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NEXGEN ELECTROMECH — Your Trusted Partner for Premium Electrical & Industrial Solutions
Authorized Distributor of Fuji Electric, Baumer, R.STAHL, LAPP, Rishabh, GIC & Weidmuller
Home Products R.STAHL Flame proof Well Glass Light Fittings

Flame proof Well Glass Light Fittings

The Series 6057 is STAHL's flameproof (Ex d) well glass pendant light fitting, engineered for lighting hazardous areas classified as Zone 1 and Zone 21, the gas and dust-hazardous zones common in refineries, chemical plants, and process industries. Built from copper-free aluminium for full corrosion resistance and finished in a durable powder coat, it houses its driver and LED unit in two physically separate compartments, so a fault in one doesn't compromise the other, a genuinely fail-safe design rather than just a rugged enclosure around standard components. It withstands mechanical impact up to 20J (IK10 rated), operates across a -20°C to +60°C ambient range, and is certified and approved by PESO for use in the classified zones it's rated for, with a driver life promise exceeding 50,000 operating hours at 50°C ambient.

Genuine Hazardous-Area Protection, Not Just a Sealed Housing

  • Rated for installation in PESO Zone 1, Zone 2, Zone 21, and Zone 22 — covering both gas and dust hazardous classifications, not just one.
  • Ex d flameproof protection method means the enclosure is designed to contain any internal explosion and prevent it from igniting the surrounding hazardous atmosphere, rather than simply excluding gas/dust from entering.
  • Certified under certificate number KLPL/Ex/21-032X, with gas marking Ex db IIC T6 Gb for 25W/45W variants or Ex db IIC T5 Gb for 65W/80W variants, and dust marking Ex tb IIIC T85°C Db to T100°C Db depending on wattage.

Built for Corrosion Resistance and Mechanical Toughness

  • Copper-free aluminium construction eliminates a common source of corrosion-driven enclosure failure in aggressive industrial atmospheres.
  • Powder-coated finish, RAL 7035, adds a further layer of environmental protection over the base aluminium.
  • IK10 impact rating means the fitting withstands impacts up to 20 joules — relevant for installations near walkways, cranes, or areas where accidental mechanical contact is a real possibility.
  • IP66/IP67 ingress protection keeps dust and water out even under heavy washdown or outdoor exposure.
  • Lamp cover uses borosilicate toughened glass in a dome shape, secured with a threaded locking mechanism and a silicone gasket for a reliable long-term seal.

Two-Compartment Design for Fail-Safe Operation

  • Separate compartments for the driver unit and LED unit mean a driver-side fault is physically isolated from the LED unit, reducing the risk of a single point of failure taking down the whole fitting or compromising the explosion-protection rating.
  • Driver includes under-voltage, over-voltage, and over-temperature protection, plus surge protection rated to 4kV as standard, with 20kV available on request — meaningful resilience against the electrical disturbances common on industrial power networks.

Strong Light Output Across Four Wattage Options

  • Available in 25W, 45W, 65W, and 80W variants, with luminous flux from 3,070 lm up to 7,955 lm.
  • Luminaire efficacy ranges from 103 to 113 lm/W depending on wattage — genuinely efficient output rather than a fixture that sacrifices efficiency for ruggedness.
  • LED colour temperature of 5700K as standard, with 5000K or 6500K available on request, and colour rendering index above 80 for accurate visual assessment of work areas and equipment.

Long Service Life, Engineered for Continuous Duty

  • Driver lifetime rated at 40,000–50,000 hours at 50°C ambient, C10 = 10% failure rate, depending on wattage variant.
  • LED service life rated at 80,000–100,000 hours, L70B50 @ Ta 50°C — meaning even after that duration, at least 70% of units still deliver at least 70% of their original light output.
  • Operating temperature range extends to -20°C to +50°C as standard, with +60°C available on request for the 25W, 45W, and 65W variants, and +55°C on request for the 80W variant.

Flexible Mounting to Fit the Installation

  • Standard pendant mounting, plus wall-mounted, ceiling-mounted, suspension, or pole-mounted configurations using the appropriate accessory.
  • Horizontal and vertical pipe mounting brackets available in both Ø50mm and Ø60mm sizes.
  • Ring bolt option, M8x9, for suspension-style pendant installation.
  • Dual M20 cable entries with loop-in/loop-out wiring rated up to 3x10A, supporting daisy-chained installations across multiple fittings.

Wattage Selection Table

Wattage Reflector Luminous Flux Luminaire Efficacy Product Type Art. No. Weight (kg)
25 W Internal 3,070 lm 113 lm/W 6057/2112-101-4310-121-200 Pend. Zn1 IND 288953 5
25 W Internal 3,070 lm 113 lm/W 6057/2112-101-4330-121-200 Pend. Zn1 IND 288954 5
45 W Internal 4,661 lm 104 lm/W 6057/2114-101-4310-121-200 Pend. Zn1 IND 288955 5
45 W Internal 4,661 lm 104 lm/W 6057/2114-101-4330-121-200 Pend. Zn1 IND 288956 5
65 W Internal 6,759 lm 109 lm/W 6057/2116-101-4310-121-200 Pend. Zn1 IND 288957 5
65 W Internal 6,759 lm 109 lm/W 6057/2116-101-4330-121-200 Pend. Zn1 IND 288958 5
80 W Internal 7,955 lm 103 lm/W 6057/2118-201-4310-121-200 Pend. Zn1 IND 288959 5
80 W Internal 7,955 lm 103 lm/W 6057/2118-201-4330-121-200 Pend. Zn1 IND 288960 5

