Sundyne PPI Diaphragm Sealless Compressors


Sundyne PPI diaphragm sealless compressors reliability realized...


High Compression Ratio
Sundyne PPI diaphragm process gas compressors are used in applications ranging from vacuum to pressures up to 16,750 psig (1,150 bar). Our diversity of sizes ensures that you can find the right pressure ratio for your application. 

Environmentally Safe
Because Sundyne PPI diaphragm compressors utilize static seals, our crankcases do not need to be purged or vented resulting in absolutely no leakage into the atmosphere making your process safe for the environment.

High Product Purity
Diaphragm compressors are used for contamination-free compression of gases. The process media does not contact the piston or  piston rings that are typically used to generate displacement in conventional compressors. There are no dynamic seals, so contamination from hydraulic oil (typically used for sealing piston rings in reciprocating and screw type compressors) is completely eliminated; thus, making this a truly hermetically sealed compressor. Sundyne PPI diaphragm compressors completely isolate the process media from the piston and related components with a set of metallic diaphragms. The piston moves a column of hydraulic fluid which in turn moves the diaphragm set and displaces the process media. The process side of these units is constructed of compatible corrosion-resistant material to prevent contamination.

Diaphragm Compressors Feature...

State-of-the-art manufacturing
All critical components are manufactured in our United States based factory, assuring the highest levels of quality control. We do accommodate tight delivery schedules to meet your needs

Enhanced Diaphragm Life
All aspects of our diaphragm compressor design are intended to enhance component life, improve operation and reduce and simplify maintenance. Sundyne PPI diaphragm compressors can run for years with routine maintenance and oil changes.

Hydraulic Oil System
The hydraulic system is designed to assure uniform diaphragm deflection, prevent knocks, vibration, cavitation and yield smooth, quiet compressor operation. Unique oil distribution techniques are employed to eliminate pressure differentials and gradients. The system utilizes an automatic priming pump, positive displacement high-pressure injection pump and oil relief valve with bypass valve for smooth, easy starting.

High Product Purity
The triple diaphragm set ensures that the process gas is isolated from the hydraulic oil.

Environmentally Safe
Sundyne PPI diaphragm compressors use static seals so there is no migration of process gas to the crankcase. The crankcase does not require purging or venting, so there is no leakage of process gas to the atmosphere.

Corrosion Resistant Wetted Materials
All process contacting parts are made from stainless steel. This prevents premature failure of the diaphragms resulting in lower spares cost, ease of maintenance and low down-time.

Lower Energy Costs
Multiple compressor product sizes and designs including including two stages reduce horsepower requirements and energy costs. 

Industry Standards
Sundyne PPI sealless diaphragm compressors meet API-618 standards, Reciprocating Compressors for Petroleum, Chemical, and Gas Industry Services.