Rhein Lighting has developed a line of super slim recessed panel LED downlight with a junction box. This panel led downlight is IC rated, which is permitted to be in contact with insulations in ceilings.
The led down light use the new generation of LED chips with higher lumen ouput and lower power, saving you up to 88% in energy costs.
The ultra-thin smart downlights is only 0.47 inches and requires as small as 2 inches ceiling spaces, fits various ceilings, and around joists. 5%-100% smooth dimming meets kinds of needs in applications such as kitchen, living room, bedroom, bathroom and common areas in your home or office.
Rhein Lighting is a professional manuafacturer of slim LED downlight, LED panel down light, Led Panel Light, Led Strip Light, LED rope light, LED plant light and Led Grow Light etc.
Down Light,Led Down Lights,Outdoor Downlights,Smart Downlights Rhein Lighting Technology Co.,Ltd. , https://www.rheinlighting.com
Control valve introduction
Regulating valve and ordinary valve, is a local resistance can be changed throttling element. When the fluid flows through the regulating valve, the local resistance due to the local reduction of the flow area caused by the valve core and the valve seat causes the pressure and the velocity of the fluid to change similarly to the orifice plate. Fluid flow through the control valve when the energy loss, usually with the pressure difference before and after the valve to indicate the size of the resistance loss. When the control valve diameter is certain, that is, the control valve takes over a certain cross-sectional area, and the pressure difference across the control valve △ P unchanged, the drag coefficient decreases the flow increases; the other hand, the drag coefficient increases the flow decreases. Therefore, the working principle of the control valve is in accordance with the size of the signal, by changing the spool stroke to change the flow cross-sectional area, thereby changing the drag coefficient to achieve the purpose of regulating the flow. The flow coefficient is related to the structure of the valve plug and the seat, the pressure difference after the valve before the valve, and the nature of the fluid. Therefore, it means that the flow of regulating valve capacity, but must be based on certain conditions as a prerequisite. When using the SI system, the flow coefficient is expressed as Kv. Kv is defined as the number of cubic meters flowing through a valve in one hour at a pressure drop of 1 Kg at a temperature of 278 to 313 K (5 to 40 ° C.) Many countries in inch units use Cv for the flow coefficient. To maintain a 1 psi differential pressure across the valve with 40-60 ° F water, the number of gallons of water per minute flowing through the valve.