Features
These GPPT Model Helium Calibrated Leak Standards have TeflonŽ-permeation type leak elements and are widely used to tune and calibrate helium mass spectrometer leak detectors and leak testing systems. They are part of a family of Calibrators including the GPP, GPC and CLP Models offered by VTI that cover leak rates from 10-12 up to 10-3 atm-cc/sec and larger. Those models are detailed in other brochures, and VTI's experts are always eager to help you select the best model - technically and cost - for your application. Without obligation, of course.
The GPPT Accu-Flow™ Calibrated Leaks use a Teflon® membrane as the flow rate control element. The Helium reservoir is under pressure, and the gas permeates through the Teflon® from the pressure side to the exhaust side of the element. This yields a precise, constant flow rate which is then used for calibrating helium leak detectors and other applications.
The GPPT Leaks feature an all-welded stainless steel construction for reliability. Most leaks require a shut-off "isolation" valve to zero the leak signal during tuning and calibration. VTI offers the GPPT Leaks both with and without a Teflon®-packed stainless steel shut-off valve. The inlet port of the brand of leak detector or vacuum system determines the termination of the leak. All leaks are available with QF (NW, KF), Normal Pipe Thread, VCR® and many other types of fittings.
All GPPT Leaks are provided with certifications of the NIST-traceable calibrations performed in our A2LA-accredited Calibration Laboratory.
Why choose the GPPT Calibrator ?
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