Product Details
FR Series Pneumatic Eccentric Control Valve
The FR series pneumatic eccentric rotary control valve (also known as the cam flexure valve) adopts Masoneilan technology combined with China's characteristics. It integrates the advantages of single-seat valves, ball valves, butterfly valves, etc., and has prominent features such as a simple structure, small size, light weight, large rated flow coefficient, wide adjustable range, wide operating temperature range, small leakage, and good stability.
Since the valve core and valve stem only perform rotational movement, the friction force they bear during operation is very small. When the valve core and valve seat are in contact and closed, the flexible arm of the valve core produces slight elastic deformation and elastic tension under the thrust of the actuator, making the contact between the valve core and the valve seat more tight and firm. Therefore, the leakage of the eccentric valve is very small. At the same time, the actuator thrust required to close the valve is smaller compared with ball valves and butterfly valves.
For these reasons, this series of products is widely used in industrial process automatic control systems such as chemical industry, metallurgy, and power plants.
| Structural Materials |
| Serial Number | Name | Material |
| 1 | Valve Body | WCB SCS13 SCS14 ZG25 ZGICr18Ni9 ZG0Cr18Ni12Mo2Ti |
| 2 | Lower Guide Bushing | 9Cr18 SUS316+ST |
| 3 | Valve Seat | 0Cr18Ni12Mo2Ti SUS316+ST |
| 4 | Valve Core | SUS316+ST |
| 5 | Gland Nut | 0Cr18Ni12Mo2Ti SUS316+ST |
| 6 | Upper Guide Bushing | 9Cr18 SUS316+ST |
| 7 | Valve Stem | 0Cr18Ni12Mo2Ti SUS316 |
| 8 | Gasket | 1Cr18Ni90Cr18Ni12Mo2Ti |
| 9 | Packing | Polytetrafluoroethylene (PTFE) + Asbestos, Graphite |
| 10 | Packing Bolt | 1Cr18Ni9 |
| 11 | Packing Gland | 1Cr18Ni9 |
| 12 | Pressure Plate | ZG25 ZG1Cr18Ni9 |
| 13 | Nut | 1Cr18Ni9 |

| 1. Basic technical parameters |
| Caliber | 1" | 1" 12 | 2" | 3" | 4" | 6" | 8" | 10" | 12" |
| Flow coefficient Cv | 14 | 30 | 50 | 135 | 230 | 500 | 850 | 1300 | 1750 |
| 8.4 | 18 | 30 | 81 | 138 | 300 | 510 | 780 | 1050 |
| 5.6 | 12 | 20 | 54 | 92 | 200 | 340 | 520 | 700 |
| Flow characteristic | Approximate value line (logarithmic linear and other characteristics must be equipped with a valve positioner) |
| Pressure class | ANSI150300600 |
| Stroke | Rotation angle 50° |
| Valve seat leakage | ANSI B16.104 Ⅳ (metal seal) Ⅵ (soft seal) |
| Operating temperature (℃) | -195~+400 |
