330/510 1125 1050 1000 6 44 28-Φ39 400* 885 1815
1000 40 410/550 1255 1170 1115 6 46 28-Φ42 500* 990 2050

 

Main connection dimensions and weight

 

Nominal diameter standard value reference point
DN
(mm)		 NPS
(inch)		 L D D1 D₂ f b Z-Φd Do H W(kg)
PN2.5(MPa)
40 11/2 106 150 110 88 3 18 4-Φ18 200 140 11
50 2 108 165 125 102 3 20 4-Φ18 200 160 13
65 21/2 112 185 145 122 3 22 8-Φ18 250 165 14
80 3 114 200 160 138 3 24 8-Φ18 250 170 16
100 4 127 235 190 162 3 24 8-Φ22 300 180 18
125 5 140 270 220 188 3 26 8-Φ26 300 275 20
150 6 140 300 250 218 3 28 8-Φ26 240* 295 48
200 8 152 360 310 278 3 30 12-Φ26 240* 320 88
250 10 165/250 425 370 335 3 32 12-Φ30 280* 385 145
300 12 178/270 485 430 395 4 34 16-Φ30 280* 390 157
350 14 190/290 555 490 450 4 38 16-Φ33 320* 460 222
400 16 216/310 620 550 505 4 40 16-Φ36 320* 510 353
450 18 222/330 670 600 555 4 46 20-Φ36 360* 540 405
500 20 229/350 730 660 615 4 48 20-Φ36 360* 570 448
600 24 267/390 845 770 720 6 48* 20-Φ39 380* 660 795

 

Main connection dimensions and weight

 

Nominal diameter standard value reference point
DN
(mm)		 NPS
(inch)		 L D D1 D₂ f b Z-Φd Do H W(kg)
Class 150Lb
80 3 114 190 152.5 127 3.5 24.3 4-Φ19 250 170 14
100 4 127 230 190.5 157.2 3.5 24.3 8-Φ19 300 180 16
125 5 140 255 215.9 185.7 3.5 24.3 8-Φ22 300 275 18
150 6 140 280 241.3 215.9 3.5 25.9 8-Φ22 200* 295 42
200 8 152 345 298.5 269.9 3.5 29 8-Φ22 200* 320 78
250 10 165 405 362 323.8 4 30.6 12-Φ25.4 240* 385 120
300 12 178 485 431.8 381 4 32.2 12-Φ25.4 240* 390 145
350 14 190 535 476.3 412.8 4 35.4 12-Φ28.6 280* 460 202
400 16 216 595 539.8 469.9 4 37 16-Φ28.6 280* 510 235
450 18 222 635 577.9 533.4 4 40.1 16-Φ31.8 320* 540 368
500 20 229 700 635 584.2 4 43.3 20-Φ31.8 320* 570 420
600 24 267 815 749.3 692.2 6 48.1 20-Φ34.9 360* 660 750

 

Main connection dimensions and weight

 

Nominal diameter standard value reference point
DN
(mm)		 NPS
(inch)		 L D D1 D₂ f b Z-Φd Do H W(kg)
Class 300Lb
80 3 180 210 168.3 127 3.5 29 8-Φ22.2 250 170 16
100 4 190 255 200 157.2 3.5 32.2 8-Φ22.2 300 180 18
125 5 200 280 235 185.7 3.5 35.4 8-Φ22.2 300 275 20
150 6 210 320 269.9 215.9 3.5 37 12-Φ22.2 240* 295 48
200 8 230 380 330.2 269.9 4 41.7 12-Φ25.4 240* 320 88
250 10 250 445 387.4 323.8 4 48.1 16-Φ28.6 280* 385 145
300 12 270 520 450.8 381 4.5 51.3 16-Φ31.8 280* 390 157
350 14 290 585 514.4 412.8 4.5 54.4 20-Φ31.8 320* 460 222
400 16 310 650 571.5 469.9 5 57.6 20-Φ34.9 320* 510 353
450 18 330 710 628.6 533.4 5 60.8 24-Φ34.9 360* 540 405
500 20 350 775 685.8 584.2 6 64 24-Φ34.9 360* 570 450
600 24 390 915 812.8 692.2 6 70.3 24-Φ41.3 360* 660 765
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Founded in 2016, Shanghai Wangye Valve Manufacturing Co., Ltd. is a professional industrial fluid control manufacturer with nearly a decade of experience, integrating R&D, intelligent production, sales, and customized solutions. Leveraging Shanghai’s advanced manufacturing advantages, we’ve built a reliable brand across petrochemicals, power, metallurgy, water treatment, and new energy industries, offering gate/ball/butterfly valves and tailored solutions for harsh conditions. Backed by advanced equipment, full-process quality control, and ISO certifications, we adhere to “Integrity, Quality, Customer Focus, Innovation” and provide comprehensive services, striving for long-term cooperation and continuous technological upgrading.

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