Large-Bore Explosion-Proof Slip Ring (220mm Inner Diameter, 20 Channels, 10A)

• Non-Standard Large-Bore Explosion-Proof Slip Ring-DHK large inner hole Series

Available for custom, standard ID 3-500 mm, OD 10-800 mm

DHK220F-20-10A series Large-Bore Explosion-Proof Slip Ring (220mm Inner Diameter, 20 Channels, 10A).Certified to China’s GB3836 explosion-proof standard, this slip ring combines intrinsically safe circuitry with a flameproof steel housing for dual spark-leakage prevention. Its sealed design blocks dust/gas intrusion, with an IP65 rating ensuring harsh-condition performance. Crafted from 304 stainless steel and paired with 3rd-gen precious metal fiber brush contacts, it delivers lossless power/signal transmission. Supporting up to 300rpm rotation, its dynamic resistance stays ≤5mΩ, ensuring stable high-current/high-frequency data flow. A modular design allows customizable multi-channel media configuration, while its robust build withstands extreme environments (high temp, humidity, corrosion). Tailored for filling machines, reactor mixers, AGV explosion-proof vehicles—safe and reliable.

• Typical Applications:

Application Fields
Explosion-proof slip rings are widely deployed in high-risk industries including oil and gas (offshore platforms, refineries, drilling rigs), chemical and petrochemical plants, coal mining equipment, grain handling and dust-prone facilities, military vehicles, marine cargo cranes, and automated production lines handling volatile solvents. Any rotating system requiring continuous power or signal transmission in Zone 1, Zone 2, or hazardous dust areas benefits from these devices.

• Product Naming Description:

(1)Product type: DH—electric slip ring
(2)Installation method: K—through hole
(3)Through hole product bore diameter 220 mm   F—Explosion-Proof
(4)Total circuits:20 circuits
(5)The rated current or it will not be marked if it passes through a different rated current for the circuits.

(6) Identify number: –XXX; In order to distinguish different specifications of the same product model, the identification number is added after the name. For example: DHK080-24 has two sets of products with the same name, the cable length, connector, installation method, etc. are different, you can add the identification number: DHK080-24-002; if there are more of this model in the future, and so on -003 , -004, etc.

• DHK220F-20-10A Through Bore Slip Ring Technical Parameters

Explosion-Proof Slip Ring – Reliable Power & Signal Transmission in Hazardous Environments

An explosion-proof slip ring is a specialized electromechanical device designed to safely transmit electrical power and data signals across rotating interfaces in potentially explosive atmospheres. Unlike standard slip rings, it incorporates robust flameproof enclosures, advanced sealing technologies, and spark-suppression mechanisms to prevent any internal arcing or high-temperature discharge from igniting surrounding flammable gases, vapors, or dusts. These devices are essential for ensuring operational safety and compliance with international standards such as ATEX, IECEx, and UL.

Customization & R&D Strength
Our company specializes in tailor-made explosion-proof slip rings to meet unique customer requirements. We offer flexible design options including custom current/voltage ratings (from milliamps to hundreds of amps), number of circuits (up to 100+ channels), through-bore sizes, mounting flanges, and communication protocols (PROFIBUS, CANBUS, Gigabit Ethernet). With an experienced in-house R&D team and certified explosion-testing facilities, we can deliver prototypes in as little as 4–6 weeks and support full-scale mass production with full traceability. Whether you need an ATEX-certified unit for an offshore winch or a compact flameproof slip ring for a mobile robot, our engineers provide end-to-end support from concept validation to certification assistance, ensuring your rotating systems operate safely and reliably in the harshest hazardous environments.