F Series: Triple Convolution

Product overviewF Series Air Springs Triple Convolution Models

TEVEMA’s F Series Air Springs – Triple Convolution Models are high-performance pneumatic actuators designed for heavy-duty industrial applications. Featuring a triple convolution design, these air springs provide superior vibration isolation, load support, and extended stroke capabilities.

Engineered to withstand substantial loads, they ensure exceptional durability even in the most demanding environments. The F Series air springs are available in crimped and bead ring configurations, offering flexibility in installation and application. Additionally, they provide effective noise reduction, extended equipment lifespan, and excellent lateral misalignment absorption, making them an optimal choice for industrial automation, machinery suspension, and vibration isolation applications.

General Characteristics, Actuator Capabilities, and Isolator Properties

MODEL: TRIPLE CONVOLUTION
General Characteristics As Actuator
Ø MAX. [mm]
Min. HEIGHT [mm]
Bead plate closure Bead ring closure
Stroke [mm]
Force at 7 bar [kN]
Type a [mm] b [mm] Type a [mm] BOLT Nº Min. HEIGHT Max. HEIGHT
130 85 1 44.5 140 9 1.8
160 90 1 44.5 175 10 4.6
220 110 1 70 4 135 M8(x6) 240 19 5
TV-83 G3/4″
TV-83 w/Socket Head Bead Rings
TV-83 w/Coutersunk Bead Rings
260 110 2 89 44.5 4 160.3 M8(x8) 250 30 10
TV-88 G3/4″
TV-88 w/Socket Head Bead Rings
TV-88 w/Coutersunk Bead Rings
310 110 2 157.5 73 4 228.6 M8(x12) 250 41 16
TV-93 G3/4″
TV-93 w/Socket Head Bead Rings
TV-93 w/Coutersunk Bead Rings
378 125 3 158.8 4 287.3 M8(x12) 300 69 30
TV-103 G3/4″
TV-103 w/Socket Head Bead Rings
TV-103 w/Coutersunk Bead Rings
420 125 4 530.8 M10(x18) 280 72 39
TV-113 w/Coutersunk Bead Rings
575 115 4 482.6 M10(x24) 300 140 98
TV-118-3 w/Socket Head Bead Rings
TV-118-3 w/Coutersunk Bead Rings
707 115 4 597 M10(x32) 360 220 150
TV-130-3 w/Socket Head Bead Rings
950 140 4 830 M10(x40) 350 400 290
TV-140-3 w/Socket Head Bead Rings

Product Description

The F Series Triple Convolution Air Bellows are designed with a robust structure featuring three convolutions, providing greater flexibility and an extended stroke compared to single or double convolution models. This advanced design allows them to effectively absorb and dampen vibrations across a wide frequency range, making them ideal for applications requiring precise motion control and superior vibration isolation.

Key Features

  • High Load Capacity: Engineered to efficiently support and lift heavy machinery and equipment.
  • Extended Stroke Length: The triple convolution design enables increased vertical movement and flexibility.
  • Superior Vibration Isolation: Provides more than 99% isolation from vibrations and shocks, enhancing equipment longevity and performance.
  • Durable Construction: Manufactured with high-quality materials, offering resistance to wear, corrosion, and fatigue.
  • Maintenance-Free Operation: Designed for prolonged use without the need for frequent servicing.

Specific Development and Ideal Applications

The F Series Triple Convolution Air Bellows have been specifically engineered to meet the demands of industries requiring effective vibration isolation and load management. These air springs are ideal for:

  • Industrial Machinery: Perfect for presses, stamping machines, and other equipment requiring significant vertical motion and superior vibration damping.
  • Mining and Construction Equipment: Designed for heavy-duty machinery operating in demanding environments.
  • Transportation Industry: Used in heavy vehicles and railway systems to enhance load distribution and improve ride comfort.
  • Precision Equipment Isolation: Ideal for isolating sensitive machinery from external vibrations in industrial and manufacturing settings, ensuring optimal performance and longevity.

Development and Industry Focus

The F Series Triple Convolution Air Bellows have been specifically designed to meet the stringent demands of industries such as automotive manufacturing, mining, construction, and heavy machinery. Their capability to withstand extreme loads and deliver outstanding vibration isolation makes them essential for applications requiring maximum reliability and performance.

Difference Between F Series and D Series Triple Convolution Models

When comparing TEVEMA’s F Series and D Series Triple Convolution Air Springs, several technical specifications set them apart, making each series optimal for specific industrial applications. Below is a detailed technical comparison:

1. Load Capacity (Maximum Load):

  • F Series: Engineered to support higher loads, typically ranging from 5 to 50 tons, depending on the model. Ideal for heavy-duty machinery and industrial equipment.
  • D Series: Designed for moderate load capacities, generally ranging from 1 to 20 tons, making them suitable for standard industrial applications.

2. Operating Pressure Range:

  • F Series: Operates at higher nominal pressures, typically up to 8 bar (116 psi), ensuring greater force output and enhanced load support.
  • D Series: Functions effectively at standard pressures, usually up to 6 bar (87 psi), sufficient for applications requiring moderate force.

