Product Overview
The Rotary Heat Exchanger Seal Brush, also commonly known as a thermal wheel seal brush or energy recovery wheel seal brush, is designed to provide flexible sealing between the rotating wheel and surrounding housing of rotary heat exchanger systems. It helps reduce unwanted air leakage around the rotor while allowing continuous wheel rotation.
Unlike conventional metal channel strip brushes, this seal uses a flexible PVC profile combined with high-density yarn. A transparent elastic fin is integrated between the yarn sections to improve contact with the sealing surface, while pre-slotted mounting holes in the PVC profile allow the seal position to be adjusted during installation.
The brush is primarily designed for HVAC rotary heat exchangers, thermal wheels and energy recovery systems. It can be supplied in continuous rolls and customized in different seal dimensions and configurations to match different wheel diameters, housings and installation requirements.
Product Features
- Integrated Elastic Fin – A transparent elastic fin positioned between the yarn sections provides additional contact with the sealing surface and helps reduce air leakage around the rotary wheel.
- Flexible PVC Profile – The flexible backing can follow circular housings and curved installation surfaces, making it suitable for rotary heat exchangers and thermal wheels of different diameters.
- Adjustable Slotted Mounting Holes – Pre-slotted holes in the PVC profile allow the seal position to be adjusted during installation for better alignment and sealing contact.
- High-Density Yarn Seal – Dense yarn provides a flexible sealing surface that maintains contact with the rotating wheel without requiring a rigid brush construction.
- Moisture-Resistant Polyester Yarn – Silicone-treated polyester yarn offers low water absorption and stable performance in humid HVAC operating environments.
- UV-Stabilized Material – The yarn can be supplied with 2% UV protection to improve resistance to degradation in applications where the seal may be exposed to light.
Specifications
| Specification | Available Options |
|---|---|
| Product Type | Rotary Heat Exchanger Seal Brush |
| Profile Material | Flexible PVC |
| Profile Type | 23mm Height and 32mm Height |
| Sealing Material | Polyester Yarn |
| Yarn Treatment | Silicone-Treated |
| Elastic Fin | Transparent Flexible Fin |
| Mounting | Pre-Slotted Adjustable Mounting Holes |
| Seal Height | 11–23 mm |
| UV Protection | 2% UV Stabilizer Available |
| Stitching | 1 or 2 stitches |
| Roll Length | 50 m per Roll |
| Customization | Seal Size, Yarn Configuration and Stitching Customizable |
Materials
Flexible PVC Profile: The backing is made from flexible PVC, allowing the seal brush to follow the curved perimeter of rotary heat exchangers and energy recovery wheels. Pre-slotted mounting holes provide adjustment during installation and help position the seal according to the required contact pressure.
Polyester Yarn: High-density polyester yarn forms the main flexible sealing surface. The yarn can be silicone-treated to improve moisture resistance and can be supplied with UV stabilization for applications where additional resistance to light exposure is required.
Elastic Fin: A transparent flexible fin is positioned between the yarn sections to provide an additional sealing surface. The fin works together with the yarn to maintain contact around the rotating wheel and help reduce air leakage between the rotor and housing.
Applications
Rotary heat exchanger seal brushes are primarily used to provide flexible sealing around rotating heat transfer wheels, helping reduce unwanted air leakage between different air streams and around the rotor housing. The flexible PVC profile makes the seal suitable for circular and curved mounting surfaces.
- Energy Recovery Wheels – Used around the perimeter of energy recovery wheels to maintain flexible sealing between the rotating rotor and stationary housing.
- HVAC Rotary Heat Exchangers – Suitable for rotary air-to-air heat exchangers used in ventilation and energy recovery systems.
- Thermal Wheels – Provides adjustable sealing around thermal wheel housings while allowing continuous rotor movement.
- Regenerative Heat Exchangers – Can be adapted to different wheel diameters and sealing gaps in regenerative heat recovery equipment.
- Custom Rotating Equipment – The flexible profile can also be considered for other rotating or curved equipment where a soft, adjustable brush-type seal is required.
Replacement Seal Brushes for Heat Exchanger Systems
We manufacture replacement seal brushes for rotary heat exchanger and energy recovery wheel systems from brands including HeatEx, Holtop, Klingenburg, Hoval and Recuperator. Seal dimensions and configurations can be customized according to the original brush, equipment dimensions or customer drawings.
Please provide the equipment model, original seal dimensions, drawing or sample when requesting a replacement brush to ensure the correct configuration.
Custom Options
Rotary heat exchanger seal brushes can be customized according to the wheel diameter, sealing gap, mounting structure and operating conditions. For replacement applications, we can manufacture the seal according to the original brush dimensions, technical drawing or sample.
- Seal Height – Different sealing heights are available to match the gap between the rotary wheel and housing.
- PVC Profile – Profile dimensions and mounting configurations can be selected according to the installation structure.
- Yarn Configuration – Yarn density and arrangement can be adjusted according to the required sealing performance.
- Elastic Fin – Fin dimensions and configuration can be customized for different sealing gaps and contact requirements.
- Stitching – The yarn can be supplied with standard stitching or customized stitching according to the application.
- Replacement Brushes – Custom replacement seals can be produced according to the equipment model, original seal, drawing or sample.
Installation
The flexible PVC profile is installed around the perimeter of the rotary heat exchanger housing using the pre-slotted mounting holes. During installation, adjust the seal position so that the yarn and elastic fin maintain suitable contact with the rotating wheel without creating excessive friction.
Preventing Yarn Fraying
After cutting the seal brush to the required length, the exposed yarn at both ends may fray over time. To help prevent this, carefully heat-seal the yarn ends after cutting so that the fibers fuse together and remain secure.
Packing & Shipping
Rotary heat exchanger seal brushes are supplied in continuous rolls for convenient transportation, storage and installation. The flexible PVC profile is carefully coiled and packed to help prevent deformation, dust contamination and damage during transit.
- Roll Length – 50 m per roll
- Packing Quantity – 4 rolls per carton
- Carton Size – 78 × 78 × 20 cm
- Total Length per Carton – 200 m
- Custom Packing – Alternative roll lengths and packing methods can be provided according to order requirements.
For a typical order of 3,000 meters, the production lead time is approximately 15 days. Actual lead time depends on the required specifications, customization and order quantity and will be confirmed before production.
Frequently Asked Questions
What is a rotary heat exchanger seal brush used for?
A rotary heat exchanger seal brush is used to provide flexible sealing between the rotating heat recovery wheel and the stationary housing. It helps reduce unwanted air leakage while allowing the rotor to rotate continuously.
Can you supply replacement seal brushes for Klingenburg, Hoval, HeatEx, Holtop and Recuperator systems?
Yes. We manufacture replacement seal brushes for rotary heat exchanger and energy recovery wheel systems from brands including Klingenburg, Hoval, HeatEx, Holtop and Recuperator. Because specifications can vary between equipment models, please provide the model, original seal dimensions, drawing or sample so we can confirm the correct configuration.
What information do I need to provide for a replacement thermal wheel seal brush?
Please provide seal cross-section dimensions, required length or wheel diameter, and photos or drawings of the original seal. A physical sample can also be used when detailed specifications are unavailable.
Can the seal brush be cut to the required length during installation?
Yes. The flexible seal brush is supplied in continuous rolls and can be cut to the required length during installation. After cutting, the yarn ends should be carefully heat-sealed to help prevent the fibers from fraying.
Can the rotary heat exchanger seal brush be customized?
Yes. Seal height, PVC profile, yarn configuration, elastic fin, stitching and roll length can be customized according to the sealing gap, mounting structure and operating requirements.
