Explosion-proof grade difference

Explosion-proof equipment definition: Electrical equipment that does not cause the surrounding explosive atmosphere to ignite under specified conditions.
Divided into two categories
Category I: Coal mine underground electrical equipment;
Category II: Electrical equipment for all other explosive atmospheres except coal mines and downholes.
Class II can be further divided into Classes IIA, IIB, and IIC. Devices that mark IIB can be applied to the conditions of use of IIA equipment; IIC can be applied to the conditions of use of IIA and IIB.
Note: The IIC mark is a higher explosion-proof rating, but it does not mean that the device performs best.
Maximum surface temperature: The maximum temperature reached by any component of an electrical device that may cause ignition of the surrounding explosive atmosphere when the electrical device is operating under the most unfavourable operating conditions within the specified range. The maximum surface temperature should be lower than the flammable temperature.
For example, the ignition temperature of an explosive gas in an explosion-proof sensor environment is 100°C, then the highest surface temperature of any part of the sensor under the worst working conditions should be less than 100°C.

Cnc Machining

RongNa has more than 10 years experience manufacturing custom machining and precision parts for diverse regional and national partners. Our working team uses the latest in CNC machining machine
We offer advanced 5-axis and 3-axis machining services that significantly increase the range of possibilities for working with complex surfaces and creating parts in numerous shapes and sizes. We provide custom Cnc Milling service and 3-axis, 5-axis CNC milling parts
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How Does 5-axis CNC MILLING WORK?


Milling is the process of cutting and drilling material using a rotating cylindrical tool. This tool is held in a spindle and comes in a variety of sizes and forms. With 5-axis machining, there have two extra rotary axes defined by A, which rotates around the X axis, B, which rotates around the Y axis, and C, which rotates around the Z axis. The combination of additional axes depends on the machine and comes in variations, including AB, AC, or BC.
With 5-axis machining, the table or cutting tool can be tilted, creating the ability to avoid collision with the tool holder and allowing for better access to part geometry. This also ensures improved tool life and cycle time as it helps maintain cutting position and constant chip load. This type of machining offers a push toward single-setup machining, creating shorter lead times and increasing efficiency.
CNC milling is complex machining technique which utilizes several types of pre-programmed CAM and CNC controls to build customized components or parts. We are professional custom CNC milling company and 5 Axis CNC Milling Service provider in China, we offer the manufacturing of precision machined parts and solutions at affordable rates to meet the growing demands of the clients across the world.

We have several machining centers for creating complicated shapes or parts for your products. Contact for more.
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