Type III polypropylene (PP-R)
1. Nature and production process
PP-R is non-toxic, hygienic and recyclable. PP-R has a Vicat softening temperature of 131 ° C, a maximum use temperature of 95 ° C, and a long-term use temperature of 70 ° C. It is a heat-resistant, heat-insulating and energy-saving product. Its density is 900 kg / m3.
The PP-R pipe is produced by extrusion molding, and the PP-R pipe is produced by injection molding.
2, production standards
At present, there is no unified national pipe standard in China. PP-R production lines are mostly imported from Germany, and PP-C production lines are mostly imported from South Korea. Manufacturers mostly develop their own corporate standards with reference to German standards.
PP-R production specifications range from 20mm to 95mm in various pipe diameter categories.
3, connection methods and accessories
Hot melt connection between PP-R pipe and fittings. When the PP-R is connected with the metal pipe fitting, a polypropylene pipe fitting with a metal insert is used as a transition, and the pipe fitting is thermally welded to the PP-R, and the metal pipe is connected by a thread.
Samsung lm301b Quantum Board 110W
Samsung lm301b Quantum Board 110W, QB350 model, 1board with 350pcs led, meanwell driver, can do knob timer(optional).Can also do spectrum customized. Meanwell driver provide 5 yes warranty, normall driver 1yr warranty.
240W, 450W,600W available too.
System Led Grow Light works both for seeding, veg and bloom stages, promote the plant growth.
Grow Light Quantum Board,Best Quantum Board Grow Light,Diy Quantum Board Grow Light,Samsung Quantum Led Board
Shenzhen Wenyi Lighting Technology Co., Ltd , https://www.szwygrow.com