Comparison of domestic and international standards for lamps in China

March 19, 2024

At present, China has formulated and issued 23 national standards for lighting safety GB 7000 series, of which GB 7000.1 is the basic standard in the series of standards. The Chinese luminaire safety standard system adopts the basic principle equivalent to the IEC luminaire safety standard system, which is completely equivalent to the corresponding IEC standard. Correspondence between national standards and IEC standards for lamps and lanterns. For example, China is a major producer and exporter of global lighting products. China's lighting standards have been equivalent to the IEC series of lighting standards as early as 2002. At present, China has formulated and issued 23 national standards for lighting safety GB 7000 series, of which GB 7000.1 is the basic standard in the series of standards. The Chinese luminaire safety standard system adopts the basic principle equivalent to the IEC luminaire safety standard system, which is completely equivalent to the corresponding IEC standard. The correspondence between the national standard of the luminaire and the IEC standard is shown in the attached table. National standard and listed standard comparison table for attached lamps
Hydraulic Support System Seals

Hydraulic support seal

The seal of the Saifu lever hydraulic support is composed of a sealing ring, a retaining ring, a guide ring and a dustproof ring.
Sealing ring:
Prevent leaks. Used in the category of hydraulic supports: drum ring, composite seal, mountain ring, bud ring, O-ring, etc. Generally rubber, polyurethane material.

retaining ring:
Used together with the sealing ring, it has the functions of anti-crowding, guiding and reducing wear. It is generally made of phenolic XII cloth, 45% copper powder mixed with filled PTFE and other materials.

Guide ring:
It is a part used on the jack piston or piston rod to support the movement of the piston or piston rod. It can prevent the piston or piston rod from direct contact and friction with the cylinder during the movement, and protect the cylinder and the piston or piston. The rod is not damaged. Generally, it is polyoxymethylene, polytetrafluoroethylene and other materials.

Dust-proof ring: the main function is to go out and reciprocate the piston rod to expose the impurities attached to the outer surface of the cylinder, so as to prevent impurities such as external dust from entering the inside of the sealing mechanism. Generally rubber, polyurethane and other materials.
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