DQM-III&II Explosion-proof Cable Glamds...

Explosion Protection Type

• Standards: CENELEC, IEC, NEC
• Hazardous Area Zones:
  • Gas: Zone 1 and Zone 2
  • Dust: Zone 20, Zone 21, and Zone 22
  • Classified Locations: Class I, Zone 1 and Zone 2; Class I, Division 1, Groups A, B, C, D

Product Parameters

• Explosion Protection Ratings:
  • IECEx (Gas and Dust): Ex d IIC Gb, Ex e IIC Gb, Ex tb IIIC Db IP66 (or Ex db, Ex eb, Ex ta variants)
  • ATEX (Gas and Dust): II 2 G Ex d IIC Gb, II 2 G Ex e IIC Gb, II 2 D Ex tb IIIC Db IP66
• Material: Stainless steel or nickel-plated brass
• Degree of Protection: IP66
• Ambient Temperature: -60°C to +100°C (or -60°C to +90°C depending on model)
• Connection Thread: Metric thread (Standard); G thread or NPT thread (Optional)

Classification & Origin

• HS Codes: 401693, 391740, 730799, 790700, 760900
• Country of Origin: China

Industry & Application

• Core Function: A critical sealing device installed at entry points of explosion-proof enclosures to maintain system integrity and IP ratings.
• Applicable Industries: Petroleum, natural gas, chemical, coal mining, metallurgy, military, nuclear power, shipbuilding, ports, and railways.
• Certifications: Holds certificates from authorized bodies including ATEX, IECEx, and EAC.

FAQ (Frequently Asked Questions)

• Q1: What is a “Dual-Certified” cable gland?
  • A1: It refers to products holding two certification systems (e.g., ATEX & IECEx) to meet high regulatory compliance and reliability standards.
• Q2: How to verify an installed gland?
  • A2: Check for cracks or corrosion; ensure certification matches the equipment; and verify that locking nuts are securely tightened.
• Q3: When is an explosion-proof plug required?
  • A3: Used for sealing unused ports to maintain enclosure integrity or when cables are temporarily removed for maintenance.
• Q4: Why is a matching gland critical?
  • A4: A substandard gland creates a fatal leak path that can nullify the protection of expensive assets, posing catastrophic risks.