| Turndown ratio | 100∶1 |
| Actuator | Rolling diaphragm type | DL1 | DL2 | DL3 |
| Pneumatic piston type | PL1 | PL2 | PL3 | PL4 |
| Connection form | Wafer type |

| 3. Structural materials |
| Serial Number | Name | Material |
| 1 | Valve Body | WCBSCS13SCS14ZG25ZGlCr18Ni9ZG0Cr18Ni12Mo2Ti |
| 2 | Lower Guide Bushing | 9Cr18SUS316+ST |
| 3 | Valve Seat | 0Cr18Ni12Mo2TiSUS316+ST |
| 4 | Valve Core | SUS316+ST |
| 5 | Gland Nut | 0Cr18Ni12Mo2TiSUS316+ST |
| 6 | Upper Guide Bushing | 9Cr18SUS316+ST |
| 7 | Valve Stem | 0Cr18Ni12Mo2TiSUS316 |
| 8 | Gasket | 1Cr18Ni90Cr18Ni12Mo2Ti |
| 9 | Packing | Polytetrafluoroethylene + asbestos graphite |
| 10 | Packing bolt | 1Cr18Ni9 |
| 11 | Packing gland | 1Cr18Ni9 |
| 12 | Pressure plate | ZG25ZG1Cr18Ni9 |
| 13 | Nut | 1Cr18Ni9 |


4. Allowable pressure difference
| (1) Hard seal structure Unit: MPa |
| Caliber | Cv | Air-to-open and flow-opening type | Air-to-open and flow-closing type or air-to-close and flow-opening type |
| Air supply pressure |
| 0.14 | 0.18 | 0.21 | 0.25 | 0.28 | 0.32 | 0.35 | 0.39 | 0.42 | 0.46 | 0.49 | 0.53 |
| 1" | 14 5.6 | 7.0 10.2 | 7.0 10.0 | | | | | | | | | | | |
" 1 1 2 | 30 12 | 4.7 9.8 | 3.0 6.3 | 5.6 10.2 | | | | | | | | | | |
| 2" | 50 20 | 2.5 5.2 | 1.6 3.3 | 3.5 7.0 | 4.2 7.0 | | | | | | | | | |
| 3" | 135 54 | 2.0 4.5 | 1.3 2.8 | 2.7 6.1 | 4.2 7.0 | | | | | | | | | |
| 4" | 230 92 | 1.0 2.2 | 0.63 1.4 | 1.4 3.0 | 2.2 4.9 | 3.1 6.8 | 3.9 7.0 | 4.1 7.0 | | | | | | |
| 6" | 500 | 0.63 | | | 0.35 0.35 0.35 | 0.91 0.91 0.91 | 1.4 1.4 1.4 | 2.1 2.1 2.1 | 2.5 2.5 | 3.1 3.1 | 3.7 3.7 | 4.2 4.2 | | |
| 200 | 1.4 | | | 0.77 0.77 0.77 | 2.0 2.0 2.0 | 3.2 3.2 3.2 | 4.4 4.4 3.5 | 5.6 5.6 | 6.8 6.8 | 7.0 7.0 | | | |
| | 850 | 0.32 | | | 0.18 0.18 0.18 | 0.42 0.42 0.42 | 0.7 0.7 0.63 | 1.0 1.0 | 1.3 1.3 | 1.5 | 1.8 | 2.1 | 2.4 | 2.5 |
| 8" | 510 | 0.49 | | | 0.28 0.28 0.28 | 0.7 0.7 0.7 | 1.1 1.1 1.0 | 1.5 1.5 | 2.0 2.0 | 2.4 | 2.8 | 3.2 | 3.7 | 3.9 |
| | 340 | 0.77 | | | 0.42 0.42 0.42 | 1.1 1.1 1.0 | 1.8 1.8 1.5 | 2.5 2.5 | 3.2 3.2 | 3.9 | 4.5 | 5.2 | 5.9 | 6.3 |
| 10" | 1300 | 0.18 | | | 0.11 0.11 0.11 | 0.25 0.25 0.25 | 0.38 0.35 0.38 | 0.56 0.56 | 0.7 0.7 | 0.84 | 0.98 | 1.1 | 1.3 | 1.5 |
| 780 | 0.42 | | | 0.14 0.14 0.14 | 0.35 0.35 0.35 | 0.56 0.56 0.49 | 0.84 0.84 | 1.1 1.1 | 1.3 | 1.5 | 1.8 | 2 | 2.2 |
| 520 | 0.42 | | | 0.25 0.25 0.25 | 0.63 0.63 0.63 | 0.98 0.98 0.84 | 1.3 1.3 | 1.7 1.7 | 2.1 | 2.5 | 2.8 | 3.2 | 3.6 |
