Q: How do I select the right BYWZ9 model?

A：Select the model based on brake wheel diameter and required braking torque. The BYWZ9 covers wheel diameters of 160–800 mm and braking torques of 80–12,500 N·m. In the model number, "400" indicates a 400 mm wheel diameter, while "121" identifies the actuator specification. Share your operating parameters for selection assistance.

Q: What are the main applications of the BYWZ9 series electro-hydraulic drum brake?

A：The BYWZ9 series is widely used in coal mining, chemical processing, port operations, and metallurgical industries.

Q: What brake wheel diameters are supported?

A：The BYWZ9 accommodates wheel diameters from 160 to 800 mm, covering a wide range of industrial applications.

Q: Can the brake operate on a power supply other than 380 V?

A：The standard supply is AC 380 V, 50 Hz. Other voltages and 60 Hz operation are available on request.

Q: Does the brake engage automatically during a power failure?

A：Yes. The normally closed design releases when energized and applies the brake by spring force when power is lost, without relying on electrical signals to engage.

Q: How does the brake reduce uneven pad wear?

A：The interlocking equalization mechanism and automatic shoe-positioning device help maintain even clearance on both sides, reducing uneven wear and extending pad life.

Q: Is the spring protected against corrosion in underground environments?

A：The spring is enclosed in a square tube to help protect it from coal dust, moisture, and corrosive substances.

Q: Is the brake suitable for frequent operation?

A：With an Ed series explosion-proof actuator, the brake supports operating frequencies of up to 2,000 cycles per hour and S1 continuous-duty operation, subject to the specified operating conditions.

Q: How can I check the braking torque setting?

A：A scale on the spring housing allows the torque setting to be checked visually without disassembly or calculation.

Q: What explosion-proof ratings does the BYWZ9 have?

A：The stated explosion-proof rating covers gas groups IIA, IIB, and IIC and temperature classes T1–T4, in accordance with GB 3836.2. Confirm the exact marking against the product certificate.

Q: Is the BYWZ9 suitable for underground coal mines?

A：Yes. It is designed for applicable coal mine environments and can be used on equipment such as underground belt conveyors and hoists, subject to the required certifications and operating conditions.

Q: Where else can the brake be used in hazardous environments?

A：Applications include explosion-proof cranes in chemical plants, metallurgical hoisting equipment, port loading and unloading machinery, and coal preparation plants, where the product is suitable for the specific hazards and conditions.

Q: What installation orientations are supported?

A：The brake supports both longitudinal and transverse mounting. Confirm the required orientation and installation dimensions before ordering.

Q: What should I check before installation?

A：Position the pad-clearance adjustment and equalization mechanisms where they are accessible for maintenance. Ensure the brake wheel surface is clean and free of oil.

Q: Do I need to dismantle the brake arm to replace the pads?

A：No. The clip-on, integrally molded pads can be replaced without dismantling the brake arm, helping reduce maintenance time and downtime.

Q: What routine adjustments are required?

A：The interlocking mechanism helps maintain even pad clearance. Periodically inspect pad wear and check the torque scale.

Q: What is the warranty period?

A：The brake comes with a one-year warranty. Parts are replaced free of charge for confirmed product quality issues during the warranty period.

Q: What shipping and after-sales support do you provide?

A：Products undergo quality inspection before shipment, and the required certificates are supplied. We provide shipment tracking, support pre-delivery inspection, and offer remote technical guidance, installation and commissioning assistance, and 24-hour online support.