Door panel: door panel is made of stainless steel 304 with no frame. Core materials are paper honeycomb, aluminum honeycomb, PU, EPS and etc. The installation sites of door lock, door closer and hinge are reinforced with square tubes of more than1.5mmthickness which are compression moulded by special technology.
Door frame: it is made of completely stainless steel 304. The connection types with wallboards are double-clip type and aluminum connection. The former is applied mostly to machine made wallboard and the latter hand made wallboard. The accessories are double window and lift type sweeping bar. The lock can be famous door lock or the owners can select lock brands themselves.
Specification: common sizes 800X2100, 900X2100, 1500X2100 or1800X2100, can customize to customers` requirements, the materials can be selected according to customers` requirements such as306Lor other special materials.
Features: the stainless steel 304 door we produced are of elegant appearance, sturdy and durable, acid and rotting resistance and thermal insulation. It is the first choice for high-end projects at home and engineering concerning foreign affairs that requires for anticorrosion and high quality such as electronics factory and food factory
1 rich liquid battery: or wet battery, is the most conventional and applied lead-acid battery, the battery has a large amount of flowing electrolyte, European telecommunications backup power supply mainly uses rich liquid battery (OPZS), its advantage is the service life Long, good battery consistency, small floating charge pressure difference, the disadvantage is that the process should be added with acid and water regularly, adjust the electrolyte density, there is acid mist overflow, can not be placed in the same room with the communication equipment.
2 valve-regulated sealed lead-acid battery: referred to as VRLA battery. In 1971, Gates Company first used ultra-fine glass fiber diaphragm for lead-acid battery, so that the electrolyte was absorbed into the AGM diaphragm to make a poor liquid battery. The purpose of the composite makes the lead-acid battery realize the dream of sealing. As soon as the VRLA battery came out, it was widely used in the communication industry and the power industry.
The valve-regulated sealed lead-acid battery is so fast because it has the following characteristics:
a. During the entire life of the battery, no need to add water, no need to adjust the acid density and other maintenance work, with "maintenance-free" function (relative to the maintenance of traditional lead-acid batteries).
b. No leakage, no acid mist, no corrosion equipment.
c. Self-discharge is small, the self-discharge rate at 25 ° C is less than 3% (monthly).
d. The battery life is long, and the floating state can be used for more than 10 years at 25 °C.
e. Compact structure, good sealing, anti-vibration and high specific capacity.
f. The battery has good high and low temperature performance and can be used in the range of -40 to 50 °C.
g. There is no “memory effect†of cadmium-nickel battery (refers to easy loss when working in shallow cycle)
One type of VRLA battery is a colloidal valve-regulated sealed lead-acid battery, which uses a gas phase SiO2 and dilute sulfuric acid to form a gel electrolyte. The colloidal battery is a liquid-filled sealed battery, and the finished battery can no longer be poured into the electrolyte, and the liquid battery is floated. Life expectancy is slightly higher than AGM batteries. Article from http://
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Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.pvchighspeeddoor.com