Ul - American safety testing laboratory
ANSI / bhma.a156.4-2000 standard shall be implemented
2 million times for pT1, 1 million times for pT2 and 500000 times for pt3
Fire protection ul10c and UB (c7-2)
These are the highest standards of door closers in the world and the products sold in the United States and Canada.
TUV - Germany Rhine safety testing laboratory
Implement bsen1154-1999 standard
This is the sales pass for EU and Commonwealth countries and regions
2、 Do you know the difference between door closers and international advanced products?
Currently, ga93-2004 standard is implemented
The requirements for excellent products are 300000 times and 100000 times (the actual products are qualified in this standard, and many manufacturers are far below it)
The excellence of international standards is 2 million times, and the qualified products are 500000 times
This is the most important gap. Also, the leakage rate is less than 0.1%, and the hydraulic oil can meet the requirements of fire prevention and antifreeze.