Sewn round bellows
Circular protective bellows
They are used where a very compact closed length is required.
In addition to being very reliable, the sewn circular bellows do not involve equipment costs and ensure high resistance to mechanical and dynamic stress. They are resistant to coolants and oils and have a minimum internal diameter starting from 20 mm.
The sewn circular bellows are suitable for high temperatures and can be made with an external diameter of any size according to the needs. They are available with guide bushings and reinforcement rings.
The sewn circular bellows are the ideal solution for those looking for optimal protection with a good quality / price ratio.
Data
Type A fixing schemes
Bellows with type A fastening system have a collar and a flange
Bellows data:
Ø ext. (OD) = Circular bellow outer diameter
Ø int. c. = Internal collar diameter
Ø int. (ID) = Internal bellow diameter
Ø int.f. = Internal flange diameter
Ø int. hole = Flange hole centre-to-centre diameter
Ø ext. f = Flange outer diameter
P.A. = Open length
P.C. = Closed length
Stroke = P.A. – P.C.
AP = Opening of 1 fold
X = Fold height
Type B fixing schemes
Bellows with type B fastening system have two collars
Bellows data:
Ø ext. (OD) = Circular bellow outer diameter
Ø int. c. = Internal collar diameter
Ø int. (ID) = Bellow internal diameter
P.A. = Open length
P.C. = Closed length
Stroke = P.A. – P.C.
AP = Opening of 1 fold
X = Fold height
Type C fixing schemes
Bellows with the type C fastening system have two flanges
Bellows data:
Ø ext. s. = Circular bellow outer diameter
Ø int. s. = Bellow internal diameter
Ø int. f. = Internal flange diameter
Ø int. hole = Internal flange diameter
Ø ext. f = External flange diameter
P.A. = Open length
P.C. = Closed length
Stroke = P.A. – P.C.
AP = Opening of 1 fold
X = Fold height
Standard Materials
Materials available for the sewn circular bellows
- Polyester coated with Neoprene* (thickness from 0,3 to 1,2)
- Polyester coated with PVC (thickness from 0,3 to 0,7)
- Code PEI TEMAT007: Kevlar* coated with Neoprene* and Hypalon*
- Code PEI TEMAT164-TEMAT165: Kevlar*/Nomex* coated with Polyurethane
- Code PEI TEMAT009: Glass fibre coated with Silicone and Neoprene*
- Code PEI TEMAT011: Aluminiumised fabric
- Code PEI TEMAT081: Polyester coated with PVC thickness 0,5 – WHITE
* Neoprene, Hypalon and Kevlar are Dupont registered trademarks.
Further materials are available on request: consult our technical department.
Formulae
Formulae
Formulas for calculating the closed length
Documentation
Documentation
