The gap between China's heating system and Europe

A very important reason for the successful development of steel radiators in Europe is that civil building hot water heating systems have good design, water quality and operational management practices. The design regulations must use a closed system, using a diaphragm-type pressure expansion tank, the plastic pipe must have an oxygen barrier, so it will not corrode the steel radiator. In sharp contrast, the water quality, water treatment and operation management of domestic civil construction hot water central heating systems are in a disorderly and backward state, and there are no standards and procedures for heating water quality and water treatment; There is no formal definition of open and closed systems. European countries have long stipulated that as long as it is open to the atmosphere, it is an open system. The German VDI even believes that the use of plastic tubes without an oxygen barrier is an open system.

The operation and management of China's heating system is very confusing. Due to leakage and water release, it causes a lot of water loss. In a heating system of 200,000 square meters, the daily water supply is more than 40 cubic meters, and the water supply is more than 100 per day. Cubic meters, a large amount of hydration makes a large amount of oxygen, calcium and magnesium ions, chloride ions into the system, worsening the operating conditions of the system, but also a lot of heat and water resources. In the non-heating season, the water in the system is often drained, so that oxygen and water vapor coexist in the system for a long time, causing serious corrosion and scaling of the equipment.

Concerned about surprises

Label: The gap between China's heating system and Europe

Previous: Installation requirements for high and low temperature test chambers Next: Technical development of industrial endoscopes

Optical Colored Glass Filter

Filters are designed by their manufacturers to transmit or absorb different wavelengths of light. Optical Filter is widely used in medical instrument, finance, metallurgical, photography,cameras, navigation, military, biography instrument, optical instrument and science field etc.

Longpass filters are designed to have a sharp transition from reflection to transmission, making them ideal for various applications. Available in a variety of cut-on wavelengths, these filters are designed for fluorescence and order sorting applications.

China star optics can supply a full range of filter. They are shortpass, longpass, band pass, ultraviolet, infrared, heat absorbing, and color temperature conversion filters. We use material by China to Schott, Hoya, and other manufacturers to process them. Metallic films, colored glasses and thin dielectric films filter are all available per your requirements.

Specification of our color filter as follow:
Material:Filter Glass,BK7
Dimension: 4mm-160mm - 0.20mm
Squares/Rectangles:1mm-165mm
Thickness:0.5mm-4mm
Wavelength range:190nm to 4.5um
Thickness tolerance:+/-0.01mm-0.1mm
Edges:Fine
Ground Flatness:Up to Lambda/10
Surface quantity: 80/50-20/10 Scratch/Dig

Optical Colored Glass Filter,Optical Bandpass Interference Filter,Optical Color Glass Filter,Square Colored Glass Filter

China Star Optics Technology Co.,Ltd. , https://www.realpoooptics.com