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Customers rely on us to help select components, design complex systems, to manufacture, install, and maintain machinery and equipment. We offer our best advice through our blogs.

The Hope Group

The Hope Group is an authorized full-line Parker distributor featuring hydraulic, pneumatic, fluid connector, and sealing products for OEM and MRO applications.

Sorensen Systems is a designer/builder of custom systems providing clean water, renewable energy sources, and technologically advanced process systems for industry.

Hope Air Systems is an authorized distributor for Kaeser Compressor featuring energy efficient rotary screw compressors as well as a designer/builder of skid-mounted packaged compressed air systems.

Hope Service can dispatch its field service fleet of vehicles and experienced, factory-trained technicians to provide emergency and routine field service to its hydraulic, electrical, and compressed air systems customers.

The Hope Group owns and operates eight Parker Stores at its branch locations providing "while you wait" replacement of hose assemblies and immediate on-hand access to 3,000 Parker fluid connector parts.

The Hope Group provides 24 hour access to $150 million of Parker parts through its eCommerce website,, offering one or two-day shipping of all your hose & fittings, hydraulic, pneumatic, valve, and filtration needs.

iPower Distribution Group of New England provides supply chain consulting and implementation through streamlined procure-to-pay process, vendor managed inventory (VMI), Kanban, and in-plant buyer-planner services.


Hope Air Systems Home › PET › PET Air Boosters
Our Best Advice

Peter Rhoten   10 Worst Things You Can Do To Your Air Compressor
Peter Rhoten
Hope Air Systems

Ray-McCann   Monitoring Operational Conditions In The Palm Of Your Hand
Ray McCann
Fluid Power Specialist

mike-gardella   Sorensen Systems Designs Aerospace Fluid Control Test Stand
Mike Gardella
VP Engineering & Mfg

Donna-Tibbetts   One of Our Stores is Open 24 Hours a Day!
Donna Tibbetts
Operations & Service Mgr

doug-markham-ipower-new-england   When Should Materials be Stocked at Point of Use?
Doug Markham
President, iPower NE


PET Air Boosters

The Kaeser Sigma PET Air System, which provides high quality compressed air for PET bottle blowing applications, requires the use of Kaeser air boosters and air compressors as part of the skid-mounted package. The Kaeser single-stage booster adds the further supply of air at 7 to 10 bar needed to operate the pneumatic cylinders and conveying systems.

Compressed air, at a high quality, is essential for the manufacture of packaging material made from PET (polyethylene terephthalate). The blow-molding process by which PET containers (like soft drink containers) are produced requires compressed air at pressures ranging from 15 to 43 bar depending on the particular product. The extra air needed beyond that, which comes from the booster stage, is used in the high pressure stage for the blow molding process.

The Kaeser Sigma PET Air system requires a low investment cost and provides outstanding reliability. The combination of highly efficient rotary screw compressors with 1:1 direct drive and single-stage compressed air boosters significantly reduces energy consumption.

Hope Air Systems is proud to feature the innovative and highly reliable family of Kaeser Compressor components. Among the outstanding features are the following:

Energy-Saving Screw Compressors

The energy-saving Sigma Profile was developed and optimized by Kaeser Compressors and provides the basis for production of control and process air.

High-Efficiency Boosters

The booster compression ratios are kept to a minimum by precisely matching the booster to the screw compressor performance, which in-turn improves energy efficiency.

Certified Compressed Air Quality

The quality of the technically oil-free air produced by the Sigma PET Air system is tested and certified by the German Technical Inspection Authority. The oil and solid particle content is reliably kept below ISO 8573-1 class 1 limits.

Complete Air Receiver

High and low pressure air receivers are both equipped with all necessary fittings, including an electronic condensate drain.

Automatic Control

The Kaeser Control monitoring and control unit is located in the central switching cabinet, which also contains the booster controller and fuses for
all drives.


Kaeser Booster
When greater volumes of air are needed at pressures up to 45 bar then the larger Kaeser booster models are a natural choice. The core of these boosters is the high-precision, two or three cylinder compressor block with its specially finished high quality cylinders.


The Hope Group, a division of KLX Inc. | 70 Bearfoot Road, Northborough, MA 01532

Phone: 508-393-7660 | Fax: 508-393-8203 | Email

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