Super Heated Hot Water Spray Pass Through Autoclave For IV Solutions
 
 
Specification:
 
The chamber is cylindrical, single or double wall, with thick insulation and stainless steel-sheet
outer casing.
The construction materials are class AISI 316 stainless steel. Either one or two rectangular
doors, inscribed in the circular cross-section. These doors may be of two kinds:
Laterally sliding and automatic
Laterally hinged and semiautomatic; the doors engage and disengage their clamping devices
with a diagonal movement automatically produced by a gear motor, but the opening and closing
action relative to the vertical h
In both cases, the silicone gasket slides in a special slot formed by NC milling in the frame of the
chamber and it is activated by compressed air.
The gasket and the slot have specially designed dovetail cross-sections to ensure perfect
operation and tightness without requiring lubrication and vacuum for gasket retraction.
All valves and the entire piping are made of stainless steel.
 
Horizontal sliding door
 
Main Parameters

 
Process control
 
As all the other sterilizers, also the counter pressure autoclaves are equipped with the process
controller, specifically developed for monitoring and controlling sterilization processes. Also for
these sterilizers, in order to ensure top process and safety performance, Medpharm offers its
standard process controller.
Sterilizers are based on an extremely straight forward principle which is implemented with a highly
reliable and mechanically very simple unit. When the program begins, after the load to be sterilized
has been introduced, only the lower part of the chamber is filled with treated water of adequate microbiological quality.
The chamber has a circular cross-section with a single wall, but has rectangular doors. The air
inside the chamber is not removed. The water, which is drawn from the bottom of the chamber
by a sanitary type centrifugal pump, is circulated through a moving-plate heat exchanger, also
of the sanitary type, which is indirectly heated in counter current with mains steam.
The water is then fed back into the upper part of the chamber and is distributed onto the load by
a system of solid-cone spray nozzles. Water redistribution onto the lower layers of the load is
ensured by appropriate shelves. Heating of the circulation water and thus of the load is gradua
l but quite fast. The sterilization temperature of 121 is reached within approximately 25-30
minutes inside 500 ml containers. After the sterilization time has elapsed, the circulation water,
which by then is sterile as well, continues to circulate through the exchanger, which however in
this step is fed with cold cooling water.
Distribution system for the circulation water. Equipped with nozzles producing a "solid" spray
cone, mounted so as to avoid water stagnation in the ducts of the sparger.
Within approximately 10 minutes, the temperature inside the containers gradually drops to
approximately 80° C, which is the ideal temperature to also obtain rapid and spontaneous drying
of the load, when extracted from the autoclave. The entire process therefore lasts approximately
60 minutes. Throughout the process, an adequate counter pressure of sterile air is maintained
inside the chamber in order to counterbalance, in the most appropriate and automatic manner,
the over pressure within the product.