U.S.A. marks the valve characteristic of the floodgate :
It accords with American National Standard ANSIB16.34 that the product design is made, standard AP16D and API600 of American Petroleum Institute are required.
Structure compactness , small,, rigidity fine sealing safe and reliable.
It is adopt elastic structure not to close piece (floodgate board ),at work can compensation not automatic valve not caused by unusually load or temperature is the out of shape in body. So, it is reliable to seal , and will not produce the board wedge post of the floodgate .
Greater than equaling NPS1011 nominally and openly directly , pressure grades of 400 and nominal to greater than equal NPSS611 , pressure grades of manual valve of 600- 250 directly while being coherent, it holds and makes the device and is furnished with the rolling bearing, open and close it easily.
Subject material,, pieces of material, packing, spacer, material of fastener can according to user's enquiry or actual operating mode terms make up rationally inside.
The valve seat can make wantonly up and close and seal the surface material to mate for the lifting even more type valve seat, require with the operating mode of full foot , lengthen service life .

Second , standard:

Third, the pressure is tested:

Fourth , major part material and performance :

Fifth, mark the main external dimension of the floodgate valve beautifully:

Sixth, mark the main external dimension of the floodgate valve beautifully: