(1) Friction coefficient: where F is the force measured by the anti-slip test to cause the initial slip of the test piece, and nf is the number of friction faces, which is the sum of the measured values ​​of the high-strength bolt tightening pre-tension corresponding to F. (2) Torque factor: where d is the nominal diameter of the high-strength bolt (mm), M is the applied torque value (N.M), and P is the bolt pre-tightening force. The 10.9 high-strength large hex bolt connection must ensure that the average value of the torque coefficient K is 0.110~0.150. The standard deviation should be less than or equal to 0.010.
(3) Initial tightening torque: In order to reduce the influence of steel plate deformation during bolt tightening, secondary tightening can be used to reduce the mutual influence between successive tightening bolts. The high-strength bolt is first twisted for the first time, so that the axial force should reach 60%-80% of the standard axial force.
(4) Final tightening torque: The torque for the final tightening of the high-strength bolt is the final tightening torque. Considering the loss of various prestressing forces, the final tightening torque is generally 5% to 10% greater than the theoretically calculated torque value according to the design pretension.
Led Grow Lights For Vegetables
What is Full spectrum led chip ?
It is the newest trend for indoor plants.Advanced LED Grow Lights chip,not provide sigle color ,provide broad spectrum 400nm~840nm , simialr with sun light ,but most is red and blue ,it is best for plant grow.This is a revolutionary step for LED Vegetation Lights which have previously been unable to act as the sole light source for the indoor garden. Suitable for all stages of plant growth.
Advantages
Plug with listed certificate safe to use.
Item Display
Ageing Test
Application
Ideal for all phases of plant growth, and works well with water solution culture and soil culture. Can be used in house garden, pot culture, sowing, breeding farm, flower exhibition, bonsai garden, green house, sowing farm, greenhouse cultivation, water soluble breeding, pipeline cultivation and so on.
Our Quality Control systems and after-sales
Package
Warnings:
1.lndoor use only.
2.To avoid being damaged,do not use water or drip irrigation while using.
3.Sunshine lighting time should be 12-18 hours.
4.While irradiating the plants,the height of led grow lamp is not less than 10 inches,
low height will cause the destruction of plants.
5.Highly hang the lamp will weaken the energy and affect the growth cycle of the
plants, so the lamp should not be hung too high.
6.While taking care of the plants, please spray the leaves and branches 2-3 times everyday,
to ensure the the plants do not wrinkle a wither, and have no phenomenon of few fruit, and
hard pericarp.
Trade Terms
Payment: T/T, L/C, Paypal, 30% deposits before production, 70% balance to be paid before deliverying(Western Union are welcome)
Sample will be delivered within 7 working days.
Discounts are offered based on order quanlityes.
MOQ:sample order are acceptable
Delivery ways:DHL,UPS,FedEx,TNT, door to door,by sea,by air,etc.
Philion is a company that makes it possible to produce fresh vegetables:
Where it is too hot or too cold,
Where there is too much or too little sunlight,
We create in a complete closed indoor environment the optimal conditions to grow.
Led Grow Lights For Vegetables,Led Vegetable Light,Led Vegetables Grow Lights,Energy Saving Led Grow Lights
Shenzhen Phlizon Technology Co.,Ltd. , https://www.szledaquariumlighting.com