BK8050 Series Control Switches
- ◆The explosion proof control switch is available in both latching (self-locking) and spring-return (momentary) forms, the switch adapts to diverse control requirements.
- ◆The explosion proof control switch features a crisp, tactile switching mechanism with precise contact actuation, delivering consistent performance and reduced contact bounce.
- ◆Control switch designed with standardized mounting dimensions and clear wiring terminals, the switch allows quick and hassle-free installation, reducing on-site labor costs.
TECHNICAL DATA
Explosion Protection Type
- Standards: CENELEC, IEC, NEC
- Zones:
Zone 1 and Zone 2
Zone 21 and Zone 22
Class I, Zone 1 and Zone 2
Class I, Division 2, Groups A, B, C, D
- Explosion Protection:
IECEx(Gas): Ex db eb IIC Gb
ATEX(Gas): II 2 G Ex db eb IIC Gb
Product Parameters
- Product Type: BK8050
- Material Enclosure: Plastic
- Material Panel: Acrylonitrile-butadiene-styrene (ABS)
- Material Seal: Nitrile butadiene rubber (NBR)
- Material Rotary actuator: Polycarbonate (PC)
- Rated Voltage: AC: 500V, 460V, 440V, 400V, 380V, 230V; AC/DC: 220V, 110V, 48V, 36V, 24V, 12V
- Rated Current: Max. 20A
- Switch Angle: n x 45°/n x 90°
- Ambient Temperature: -20°C~+70°C(ATEX), -60°C~+90°C(IECEx)
- Cable Connection: 2.5mm²
Product Classification & Origin
HS code: 853710
Country of Origin: China
Applicable Industries
Heavy Industries: Across heavy industries from oil and gas to petrochemical and other industries where flammable elements are a constant threat.
Function: Our explosion-proof control switches are the reliable solution to the core issue of potentially introducing an ignition source during the most hazardous manual operations.
Safety: Certified flameproof design ensures it will not become an ignition source, guaranteeing safety in hazardous areas.
Credibility
Certifications: Certified to ATEX, IECEx, EAC and so on.
Reliability: Engineered for safety in hazardous environments, delivering reliable performance even in damp, vibrating and corrosive harsh environments.
FAQ
Q1: How to select a suitable explosion-proof control switches?
A1: Selection should be based on the following criteria:
- a. Explosion-proof & IP Ratings: Match the marking and IP rating to your site’s hazardous substances (gases/dust).
- b. Function & Build: Select function (e.g., NO/Start, NC/Stop, E-Stop, illuminated), material (e.g., PC), and color.
- c. Contacts: Specify the number of NO/NC contact sets needed.
- d. Certifications: Confirm compliance with target market standards.
Q2: What are the specific requirements for an ex emergency stop button?
A2: Emergency stop buttons must comply with mandatory safety standards and possess the following features:
- a. Direct-Action Contact Break: Mechanically severs the load circuit.
- b. Maintained Locked State: Requires a manual reset action (e.g., twist-to-release).
- c. High-Visibility Design: Red mushroom head, ideally on a yellow background.
Q3: Can operational labels be temporarily attached to the housing of flameproof control switches in a chemical plant?
A3: Not recommended. Labels can impair heat dissipation and block critical markings. If required, please use temperature-resistant and anti-static materials. The best practice is to select buttons with a custom nameplate slot or laser engraving.
Q4: What could be the potential reasons if the equipment does not respond after pressing the buttons?
A4: Troubleshoot following these steps (ensure power is isolated before proceeding):
- Check Wiring: Inspect for loose or disconnected internal wiring.
- Check Contacts: Examine if the contacts are oxidized or burnt.
- Check the Load: Verify the health of the relay or contactor coil being controlled.
- Check the Button Mechanism: Determine if the mechanical assembly is jammed or damaged.
