The torque (force) required to close the handles on a pair of cam and groove fittings will vary according to the gasket chosen.
Due to the nature of the PTFE® material, the various PTFE® gasket designs will require the most torque, increasing as you go from envelope to encapsulated, and finally, accordion.

PTFE® white Buna filler (TFWB) and PTFE® encapsulated silicone (TES) all contain FDA approved materials.
PTFE® accordion gaskets (TFACC) are recommended for use with viscous (thick) fluids only.
Encapsulated gasket pressure ratings are reduced to 125 PSI for 3/4" - 4" at ambient temperature (70ºF)
PTFE® encapsulated Viton® (TEV) gaskets - maximum operating temperature 200ºF
PTFE® encapsulated silicone gaskets (TES) gaskets - maximum operating temperature 225ºF
Maximum operating temperatures for specific chemicals may be lower.
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Item #

Size

Material

Type

N/A 1/2 in N/A PTFE® with Viton® Filler N/A Envelope
N/A 1/2 in N/A PTFE® with Buna Filler N/A Envelope
N/A 3/4 in N/A PTFE® with Buna Filler N/A Envelope
N/A 3/4 in N/A PTFE® Accordion N/A Accordion
N/A 3/4 in N/A PTFE® with Viton® Filler N/A Envelope
N/A 3/4 in N/A PTFE® Encapsulated Silicone N/A Encapsulated
N/A 3/4 in N/A PTFE® Encapsulated Viton® N/A Encapsulated
N/A 1 in N/A PTFE® Encapsulated Viton® N/A Encapsulated
N/A 1 in N/A PTFE® with Viton® Filler N/A Envelope
N/A 1 in N/A PTFE® Encapsulated Silicone N/A Encapsulated
N/A 1 in N/A PTFE® Accordion N/A Accordion
N/A 1 in N/A PTFE® with Buna Filler N/A Envelope
N/A 1-1/4 in N/A PTFE® Encapsulated Silicone N/A Encapsulated
N/A 1-1/4 in N/A PTFE® with Buna Filler N/A Envelope
N/A 1-1/4 in N/A PTFE® Accordion N/A Accordion
N/A 1-1/4 in N/A PTFE® Encapsulated Viton® N/A Encapsulated
N/A 1-1/4 in N/A PTFE® with Viton® Filler N/A Envelope
N/A 1-1/2 in N/A PTFE® Encapsulated Viton® N/A Encapsulated
N/A 1-1/2 in N/A PTFE® with Ethylene Propylene Filler N/A Envelope
N/A 1-1/2 in N/A PTFE® Accordion N/A Accordion
N/A 1-1/2 in N/A PTFE® Encapsulated Silicone N/A Encapsulated
N/A 1-1/2 in N/A PTFE® with Buna Filler N/A Envelope
N/A 1-1/2 in N/A PTFE® with Viton® Filler N/A Envelope
N/A 2 in N/A PTFE® with Viton® Filler N/A Envelope
N/A 2 in N/A PTFE® Encapsulated Silicone N/A Encapsulated
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