The Model AD3745-ZHE Zero Headspace Extractor is an extractor vessel used for separating solid samples and their volatile extracts during the Toxicity Characteristic Leaching Procedure (TCLP) U.S. EPA Method 1311 and the Synthetic Precipitation Leaching Procedure (SPLP) US EPA Method 1312. The AD3745-ZHE permits the sealed extraction and pressure filtration of volatile pollutants without losses due to evaporation.
Complies with US EPA Specifications
The AD3745-ZHE is a pressure actuated piston device with all wetted surfaces made from Type 316 stainless steel. It uses either a standard 90mm diameter glass fiber filter (0.7 micron) or alternatively, a 90mm diameter stainless steel filter (0.5 micron) for oily and difficult-to-filter waste. The ZHE utilizes standard Viton® or Teflon® O-rings and has a nominal capacity of 550 mL.
Design Features
The new SLO/FLO® internal design of the AD3745-ZHE limits the maximum piston velocity in the unit. By restricting the internal piston speed, you can now perform TCLP or SPLP without concern about filter rupture, sample shock or “shooting the piston”. Assembly of the unit with its symmetrical body, free-floating piston and removable end flanges, is quick and easy. The bottom flange is fitted with a quick-disconnect air fitting, a pressure relief valve and a 0-60 psi pressure gauge. The top flange contains an inlet/outlet valve and “Speed Nut” connector for introduction of the extraction buffer and discharge of the leachate. The filter is sealed and secured between the cylinder body and the top flange. The AD3745-ZHE comes supplied with an agitator collar and an individual set-up chair, it is compatible with all Associated Design Rotary Agitators.
Built for Durability and Convenience
The AD3745-ZHE is a stable instrument built to exceed the 50-psi level needed for phase separation. It can be cooled to 4 degrees C, as is required for storage of volatile waste samples.
No Tools Required
When used in conjunction with the Associated Design Rotary Agitators and Hazardous Waste Filtration Units, no tools are needed to perform the complete TCLP extraction.
Proven and Approved
The Associated Design Zero Headspace Extractor was designed and developed in 1984 and has been used by major laboratories world wide-since 1986 and is an US EPA-approved TCLP device.
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