| | 1750 | 0.11 | | | | 0.14 0.14 0.14 | 0.21 0.21 0.621 | 0.32 0.32 | 0.39 0.39 | 0.49 0.42 | 0.56 | 0.63 | 0.7 | 0.84 |
| 12" | 1050 | 0.14 | | | 0.07 0.07 0.07 | 0.21 0.21 0.21 | 0.35 0.35 0.32 | 0.49 0.49 | 0.63 0.63 | 0.7 | 0.84 | 0.98 | 1.1 | 1.3 |
| | 700 | 0.25 | | | 0.14 0.14 0.14 | 0.35 0.35 0.35 | 0.56 0.56 0.49 | 0.77 0.77 | 0.98 0.98 | 1.3 | 1.5 | 1.7 | 1.9 | 2.1 |
| (2) Soft seal structure Unit: MPa |
| Caliber | Cv | Air-to-open and flow-opening type | Air-to-open and flow-closing type or air-to-close and flow-opening type |
| Air supply pressure |
| 0.14 | 0.18 | 0.21 | 0.25 | 0.28 | 0.32 | 0.35 | 0.39 | 0.42 | 0.46 | 0.49 | 0.53 |
| 1" | 14 5.6 | 5.6 7.0 | 5.6 7.0 | | | | | | | | | | | |
" 1 1 2 | 30 12 | 3.5 7.0 | 1.6 3.7 | 4.9 7.0 | | | | | | | | | | |
| 2" | 50 20 | 1.8 3.7 | 0.7 1.6 | 2.6 5.3 | 4.2 7.0 | | | | | | | | | |
| 3" | 135 54 | 1.4 3.4 | 0.62 1.6 | 2.1 4.8 | 3.5 5.6 | | | | | | | | | |
| 4" | 230 92 | 0.7 1.6 | 0.25 0.7 | 1.1 2.3 | 1.8 4.0 | 2.6 5.6 | 3.4 5.6 | 3.5 5.6 | | | | | | |
| 6" | 500 | 0.42 | | | 0.14 0.14 0.14 | 0.63 0.63 0.63 | 1.2 1.2 1.2 | 1.7 1.7 1.7 | 2.2 2.2 2.5 | 2.7 2.7 | 3.2 3.2 | 3.5 3.5 | | |
| 200 | 1.1 | | | 0.42 0.42 0.42 | 1.5 1.5 1.5 | 2.7 2.7 2.7 | 3.7 3.7 3.7 | 4.8 4.8 | 5.6 5.6 | | | | |
| | 850 | 0.14 | | | | 0.28 0.28 0.28 | 0.52 0.52 0.52 | 0.77 0.77 0.63 | 1.1 1.1 | 1.3 1.3 | 1.5 | 1.8 | 2.1 | |
| 8" | 510 | 0.28 | | | 0.07 0.07 0.07 | 0.46 0.46 0.46 | 0.84 0.84 0.84 | 1.2 1.2 0.96 | 1.6 1.6 | 2.0 2.0 | 2.4 | 2.8 | 3.2 | |
| | 340 | 0.49 | | | 0.14 0.14 0.14 | 0.77 0.77 0.77 | 1.4 1.4 1.4 | 2.0 2.0 1.5 | 2.6 2.6 | 3.2 3.2 | 3.8 | 4.4 | 4.9 | |
| 10" | 1300 | | | | | 0.11 0.11 0.11 | 0.25 0.25 0.25 | 0.38 0.38 0.35 | 0.53 0.53 | 0.67 0.67 | 0.77 0.70 | 0.91 | 1.1 | 1.2 |
| 780 | 1.1 | | | | 0.21 0.21 0.21 | 0.42 0.42 0.42 | 0.63 0.63 0.63 | 0.84 0.84 | 1.1 1.1 | 1.3 | 1.5 | 1.7 | 1.9 |
| 520 | 0.21 | | | | 0.35 0.35 0.35 | 0.7 0.7 0.7 | 1.1 1.1 0.84 | 1.3 1.3 | 1.7 1.7 | 2 | 2.3 | 2.7 | 3 |
| | 1750 | | | | | 0.04 0.04 0.04 | 0.11 0.11 0.11 | 0.18 0.18 0.18 | 0.28 0.28 0.21 | 0.35 0.35 | 0.42 0.42 | 0.49 | 0.6 | 0.67 |
| 12" | 1050 | | | | | 0.07 0.07 0.07 | 0.21 0.21 0.21 | 0.32 0.32 0.32 | 0.46 0.46 | 0.56 0.56 | 0.7 | 0.77 | 0.91 | 1.1 |
| | 700 | 0.07 | | | | 0.18 0.18 0.18 | 0.35 0.35 0.35 | 0.56 0.56 0.56 | 0.77 0.77 | 0.91 0.91 | 1.1 0.90 | 1.3 | 1.5 | 1.8 |
| Note: - If the allowable pressure difference exceeds the value in the table, it is recommended to use a piston-type actuator.
