STATIC SEALS are divided into two primary categories: Radial Static type and Face or Flange type.

RADIAL SEALS require the presence of a diametral clearance gap for installation. FACE OR FLANGE type seals have no clearance gap, but consist of a groove cut into one flange with a flat mating flange bolted together to give a surface to surface contact.

There are two types of static radial designs:

1. Male or Plug - the O-Ring groove is located on a plug which is inserted into the housing or cylinder (Fig. 20).
2. Female or Tube - The O-Ring groove is located in the housing or cylinder and a tube is installed through the O-Ring I.D. (Fig. 24).

MALE or PLUG SEAL design is based on the following factors (refer to Fig. 20).