HVAC systems demand precise vibration isolation, height control, and noise reduction for optimal efficiency. Our engineering team continuously refines how air bellows integrate into these systems. Instead of rigid actuators or traditional springs, we rely on high-performance air springs for both isolation and actuation. With their uniform movement, compact design, and ability to handle variable loads, air bellows offer unparalleled performance. Tevema’s air bellows provide a versatile solution in HVAC settings. With flexible geometry, resilient elastomers, and galvanized or stainless steel components, they adapt to numerous configurations. Their ability to maintain consistent natural frequency—even with fluctuating pressure—enhances system longevity and minimizes maintenance. Our designs prioritize thermal endurance, chemical resistance, and vibration dampening, critical factors for sustainable HVAC operation. Each unit supports pressures up to 12 bar, with convolution designs offering strokes up to 375 mm and load capacities over 450 kN, enabling use in extreme HVAC scenarios.
Enhanced vibration isolation for sensitive HVAC installations
Vibration can severely affect HVAC unit longevity and comfort. Our air bellows are specially designed to deliver over 99% vibration isolation by utilizing natural frequency tuning. Unlike rigid mounts, Tevema air springs adjust dynamically to load changes without requiring recalibration. This leads to significantly lower structure-borne noise and enhances acoustic insulation across all frequency bands. We use multi-ply elastomers, typically with chlorobutyl or EPDM, that absorb energy while maintaining elasticity. These compounds withstand ozone exposure, temperature variations, and chemical environments, which are common in HVAC systems. Depending on convolution type, the natural frequency remains within 1.2 to 4.6 Hz, optimizing isolation efficiency. Our designs accommodate single, double, and triple convolution forms, all optimized for resonance suppression. The result is a vibration isolator that doesn’t degrade under thermal cycling or moisture exposure. Our steel-beaded terminations are vulcanized to eliminate detachment risks, even under high-pressure loads or constant cycling.
Constant height control under fluctuating loads
One of the critical challenges in HVAC systems is height instability due to fluctuating pressure or load. Our air bellows feature automatic height control by adjusting internal air pressure. Whether under variable fan speeds or changing external temperatures, our products maintain a consistent working height, ensuring equipment balance and efficiency. The crimped and bead ring assemblies available in our product families allow precise fitment without movement or slipping. Each configuration supports top and bottom mounting plates, with threaded holes or blind nuts for integration. This structure guarantees tight sealing, preventing air leaks and enabling pressure stability over time. Convolution heights range from 50 to 140 mm, and stroke lengths vary between 20 to 375 mm, depending on model. These variations allow custom adaptation to HVAC load conditions. Additionally, the air bellow’s flexible geometry accommodates minor lateral or angular displacement, reducing mechanical stress and maintaining predictable load paths in operation.
Superior noise reduction through damping geometry
Noise reduction is a core advantage of Tevema’s air bellows in HVAC configurations. By combining internal rubber damping with a naturally tuned low-frequency response, our products drastically reduce transmitted mechanical vibrations. In contrast to conventional springs, which amplify high-frequency vibrations, our air springs act as acoustic decouplers. The bellows’ multi-ply design, especially in the three-convolution versions, increases damping efficiency. Internal pressure control further supports this behavior by enabling custom tuning of frequency response. Frequency tuning within 1.4 to 3.9 Hz enables broad-spectrum acoustic absorption. In rooftop HVAC installations or wall-mounted air handlers, this directly translates to quieter operation. All bellows include galvanized or AISI-304 stainless steel components, depending on environmental exposure needs. The ability to resist corrosive cleaning agents and acidic condensates ensures no degradation in performance. Whether placed indoors or outdoors, our air springs retain isolation characteristics and noise suppression levels over extended periods.
Broad pressure compatibility for HVAC demands
HVAC systems often operate under variable pressure profiles, especially when dealing with seasonal thermal loads. Our air bellows are engineered to function up to 8 bar with standard configurations, and up to 12 bar using our high-strength four-ply variants. This allows integration in both low-pressure duct systems and high-pressure chamber isolators. All units are tested under certified factory procedures and maintain pressure stability across temperatures from -40 °C to +115 °C, depending on compound type. Our material selection supports natural rubber, nitrile, and chlorobutyl compositions, depending on chemical resistance and temperature profile. These variations allow us to tailor solutions for humid environments, refrigerant-laden zones, and mechanical rooms. Load capacities per bellow range from 0.5 to 450 kN, enabling both small unit support and large system suspension. Convolution height, frequency, and pressure resistance are balanced during design to meet various mechanical demands.
Low-maintenance design and extended service life
Tevema air bellows are designed to be maintenance-free under normal HVAC use. The absence of sliding seals eliminates wear zones typical of hydraulic or pneumatic cylinders. Combined with robust elastomers, our designs provide service lifespans beyond ten years under standard conditions. Each model is constructed with corrosion-resistant end closures, with electro-galvanized or AISI-304 stainless steel options for harsher HVAC environments. Threaded studs, blind nuts, and countersunk holes offer multiple installation methods. Sizes range from 80 mm to 950 mm in outer diameter, covering almost all standard HVAC footprints. With proper installation and environmental shielding, component performance does not degrade over time. Storage and handling of these components follow ISO 2230 guidelines, ensuring rubber quality preservation before deployment. We advise placing them away from ozone-generating devices and maintaining moderate temperature and humidity during storage. This maintains their internal elasticity and external sealing characteristics, allowing for trouble-free long-term operation.
Seamless integration and angular adaptability
Unlike rigid actuators, air bellows are flexible by design, accommodating up to 25° tilt and 30 mm lateral misalignment. This flexibility is critical in uneven HVAC basements, suspended units, and multi-platform systems where perfect alignment is hard to achieve. Our bellows self-align under pressure, reducing installation precision requirements. Triple-convolution versions further boost angular adaptability. The increased stroke capacity and high energy absorption of these designs make them ideal for vibrationally sensitive structures like cleanrooms and server rooms. Each version is pressure-tested and assigned maximum working stroke limits to avoid overextension. Tevema offers bellows with diameters from 80 mm to 950 mm, meeting nearly any design envelope. Threading options include BSP, NPT, and metric blind nuts. These ensure full compatibility with existing HVAC mountings. Whether retrofitting older units or specifying new builds, these air bellows offer modular adaptability and mechanical tolerance compensation.
Optimized HVAC performance with Tevema air bellows
Incorporating Tevema’s air bellows into HVAC systems results in measurable performance gains. Engineers can control height, vibration, and noise with a single component. This not only reduces mechanical complexity but also streamlines maintenance and increases system reliability. Our bellows excel where precision, flexibility, and durability converge. They support large load capacities, accommodate various mounting styles, and deliver consistent isolation across decades. Available convolution types allow precise customization of stroke, pressure, and frequency isolation. Sealing systems ensure pressure retention over millions of cycles. Our bellows maintain height deviation of less than 1 mm during dynamic loading, crucial for high-precision HVAC layouts. Their resilience to moisture, heat, and chemical exposure extends operational life and limits service interventions. In critical HVAC settings like industrial cooling systems, precision cleanrooms, or residential high-efficiency units, our bellows offer the best combination of performance and adaptability. By reducing structural load and absorbing dynamic energy, they increase system uptime and minimize lifecycle costs.