F Series: Double Convolution

Product overviewTEVEMA F Series Air Springs Double Convolution Models

The TEVEMA F Series Air Springs Double Convolution Models are high-performance pneumatic actuators engineered for applications requiring exceptional vibration isolation, load support, and precise motion control. Featuring a double convolution design, these air springs provide enhanced flexibility and superior damping characteristics, making them ideal for demanding industrial environments.

General Characteristics, Actuator Capabilities, and Isolator Properties

MODEL: DOUBLE CONVOLUTION
General Characteristics As Actuator As Isolator
Ø MAX. [mm]
Min. HEIGHT [mm]
Bead plate closure Bead ring closure
Stroke [mm]
Force at 7 bar [kN]
Design HEIGHT [mm]
Natural FREQUENCY AT 6 BAR [HZ]
Type a [mm] b [mm] Type a [mm] BOLT Nº Min. HEIGHT Max. HEIGHT
130 70 1 44.5 80 8 1.6 150 2.72
160 73 1 44.5 107 10 4.5 165 2.20
165 70 1 44.5 90 10 3.8 140 2.57
195 75 2 70 30 125 15 5 165 2.01
220 75 1 70 4 135 M8(x6) 150 17 7 200 1.85
TV-80 G3/4″
TV-80 w/Socket Head Bead Rings
TV-80 w/Coutersunk Bead Rings
244 75 2 89 44.5 4 160.3 M8(x8) 185 27 8 216 1.93
TV-85 G3/4″
TV-85 w/Socket Head Bead Rings
TV-85 w/Coutersunk Bead Rings
260 75 2 89 44.5 4 160.3 M8(x8) 195 28 10 220 1.60
TV-85-E G3/4″
TV-85-E w/Socket Head Bead Rings
TV-85-E w/Coutersunk Bead Rings
310 75 2 157.5 73 4 228.6 M8(x12) 175 40 12 240 1.77
TV-90 G3/4″
TV-90 w/Socket Head Bead Rings
TV-90 w/Coutersunk Bead Rings
350 80 2 157.5 73 4 228.6 M8(x12) 200 40 20 268 1.80
TV-90-E G3/4″
TV-90-E w/Socket Head Bead Rings
TV-90-E w/Coutersunk Bead Rings
310 75 4 185.0 M8(x12) 205 37,0 15,1 250 1,63

General Characteristics, Actuator Capabilities, and Isolator Properties

MODEL: DOUBLE CONVOLUTION
General Characteristics As Actuator As Isolator
Ø MAX. [mm]
Min. HEIGHT [mm]
Bead plate closure Bead ring closure
Stroke [mm]
Force at 7 bar [kN]
Design HEIGHT [mm]
Natural FREQUENCY AT 6 BAR [HZ]
Type a [mm] b [mm] Type a [mm] BOLT Nº Min. HEIGHT Max. HEIGHT
380 75 3 158.8 4 287.3 M8(x12) 225 64 30 240 1.75
TV-100 G3/4″
TV-100 w/Socket Head Bead Rings
TV-100 w/Coutersunk Bead Rings
410 80 3 158.8 4 287.3 M8(x12) 225 65 35 267 1.60
TV-100-E G3/4″
TV-100-E w/Socket Head Bead Rings
TV-100-E w/Coutersunk Bead Rings
420 75 4 350.8 M10(x18) 175 78 35 240 1.68
TV-110 w/Coutersunk Bead Rings
445 87 4 350,8 M10(x18) 183 93.00 39,7 240.00 1,73
TV-110-E/4 w/CS Bead Rings
460 80 4 350.8 M10(x18) 240 92 30 250 1.57
TV-110-E/2 w/CS Bead Rings
520 85 4 419.0 M10(x24) 180 119 77,1 240 1,50
TV-60-2 w/Socket Head Bead Rings
575 80 4 482.6 M10(x24) 200 160 85 240 1.60
TV-118-2 w/Socket Head Bead Rings
TV-118-2 w/Coutersunk Bead Rings
707 80 4 597 M10(x32) 230 240 130 267 1.43
TV-130-2 w/Socket Head Bead Rings
950 110 4 830 M10(x40) 225 445 310 279 1.40
TV-140-2 w/Socket Head Bead Rings

Key Features

  • Double Convolution Design: Offers increased stroke length and flexibility compared to single convolution models, allowing for greater movement and alignment adaptability.
  • High Load Capacity: Capable of supporting and lifting heavy machinery and equipment with ease.
  • Superior Vibration Isolation: Effectively reduces vibrations and shocks, enhancing equipment longevity and operational efficiency.
  • Durable Construction: Built with robust materials to withstand harsh conditions and continuous use in industrial settings.
  • Maintenance-Free Operation: Designed for long-term reliability with minimal maintenance requirements.
  • Versatile Applications: Available in various sizes and configurations to meet specific application needs.

