Pressure restrictions
‘O’ rings are generally suitable for
pressures up to 10MPa (1450psi).
Where higher pressures are involved, we
recommend the use of back-up rings as
described on page 12.
For stuffing box applications we
recommend piston-type grooves,
although triangular grooves are generally
acceptable for pressures below 10MPa
(1450psi): see Figures 3 & 4.