Flex hose of plastic, insulated

Advantages of an insulated hose and acoustical flex duct

Choosing a flexible silencer pipe, you benefit from:

• Insulation sound reduction – reduces noise, prevents condensation and heat loss
• Flexibility – easy to install in tight spaces in new and older buildings
• Durability – suitable for long-term use

If you have spent a lifetime working in agriculture you probably know how noisy extractor fans can be. Acoustic ducting helps prevent it. The same goes for commercial buildings where it dampens machinery and ventilation sounds helping employees stay focused on their job.

Which flex hose should you choose?

When choosing an insulated flex hose, it is important to take dimensions and material into account. Below is an overview of the frequently used sizes and properties:

Soundflex is available in different lengths and diameters:

Some of the things you need to be aware of when buying flex hoses and flex hose connectors are:

• Ambient temperature which in broad terms refers to room temperature or the air temperature surrounding the ventilation equipment
• Maximum air pressure (Pa)
• Maximum air speed (m/s)
• Bending radius

Accessories for flexible hose installation

To ensure safe assembly of a flex hose, it is recommended to use ducting accessories like:

• Hose clamp – secures the flex hose securely to the piping system 
• Hose connection – provides a tight seal and ensures efficient air flow
• TKS tensioning strap
• Flex connection – connects flex hoses in a stable way
• Duct hose – for use in ventilation ducts

We carry vm flex from Vally Matic that guarantees a vibration-free transition. We can deliver TKS stainless steel hose clamps with a galvanized lock. Sizes range from 63/125 mm, 160 mm, 200/250 mm, 315 mm and up to 400 mm. Edbm transfer tensioning straps with rubber seal and leaf spring are also available. They have a locking split feature, so no one will open the handle by mistake.

Or range holds FDB clamping bands in rolls of 30 Meters. Please contact us at info@bels.dk if you wish us to make you an offer on a bunch of 100mm duct silencer, 125mm duct silencer or 200mm duct silencer. We are happy to help you with specific 125mm ducting accessories like a t pipe connector or similar. 

Sound attenuation and insulation hoses are important

As beforementioned, one of the biggest benefits of an insulated flex hose is its ability to reduce noises. This is due to the built-in sound dampening insulation, which improves office and home comfort. Sound attenuation of ventilation is particularly important in noise-sensitive environments such as workplaces and bedrooms. Ventilation noises may cause a lack of sleep. By choosing sound-absorbing insulation, annoying sound resonance is reduced. 

We are proud to provide you with some of the markets finest air duct silencer and components. Take for instance a lindab lrca rectangular silencer which allows you to install it even at a suspended ceiling.

We prioritize quality brands

At Bels-Europe we sell high-quality flex hoses including:

• Nilan flex hose – optimal for energy-friendly ventilation systems
• Thisol and Soundflex – specialized soundproofing and insulation
• Lindab flex hose – known for robustness and flexible assembly

Flex hoses from Nilan ensure easy connection between the unit, distributor box or duct system. They are ideal for shielding roof vent noise, as they can be mounted between unit and return/outdoor air intake.

Thanks to the perforated alu polyester channel inside, sounds are effectively absorbed. For specific planning and design of the ventilation system, please check out https://www.en.nilan.dk/products/accessories/air-distribution/nilan-soundflex. The glass wool insulation layer protects against condensation thus erosion, which occurs as the system cools down.

THISOL from lindab ventilation also has many advantages in terms of design and installation. Thisol ventilation flexible ducting has mineral wool insulation on the inside and plastic on the outside. They are available in 3 Meter length. The 15 mm thick layer of wool works good as a sound absorber. 

Note that it is NOT suitable for areas with condensation. In such cases a VMFPE condensation hose from Vally Matic is more suitable. It ensures optimal kitchen condensation. Due to the insulation layer it works as a sort of kitchen exhaust duct silencer or helps stop condensation from your tumble dryer. 

VMFPE is available with a mf connector and helix thread. The dimensions and capacities are as follows:

Buying flex hoses from us, you also get:

• Help to find the right solution – fill out the contact formula and we will get back to you within 24 hours
• Competitive prices – we are willing to make you an offer strong on large orders
• Fast delivery directly to the door - we deliver stock items day to day