[Safety and Ultra Lightweight]-- NO overheating after using for hours. 45 degree tilting head reduces neck fatigue. Adjustable Strap makes your head get the best comfortable condition. Led Head Lamp,Cob Led Headlamp,Led Head Light,Led Headlight Flashlight Ningbo Wason Lighting Technology Co.,Ltd , https://www.wasonlight.com
[Hands-Free Lighting]-- When your task requires both hands and a bright light with a wide beam, reach for the soft digits Headlamp. It produces 300-800 lumens of different light mode to as far as 200--500 meters, with high performance led Bulbs.
[Rechargeable and Waterproof]-- Compact and powerful USB rechargeable battery provides for 6 hours using time. There is no need to change batteries. It is very convenient for you to just charge it with the USB cable. IPX6 water resistant grade, it's safe to use even when it's raining.
[8 Modes&Motion Sense Function]-- Soft Digits Headlamp has 8 modes of lighting. You get the exact level of brightness(medium/high/flash) on main light and the side light. The motion detection provides you the convenience you need for any use in the dark. Easily change between modes.
Eccentric rotary valve structure characteristics and instructions
1) Eccentric rotary valve structure and use features Eccentric rotary valve, also known as cam deflection valve, is the development of new varieties in the 70s, with the eighties. Its working principle is an eccentric rotation of the fan-shaped ball valve, the use of eccentric spherical crown and seat tangent, open, the ball off the seat; close, the core gradually contact with the seat, the ball on the seat pressure. Its features are: (1) spherical pressure on the seat, easy to damage the crystallization of the material, suitable for crystallization, tibia and dirty media occasions. Caustic soda valve is the use of this feature design. (2) simple flow path, Kv value, "self-cleaning" performance is good. (3) valve body is small, light weight. (4) Proportional adjustment, the implementing agencies need to bring locator, if only two control, the more significant advantages. (5) Seal has a hard seal, soft seal for selection. From the reliability considerations, the authors recommend the use of hard seal (surfacing wear resistant alloy). 2) the use of eccentric rotary valve instructions The valve than the single-seat valve, double seat valve, sleeve valve has more advantages, it is used more widely. However, it uses the clamp flange, the installation is not convenient; the same time, the valve reliability and weight than the full-featured ultra-light control valve, it is recommended to use full-featured ultra-light control valve (with butterfly valve, V-ball valve, eccentric valve The common advantages) excellent.