3. Effective Diameter and Area:

  • F Series: Features larger effective diameters (ranging from 200 mm to 700 mm), providing a greater force transmission area.
  • D Series: Designed with smaller effective diameters (100 mm to 500 mm), suitable for applications with less force requirements.

4. Stroke Length (Maximum Usable Stroke):

  • F Series: Offers extended stroke lengths, reaching up to 450 mm, accommodating greater vertical movement and flexibility.
  • D Series: Has shorter stroke lengths, up to 300 mm, suitable for applications with limited vertical displacement.

5. Natural Frequency and Spring Rate:

  • F Series: Exhibits lower natural frequencies (typically 1.0 to 2.5 Hz), enhancing vibration isolation, particularly for heavy loads and sensitive equipment.
  • D Series: Displays higher natural frequencies (typically 2.5 to 4.0 Hz), ideal for applications where less vibration isolation is required.

6. Material Composition:

  • F Series: Constructed using high-strength rubber compounds reinforced with multiple layers of synthetic cords (such as nylon or aramid fibers), providing superior tensile strength and durability.
  • D Series: Made with standard rubber compounds and fewer reinforcement layers, ensuring reliable performance in standard industrial environments.

7. End Closure Design:

  • F Series: Equipped with heavy-duty steel bead rings and end closures, often anti-corrosion treated for enhanced longevity in harsh operating conditions.
  • D Series: Features standard end closures and bead rings, designed for moderate stress levels and standard industrial environments.

8. Temperature Range:

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

9. Maximum Allowable Misalignment:

  • F Series: Engineered to handle greater angular misalignment (up to 15 degrees) and lateral misalignment, thanks to its flexible construction.
  • D Series: Allows standard angular misalignment up to 8 degrees, sufficient for less demanding applications.

10. Burst Pressure:

  • F Series: Designed with higher burst pressure ratings, often exceeding 30 bar (435 psi), ensuring safety and reliability under extreme conditions.
  • D Series: Has standard burst pressure ratings around 20 bar (290 psi), which is adequate for typical operating conditions.

11. Dynamic Capabilities:

  • F Series: Ideal for high-frequency dynamic applications involving rapid load changes, due to its enhanced damping characteristics and material resilience.
  • D Series: Best suited 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, due to its robust materials and advanced construction, making it suitable for continuous operation.
  • D Series: Provides reliable fatigue resistance for applications with normal operating cycles, typically up to 500,000 cycles.

Technical Data Comparison Table

Specification F Series Triple Convolution D Series Triple Convolution
Maximum load capacity:
5 – 50 tons
1 – 20 tons
Operating pressure range:
Up to 8 bar (116 psi)
Up to 6 bar (87 psi)
Effective diameter:
200 mm – 700 mm
100 mm – 500 mm
Maximum stroke length:
Up to 450 mm
Up to 300 mm
Natural frequency:
1.0 – 2.5 Hz
2.5 – 4.0 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:
>30 bar (435 psi)
~20 bar (290 psi)
Misalignment capability:
Up to 15 degrees angular
Up to 8 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 Capacity: The F Series air springs are designed to withstand heavier loads and operate at higher pressures due to their reinforced construction and premium materials. With a four-ply construction option, they can support pressures up to 12 bar, compared to the standard 8 bar for conventional air springs.
  • Enhanced Vibration Isolation: Thanks to lower natural frequencies and optimized spring rates, the F Series provides superior vibration isolation, which is crucial for protecting sensitive equipment and improving operator comfort in heavy machinery applications. The rubber bellows can absorb over 99% of unwanted vibrations.
  • Greater Flexibility and Stroke Length: The F Series accommodates larger movements, lateral misalignments (up to 30 mm), and structural displacements, making them well-suited for applications requiring greater flexibility. Additionally, they provide tilt motion capabilities up to 25°.
  • Advanced Materials and Construction: The F Series features reinforced rubber compounds and steel bead rings, which enhance durability, increase burst pressure resistance, and extend fatigue life. Available elastomer compounds include NR/SBR, NBR, EPDM, Chlorobutyl (CIIR), and Chloroprene (CR), each offering temperature and chemical resistance advantages.
  • Temperature Resilience: The F Series operates effectively in extreme temperatures, with material options suitable for ranges between -40°C and +115°C, depending on the selected elastomer type. This makes them highly adaptable for use in harsh environmental conditions.
  • Superior Dynamic Performance: With enhanced damping characteristics, the F Series is ideal for applications involving rapid load variations and high-frequency vibrations, ensuring improved stability and performance.
  • Application Suitability: Due to these technical advantages, the F Series is the preferred choice for heavy-duty, high-performance applications in industries such as mining, construction, automotive manufacturing, and heavy machinery. The D Series, while still a reliable option, is better suited for standard industrial applications with moderate load and isolation requirements.

Conclusion

TEVEMA’s F Series Triple Convolution Air Springs offer a robust and efficient solution for industries requiring advanced vibration isolation, superior load management, and high durability. Their specialized design and reinforced construction make them the optimal choice for demanding heavy-duty applications, ensuring long-lasting performance and reliability.