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High Pressure Cylinder for PET Blow Molding Machine, 40 Bar

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At VPC Pneumatic, we specialize in manufacturing Heavy Duty Stretch Cylinders, Nozzle Cylinders, and Mold Clamping Cylinders designed specifically for the rigorous demands of the PET industry. Unlike standard air cylinders, our units are engineered to operate reliably at 25-40 Bar (up to 580 PSI).

We provide 100% interchangeable replacements for major European and Chinese blowing machine brands. If your original parts are discontinued or too expensive, VPC is your best alternative solution.
  • VPC Pneumatic

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Product Description

■ Product Feature

1. Extreme Pressure Resistance (40 Bar Ready): Built with thickened hard-anodized aluminum tubes and reinforced stainless steel piston rods. Our cylinders handle high-pressure blowing air with zero deformation and zero leakage.


2. Food-Grade Compliance (FDA Approved): Safety is our priority. We use food-grade H1 grease and specialized seals to ensure no oil contamination enters your PET bottles—critical for beverage and pharmaceutical packaging.

3. High-Speed Performance: Equipped with premium seals (Parker/Mitsubishi) to support high-frequency operation (>2,000 cycles/hour), ensuring your machine runs at full capacity.

4. Universal Compatibility (Customization): Every machine is different. We support non-standard customization. Just provide the bore size, stroke, and mounting type, and we can replicate the cylinder to fit your Sidel, Krones, Tech-Long, or Newamstar machines perfectly.


Applications

1. Rotary Blow Molding Machines: Main stretch units.

2. Linear Blow Molding Machines: Clamping and nozzle units.

3. Industries: Mineral Water, Carbonated Soft Drinks (CSD), Edible Oil, Pharmaceuticals, Cosmetics.



Product Specifications

Bore(mm)3240506380100125Customizable
Cylinder typehigh pressure stretch / Nozzle / Clamping 
Acting typeDouble acting, Single acting
Working mediumClean air (40um Filteration)
Working pressure0.1 to 1.0Mpa
Working temperatureNBR seal: -10 to +80℃
Environmentally resistant: -40 to +90℃ and -10 to +150℃
LubricationSemi-synthetic grease
Stroke (mm)50-1000mm (customizable per drawing)
Expected life3,000 miles without additional, lubrication when properly applied
Cylinder body materials304L / 316L Stainless steel or Aluminum alloy
Sealing materialsNBR / TPU / Viton (FKM) 

※ If you need drawings or more detailed technical specifications of custom air cylinders, please contact VPC.


FAQ

Q1: Can you replace the cylinder if I don't know the original part number?

A: Yes. We offer customization services. You only need to provide the main dimensions (Bore, Stroke, Mounting thread, and overall length) or send us the physical sample. We will manufacture an exact replica.


Q2: What represents the life cycle of your high-pressure cylinders?

A: Under normal operating conditions with clean air supply, our blowing cylinders are tested to exceed 5 million cycles. We use imported seals to ensure durability.


Q3: Do you supply repair kits for these cylinders?

A: Yes, we supply full seal kits (repair kits) for all cylinders we manufacture, helping you lower long-term maintenance costs.


Q4: Do you supply other pneumatic components for PET blow molding machines besides cylinders?

A: Yes, VPC Pneumatic is a one-stop solution provider for the PET industry. Beyond high-pressure cylinders, we manufacture a complete range of 35 Bar [(508 PSI), and Max. pressure 40bar (580psi)] components, including:


Q5: Can you provide solenoid valves that handle 40 Bar pressure for the blowing unit?

A: Absolutely. Our High-Pressure Solenoid Valves (2/2-way or 3/2-way) are engineered specifically for bottle blowing. They feature:

  • Working Pressure: Up to 4.0 MPa (40 Bar).

  • High Flow Rate: Large orifice design for rapid inflation and exhaust.

  • Fast Response Time: Critical for high-speed machines producing >2,000 bph.

  • They are perfect replacements for Parker, Seitz, or Eugen Seitz valves used on Sidel/Krones machines.


Q6: What kind of air fittings and tubing should I use for high-pressure blowing applications?

A: For safety and durability under 40 Bar pressure, standard plastic fittings are not recommended. VPC supplies:

  • All-Metal Fittings: Stainless steel (316L/304) or nickel-plated brass fittings that withstand high pressure and vibration without popping out.

  • High-Pressure Tubing: Industrial-grade Nylon (PA12) or rigid PU tubing designed for high-pressure air circuits.


Q7: Do I need special air preparation units (Filters/Regulators) for my blowing machine?

A: Yes. Contaminants like oil and water can ruin your PET bottles and damage the cylinder seals. We offer High-Pressure FRL Units (Filter, Regulator, Lubricator) rated for 30-40 Bar.

  • Filtration: 5μm or 0.01μm precision to ensure food-grade air quality.

  • Regulation: Stable pressure control to ensure consistent bottle wall thickness.


Q8: Why Choose VPC for Your Blowing Machine Spare Parts?

Cost-Effective: Save up to 50% cost compared to buying original spare parts from machine manufacturers.

Fast Delivery: We stock raw materials for common sizes. Custom orders can be ready in 7-10 days (vs. 8 weeks for European brands).

Reverse Engineering Service: Don't have a part number? Send us a photo of your old cylinder and key dimensions. Our engineers will create a drawing for you to confirm before production.




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 : 0086-574-28872277
  : 0086-13989308920
 : sales@vpc-pneumatic.com
 : No. 99 Shanshan Road, Wangchun Industrial Zone, Ningbo, China

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