Today,QUS valve is one of the biggest gas valve manufactory in China. At QUS we have experience developing the products.at present used in the home and in outdorr areas.We have been selling our valves to USA,RUSSIA,TURKEY,GERMANY ect.all around the word you will see QUS valve in the near future. The QUS valve Life cycle testing 40000times,no block,no crash.turing more smooth and soft when using.Leakage rate ≦0.003L/H.