Product Overview
MD9B41F - 16C Coal Mine Explosion-Proof Electric Butterfly Valve features both general explosion-proof type and coal mine explosion-proof (Coal Safety MA grade) products. With a explosion-proof grade of BT4, it offers stable and reliable quality, exceptional explosion-proof performance, and can be used in various explosion-proof environments, including coal mine surface and non-mining working areas. Its MA grade coal safety products are widely applicable in flammable and explosive locations such as swamp gas, coal gas environments, and coal mines.
Product Features
Technical Specifications
| Project | Details |
|---|---|
| Protection Grade | ExDII BT4 |
| Applicable Pipeline Environment | Explosive gas or underground coal mining face |
| Explosion-proof voltage | Three-phase 660V, 380V; single-phase 220V |
| Product Type | In addition to the standard switch types, we also offer integrated explosion-proof models and smart integrated explosion-proof models. |
| Series Model | D9B41 (3)/D9B71 (3) Series |
| Performance Standards | Complies with JB/T8528 - 1997 Technical Conditions for Electric Actuators of General Valves; Explosion-proof models conform to GB3836.1 - 2000 General Requirements for Electrical Equipment Used in Explosive Gas Environments, Part 1, GB3836.2 - 2000 Electrical Equipment Used in Explosive Gas Environments, Part 2: Explosion-proof "d" and JB/T8529 - 1997 Technical Conditions for Explosion-proof Electric Actuators of Valves. |
| Explosion-proof category | dI and dIIBT4 types, dI is suitable for non-mining areas in coal mines; dIIBT4 is used in factories and is suitable for explosive gas mixtures in environments classified as IIA, IIB, and groups T1 to T4 (see GB3836.1 for details). |
| Intrinsically Safe Protection Class | IP55 (Special Order IP67) |
| Work schedule | 10 minutes (special orders 30 minutes) |
| Power Supply | Motor is 3-phase AC, 380V (special order 660V or 220V), 50Hz (special order 60Hz); control cable is 220V, 50Hz (special order 60Hz); remote control is 24VDC |
Product Advantages
This product boasts excellent appearance and quality, consistently receiving positive feedback from users. It meets the diverse demands of various control coefficients and working environments.


Other parameters
Project | Details |
Model | MD9B41F - 16C |
Custom Processing | Is |
Structural form | Vertical or Offset Plate |
Material | Cast iron, carbon steel, stainless steel |
Connection Type | Flange |
Applicable Medium | Water, oil products, air, gas, dust-laden gases |
Pressure Environment | 0 - 1.6Mpa |
Operating Temperature | Carbon Steel: -29℃ to 425℃; Stainless Steel: -40℃ [Data seems incomplete. If actual range is -40℃, display as shown; if a complete temperature range is available, please supplement and modify] |
Drive Method | Electric |
Flow Direction | Bidirectional |
Type | Direct connection |
Nominal Bore Size | DN50~DN1200 mm |
Bore size | DN50~DN1200mm |
Installation Dimensions | L*B*H |
Standard | National Standard |
Parts and accessories | Actuator |
Usage | Wastewater discharge |

Product Packaging & After-Sales Service
Our company packages this series of products uniformly in wooden cases, which not only facilitates transportation but also provides excellent protection for the products. In terms of quality and service assurance, we solemnly promise:
If you have any questions about the product, please call our 24-hour service hotline at 15821856533 or log in to our website. Our company will arrange an engineer to answer your questions and clarify any doubts as soon as possible. We always adhere to the philosophy of wholeheartedly serving you and are committed to providing excellent service.
Logistics Distribution
We offer various logistics and delivery methods, including SF Express, YTO Express, Yunda Express, and nationwide rail and intermodal transport. You can freely choose based on your specific needs. Delivery destinations include major cities, transit points, and key ports both domestically and internationally.
DeclarationAll text, data, and images in this article are for reference only. For detailed information such as specific performance parameters, structural dimensions, and prices, please contact the relevant department personnel of our company. 24/7 service hotline: 15821856533.
Shanghai Hongba Electric Valve Co., Ltd. was established on April 19, 2021, with its registered address at No. 33, Lane 159, Taiye Road, Fengxian District, Shanghai. The company is engaged in general projects such as the sale of valves and flanges, pumps and vacuum equipment, pipeline transportation equipment, plastic products, electrical machinery and equipment, electronic products, instruments and meters, distribution switches and control equipment, metal products, wholesale of hardware products, and retail of hardware products.Welcome to inquire and purchase from a wide range of customers!


































