THE PREFERRED CHOICE IN COMPRESSION
PDC Machines has been manufacturing industrial diaphragm gas compressors since 1977. We have developed an extensive line of diaphragm compressors and fully automated turnkey diaphragm process gas compressor systems with installations around the globe.
Diaphragm Compressor Components
Oil Regulating Valve
The oil relief valve limits maximum hydraulic (and thus gas) pressure and assures that the diaphragms completely “sweep” the upper and lower cavity contours to maximize displacement.
Priming Pump
We provide an automatic, positive displacement gear pump. Priming is crankshaft driven and automatic upon start up. This eliminates priming problems that are typically associated with gravity fed pumps.
Injection Pump
PDC Machines provides a plunger type injection system on all motor driven diaphragm units. The injectors are also crank driven and precisely meter hydraulic fluid flow during the operation of the compressor.
Cavity Design
The deflection and resultant stresses in the metal diaphragms are controlled by carefully designed cavity contours. We use state of the art design and analysis tools as well as cutting edge programs to model these.
Process Head
At PDC Machines we machine process heads from a variety of materials for process gas compatibility. 300 series stainless steel is the standard used for most applications.
Triple Diaphragm Construction
The diaphragm set consists of three plates. The upper or process side, the lower or hydraulic side and the middle diaphragm. The middle diaphragm is brass to preclude galling. The upper and lower are typically 301 SST for most applications. However, the upper diaphragm material can be supplied in alternate materials, such as Inconel 718, for process compatibility.
Process Contacting Seals
We offer an extensive variety of static elastomeric O-ring seals for process gas compatibility, options include Buna-N, Viton, and Teflon encapsulated Viton and Kalrez.
Leak Detection System
Included with every PDC Machines diaphragm compressor is a leak detection system. This system detects diaphragm or seal failures. Our leak detection system monitors the gas and hydraulic sides of the compressor and will alarm and or shutdown the compressor when an anomaly is detected. Proper maintenance, operation and clean/dry process gas promotes component operating life.
Process Inlet and Outlet Check Valves
Compressor process check valve design is dependent on operating conditions and the process gas itself. PDC compressors typically utilize cartridge or plate style check valves. Valves and valve pockets are designed for easy removal and maintenance.
Automatic Unloading System
The compressor is automatically hydraulically re-primed at start-up and unloaded upon shutdown. This process is an important procedure which will not only provide for maximum efficiency but also eliminates the need for an operator to start-up/re-prime the compressor.
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.
Safety Interlocks
Features include shutdowns for low suction pressure, high discharge pressure, low oil pressure, low water coolant and diaphragm or O-ring failure. Audible and visual annunciators can be supplied for an added level of protection. The compressor can be completely instrumented for automatic operation.
Photo Gallery
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