D Series: Single Convolution

Product overviewD Series Air Springs Single Convolution Models

TEVEMA’s D Series are high-performance pneumatic actuators designed for precise vibration isolation, reliable load support, and efficient motion control in industrial applications. With their single convolution design, these air springs provide a compact yet robust solution without compromising durability or performance.

Key Features:

  • Construction: Composed of high-quality materials, the single convolution air springs feature an inner and outer rubber cover reinforced with fabric plies and steel beads. These components are vulcanized together to ensure durability and longevity.
  • Vibration Isolation: Offers more than 99% isolation of unwanted vibrations, making them ideal for sensitive industrial equipment.
  • Compact Design: The low installation height allows for compact and versatile integration into industrial setups.
  • Material Options: Available in standard galvanized steel and optional stainless steel (AISI-304 or AISI-316L) for environments with high exposure to acids, chemicals, or cleaning agents.

These air springs are suited for use in a range of industries requiring compact yet efficient solutions for load stabilization and vibration isolation.

General Characteristics, Actuator Capabilities, and Isolator Properties

SINGLE CONVOLUTION
GENERAL CHARACTERISTICS AS ACTUATOR AS ISOLATOR
Ø MAX. [mm]
Min. HEIGHT [mm]
End closure characteristics
Stroke [mm]
FORCE AT 7 BAR [KN]
Design HEIGHT [mm]
Natural FREQUENCY AT 6 BAR [HZ]
Type a [mm] d [mm] Min. HEIGHT Max. HEIGHT
80 50 1 36 78 20 3 1 60 4.6
120 45 2 93 110 45 8 1 70 3.75
165 50 3 127 152 50 10.1 4.6 90 3.08
4 154
215 50 4 156 184 70 18 7.2 105 2.72
260 50 4 181 210 85 26 10.1 120 2.57
310 55 4 232 260 85 41.2 11.5 125 2.52
378 50 4 283 310 115 67 24.9 130 2.46
410 60 4 283 310 130 70 29.5 140 2.16

Key Features

  • The Single Convolution Design: Its structure offers a space-efficient profile, ideal for installations with restricted space.
  • High Load Capacity: Engineered to support significant loads, making them suitable for heavy machinery and industrial equipment.
  • Effective Vibration Isolation: Designed to achieve more than 99% isolation of unwanted vibrations, enhancing the lifespan and performance of the equipment.
  • Durable Construction: Constructed with high-quality rubber and reinforced with fabric plies and steel, ensuring resilience in harsh industrial conditions and long-term continuous operation.
  • Maintenance-Free Operation: The robust rubber bellow design eliminates the need for sliding sealing elements, significantly reducing maintenance requirements and operational costs.
  • Versatile Application: Adaptable to various mounting configurations and compatible with a wide range of industrial uses, including both actuator and isolator applications.

Application Examples

  • Industrial Machinery: Ideal for presses, stamping machines, and assembly lines, offering more than 99% vibration isolation to enhance operational precision.
  • Material Handling Equipment: Improves the performance of conveyors, lifts, and hoists by ensuring smooth motion control and extending machinery lifespan.
  • Automotive Industry: Widely used in manufacturing equipment and testing rigs to increase precision, reduce wear, and ensure uniform movements without stick-slip effects.
  • Mining and Construction Equipment: Delivers reliable vibration isolation for heavy-duty machinery operating under challenging conditions, ensuring safety and performance in extreme environments.

ServicesIndustry focus

Mining and Construction Equipment: Provides robust and reliable vibration isolation for heavy-duty machinery operating in challenging environments. ORIA air bellows offer over 99% vibration isolation, ensuring enhanced safety, operational stability, and extended equipment lifespan under extreme conditions.

Mining and Construction Operations

Manufacturing and Automation

Automotive Production and Testing

Material Handling and Logistics

Difference Between D Series and F Series Single Convolution Models

When comparing TEVEMA’s D Series and F Series Single Convolution Air Springs, several technical specifications differentiate the two, making each series optimal for specific industrial applications. Below is a detailed technical comparison focusing on the single convolution models.

1. Design and Construction:

  • D Series: The D Series Single Convolution models feature a standard design suitable for general-purpose applications. They consist of a single air bellow made from high-quality rubber, reinforced with synthetic cords for durability.
  • F Series: The F Series models are constructed with a reinforced design using high-strength rubber compounds and additional synthetic reinforcement layers, enabling them to withstand higher pressures and mechanical stresses.

2. Load Capacity (Maximum Load):

  • D Series: Designed for moderate load capacities, typically ranging from 0.5 to 5 tons, suitable for standard industrial machinery and equipment.
  • F Series: Engineered to handle higher load capacities, generally ranging from 1 to 10 tons, ideal for heavier machinery and more demanding applications.

3. Operating Pressure Range:

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

4. Effective Diameter and Area:

  • D Series: Available with effective diameters ranging from 80 mm to 300 mm, suitable for applications requiring less force and compact installation spaces.
  • F Series: Features larger effective diameters, from 100 mm to 400 mm, resulting in a greater effective area for force transmission.

5. Stroke Length (Maximum Usable Stroke):

  • D Series: Provides a maximum stroke length of up to 150 mm, suitable for applications with limited vertical displacement.
  • F Series: Offers extended stroke lengths up to 200 mm, accommodating greater vertical movement.