- If the Cv value is greater than 500, it is recommended to use a piston-type actuator.
- The allowable pressure difference shall not exceed the nominal pressure of the valve.
|
Accessories
Since the flow characteristic of the FR series pneumatic eccentric rotary control valve is approximately linear, a valve positioner (including an air filter pressure reducer) must be equipped in occasions where control accuracy is required. In addition, auxiliary components such as electro-pneumatic converters, position retaining valves, safety valves, travel switches, and solenoid valves can also be equipped according to process requirements.
The handwheel of the FR series is integrated with the valve, and it can be supplied without special indication when the user places an order.
External dimensions and weight

| Equipped with a rolling diaphragm actuator Unit: mm |
| DN | A | B | C | D | E | F | G | H | J | K | L | weight (Kg) |
| Flangeless | Flangeless |
| 1" | 102 | 173 | 297 | 208 | 163 | 140 | 110 | 67 | 206 | 38 | 137 | 12 |
| ” | 114 | 175 | 300 | 211 | 163 | 140 | 110 | 62 | 234 | 51 | 165 | 14 |
| 2" | 124 | 175 | 300 | 211 | 163 | 140 | 110 | 62 | 239 | 66 | 170 | 16 |
| 3" | 165 | 262 | 434 | 229 | 163 | 175 | 118 | 97 | 333 | 84 | 244 | 35 |
| 4" | 194 | 264 | 437 | 229 | 163 | 175 | 118 | 106.5 | 356 | 109 | 267 | 48 |
| 6" | 229 | 330 | 533 | 302 | 254 | 218 | 197 | 127 | 432 | 147 | 323 | 86 |
| 8" | 243 | 333 | 536 | 305 | 254 | 218 | 197 | 147 | 470 | 203 | 361 | 127 |
| 10" | 297 | 335 | 538 | 310 | 254 | 218 | 197 | 167 | 547 | 251 | 465 | 156 |
| 12" | 338 | 338 | 541 | 312 | 254 | 218 | 197 | 184 | 610 | 277 | 500 | 184 |
| Equipped with a piston-type actuator Unit: mm |
| DN | A | B | C | D | E | F | G | H | J | K | L | weight (Kg) |
| Flangeless | Flangeless |
| 6" | 229 | 330 | 677 | 302 | 254 | 271 | 213 | 127 | 432 | 147 | 297 | 194 |
| 8" | 243 | 333 | 680 | 305 | 254 | 271 | 216 | 147.5 | 470 | 203 | 335 | 236 |
| 10" | 297 | 335 | 683 | 310 | 254 | 271 | 221 | 167 | 574 | 251 | 440 | 263 |
| 12" | 338 | 338 | 686 | 312 | 254 | 271 | 224 | 184 | 610 | 277 | 475 | 290 |
| JB | PN1.6 | PN4.0 | PN6.4 |
| Specification Diameter | M×L | b | Number of Bolts | Number of Nuts | M×L | b | Number of Bolts | Number of Nuts | M×L | b | Number of Bolts | Number of Nuts |
| 25 | M12×170 | 30 | 4 | 8 | M12×175 | 35 | 4 | 8 | M16×195 | 35 | 4 | 8 |
| 40 | M16×190 | 35 | 4 | 8 | M16×200 | 35 | 4 | 8 | M20×215 | 40 | 4 | 8 |
| 50 | M16×210 | 35 | 4 | 8 | M16×215 | 35 | 4 | 8 | M20×230 | 40 | 4 | 8 |
| 80 | M16×250 M16×85* | 3525 | 4 | 8 | M16×260 M16×90* | 4030 | 72 | 142 | M20×280 M20×100* | 4035 | 72 | 142 |
| 100 | M16×280 M16×95* | 4030 | 7 2 | 142 | M20×300 M20×105* | 4035 | 72 | 142 | M22×315 M22×115* | 4535 | 72 | 142 |
| 150 | M20×330 M20×90* | 4035 | 72 | 142 | M22×350 M22×100* | 4540 | 72 | 142 | M30×380 M30×115* | 5045 | 72 | 142 |
| 200 | M20×350 M20×100* | 4040 | 104 | 204 | M27×390 M27×115* | 4545 | 104 | 204 | M30×410 M30×125* | 5045 | 104 | 204 |
