Standard Diaphragms
Type P Diaphragm
This diaphragm type, commonly referred to as dish-shaped, has a sidewall that slopes gradually from the cylinder to the piston.
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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.
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Type FC Diaphragm
In this style of diaphragm, the piston and the flange are molded on the same plane.
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Type D Diaphragm
This diaphragm is the same as the Type F in all respects except flange mounting.
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Type DC Diaphragm
Similar in function to the Type FC diaphragm, while the sealing and hardware designs are the same as the Type D.
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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.
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Type OB Diaphragm
This type of diaphragm has a rectangular bead molded inside the cylinder wall.
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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.
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