Standard Diaphragms

Diaphragm Type P - dish-shaped diaphragm

Type P Diaphragm

This diaphragm type, commonly referred to as dish-shaped, has a sidewall that slopes gradually from the cylinder to the piston.

Diaphragm Type F - top hat diaphragm

Type F Diaphragm

The Type F is commonly referred to as the “top hat” diaphragm. It exhibits all of the benefits that are associated with rolling diaphragms.

Diaphragm Type FC - piston and flange molded on same plane

Type FC Diaphragm

In this style of diaphragm, the piston and the flange are molded on the same plane.

Diaphragm Type D - non-flange molding

Type D Diaphragm

This diaphragm is the same as the Type F in all respects except flange mounting.

Diaphragm Type DC - hybrid sealing and mounting diaphragm

Type DC Diaphragm

Similar in function to the Type FC diaphragm, while the sealing and hardware designs are the same as the Type D.

Diaphragm Type O and OA - diaphragm with no flange

Type O and Type OA Diaphragms

The Type O diaphragm has no flange. An O-ring is molded to the bottom of the sidewall. The Type OA diaphragm is second generation to the Type O. It fits into identical hardware.

Diaphragm Type OB

Type OB Diaphragm

This type of diaphragm has a rectangular bead molded inside the cylinder wall.

Diaphragm Type I

Type I Rolling Diaphragm

Type I diaphragms are commonly referred to as “Involuted” diaphragms. Type I diaphragms exhibit the benefits associated with rolling diaphragms while combining ease of assembly and allowing a long stroke.