*4128-514AD MINNESOTA RUBBER QUAD RING

VQ4128 is an AS568-128 black Viton® (FKM) 75 Shore A quad profile Quad-Ring measuring an inside diameter of 1.487 in (37.77 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.693 in (43 mm). In service, this quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

It resists many acids, aromatic hydrocarbons, and engine and transmission fluids. That behavior comes from the compound itself: Viton® (FKM) offers very low compression set at elevated temperature and the industry benchmark where nitrile reaches its thermal limit. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). It should not be specified for service in ketones and esters or hot water and steam.

Common environments for this compound include high-temperature process equipment, semiconductor equipment, and oil and gas.

VQ4128 ships individually. Nominal inside diameter is listed as 1 1/2 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.