D971X Electric Wafer Butterfly Valve
• Models: D971X-10/10Q/10C (PN10) and D971X-16/16Q/16C (PN16) — electric actuated
• Size range DN50–DN500, electric actuator for remote on/off control & PLC integration
• Body in gray cast iron, ductile iron, or WCB cast steel; Buna-N rubber seat
• 2Cr13 SS stem, ductile iron disc, aluminium bronze bushings
• Rated for water, steam, oil, weak acid and alkali up to 135 °C
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产品详情
Model: D971X Series | Pressure: PN10 / PN16 | Connection: Wafer | Medium: Water, Steam, Oil, Acid
Gaoshan Valve — D971X Electric Wafer Butterfly Valve
Centerline wafer butterfly valve with electric actuator, available in six body/pressure variants for water, steam, petroleum, and mild chemical service up to 135 °C.
Product Overview
The D971X electric wafer butterfly valve combines the proven centerline-disc design of the D71X family with a compact electric actuator, enabling remote on/off control, PLC integration, and automated process sequencing. Six standard variants cover PN10 and PN16 pressure classes with three body material options — gray cast iron (standard), ductile cast iron (intermediate duty), and WCB cast steel (high-pressure service). The Buna-N (NBR) elastomer lining provides reliable bi-directional shutoff against steam, water, petroleum products, weak acids, and alkalis. The electric actuator accepts standard 220 V / 380 V / 24 V DC supply voltages and integrates seamlessly with building management systems, water treatment SCADA, and industrial automation networks. With a compact overall height and a lightweight disc design, the D971X is ideal for remote-operated water distribution, fire protection, HVAC, and process isolation applications.
Model Designation Guide
| Model | Nominal Pressure | Body Material | Typical Application |
|---|---|---|---|
| D971X-10 | PN10 | Gray Cast Iron (HT200) | Water distribution, HVAC remote control |
| D971X-10Q | PN10 | Ductile Cast Iron (QT450) | Elevated mechanical duty, PN10 automation |
| D971X-10C | PN10 | WCB Cast Steel | Steam, petroleum, mild chemical remote control |
| D971X-16 | PN16 | Gray Cast Iron (HT200) | Higher-pressure water automation, PN16 |
| D971X-16Q | PN16 | Ductile Cast Iron (QT450) | Higher-duty automated service, PN16 |
| D971X-16C | PN16 | WCB Cast Steel | Steam, petroleum, chemicals, PN16 automation |
Key Advantages
Technical Specifications
| Parameter | PN10 Models | PN16 Models |
|---|---|---|
| Nominal Pressure (PN) | 10 bar (1.0 MPa) | 16 bar (1.6 MPa) |
| Shell Test Pressure | 1.5 MPa | 2.4 MPa |
| Seal Test Pressure | 1.1 MPa | 1.8 MPa |
| Working Temperature | ≤ 135 °C | |
| Size Range | DN50 – DN500 | |
| End Connection | Wafer (centerline, between-flange) | |
| Disc Type | Centerline disc | |
| Operation | Electric actuator (standard); manual override handwheel included | |
| Power Supply | 220 V AC / 380 V AC / 24 V DC (specify when ordering) | |
| Applicable Medium | Steam, water, petroleum, weak acid, alkali | |
| Design Standard | GB/T 13927 (pressure test); GB/T 12238 (face-to-face) | |
Materials of Main Parts
| Component | D971X-10 / -16 | D971X-10Q / -16Q | D971X-10C / -16C |
|---|---|---|---|
| Body | Gray Cast Iron (HT200) | Ductile Cast Iron (QT450-10) | WCB Cast Steel |
| Seat Ring | Buna-N Rubber (NBR) | ||
| Stem / Worm | 2Cr13 Stainless Steel | ||
| Disc | Ductile Cast Iron (QT450-10) | ||
| Axis Guide / Bushing | Aluminium Bronze | ||
| O-Ring Sealing | Buna-N Rubber (NBR) | ||
Applicable Media
Water
Seawater
Petroleum
Fuel Oil
Weak Acid
Alkali Solutions
HVAC Hot/Chilled Water
Fire Protection Water
Sewage / Wastewater
Principal Dimensions (mm) & Weight — PN10 / PN16
| Dim. | DN50 | DN65 | DN80 | DN100 | DN125 | DN150 | DN200 | DN250 | DN300 | DN350 | DN400 | DN450 | DN500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| H1 | 68 | 82 | 85 | 105 | 128 | 138 | 175 | 205 | 245 | 265 | 295 | 326 | 345 |
| H2 | 118 | 140 | 150 | 180 | 200 | 210 | 245 | 280 | 320 | 340 | 380 | 420 | 460 |
| H3 | 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255 | 302 | 302 | 302 |
| L | 43 | 46 | 46 | 52 | 56 | 56 | 60 | 68 | 78 | 78 | 102 | 114 | 127 |
| L1 | 126 | 126 | 126 | 126 | 126 | 126 | 126 | 126 | 126 | 126 | 175 | 175 | 175 |
| Wt. (kg) | 20 | 21 | 23 | 26 | 27 | 31 | 39 | 55 | 89 | 92 | 171 | 189 | 219 |
Dimensions legend: H1 = centerline to top of actuator; H2 = centerline to handwheel; H3 = actuator offset; L = face-to-face length; L1 = actuator length. All values in mm. PN10 and PN16 share identical face-to-face dimensions. Weights include valve body, disc, and fully assembled electric actuator.
