BELLOFRAM SS9FBP Diaphragm Air Cylinder 3.4 3.0

( Brand: Bellofram ), ( Manufacturer Part Number: SS9FBP ), ( Part Type: Cylinder ), ( Bore Diameter: 3.4 In ), ( Cylinder Type: Diaphragm Air Cylinder ), ( Stroke Length: 3 In ), ( Unit Type: Unit )

Review BELLOFRAM Diaphragm Air Cylinder 3.4 Inch Bore 3.0 Stroke

The **Bellofram SS9FBP Diaphragm Air Cylinder (3.4" / 3.0")** is a precision-engineered pneumatic actuator designed for demanding industrial applications where reliability, durability, and compact performance are paramount. This stainless steel (SS) model belongs to Bellofram s renowned **SS9 series**, renowned for its corrosion resistance, high-temperature tolerance, and seamless integration into automated systems. The cylinder features a **3.4-inch bore diameter** and a **3.0-inch stroke length**, providing a balanced combination of force output and operational range, making it ideal for applications requiring moderate to heavy-duty motion control in confined spaces. Constructed primarily from **316 stainless steel**, the SS9FBP is engineered to withstand harsh environments, including exposure to moisture, chemicals, and extreme temperatures, ensuring long-term operational integrity without degradation. Its **diaphragm-driven mechanism** eliminates the need for traditional piston rods or seals, reducing friction and wear while delivering smooth, precise linear motion with minimal maintenance. The cylinder s **flanged mounting design** allows for versatile installation, accommodating various mounting orientations and facilitating easy integration into existing machinery or custom fabrication projects. With a robust **air-to-force ratio**, this actuator efficiently converts compressed air into controlled linear displacement, making it suitable for applications such as valve actuation, clamping systems, indexing mechanisms, and automated assembly processes. Additionally, the SS9FBP s **sealed construction** minimizes the risk of contamination, ensuring clean operation in industries like food and beverage, pharmaceuticals, and semiconductor manufacturing. Bellofram s reputation for innovation is evident in the SS9FBP s **modular adaptability**, as it can be paired with optional accessories such as position sensors, speed regulators, or custom end-of-stroke cushions to tailor performance to specific operational requirements. Whether deployed in a cleanroom environment or a rugged industrial setting, this diaphragm cylinder exemplifies Bellofram s commitment to delivering high-performance pneumatic solutions that enhance efficiency, reduce downtime, and extend equipment lifespan.

### **Bellofram SS9FBP Diaphragm Air Cylinder (3.4" / 3.0") Pros and Cons**

1. **High Force-to-Size Ratio** The compact 3.4" bore size delivers strong force (up to 1,000 lbs at 100 PSI) while maintaining a small footprint, making it ideal for tight spaces.

2. **Corrosion Resistance** The stainless steel (SS) construction ensures durability in harsh environments, including exposure to moisture, chemicals, and outdoor conditions.

3. **Sealed and Leak-Proof Design** The diaphragm seals effectively prevent air leaks, reducing maintenance needs and ensuring consistent performance over time.

4. **Versatile Mounting Options** The cylinder can be mounted in multiple orientations (side, end, or pivoting), providing flexibility in application integration.

5. **Low Maintenance** With fewer moving parts than traditional piston cylinders, it requires less lubrication and has a longer operational lifespan.

6. **Quiet Operation** Diaphragm cylinders typically produce less noise compared to piston-type cylinders, making them suitable for sensitive environments.

7. **Cost-Effective for High-Cycle Applications** The durable construction and minimal wear reduce long-term operational costs, especially in automated or repetitive tasks.

8. **Compatibility with Standard Air Systems** Works seamlessly with existing pneumatic systems, requiring no major modifications to existing setups.

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1. **Limited Stroke Length** The 3.0" stroke may be insufficient for applications requiring longer linear movement, potentially necessitating multiple cylinders or a different design.

2. **Higher Initial Cost** Compared to basic piston cylinders, the stainless steel diaphragm model is more expensive upfront, though this is offset by longevity.

3. **Potential for Diaphragm Wear Over Time** While durable, the diaphragm can degrade with extreme temperatures, contaminants, or prolonged use, requiring eventual replacement.

4. **Less Suitable for High-Speed Applications** Diaphragm cylinders may not accelerate or decelerate as quickly as piston cylinders, limiting their use in high-speed automation.

5. **Limited Customization** Standard models offer fewer customization options (e.g., rod materials, mounting styles) compared to some piston cylinder brands.

6. **Sensitivity to Contaminants** While robust, fine particles or moisture in the air supply can accelerate wear on seals and diaphragms if the air system lacks proper filtration.

7. **Lower Force Consistency at Long Strokes** Force output may slightly diminish over the full 3.0" stroke due to diaphragm elasticity, though this is minimal in most applications.

8. **Specialized Installation Requirements** May require precise alignment during mounting to avoid binding or uneven wear, adding complexity to setup.

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The **Bellofram SS9FBP diaphragm air cylinder (3.4" / 3.0")** is an excellent choice for applications demanding **compact size, high force, corrosion resistance, and low maintenance**. Its strengths lie in **durability, leak resistance, and versatility**, making it ideal for industrial, medical, or outdoor pneumatic systems where reliability is critical. However, its **limited stroke, higher cost, and sensitivity to contaminants** may pose challenges for applications requiring **long strokes, high-speed operation, or extreme environmental conditions**.

If your application prioritizes **space efficiency, force output, and longevity** over stroke length or speed, this cylinder is a strong recommendation. For applications needing **longer strokes, higher speeds, or extreme customization**, a piston cylinder or alternative actuator may be more suitable.

- You need a **compact, high-force actuator** for tight spaces.

- Your environment involves **corrosive conditions** (e.g., outdoor, chemical exposure).

- **Low maintenance and leak resistance** are priorities.

- The **3.0" stroke is sufficient** for your application.

- You require **longer strokes** (e.g., >4").

- **High-speed or rapid cycling** is essential.

- Budget constraints make the upfront cost prohibitive.

- Your air supply has **poor filtration**, risking premature wear.

For most **industrial, medical, or general-purpose pneumatic systems** where durability and compactness matter, the **Bellofram SS9FBP is a reliable and efficient choice**. Pair it with a **properly filtered air supply** and **regular inspections** to maximize its lifespan.

Details:

Make Supersized seem small. Type: Diaphragm Air Cylinder. MA: Bellofram SS9FBP Diaphragm Air Cylinder 3.4 Bore 3.0 Stroke: images.

part #: ss9fbp price

• $79.99

specifications hydraulicylind:

• brand: Bellofram
• mpn: Ss9fbp
• part type: Cylinder
• bore diameter: 3.4 In
• cylinder type: Diaphragm Air Cylinder
• stroke length: 3 In
• unit type: Unit

payments hydraulicylind:

• credit card: Discover
• wallet: Google-pay
• other

offer hydraulicylind:

• best offers: True
• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1
• started: March 18, 2026

shipping hydraulicylind:

• carrier: USPS, FedEx
• transit: 3-7 Days
• type: Calculated
• service: USPS Ground Advantage, USPS Priority Mail, FedEx Ground / FedEx Home Delivery, FedEx Standard Overnight
• class: Standard, Expedited, One-day
• cost: $0.00

seller hydraulicylind:

• rating: 100.0%
• city: Rochester, New York
• # reviews: 57145

returns hydraulicylind:

• policy: Returns Accepted
• time: 30 Days
• method: Money back
• paid by: Seller

general hydraulicylind:

• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Hydraulic Pneumatic Cylinders
• condition: Used

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