HELIUM CALIBRATED LEAK STANDARDSGPPT Leak Detector Calibrators

The GPPT Model CALIBRATORS FOR HELIUM LEAK
DETECTORS
These GPPT Model Helium Calibrated Leak Standards have Teflon®permeation type leak elements and are widely used to tune andcalibrate 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 otherbrochures, and VTI’s experts are always eager to help you select thebest model – technically and cost – for your application. Withoutobligation, of course.
The GPPT Accu-FlowTM Calibrated Leaks use a Teflon® membraneas the flow rate control element. The Helium reservoir is underpressure, and the gas permeates through the Teflon® from thepressure side to the exhaust side of the element. This yields aprecise, 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 thetermination of the leak. All leaks are available with QF (NW, KF), Normal Pipe Thread, VCR® and many other types offittings.
All GPPT Leaks are provided with certifications of the NIST-traceable calibrations performed in our A2LA-accredited
Calibration Laboratory.

Choosing the GPPT Calibrator
WILL NOT CLOG: permeation leak element.
VIRTUALLY UNBREAKABLE: minimizes repairs.
LONG TERM STABILITY: Low depletion rate.
WIDE LEAK-RATE CHOICE: 10-4 – 10-9 range.
NEVER NEEDS REFILL: lasts for years.
SIMPLE TO OPERATE: minimal user training.
MEETS ISO REQUIREMENTS: NIST-traceable,
A2LA-accredited Calibration Certification.

VTI’s Calibration
Laboratory is Accreditedby the American
Association forLaboratory Accreditation.
As the major manufacturer of Calibrated Leaks for all gases,
all leak rates, and all makes of leak detectors, VTI supplies
them worldwide to users, distributors, and othermanufacturers.
These Accu-Flow™ Leak Standards arerecognized internationally for their superior quality
construction and calibration.

GPPT Calibrator
Model GPPT-X-HE-QF40-300DOT-WFV(X= Leak Rate Range)

VACUUM TECHNOLOGY INCORPORATED Oak Ridge, Tennessee USA
Toll-Free: 800-704-4774

Fax: 865-481-3788
sales@vacuumtechnology.com
www.vacuumtechnology.com

HELIUM CALIBRATED LEAK STANDARDSGPPT Leak Detector Calibrators
ORDERING INFORMATIONThe GPPT Calibrators can be ordered for a specified Helium Leak Rate within a wide range of values. Whenordering or requesting a quotation, please provide the Part Number, confirm the Fitting needed, and state thespecific Leak Rate requested including your preferred leak-rate units.
Also, please specify theManufacturing Variance (“Tolerance”) that you can allow on that Leak Rate. The usual manufacturing
variance is +/- 40% of the requested rate. An example specification is 2.0 x 10-8 atm-cc/sec +/- 40%.
Alternatively, the allowable values as manufactured can be specified as 1 to 3x10-x, 4 to 6x10-x, or 7 to 9x10-x
in a Leak Rate Range listed below.
Also, a “Special Range” manufacturing variance is available of +/- 15% of the requested rate. For thisspecial variance, an “-SR” is added to the end of the Part Number and there is an additional cost. In allcases, the leak rate provided will be within the selected manufacturing variance and will be as close as we
can make it to your specified rate. The actual rate, as calibrated, will be recorded on the Calibration Tag andthe Certifications.

PART NUMBER BUILD-UPEXAMPLE FITTINGS AVAILABLE

The GPPT Part Numbers are constructed as follows:

GPPT-X-HE-YYYY-ZZZ
where X = the code for the Leak Rate Range required,
where YYYY = the code for the fitting required,and ZZZ = the code for the reservoir size,
all as listed in the tables.
Valve Requirements – the addition of a Fill Valve isrequired on all leaks in the mid 10-6 range and larger
due to the higher fill pressures. In these cases, -WFV
is added to the end of the part number. For leaks
without a shut-off valve, -NV is added.

Please contact us for other fitting requirements.
Code:
Description:
118T
1-1/8” OD Port Tube
4FVCR¼” Female VCR
4MVCR¼” Male VCRMCFF
1.33” OD Mini Conflat Flange
2CFF2.75” OD Conflat Flange½T½” OD Tube
QF16¾” OD ISO Flange
QF251” OD ISO Flange
QF401.5” OD ISO Flange
118T/34T
1-1/8” OD Tube with step to ¾” Tube
4MPT¼” Male Normal Pipe Thread

LEAK RATE RANGES AVAILABLE and EXAMPLE PART NUMBERS
Leak Rate Ranges
Available for the GPPT(Specify a value in the range)

Code forLeak RateRange (X)Code forFitting(YYY)

Suggested
Reservoir
Size (cc)Code forReservoir
Size (ZZZ)

Example Part
Number

1.0 to 9.9x10-4 atm-cc/sec
1.0 to 9.9x10-5 atm-cc/sec
1.0 to 9.9x10-5 atm-cc/sec
1.0 to 9.9x10-6 atm-cc/sec
1.0 to 3.0x10-6 atm-cc/sec
1.0 to 9.9x10-7 atm-cc/sec
1.0 to 9.9x10-8 atm-cc/sec

4556678

MCFF
QF25
QF40
118T
1/2T
QF162CFF

1000
1000
500
300
300
110
110

1000DOT
1000DOT
500DOT
300DOT
300DOT(Blank)(Blank)GPPT-4-HE-MCFF-1000DOT-WFVGPPT-5-HE-QF25-1000DOT-WFVGPPT-5-HE-QF40-500DOT-WFVGPPT-6-HE-118T-300DOT-WFVGPPT-6-HE-1/2T-300DOT
GPPT-7-HE-QF16
GPPT-8-HE-2CFF

Other leak-rate units, such as mbar-liters/sec, can be specified and calibration data will be reported in the units
requested. Please contact us if you have any questions or want a customized design or manufacturing variance.
“Special “Orders are everyday products for us ! Just let us know what you need !!

VACUUM TECHNOLOGY INCORPORATED Oak Ridge, Tennessee USA
Toll-Free: 800-704-4774

Fax: 865-481-3788
sales@vacuumtechnology.com
www.vacuumtechnology.com

GPPT-DATA-09/2004-Rev1