Api Gate Valve Trim Chart

Trim material such as disk seat stem back sheet and sleeves are grouped together and assigned one number called trim no.

Api gate valve trim chart. The api 600 norm defined standard numbers to indentify the trim in terms of combinations of materials for the replaceable parts of the valve. This trim chart provides information on materials included in standard valves offered by array. Installations requiring a through conduit valve. Gate valves are on off valves to open and close the flow of the fluid in a.

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. Api 600 602 gives the list of trim material that can be used in the valve. The valve body bonnet packing et cetera that also come in contact with the flow medium are not considered valve trim. In rotational motion trim designs.

This trim chart provides information on materials included in standard valves offered by array. 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. 10 000 15 000 psi slab gate valves and gate valves with ball screw operators have unique trim charts. 1 api lists as obsolete but still used in the valve industry.

The trim shall be selected carefully depending on process parameters as fluid working temperature pressure and valve type. Always consult current api publications to verify information and trim data. Stainless trim for substantially the same service as t 21 but where the corrosion resistance of 13 chrome stainless steel internal parts are desirable. This will element the requirement of defining material grade for each component.

The temperature limitations are 0 degrees to 250 degrees f. Special materials trims and configurations are available upon customer request. 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. Data provided in this chart is for informational purposes only.

Valve trim chart notes. 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. The installation of this type of valve creates a modest pressure drop in the pipeline lower than globe valves. The trim of a valve is the set of replaceable parts of a valve.

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. Special materials trims and configurations are available upon customer request. Also usable for mildly corrosive fluids and gases when limited corrosion of the.

10 000 15 000 psi slab gate valves and gate valves with ball screw operators have unique trim charts.