RESILIENT SEATED · WAFER
D671X
Pneumatic Wafer Resilient-Seated Butterfly Valve
Automated isolation. Final configuration is selected against the actual medium, temperature, pressure, materials and control requirements.
KEY SPECIFICATIONS
Confirmed product definition
ModelD671X
Sealing / familyResilient seated
ConnectionWafer
ActuationPneumatic
Size rangeDN50–2000
Pressure rangePN0.6 / 1.0 / 1.6 MPa
TemperatureDepends on seat compound; see data/dimensions/d671x-seat-temperature.csv
MediaAir, water, wastewater, steam, gas and oils; exact seat/material compatibility review required
PRODUCT OVERVIEW
Built around the stated duty
D671X is a wafer butterfly valve with pneumatic operation. Automated isolation.
The final order configuration is confirmed against project conditions and approved technical documents.
SELECTION NOTES
Information to confirm
- Medium and operating temperature
- DN, pressure class and flange or end standard
- Body, disc, stem and seat materials
- On/off or modulating duty and required fail position
- Quantity, documentation and delivery requirements
MATERIALS
Material options
BodyDuctile iron, cast steel, alloy steel, stainless steel
DiscGrey cast iron, ductile iron, cast steel, stainless steel and special materials
Seat / sealing pairRubber compounds and PTFE; source contains a separate material/temperature table
Stem2Cr13, stainless steel
STRUCTURE
Construction details
DIMENSIONS
Dimension and connection drawings
Use the approved order drawing for final installation.
TECHNICAL DATA
Specifications and dimensions
Final dimensions and configuration must follow the approved order drawing.
Technical Specifications
| Model | D671X |
|---|---|
| Nominal diameter | DN50–2000 |
| Nominal pressure | PN0.6 / 1.0 / 1.6 MPa |
| Shell test pressure | 0.9 / 1.5 / 2.4 MPa |
| Seat test pressure | 0.66 / 1.1 / 1.76 MPa |
| Air seat test | 0.6 / 0.6 / 0.6 MPa |
| Connection | Wafer |
| Actuation | Pneumatic |
| Sealing | Resilient seated |
| Suitable media | Air, Water, Wastewater, Steam, Gas, Oil and other available options |
Materials / Performance Data
| Body | Ductile iron, Cast steel, Alloy steel, Stainless steel |
|---|---|
| Disc | Grey cast iron, Ductile iron, Cast steel, Stainless steel and Special materials |
| Seal ring | Rubber compounds, PTFE |
| Stem | 2Cr13, Stainless steel |
| Packing | O typeRing, Flexible graphite |
Dimensions and Connection Data 1
| Neoprene | CR | X or J | 0~+80°C |
|---|---|---|---|
| NBR | NBR | XA or JA | -20~+82°C |
| EPDM | EPDM | XB or JB | -40~+125°C |
| PTFE | PTFE | F or XC, JC | -30~+150°C |
| Silicone rubber | SI | XD or JD | -70~+150°C |
| FKM | VITON | XE or JE | -23~+150°C |
| Natural rubber | NR | X1 | -20~+85°C |
| Nylon | PA | N | -30~+93°C |
Dimensions and Connection Data 2
| DN | L | H | H0 | A | B |
|---|---|---|---|---|---|
| 50 | 43 | 63 | 315 | 180 | 65 |
| 65 | 46 | 70 | 330 | 180 | 65 |
| 80 | 46 | 83 | 390 | 245 | 72 |
| 100 | 52 | 105 | 431 | 240 | 72 |
| 125 | 56 | 115 | 455 | 240 | 72 |
| 150 | 56 | 137 | 626 | 350 | 93 |
| 200 | 60 | 164 | 720 | 350 | 93 |
| 250 | 68 | 206 | 800 | 550 | 350 |
| 300 | 78 | 230 | 860 | 600 | 350 |
| 350 | 78 | 248 | 883 | 600 | 350 |
| 400 | 102 | 289 | 972 | 600 | 350 |
| 450 | 114 | 320 | 1043 | 750 | 380 |
| 500 | 127 | 343 | 1098 | 750 | 380 |
| 600 | 154 | 413 | 1236 | 750 | 380 |
| 700 | 165 | 478 | 1431 | 750 | 380 |
| 800 | 190 | 525 | 1488 | 750 | 380 |
| 900 | 203 | 620 | 1615 | 1250 | 380 |
| 1000 | 216 | 725 | 1765 | 1500 | 580 |
| 1200 | 254 | 780 | 1976 | 1500 | 580 |
Dimensions and Connection Data 3
| DN | PN0.6 D0 | PN0.6 n-Φd | PN1.0 D0 | PN1.0 n-Φd | PN1.6 D0 | PN1.6 n-Φd |
|---|---|---|---|---|---|---|
| 50 | 110 | 4-14 | 125 | 4-18 | 125 | 4-18 |
| 65 | 130 | 4-14 | 145 | 4-18 | 145 | 4-18 |
| 80 | 150 | 4-18 | 160 | 8-18 | 160 | 8-18 |
| 100 | 170 | 4-18 | 180 | 8-18 | 180 | 8-18 |
| 125 | 200 | 8-18 | 210 | 8-18 | 210 | 8-18 |
| 150 | 225 | 8-18 | 240 | 8-22 | 240 | 8-22 |
| 200 | 280 | 8-18 | 295 | 8-22 | 295 | 8-22 |
| 250 | 335 | 12-18 | 350 | 12-22 | 355 | 12-26 |
| 300 | 395 | 12-22 | 400 | 12-22 | 410 | 12-26 |
| 350 | 445 | 12-22 | 460 | 16-22 | 470 | 16-26 |
| 400 | 495 | 16-22 | 515 | 16-26 | 525 | 16-30 |
| 450 | 550 | 16-22 | 565 | 20-26 | 585 | 20-30 |
| 500 | 600 | 20-22 | 620 | 20-26 | 650 | 20-33 |
| 600 | 705 | 20-26 | 725 | 20-30 | 770 | 20-36 |
| 700 | 810 | 24-26 | 840 | 24-30 | 840 | 24-36 |
| 800 | 920 | 24-30 | 950 | 24-33 | 950 | 24-39 |
| 900 | 1020 | 24-30 | 1050 | 28-33 | 1050 | 28-39 |
| 1000 | 1120 | 28-30 | 1160 | 28-36 | 1170 | 28-42 |
| 1200 | 1340 | 32-33 | 1380 | 32-39 | 1390 | 32-48 |
APPLICATIONS
Use only after duty review
Automated isolation. Media compatibility, temperature limits and actuation details must match the selected configuration.
D671X INQUIRY