HELIUM CALIBRATED LEAK STANDARDS

CLP Leak Detector Calibrators

The CLP Model HIGH PRECISION CALIBRATORS FORHELIUM LEAK DETECTORS and U.H.V. SYSTEMSThe CLP Helium Calibrated Leaks are high-precision Standards foruse in critical calibrations of leak detectors and systems, in UltraHigh Vacuum systems, and as Transfer Standards for calibratingother Helium Leaks.
They feature all-welded stainless steel
construction, a premium all-metal shut-off valve, a glass-permeation
leak element, and are bakeable for UHV applications. The CLP Leaks
are part of a family of Helium Calibrators including the GPP, GPPT,-12and GPC Models offered by VTI that cover leak rates from 10 up to-3
10 atm-cc/sec and larger, as detailed other brochures. The CLP
Model is available with leak rates of 10-6 to10-12 and is the only model-10-12
made for the very low rates of 10 to 10 atm-cc/sec. VTI’s experts
are always eager to help you select the best model – technically andcost – for your application. Without obligation, of course.
The CLP Accu-FlowTM Calibrated Leaks are based on the principlethat helium flows through certain materials at a measurable ratedepending on the material thickness, driving pressure andtemperature, and use Quartz or Pyrex as the permeation material forthe leak element. These leaks are available with or without the leak shut-off valve and are made with many types ofRR
attachment fittings such as QF (NW,KF), Conflat , VCR , and others.
All CLP Leaks are provided with Certifications of the NIST-traceable calibrations performed in our A2LA-accredited
Calibration Laboratory.

Choosing the CLP Precision Calibrator
WILL NOT CLOG: permeation leak element.
LONG TERM STABILITY: low depletion rate.
WIDE LEAK-RATE CHOICE: 10-6 – 10-12 range.
BAKEABLE FOR UHV USE: all metal valve.
NEVER NEEDS REFILL: lasts for years.
SIMPLE TO OPERATE: minimal user training.
MEETS ISO REQUIREMENTS: NIST-traceable, A2LAaccredited Calibration Certification.

VTI’s Calibration
Laboratory is Accreditedby the American
Association forLaboratory Accreditation.
As the major manufacturer of Calibrated Leaks for allgases, 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.

CLP Calibrator
Model CLP-X-HE-4FVCR-150DOT(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 STANDARDS

CLP Leak Detector Calibrators
ORDERING INFORMATIONThe CLP Precision Calibrators can be ordered for a specified Helium Leak Rate within a wide range ofvalues. When ordering or requesting a quotation, please provide the Part Number, confirm the Fitting
needed, and state the specific Leak Rate requested including your preferred leak-rate units. Also, specify
the Manufacturing Variance (“Tolerance”) that you can allow on that Leak Rate. The usual manufacturing
variance is +/- 40% of the requested rate. An example specification is 2.0x10-8 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-UP

EXAMPLE FITTINGS AVAILABLE

The CLP Part Numbers are constructed as follows:

CLP-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.
The addition of a Fill Valve is required for leaks in the mid
and high 10-6 range and for all 10-11 and 10-12 leak rates. In
these cases, -MFV is added to the part number for thepremium all-metal fill valve. For the large 10-6 leaks, aTeflon-packed metal fill valve can be used for some non-UHV
applications, and –WFV is added to the part number.

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 CLP(Specify a value in the range)Code forLeak Rate
Range (X)

Code for
Fitting(YYY)

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

Example Part
Number

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
1.0 to 9.9x10-10 atm-cc/sec
1.0 to 9.9x10-11 atm-cc/sec
1.0 to 9.9x10-12 atm-cc/sec

66
7
8
910
1112

KF40
1/2T
KF16
2CFF
MCFF
4MVCR
2CFF
MCFF

1000
1000
1101101101101101101000DOT
1000DOT(Blank)(Blank)(Blank)(Blank)(Blank)(Blank)CLP-6-HE-KF40-1000DOT-WFV
CLP-6-HE-1/2T-1000DOT
CLP-7-HE-KF16
CLP-8-HE-2CFF
CLP-9-HE-MCFF
CLP-10-HE-4MVCR
CLP-11-HE-2CFF-MFV
CLP-12-HE-MCFF-MVF

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

CLP-DATA-09/2004-Rev1