Shenzhen Zhongnuo Testing Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal safety certification application consulting services, offering a one-stop explosion-proof technology consulting service.
Why choose tempered glass for explosion-proof transparent parts?
Transparent components are an important material for explosion-proof electrical equipment. When selecting transparent components, customers often ask what material to use? Can it be glass? Can it be plastic?
Below, Shenzhen ZN Testing Technology Co., Ltd. explains to you.
The GB/T3836.1 specification clearly stipulates the thermal shock test for transparent components, which is designed to verify the thermal stability of glass under rapid cooling conditions. Currently, tempered glass is a material that not only meets this requirement but also offers a high cost-performance ratio.
普及 the fact that tempered glass, after being heated and quenched, forms a uniform compressive stress layer on the surface to counteract the tensile stress produced during rapid cooling. Therefore, even when subjected to rapid cooling, qualified tempered glass will have a compressive stress to offset the stress.

What is positive pressure explosion-proof? What technical requirements are there for obtaining a positive pressure explosion-proof certification for a product?
Positive pressure explosion-proof refers to introducing clean air or inert gas into the interior of the equipment.
Ensure internal equipment pressure exceeds the external explosive environment pressure, isolating explosive mixtures from entering the equipment to achieve explosion-proof performance.
The applicable standards for explosion-proof certification with positive pressure are GB/T 3836.1 and GB/T 3836.5.
Primarily, it assesses the equipment's ventilation time, pressure monitoring system, pressure range, blowing, and alarm functions to meet explosion-proof performance requirements.
Positive pressure type has three explosion-proof grades: pxb, pyb, pzc.
Select the appropriate explosion-proof certification level based on product structure and explosion-proof areas.
ZhongNuo Inspection has been in the explosion-proof industry for many years, well-versed in the requirements of the GB/T 3836 series standards.
We have extensive certification experience in the positive pressure explosion-proof field.
We offer a one-stop service for explosion-proof technical guidance and consulting, including initial positive pressure explosion-proof design and rectification, drawing evaluation, installation guidance, and certification acquisition.
Our successful cases include positive pressure ultrasonic vibration plates, positive pressure omni-directional antennas, and positive pressure film thickness gauges, etc.
If you have a need for this, feel free to message us anytime!

Explosion-proof certification is the process of verifying that equipment meets the requirements of explosion-proof standards, type testing, and routine tests, and issuing relevant certificates of compliance.
Certificates are available for Ex equipment or Ex components.
The explosion-proof standard GB/T3836 specifies that electrical equipment trial-produced by manufacturers according to the explosion-proof type standards listed in GB/T3836.
All must be sent to a nationally authorized institution for防爆testing in accordance with the relevant standard regulations and obtain a防爆qualification certificate.
This means that explosion-proof products must obtain the relevant explosion-proof certification.

What products can apply for the intrinsically safe explosion-proof certification? What are the requirements?
"An intrinsically safe design is one of the many explosion-proof protection types, which limits electrical energy so that the equipment remains safe even in the event of a fault."
A type of explosion-proof protection that the generated energy is not sufficient to ignite the surrounding explosive environment.
Therefore, intrinsic safety type has restrictions on the current, voltage, capacitance, inductance, etc. of electrical equipment, and is only suitable for low-power devices.
Simultaneously, specific requirements are in place for the power supply method of intrinsically safe equipment, plastic casings, and wireless transmission.
To apply for intrinsic safety certification, the product's schematic diagram, PCB layout, and other relevant documents must be provided.
ZhongNuo Inspection has dedicated engineers specializing in intrinsically safe circuit and structural design.
We offer technical consulting services for explosion-proof circuit design, drafting, and modifications. We have extensive experience in designing and obtaining certifications for intrinsically safe ia, ib, and ic explosion-proof ratings.
If you require certification in this area, feel free to DM us!
Explosion-proof Certification Application Consulting Service - Shenzhen ZhongNuo Testing Technology Co., Ltd.