The United States 3-A is a non-profit voluntary organization (referred to as 3-A SSI), which is committed to promoting the hygienic design of food production equipment, beverage production equipment, dairy equipment, and pharmaceutical industry equipment. It mainly promotes production equipment to contact media Health and safety. We have obtained the certification of 10 series of products of 3-A organization. So far in the field of pump and valve, we are the Asian company who has passed the most certification of this organization, covering ≈ 80% of series products. Manhole series certificate: 3-A-84-02-N.O. 1787, specifically covering: round, oval, square, normal pressure, high pressure and other structures and different pressure levels.
