The api 600 norm defined standard numbers to indentify the trim in terms of combinations of materials for the replaceable parts of the valve.
Api gate valve trim chart.
The trim shall be selected carefully depending on process parameters as fluid working temperature pressure and valve type.
10 000 15 000 psi slab gate valves and gate valves with ball screw operators have unique trim charts.
Installations requiring a through conduit valve.
This will element the requirement of defining material grade for each component.
Trim 1 is still used for api603 gates as well as globe check valves.
The trim of a valve is the set of replaceable parts of a valve.
Special materials trims and configurations are available upon customer request.
In rotational motion trim designs.
This trim chart provides information on materials included in standard valves offered by array.
Data provided in this chart is for informational purposes only.
Because of the trim basic motions and flow control are possible.
10 000 15 000 psi slab gate valves and gate valves with ball screw operators have unique trim charts.
Always consult current api publications to verify information and trim data.
Gate valves are on off valves to open and close the flow of the fluid in a.
Also even though api no longer references trim 2 for api603 gate globe check and in some commodity api600 gate valves in lower classes and under 300nb it is still manufactured as it is specified by.
A valve s trim performance is determined by the disk and seat interface and the relation of the disk position to the seat.
Api 600 trim.
Stainless trim for substantially the same service as t 21 but where the corrosion resistance of 13 chrome stainless steel internal parts are desirable.
Api 600 602 gives the list of trim material that can be used in the valve.
Api trim number material backseat stem notes 1 410 410 410 410 410 2 304 304 304 304 304 3 f310 310 310 310 310 4 hard 410 hard 410 hard 410 410 410 seats 750 bhn min.
Gate valves have forged bodies for bore sizes below 2 inches api 602 bs 5352 and cast bodies for larger sizes api 600 api 603 api 6d.
Trim material such as disk seat stem back sheet and sleeves are grouped together and assigned one number called trim no.
The temperature limitations are 0 degrees to 250 degrees f.
The valve body bonnet packing et cetera that also come in contact with the flow medium are not considered valve trim.
Also usable for mildly corrosive fluids and gases when limited corrosion of the.
Valve trim chart notes.
This trim chart provides information on materials included in standard valves offered by array.
1 api lists as obsolete but still used in the valve industry.
Removable replaceable functional parts of the valve that are exposed to the flow medium such as stem closure member and seating surfaces is termed as trim valve body bonnet yoke does not include in trim the number corresponding to material used in api 600 and api 602 are termed as trim numbers.