Specifically Developed For

The F Series Double Convolution Models were specifically developed to meet the rigorous demands of heavy-duty industrial applications that require both high load-bearing capacity and excellent vibration damping. The double convolution design allows for greater axial and angular flexibility, making these air springs particularly effective in applications where movement and misalignment are common. Ideal Industries:

  • Automotive Manufacturing: Utilized in assembly lines, stamping presses, and testing equipment where precise motion control and vibration isolation are critical.
  • Mining and Quarrying: Applied in heavy machinery such as crushers and vibrating screens to reduce shock and extend equipment life.
  • Industrial Machinery: Ideal for presses, conveyors, and vibrating tables to enhance performance and reduce maintenance costs.
  • Maritime and Offshore: Used in equipment subjected to dynamic loads and movements, providing stability and support in challenging environments.
  • Aerospace Testing Facilities: Employed in vibration isolation platforms and testing rigs that require precise control and damping characteristics.

Difference Between F Series and D Series Double Convolution Models

When comparing TEVEMA’s F Series and D Series Double Convolution Air Springs, several technical specifications distinguish the two, making each series optimal for specific industrial applications. Below is a detailed technical comparison.

1. Load Capacity (Maximum Load):

  • F Series: Designed to handle higher maximum loads, typically ranging from 3 to 30 tons depending on the specific model. This makes them suitable for supporting heavy machinery and equipment where space constraints favor double convolution designs.
  • D Series: Suited for moderate loads, with maximum load capacities generally ranging from 0.5 to 15 tons, ideal for standard industrial machinery and equipment.

2. Operating Pressure Range:

  • F Series: Capable of operating at higher nominal pressures, usually up to 8 bar (116 psi). The higher pressure capacity allows for greater force output and load support.
  • D Series: Operates effectively at standard air pressure ranges, typically up to 6 bar (87 psi), sufficient for applications with moderate force and load support requirements.

3. Effective Diameter and Area:

  • F Series: Features larger effective diameters (e.g., 150 mm to 600 mm), resulting in a greater effective area for force transmission.
  • D Series: Comes with smaller effective diameters (e.g., 80 mm to 400 mm), suitable for applications needing less force.

4. Stroke Length (Maximum Usable Stroke):

  • F Series: Offers extended maximum stroke lengths, potentially up to 300 mm, accommodating greater vertical movement within a compact design compared to triple convolution models.
  • D Series: Provides shorter maximum stroke lengths, up to 200 mm, adequate for applications with limited vertical displacement.

5. Natural Frequency and Spring Rate:

  • F Series: Exhibits lower natural frequencies (e.g., 1.5 to 3.0 Hz), enhancing vibration isolation capabilities, especially for heavy loads and sensitive equipment.
  • D Series: Has higher natural frequencies (e.g., 3.0 to 5.0 Hz), suitable for applications where less vibration isolation is acceptable.

6. Material Composition:

  • F Series: Constructed with high-strength rubber compounds reinforced with multiple layers of synthetic cords (e.g., nylon or aramid fibers), providing superior tensile strength and durability.
  • D Series: Made with standard rubber compounds and fewer reinforcement layers, offering reliable performance for typical industrial environments.

7. End Closure Design:

  • F Series: Equipped with heavy-duty steel bead rings and end closures, often treated with anti-corrosive coatings for enhanced longevity in harsh conditions.
  • D Series: Utilizes standard end closures and bead rings suitable for moderate stress levels and less aggressive environments.

8. Temperature Range:

  • F Series: Capable of operating in a wider temperature range, from -50°C to +70°C (-58°F to +158°F), due to specialized rubber formulations.
  • D Series: Suitable for standard temperature ranges, typically from -30°C to +60°C (-22°F to +140°F).

9. Maximum Allowable Misalignment:

  • F Series: Designed to accommodate greater angular misalignments up to 12 degrees and lateral misalignments due to their flexible construction.
  • D Series: Allows for standard angular misalignments up to 6 degrees, appropriate for less demanding setups.

