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

Key Advantages

Technical Specifications

Materials of Main Parts

Applicable Media

Principal Dimensions (mm) & Weight — PN10 / PN16

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

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