Spring band clamps for hose-nozzle connections

from our W.TEC^® product series

Spring band clamps for the industry

Spring band clamps are self-tightening fasteners that are suitable for hose-nozzle connections thanks to their dynamic spring properties. The use of tempered spring steel strip gives the parts a very high degree of flexibility and thus they continually adapt to the changing properties of the operating temperatures and the pressure ratios of the hose and the nozzle. Once the spring band clamp is attached, there is no need to retighten it. With almost constant clamping force, spring band clamps ensure a continuous, leak-proof seal without damaging the hose or nozzle. Due to the large number of different assembly and locking variants, maximum potential applications are possible.

In which industries are spring band clamps used?

Spring band clamps are used primarily in the following industries:

Fluid systems
Engine construction
Hose systems
Commercial kitchens/Industrial dishwashers
Industrial air conditioners
Agricultural machinery
Floor cleaning machines
Campers
Heat pumps
Heating/air conditioning
Sanitary (e.g., toilets for ships, trains, aircrafts)
Food industry (e.g., bakery/coffee machines)
Solar thermal energy
Printing industry
White goods
Construction machinery
LPG plants
Compressors
Industrial trucks
Beverage industry (e.g. bottling plants)

What are the advantages and properties of spring band clamps?

Advantages of spring band clamps for connecting hoses with sockets:

High flexibility through continuous adaptation to changing characteristics, e.g. temperature fluctuations of the fastening elements
Constant, uniform clamping force
Easy installation
No subsequent tightening necessary
High reusability, since spring force is not lost
High process reliability due to the leak-free hose-nozzle connection

Types of spring band clamps

Standard spring band clamp

The standard version is the original version of spring band clamps and suitable for applications without space restrictions. This self-tightening fastener offers a nearly constant contact pressure in a wide range of temperatures and pressure conditions. With the help of pliers, the clamp can be attached and removed for a secure and effective installation.

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Space-saving spring band clamps

The space-saving version has the same features as the standard spring band clamp. Due to the shortened and flattened mounting ends, the spring band clamp is space-optimized. It is advisable to carry out the installation and removal with the help of hose clamp pliers in this case as well.

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Pre-stressed spring band clamp

The space-saving spring band clamp is also available as a pre-opened version with a plastic handy clip. Thanks to the use of handy clips, the installation time is considerably reduced, as no tools are needed. For complete assembly, the clip is removed by simply pulling it off. In addition, this clamp is suitable in case of space limitations.

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Technical features of the spring band clamp

Material

High-strength, alloyed spring steel 51CrV4
High level of protection against brittle fracture, especially at low temperatures

Surface

Multi-layered & environmentally friendly chrome(VI)-free coating
Zinc-containing, inorganic base coat and organic top coat
Complies with the automobile regulations (RoHS compliant)

Corrosion protection

Excellent resistance to corrosion, temperature (up to 210 °C) and chemicals
Guaranteed 720h salt spray resistance according to DIN EN ISO 9227

Available nominal diameters & bandwidths

Nominal diameters 9.0 mm to 90 mm
Bandwidths 8.4 mm, 10 mm & 12 mm

Pressure

Depending on the hose-nozzle combination, connections of up to a maximum of 11 bar can be fastened

Standardisation

DIN 3021 Hose clamps - spring band clamps
DIN 3021-1 Dimensions, designation, materials and design
DIN 3021-2 Technical delivery conditions
DIN 3021-3 System spring band clamp – hose – nozzle

Comparison of clamp variants

Hose clamps
Pro	Contra
Wide diameter range	Rigid system
Cost-effective production for large diameters	High maintenance
High hose pulling forces	Comparatively expensive for small diameters
	Complex and expensive installation tool: torque and closing speed must be controlled
	Risk of injury due to protruding band

Ear hose clamp
Pro	Contra
Corrosion-resistant base material	Very rigid fastener
Small clamp width	Possible hose damage
Low space requirements	Not reusable (destructive dismantling)
High hose pulling forces	Special pliers necessary for installation
Cost-effective	High force required for installation
	Very small working range (highly dependent on diameter)
	The force of the clamp depends on the pressing force of the assembly tool (complex controls required)

Spring band clamps
Pro	Contra
Highly flexible	Dependent on diameter
Simple installation even on hard-to-reach connections	Comparatively high demands on the hose-nozzle system
Very even surface pressure (distribution of radial force)	Hose-nozzle system must be taken into account
Adhesion to the hose possible in pre-opened condition
Protects the hose
Cost-effective
Reusable

Have we sparked your interest? Then request a free sample box of our spring band clamps from the W.TEC^® product line!

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Returnable packaging processing with vending machines

Perfect, e.g. for spring band clamp pliers!

The ORSY^®mat FP flap vending machine can be used for access-protected storing, dispensing and re-stocking machines, tools and other consumables after use.

Returnable packaging processing with vending machines

Perfect, e.g. for spring band clamp pliers!

The ORSY^®mat FP flap vending machine can be used for access-protected storing, dispensing and re-stocking machines, tools and other consumables after use.

Our W.TEC® product series

Our in-house product series W.TEC^® represents our carefully curated selection of products that stand out due to their excellent functionality and top class quality. Each product has been developed with the highest quality standards in order to meet the requirements of the industrial customers. This combination of precision and performance makes the products of our W.TEC^® series price and performance champions.

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