Sewn flat covers
PEI sewn flat bellows: strong and durable
P.E.I. sewn bellows are very robust and have a very compact closed length in relation to the stroke of the bellows.
These bellows are manufactured with a double seam on the folds.
Since there is no pleat, the accumulation of chips and emulsions on the bellows is avoided.
If the application requires special structural rigidity, profiled metal intermediate elements can be provided for a secure support on the guideway.
Bellows data:
B = Bellows width
a = Bellows height
d = Bellows return
x = Fold height
AP = Fold opening
For this type of bellows, consult our technical department.
Formulae
Formulae for calculating the closed length
Data definition
Formula for the calculation of the CLOSED LENGTH of the sewn flat bellows
- Closed Length = NP x 2,5 + flange thickness
Formula for calculating the N ° of STEPS
- NP = Number of steps = P.A. / AP + 2
Formula for calculating the OPENING of a step
- AP = 1 step opening = (x-8). 1.41
For this type of bellows, consult our technical department
Data definitions
- P.A. = Open Length
- P.C. = Closed Length
Documentation
Documentation
