JAMESBURY Hydraulic Pneumatic Cylinders SR4/5 VPVL350SR45B

( Brand: Jamesbury ), ( Manufacturer Part Number: VPVL350 ), ( Part Type: Hydraulic Pneumatic Cylinder )

Review JAMESBURY Sr4/5 Used

The **Jamesbury VPVL350 SR4/5 VPVL350SR4/5B** is a high-performance, heavy-duty diaphragm valve engineered for demanding industrial applications where reliability, precision, and durability are paramount. Designed with a robust **350-series stainless steel construction**, this valve is built to withstand extreme pressures, temperatures, and corrosive environments, making it an ideal choice for chemical processing, pharmaceutical manufacturing, food and beverage production, and other critical fluid handling systems. The **SR4/5 series** features a **dual-diaphragm design**, which enhances sealing integrity and reduces the risk of leakage, ensuring consistent performance even under fluctuating operating conditions. The **VPVL350** model incorporates a **full-port design**, maximizing flow efficiency while minimizing pressure drop, which is essential for maintaining optimal system performance in high-volume applications. Its **sanitary-grade finish**, including **polished 316L stainless steel surfaces**, meets stringent hygiene standards, making it suitable for industries where contamination control is non-negotiable. The valve s **quick-connect fittings** and **modular design** allow for easy installation, maintenance, and replacement of components, reducing downtime and operational disruptions. Additionally, the **SR4/5B variant** includes reinforced sealing elements and enhanced actuator compatibility, further expanding its versatility for automated control systems. Whether used in **CIP (Clean-In-Place) or SIP (Sterilize-In-Place) applications**, this valve delivers exceptional performance with minimal maintenance, making it a trusted solution for industries that demand precision, longevity, and uncompromising quality.

### **Pros and Cons of buying a Jamesbury VPVL350 SR4/5 (VPVL350SR4/VPVL350SR45B) Vacuum Pump**

The **Jamesbury VPVL350 SR4/5** is a robust, oil-sealed rotary vane vacuum pump designed for industrial and laboratory applications. Below is a detailed breakdown of its advantages and disadvantages.

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### **Pros**

1. **High Vacuum Performance**

- Achieves final vacuums in the **10 to 10 Torr (mbar) range**, making it suitable for processes requiring moderate to high vacuum levels, such as freeze drying, distillation, and some chemical applications.

- The **SR4/5 series** is optimized for better performance in roughing and medium vacuum stages compared to standard models.

2. **Reliable Oil-Sealed Design**

- Uses **high-quality vacuum pump oil** (often mineral or synthetic) to seal and lubricate the vanes, reducing wear and extending pump life.

- Better sealing capability than dry pumps, making it more effective for handling gases with some moisture or contaminants.

3. **Durable Construction**

- Built with **cast iron or steel housing**, ensuring robustness against vibrations and thermal stress.

- The **rotary vane mechanism** is designed for longevity, especially when properly maintained.

4. **Versatile Applications**

- Works well in **laboratory settings** (e.g., vacuum ovens, filtration) and **industrial processes** (e.g., degassing, packaging, some chemical reactions).

- Compatible with **backing pumps** (if needed) for lower pressure applications.

5. **Moderate Energy Efficiency**

- While not as energy-efficient as modern dry pumps, it operates reliably within its specified vacuum range without excessive power consumption for its capacity.

6. **Aftermarket Support & Availability**

- Jamesbury is a well-established brand with **easy access to replacement parts** (vanes, seals, oil filters).

- Widely used in industries, so finding technicians or spare parts is generally straightforward.

7. **Quiet Operation (Compared to Some Alternatives)**

- Runs at a **moderate noise level** (typically **70 85 dB**), which is acceptable for many industrial and lab environments.

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### **Cons**

1. **Oil Contamination Risk**

- Requires **regular oil changes** (every **1,000 2,000 hours** depending on usage) to prevent oil degradation and contamination of the vacuum system.

- **Oil mist and vapor** can escape if not properly sealed, posing a risk in sensitive applications (e.g., semiconductor manufacturing).

2. **Maintenance Requirements**

- Needs **periodic vane adjustments, seal replacements, and oil filtration** to maintain performance.

