Thermic-welded tight bellows
Thermic-welded tight bellows
They are used when leak-tight protection of the components (i.e. screws, shafts, etc.) is necessary against the contamination made by coolants.
They have good chemical and heat resistance according to the properties of the materials used. Thermic-welded tight bellows are available in various shapes and dimensions.
Small tooling costs for new moulds should be considered, if not already available in stock.
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. (OD) = Circular bellow outer diameter
Ø Int. (ID) = 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
- Code PEI: TEMAT 018 Polyester coated in PVC thickness 0.7
- Code PEI: TEMAT 019 Polyester coated in PVC thickness 0.5
- Code PEI: TEMAT 153 POLYURETHANE leaf thickness 0.5
- Code PEI: TEMAT 153/S POLYURETHANE leaf thickness 0.7
- Code PEI: TEMAT 156 POLYURETHANE leaf thickness 0.5
- Code PEI: TEMAT 081 Polyester coated in PVC thickness 0.5 – WHITE
Further materials are available on request: consult our technical department.
Formula
Formula
Formula for calculating closed length
Questionnaires
Documentation
