About PPI


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Diaphragm Compressors

Hydrogen Compressors for Fuel Cell Refueling Stations

Agitated Laboratory Reactors

Dyna/Mag Magnetic Mixers

Custom Reactors and Pressure Vessels

Supercritical Fluid Systems

Other Process Equipment

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About The Company

Since 1954, experts in design, manufacture, and installation of specialty fluid handling equipment -- worldwide

PPI, Milton Roy diaphragm compressors, reactors, pressure vessels and related equipment have proven themselves through years of trouble-free operation in laboratories, pilot plants, and production installations. In fact, engineers in such varied fields as petrochemical processing, pharmaceutical research, polymer chemistry, and energy research consistently specify PPI, Milton Roy products as they expand.

Mazak H-15 machining center

Mazak H-15 horizontal machining center. The machining center has a CRT multi-display, 630 x 630 mm table with 360° indexing, 2-pallet changer, 40 tool magazine, 15 HP DC motor, self-diagnostics system including tool life annunciation and tool breakage auto-detection and autochange, and a rapid traverse 12,000 mm/min X-Y-Z axis.

Reliability in engineering

PPI, Milton Roy is an engineering-based company with decades of experience. Through this wealth of expertise, we have been responsible for many innovative developments in high-pressure equipment, including design concepts that have become not only proprietary patents, but industry standards as well.

Our engineering and design groups develop and analyze each standard or custom product to assure optimum function, safety, and maintainability. With such resources as a fully integrated CAED system, every PPI, Milton Roy design meets stringent internal company standards and can comply with such industry codes as ASME, Section VIII, Divisions 1 and 2.

Reliability in manufacturing

Advanced designs require precise manufacturing. Our manufacturing facilities are equipped with state-of-the-art automated metalworking equipment - often specially modified to work to PPI, Milton Roy's strict tolerances. Experience and hand craftsmanship are als o important factors, especially in the assembly of system components, including piping and instrumentation.

In every case, PPI, Milton Roy's capabilities add value and assure trouble-free service.

Further, each completed product is thoroughly tested. Our test facilities include high-pressure hydrostatic pumps to 200,000 psi (13,500 bar), gas compressors, and mass spectrometer leak detectors.

Reliability in service

No other supplier offers its customers the high level of support available from PPI. With our network of strategically located factory representatives and dedicated customer service representatives at PPI, Milton Roy headquarters, immediate assistance is availa ble. Answers to technical queries, applications assistance, and fast fulfillment of spare parts orders are as close as your phone.

For on-site attention, highly trained field service engineers provide assistance in installation, start-up training, and periodic maintenance and repair.


Turn to Pressure Products Industries, Milton Roy (PPI) for the most efficient gas compressors available. From hydrogen gas compressors to oxygen gas compressors, PPI, Milton Roy manufactures a wide selection of expertly engineered high pressure products for gases and liquids. Our professional engineers and design groups strive for optimum functionality, safety, and maintainability among all of our products. Our manufacturing facilities are equipped with top-of-the-line metalworking equipment to ensure that you receive high quality diaphragm gas compressors, equipment for electronic gases, and more. Contact us today for more information about any of our products and services.


Advanced Specialty Gas Equiment | Custom Chemical Reactors | Cylinder Filling Compressor | Diaphragm Gas Compressors | Gas Compressors | High Pressure Valves & Fittings |
Hydrogen Compressors | Hydrogen Fuel Cell Technology | Oxygen Compressors | Specialty Gas Equipment