BalancedCartridge constructionCategory 1, Type A, Arrangement 1, 2 or3Dual seals with API Plan 52 / 53(CMSAPI-DAP)Other flush plans availableSeal design according API 682 / ISO21049Shrink-fitted seal facesSingle and dual sealsSingle seal with API Plan 11 and 61(CMSAPI-SA)Solid seatsVersion with independent direction ofrotation available