- **Filter maintenance** (if equipped) is necessary to prevent debris from entering the pump.

3. **Limited Final Vacuum for Some Applications**

- While strong for **medium vacuum**, it may **struggle in ultra-high vacuum (UHV) applications** (below 10 Torr), where cryogenic or turbomolecular pumps are preferred.

- Not ideal for **high-purity processes** where oil backstreaming is a concern.

4. **Higher Initial Cost Compared to Basic Models**

- More expensive than **entry-level rotary vane pumps** (e.g., basic Lab-Vac or Welch Duo-Seal models).

- **SR4/5 variants** are priced higher than standard VPVL350 models due to enhanced performance features.

5. **Sensitivity to Contaminants**

- **Abrasive or corrosive gases** (e.g., chlorine, ammonia) can damage the pump oil and internal components, reducing lifespan.

- Requires **proper filtration** upstream to protect the pump.

6. **Vibration & Noise Considerations**

- While not excessively noisy, **larger models (like the VPVL350) can produce noticeable vibrations**, which may require mounting on **anti-vibration pads**.

- Not ideal for **precision-sensitive applications** where stability is critical.

7. **Environmental & Disposal Concerns**

- **Used oil disposal** requires proper handling (hazardous waste regulations apply in many regions).

- **Oil leaks** can be messy and require cleanup.

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### **Conclusion**

The **Jamesbury VPVL350 SR4/5** is a **reliable, mid-range vacuum pump** best suited for applications requiring **moderate to high vacuum levels** where **oil sealing is acceptable**. It excels in **industrial and laboratory settings** where durability and consistent performance are priorities, but it is **not ideal for ultra-high vacuum, oil-free, or high-purity environments**.

If your application involves **freeze drying, distillation, degassing, or general industrial vacuum needs**, this pump is a **solid choice** due to its **proven reliability and strong vacuum performance**. However, if you need **ultra-low vacuums, oil-free operation, or minimal maintenance**, you may need to consider **alternatives like dry screw pumps, turbomolecular pumps, or cryogenic pumps**.

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### **Recommendation**

You need a **durable, oil-sealed pump** for **medium to high vacuum applications** (10 to 10 Torr).

Your process **tolerates some oil contamination** (e.g., freeze drying, basic chemical processes).

You require **reliable performance in industrial or lab settings** where maintenance can be managed.

You prefer a **well-supported brand** with easy access to spare parts.

You require **ultra-high vacuum (below 10 Torr)** consider a **turbomolecular or cryogenic pump**.

Your application is **oil-sensitive** (e.g., semiconductor manufacturing, pharmaceutical cleanrooms) opt for a **dry pump**.

You need **minimal maintenance** a **basic rotary vane pump or scroll pump** may be simpler.

Your budget is tight **lower-cost alternatives** (e.g., Welch Duo-Seal) may suffice for less demanding applications.

The **VPVL350 SR4/5 is a well-engineered pump for its intended use**, offering a **good balance of performance, durability, and reliability** but it is **not the best choice for every vacuum application**. Ensure your specific needs align with its capabilities before purchasing.

Details:

Sells new and surplus product develops channels to purchase such. Part Number VPVL350 SR4/5 B. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. Call to use a shipping service other than the ones listed.

All products are guaranteed to be working but may show signs of use if purchasing a used product.

part #: vpvl350 prices

• $99.00-$506.67

specifications hydraulicylind:

• brand: Jamesbury
• mpn: Vpvl350
• part type: Hydraulic Pneumatic Cylinder

offer hydraulicylind:

• options: Ship-to-home
• sold: 0
• started: May 5, 2026
• availability: In Stock
• quantity: 1

shipping hydraulicylind:

• class: Standard
• transit: 25-38 Days
• type: Fixed
• cost: $12.90
• service: Standard

seller hydraulicylind:

• city: 1 Millennium Dr, Willingboro, NJ 08046
• # reviews: 202551
• rating: 99.7%

payments hydraulicylind:

• credit card: Visa
• wallet: Paypal
• other

general hydraulicylind:

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

returns hydraulicylind:

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

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