6. Natural Frequency and Spring Rate:

  • D Series: Natural frequencies typically range from 3.0 to 5.0 Hz, suitable for general vibration isolation.
  • F Series: Lower natural frequencies, from 2.0 to 3.5 Hz, enhance vibration isolation capabilities for sensitive equipment.

7. Material Composition:

  • D Series: Constructed with high-quality rubber compounds and standard reinforcement layers for reliable performance in industrial environments.
  • F Series: Utilizes premium rubber compounds with additional layers of synthetic cords (e.g., nylon or aramid fibers) for superior tensile strength and wear resistance.

8. End Closure Design:

  • D Series: Equipped with standard steel bead plates or crimped end closures for moderate stress levels.
  • F Series: Features heavy-duty end closures with anti-corrosive coatings, enhancing durability under harsh conditions.

9. Temperature Range:

  • D Series: Suitable for standard temperature ranges from -20°C to +60°C (-4°F to +140°F).
  • F Series: Operates in a broader temperature range, from -40°C to +70°C (-40°F to +158°F), due to specialized rubber formulations.

10. Maximum Allowable Misalignment:

  • D Series: Allows for angular misalignments up to 6 degrees, appropriate for less demanding setups.
  • F Series: Accommodates angular misalignments up to 10 degrees, owing to its flexible construction.

11. Burst Pressure:

  • D Series: Standard burst pressure ratings around 20 bar (290 psi), adequate for typical operations.
  • F Series: Higher burst pressure ratings exceeding 25 bar (362 psi), ensuring safety under extreme conditions.

12. Dynamic Capabilities:

  • D Series: Best suited for static or low-frequency dynamic applications.
  • F Series: Optimized for higher-frequency dynamic applications with rapid load changes due to enhanced damping properties.

13. Fatigue Life:

  • D Series: Provides reliable fatigue life for normal operating cycles, generally up to 300,000 cycles.
  • F Series: Offers an extended fatigue life exceeding 500,000 cycles, making it ideal for continuous operations.

Technical Data Comparison Table

Specification D Series Single Convolution F Series Single Convolution
Maximum load capacity:
0.5 – 5 tons
1 – 10 tons
Operating pressure range:
Up to 6 bar (87 psi)
Up to 8 bar (116 psi), or 12 bar with a four-ply high-strength construction
Effective diameter:
80 mm – 378 mm
100 mm – 950 mm
Maximum stroke length:
Up to 150 mm
Up to 200 mm
Natural frequency:
3.0 – 5.0 Hz
2.0 – 3.5 Hz
Temperature range:
-40°C to +70°C (Standard NR/SBR material)
-40°C to +70°C (Standard), up to +115°C (with CIIR, NBR, or EPDM materials)
Material composition:
Standard Rubber with Reinforcements
Premium rubber with enhanced reinforcements (option for different elastomers such as NBR, CIIR, EPDM)
End Closure Material:
Standard steel (Optional: Stainless Steel AISI-304 or AISI-316L
Heavy-duty coated steel (Optional: Stainless Steel AISI-304 or AISI-316L)
Burst Pressure:
~20 bar (290 psi)
>25 bar (362 psi)
Misalignment capability:
Up to 6° angular deviation
Up to 10° angular deviation
Fatigue life:
Up to 300,000 cycles
>500,000 cycles
Dynamic applications:
Moderately Suitable
Highly suitable

Summary of Technical Differences

  • Load and Pressure Handling: The F Series Single Convolution models support higher loads and withstand greater pressures than the D Series, making them suitable for heavy-duty applications.
  • Vibration Isolation: With lower natural frequencies, the F Series offers superior vibration isolation, which is essential for protecting sensitive equipment and enhancing operational efficiency.
  • Stroke Length and Flexibility: The F Series provides a longer stroke length and can accommodate greater misalignments, making it advantageous for applications requiring increased movement and flexibility.
  • Material and Durability: Constructed with premium materials and additional reinforcements, the F Series boasts enhanced durability, higher burst pressures, and extended fatigue life.
  • Temperature Resilience: The F Series performs effectively in more extreme temperatures, broadening its applicability in harsh or fluctuating environmental conditions.
  • Dynamic Performance: Improved damping characteristics make the F Series ideal for applications involving rapid load variations and high-frequency movements.
  • Application Suitability:
    • D Series: Best suited for general industrial applications, such as conveyor systems, packaging machinery, and equipment requiring moderate load support and vibration isolation.
    • F Series: Designed for more demanding industries, including automotive manufacturing, material handling, and machinery that requires higher performance and reliability.

Cost Considerations: 

  • D Series: A cost-effective solution for standard applications.
  • F Series: Offers long-term value in demanding environments by reducing maintenance and downtime.

Conclusion

By understanding these technical differences, engineers and equipment designers can select the appropriate TEVEMA Single Convolution Air Spring model that best fits their specific application requirements. The D Series serves as a reliable and economical choice for standard needs, whereas the F Series offers enhanced capabilities for more demanding industrial applications, ensuring optimal performance, safety, and longevity. For assistance in selecting the right air spring model for your specific needs, please contact TEVEMA’s technical support team.