10. Burst Pressure

  • F Series: Higher burst pressure ratings, often exceeding 25 bar (362 psi), ensuring safety and reliability under extreme conditions.
  • D Series: Standard burst pressure ratings around 18 bar (261 psi), adequate for typical operating conditions.

11. Dynamic Capabilities:

  • F Series: Better suited for high-frequency dynamic applications involving rapid load changes due to superior damping characteristics and material resilience.
  • D Series: Suitable for static or low-frequency dynamic applications with less intense operational cycles.

12. Fatigue life:

  • F Series: Offers an extended fatigue life exceeding 1 million cycles, thanks to enhanced materials and robust construction, making them ideal for continuous operation.
  • D Series: Provides reliable fatigue life for applications with normal operating cycles, generally up to 500,000 cycles.

Technical Data Comparison Table

Specification F Series Double Convolution D Series Double Convolution
Maximum load capacity:
3 – 30 tons
0.5 – 15 tons
Operating pressure range:
Up to 8 bar (116 psi)
Up to 6 bar (87 psi)
Effective diameter:
150 mm – 600 mm
80 mm – 400 mm
Maximum stroke length:
Up to 300 mm
Up to 200 mm
Natural frequency:
1.5 – 3.0 Hz
3.0 – 5.0 Hz
Temperature range:
-50°C to +70°C (-58°F to +158°F)
-30°C to +60°C (-22°F to +140°F)
Material composition:
Reinforced Rubber with Synthetic Cords
Standard Rubber with Fewer Reinforcements
End Closure Material:
Heavy-Duty Coated Steel
Standard Steel
Burst Pressure:
>25 bar (362 psi)
~18 bar (261 psi)
Misalignment capability:
Up to 12 degrees angular
Up to 6 degrees angular
Fatigue life:
>1 million cycles
Up to 500,000 cycles
Dynamic applications:
Highly suitable
Moderately suitable

Summary of Technical Differences

Higher Load and Pressure Handling:

  • The F Series Double Convolution models can support heavier loads and operate at higher pressures due to their reinforced construction and superior materials.
  • The D Series is suitable for standard load capacities and operating pressures appropriate for common industrial applications.

Enhanced Vibration Isolation:

  • The F Series offers lower natural frequencies, resulting in better vibration isolation, essential for protecting sensitive equipment and improving operator comfort in heavy machinery.
  • The D Series provides effective vibration isolation for standard frequencies encountered in typical industrial applications.

Greater Flexibility and Stroke Length:

  • The F Series accommodates larger movements and misalignments, making it suitable for applications with significant structural or load-induced displacements within a compact design.
  • The D Series offers sufficient flexibility for applications where less vertical movement and misalignment accommodation are required.

Material and Construction:

  • The F Series uses advanced materials and additional reinforcement layers, resulting in better durability, higher burst pressures, and extended fatigue life.
  • The D Series utilizes standard materials and construction techniques suitable for less demanding environments.

Temperature Resilience:

  • The F Series operates effectively in more extreme temperatures, expanding its applicability in harsh environmental conditions.
  • The D Series performs well within standard industrial temperature ranges.

Dynamic Performance:

  • Enhanced damping characteristics make the F Series ideal for applications involving rapid load changes and high-frequency vibrations.
  • The D Series is suitable for static or low-frequency dynamic applications.

Application Suitability:

  • Due to these technical advantages, the F Series is better suited for heavy-duty, high-performance applications in industries such as mining, construction, automotive manufacturing, and heavy machinery.
  • The D Series remains an excellent choice for general industrial applications with moderate demands, including standard manufacturing equipment and conveyor systems.

Conclusion

By focusing on these technical specifications, engineers and equipment designers can select the appropriate air spring model that meets the precise demands of their application, ensuring optimal performance, safety, and longevity. The F Series Double Convolution Models offer superior capabilities for demanding environments, while the D Series Double Convolution Models provide reliable performance for standard applications.

Note: The technical specifications provided are based on typical values for TEVEMA’s F Series and D Series Double Convolution Air Springs. For exact specifications and to select the right model for your specific application, please consult TEVEMA’s official product catalogs or contact their technical support team. Get in Touch for Tailored Solutions To discover how the TEVEMA F Series Air Springs Double Convolution Models can enhance your operations, reach out to our expert team today. We are dedicated to providing customized solutions that meet the unique demands of your industry. Let us help you optimize performance, reduce maintenance costs, and achieve superior vibration isolation with our advanced air spring technology.