Gaoshan Butterfly Valve Series — Quick Comparison
| Feature | D71X Lever | D371X Gear | D671X Pneumatic | D971X Electric |
|---|---|---|---|---|
| Operation | Manual Lever | Worm Gear | Pneumatic | Electric Motor |
| Size Range | DN40–DN200 | DN50–DN500 | DN50–DN500 | DN50–DN500 |
| Remote Control | ✗ None | ✗ None | ✓ Air signal | ✓ PLC / DCS / SCADA |
| Utility Required | None | None | Compressed air | Electricity |
| Fail Position | N/A | N/A | Fail-close / fail-open | Fail-last (standard) |
| Best For | Infrequent manual | Frequent manual, large bore | High-speed, ESD safety | Remote automation |
Product Structure Diagram
Quality Assurance & Testing
Every D971X electric butterfly valve undergoes the following factory acceptance tests before shipment:
- Shell Pressure Test — hydrostatic test at 1.5×PN to verify body integrity.
- Seat Leakage Test — air or water test at rated pressure; zero seat leakage required per GB/T 13927 Class VI.
- Electric Actuator Function Test — full open/close cycle with torque and limit-switch verification under load.
- Insulation Resistance Test — electrical integrity of motor windings and terminal box checked per manufacturer specification.
- Dimensional Inspection — face-to-face, flange bolt-circle, and bore dimensions checked against GB/T 12238.
- Visual & NDT — casting surfaces inspected; critical welds (cast steel models) subject to dye-penetrant examination.
Installation & Maintenance Notes
- Orientation: D971X valves can be installed in any pipe orientation. Ensure adequate clearance above the actuator for cable entry and manual override handwheel access.
- Electrical connection: Connect power supply via the actuator terminal box per the wiring diagram. Verify voltage and phase before energising. Install an external isolator switch within sight of the valve.
- Flange bolts: Use through-bolts to clamp both pipe flanges together through the wafer body. Tighten in a cross pattern.
- Manual override: The electric actuator includes a declutchable manual handwheel for emergency operation during power loss.
- Rubber seat inspection: Inspect the NBR seat annually or after prolonged steam service. Replace if cracking, swelling, or permanent deformation is observed.
- Actuator maintenance: Check actuator lubricant and torque calibration every 12 months or 1,000 cycles, whichever comes first.
Ordering Information
| Item | Specify When Ordering |
|---|---|
| Model | D971X-10 / 10Q / 10C / 16 / 16Q / 16C |
| Nominal Size | DN50 – DN500 |
| Power Supply | 220 V AC (standard); 380 V AC; 24 V DC (on request) |
| Control Signal | On/off (standard); modulating (4–20 mA) on request |
| Explosion-Proof Rating | Standard (non-Ex); Ex d IIBT4 on request |
| Flange Drilling Standard | GB/T 17241 (standard); ANSI / DIN on request |
| Seat Material | NBR (standard); EPDM / PTFE-lined on request |
| Disc Coating | Standard ductile iron; nickel-plated or SS disc on request |
Request a Quote or Technical Support
Gaoshan Valve supplies D971X electric wafer butterfly valves with certified inspection reports and actuator documentation. Fast delivery for standard sizes; explosion-proof and modulating configurations available on request. Contact our team for pricing, wiring diagrams, and application guidance.