Available Mounting Accessories

Description Art. No.
Wall/ceiling mounting bracket, spare, 1.4301 288823
Ring bolt M8x9, similar to DIN 580 C15 115896
Horizontal pipe mounting bracket, Ø50mm 289889
Vertical pipe mounting bracket, Ø50mm 289890
Horizontal pipe mounting bracket, Ø60mm 290041
Vertical pipe mounting bracket, Ø60mm 290042

Applications

  • Refineries and petrochemical plants – Zone 1 and Zone 21 rating covers both gas and dust-hazardous process areas.
  • Chemical processing facilities – corrosion-resistant copper-free aluminium construction suits aggressive atmospheres.
  • Bulk material handling and storage – dust classification, Zone 21/22, rating suits grain, powder, and other combustible-dust environments.
  • Outdoor and washdown-exposed installations – IP66/IP67 protection and wide operating temperature range support both indoor and outdoor hazardous-area lighting.
  • General area, equipment, and object lighting in classified zones – suitable wherever general illumination is needed within an explosion-hazard classified area, mounted as a pendant, wall, ceiling, suspension, or pole fixture.
Spec 25W 45W 65W 80W
Certificate Number KLPL/Ex/21-032X (all variants)
Gas Marking Ex db IIC T6 Gb Ex db IIC T6 Gb Ex db IIC T5 Gb Ex db IIC T5 Gb
Dust Marking Ex tb IIIC T85°C Db Ex tb IIIC T85°C Ex tb IIIC T100°C Db Ex tb IIIC T100°C Db
Approval PESO (all variants)

Electrical

Spec Details
Rated Operational Voltage 220–240V AC ±10% (optional 110–277V ±10% on request)
Rated Operational Current ≤0.130A (25W) / ≤0.210A (45W) / ≤0.288A (65W) / ≤0.363A (80W)
Frequency 50/60 Hz
Power Factor ≥0.96
THD <11% (25W/45W) / <10% (65W/80W)
Inrush Current ≤16A, Δt=100μs (25/45/65W); ≤64A, Δt=108μs (80W)
Surge Protection 4kV standard (20kV on request)

Lighting

Spec Details
LED Colour Temperature 5700K (5000K, 6500K on request)
Colour Rendering Index >80

Ambient Conditions

Spec Details
Operating Temperature -20°C to +50°C (+60°C on request for 25W/45W/65W; +55°C on request for 80W)
Storage Temperature -20°C to +60°C

Mechanical

Spec Details
Degree of Protection IP66 / IP67
IK Rating IK10 (impact resistant up to 20J)
Protection Class I
Enclosure Material Aluminium (copper-free)
Enclosure Colour Powder coated, RAL 7035
Lamp Cover Material Borosilicate toughened glass (dome)
Gasket Material Silicone
Lamp Cover Locking Threaded

Service Life

Spec 25W 45W 65W 80W
Driver Life @ Ta 50°C (C10) 50,000h 50,000h 40,000h 50,000h
LED Service Life (L70B50 @ Ta 50°C) 100,000h 100,000h 100,000h 80,000h

Installation

Spec Details
Standard Connection 4 sq.mm
Trough Wiring Loop in / loop out, max. 3x10A
Cable Entries 2 x M20
Cable Glands On request
Stopping Plug On request
Wire Guard On request

Physical Dimensions (Standard Configuration)

Spec Details
Diameter 234 mm (184.10 mm inner dome)
Depth 114.75 mm
Mounting Bolt Pattern 3 x M8
FAQ

Frequently Asked Questions

Find answers to common questions about our products and solutions.

It's rated for PESO-approved installation in Zone 1, Zone 2 (gas hazardous zones), and Zone 21, Zone 22 (dust hazardous zones), making it suitable for both gas and dust classified areas.

Ex d (flameproof) protection means the enclosure is designed so that if an internal explosion were to occur, it would be contained within the housing and prevented from igniting the surrounding hazardous atmosphere — a fundamentally different protection principle than simply sealing the enclosure against dust or gas ingress.

25W, 45W, 65W, and 80W variants, with luminous flux ranging from 3,070 lm to 7,955 lm and luminaire efficacy between 103 and 113 lm/W.

Standard pendant mounting is available, along with wall, ceiling, suspension (via ring bolt), or pole mounting using horizontal or vertical pipe brackets (Ø50mm or Ø60mm). All mounting accessories are available separately.

The driver unit and LED unit are housed in physically separate compartments, isolating a fault in one from affecting the other — improving overall reliability and helping maintain the explosion-protection integrity of the fitting.

Driver life is rated at 40,000–50,000 hours (C10 = 10% failure rate) at 50°C ambient depending on wattage, while LED service life is rated at 80,000–100,000 hours (L70B50 @ Ta 50°C).

Standard operating range is -20°C to +50°C, with +60°C available on request for the 25W, 45W, and 65W variants, and +55°C on request for the 80W variant.

It's certified under KLPL/Ex/21-032X and approved by PESO, with gas marking Ex db IIC T6 Gb or Ex db IIC T5 Gb (depending on wattage) and dust marking Ex tb IIIC T85°C Db to T100°C Db.

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Flame proof Well Glass Light Fittings

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