HELIUM CALIBRATED LEAK STANDARDSGPP Leak Detector Calibrators

The GPP Model CALIBRATORS FOR HELIUM LEAK
DETECTORS
These GPP Model Helium Calibrated Leak Standards haveglass-permeation type leak elements and are the mostcommon ones used to tune and calibrate helium mass
spectrometer leak detectors, leak testing systems andvacuum systems. They are part of a family of Calibrators
including the GPPT, GPC and CLP Models offered by VTI thatcover leak rates from 10-12 up to 10-3 atm-cc/sec and larger.
Those models are detailed in other brochures, and VTI’sexperts are always eager to help you select the best model –technically and cost – for your application.
Withoutobligation, of course.
The GPP Accu-FlowTM Calibrated Leaks are based on theprinciple that helium flows through certain materials at ameasurable rate depending on the material thickness, driving pressure and temperature. Depending on the leakrate required in the GPP Leaks, the permeation material is Pyrex or Quartz.
The GPP 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 GPP Leaks both with andwithout 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. The most common termination of the GPP Leaks is a 1-1/8”
diameter tube which mates directly to many Varian, Veeco and VIC leak detectors. All leaks are available withQF (NW, KF) and many other types of fittings.
All GPP Leaks are provided with certifications of the NIST-traceable calibrations performed in our A2LAaccredited Calibration Laboratory.

Choosing the GPP Calibrator
WILL NOT CLOG: permeation leak element.
LONG TERM STABILITY: Low depletion rate.
WIDE LEAK-RATE CHOICE: 10-5 – 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.

GPP Calibrator
Model GPP-X-HE-KF25-300DOT-WFV(X= Leak Rate Range)

As the major manufacturer of Calibrated Leaks for
all gases, all leak rates, and all makes of leakdetectors, VTI supplies them worldwide to users,
distributors, and other manufacturers. These AccuFlow™ Leak Standards are recognizedinternationally for their superior quality construction
and calibration.

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 STANDARDSGPP Leak Detector Calibrators
ORDERING INFORMATIONThe GPP 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 to3x10-x, 4 to 6x10-x, or 7 to 9x10-xin 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 GPP Part Numbers are constructed as follows:

GPP-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 VCR
MCFF
1.33” OD Mini Conflat Flange
2CFF2.75” OD Conflat Flange½T½” OD Tube
KF16¾” OD ISO Flange
KF25
1” OD ISO Flange
KF401.5” 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 GPP(Specify a value in the range)

Code forLeak Rate
Range (X)

Code forFitting(YYY)

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

Example Part
Number

1.0 to 9.9x10-5 atm-cc/sec
1.0 to 9.9x10-6 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
1.0 to 9.9x10-9 atm-cc/sec

56667
8
9

KF25
KF40
118T
1/2T
KF16
2CFF
MCFF

1000
500
500
300
110110110

1000DOT
500DOT
300DOT
300DOT(Blank)(Blank)(Blank)GPP-5-HE-KF25-1000DOT-WFVGPP-6-HE-KF40-500DOT-WFVGPP-6-HE-118T-300DOT-WFVGPP-6-HE-1/2T-300DOT
GPP-7-HE-KF16
GPP-8-HE-2CFF
GPP-9-HE-MCFF

Other leak-rate units, such as Torr-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

GPP-DATA-09/2004-Rev1