| 250 | M22×420 M22×105* | 4040 | 88 | 168 | M30×455 M30×120* | 4545 | 88 | 168 | M36×480 M36×135* | 5050 | 88 | 168 |
| 300 | M22×460 M22×105* | 4540 | 88 | 168 | M30×500 M30×130* | 4545 | 128 | 248 | M36×530 M36×145* | 5050 | 128 | 248 |
| Note: Items marked with "*" are short double-ended studs. |
| b represents the thread length of the double-ended stud |
| JB | PN2.5 | | |
| Specification Diameter | M×L | b | Number of Bolts | Number of Nuts | | | | | | | | |
| 25 | M12×170 | 30 | 4 | 8 | | | | | | | | |
| 40 | M16×195 | 35 | 4 | 8 | | | | | | | | |
| 50 | M16×210 | 35 | 4 | 8 | | | | | | | | |
| 80 | M16×255 M16×90* | 35 30 | 7 2 | 14 2 | | | | | | | | |
| 100 | M20×295 M20×105* | 40 30 | 7 2 | 14 2 | | | | | | | | |
| 150 | M22×345 M22×90* | 40 35 | 7 2 | 14 2 | | | | | | | | |
| 200 | M22×370 M22×100* | 40 40 | 10 4 | 20 4 | | | | | | | | |
| 250 | M27×435 M27×105* | 40 40 | 8 8 | 16 8 | | | | | | | | |
| 300 | M27×475 M27×110* | 45 40 | 12 8 | 24 8 | | | | | | | | |
| List of Bolts and Nuts for Globe Valve-Pipeline Connection |
| ANSI | 150# | 300# | 600# |
| Specification Diameter | M×L | b | Number of Bolts | Number of Nuts | M×L | b | Number of Bolts | Number of Nuts | M×L | b | Number of Bolts | Number of Nuts |
| 25 | M14×185 | 30 | 4 | 8 | M16×195 | 35 | 4 | 8 | M18×210 | 40 | 4 | 8 |
| 40 | M14×200 | 30 | 4 | 8 | M20×225 | 40 | 4 | 8 | M20×235 | 40 | 4 | 8 |
| 50 | M16×225 | 35 | 4 | 8 | M16×230 M16×95* | 40 | 7 2 | 14 2 | M18×250 M18×105* | 40 | 7 2 | 14 2 |
| 80 | M18×270 | 35 | 4 | 8 | M20×305 M20×130* | 40 | 7 2 | 14 2 | M20×310 M20×140* | 40 | 7 2 | 14 2 |
| 100 | M18×295 M18×105* | 40 | 7 2 | 14 2 | M20×320 M20×135* | 40 | 7 2 | 14 2 | M22×355 M22×150* | 45 | 7 2 | 14 2 |
| 150 | M20×355 M20×120* | 40 | 7 2 | 14 2 | M20×365 M20×150* | 45 | 11 2 | 22 2 | M27×420 M27×170* | 50 | 11 2 | 22 2 |
| 200 | M20×365 M20×105* | 40 | 6 4 | 12 4 | M24×405 M24×125* | 50 45 | 10 4 | 20 4 | M30×460 M30×150* | 55 45 | 10 4 | 20 4 |
| 250 | M22×425 M22×110* | 40 | 8 8 | 16 8 | M27×475 M27×130* | 50 45 | 12 8 | 24 8 | M33×535 M33×165* | 65 45 | 12 8 | 24 8 |
| 300 | M22×470 M22×110* | 45 | 8 8 | 16 8 | M30×525 M30×140* | 65 45 | 12 8 | 24 8 | M33×580 M33×165* | 65 50 | 16 8 | 32 8 |
| Note: The item marked with "*" is a short double-ended stud. |
Company Profile
High-End Die-Shanghai WEYO Automation Technology Co., Ltd. was established in
2021 and is headquartered in Shanghai. It is an innovative
technology enterprise that specializes in high-end industrial
automation equipment, core components supply, technical services,
and solution provision. With the core philosophy of "Technology
Drives Efficiency, Service Creates Value," WEYO is dedicated to
offering high-performance die-casting equipment, precision
components, and intelligent system integration services to global
manufacturing clients, helping them achieve optimized production
processes and upgrades.