CALIBRATED LEAK STANDARDS FOR ALL GASES

CL Capillary Leaks with Reservoir

The CL Model CAPILLARY CALIBRATED LEAKS (WithReservoir) FOR ALL GASES
VTI’s CL Model Calibrated Gas Leaks have astainless steel capillary that has been precisioncrimped to provide an accurate flow-rate restriction
for any gas. The gas, under pressure in thereservoir, flows through the capillary restriction andinto the system to which it is attached using one of
the many fittings available. This yields a precise,known flow rate.
The CL models have an all-welded construction anduse an all-metal shut-off valve making themunbreakable and bakeable for UHV applications.
They also have a low temperature coefficient,approximately 0.2 % per degree C and are available
in a wide range of leak rates. Caution should betaken when considering capillary leaks for flow
rates smaller than 10-6 atm-cc/sec, however, due topotential plugging of the leak. VTI takes care in theproper construction and processing during
manufacture to insure a clean and stable flow ofhigh-purity gas or gas mixtures.

Choosing the CL Calibrator
CAN BE PROVIDED WITH ANY GAS: or mix.
UNBREAKABLE: all stainless steel, all welded.
WIDE LEAK-RATE CHOICE: typically 10-7 to 10-3 atmcc/sec.
STABLE: low temperature coefficient of 0.2% per oC.
BAKEABLE FOR UHV USE: using all metal fittings.
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 all gases, allleak rates, and all makes of leak detectors, VTI supplies themworldwide to users, distributors, and other manufacturers. TheseAccu-Flow™ Leak Standards are recognized internationally for
their superior quality construction and calibration.

Typical CL assembly
CL-X-BB-4FVCR-1000DOT-WFV.

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

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

CALIBRATED LEAK STANDARDS FOR ALL GASES

CL Capillary Leaks with Reservoir
ORDERING INFORMATION
For an order or quotation for a CL Leak, please provide the Part Number and confirm the Outlet Fitting forconnection to your system or part. It is also necessary to specify the Gas and specific Leak Rate with yourpreferred leak-rate units. In addition, the Manufacturing Variance (“Tolerance”) that you can allow on thatLeak Rate should be specified as +/- 40% (the normal allowance), or as +/- 15% (the “Special-RangeVariance”), for which there is an additional cost and an “-SR” added to the part number. An example
specification is 2.0x10-5 atm-cc/sec +/- 40%. In all cases, the leak rate provided will be as close as we canmake it to your specified rate, and the actual rate, as calibrated, will be recorded on the Calibration Tag andthe Certifications.

EXAMPLE GASES AVAILABLE

PART NUMBER BUILD-UP

Please contact us with other gas requirements.
Helium (HE), Argon (AR), Nitrogen (N2), Hydrogen (H2),
Carbon Dioxide (CO2), Oxygen (O2), Air (AIR), Methane(CH4), Sulphur Hexafluoride (SF6), Refrigerants (“R”#),
Xenon (XE), Deuterium (D2), Mixed gases (MIX).

The CL Part Numbers are constructed as follows:

CL-X-BB-YYYY-ZZZZ-FVO
where X = the code for the Leak Rate Range required,
where BB = the code for the Gas to be used,
where YYYY = the code for the fitting required *,where ZZZZ = the code for the Reservoir required,and FVO = Fill Valve Option: WFV or MFV (Bakeable).

EXAMPLE FITTINGS AVAILABLE
Please contact us for other fitting requirements.

A fill valve is required for many gases other than Helium,Argon, Nitrogen, Carbon Dioxide, and Air. Due to the highgas depletion rates for leak rates of 10-4 and 10-3 atm-cc/sec,these leaks must also have a fill valve for all gases.
Additionally, leaks in the 10-3 range, and often in the 10-4range, have an integral pressure gauge installed to monitor
the residual pressure and indicate when filling is necessary.

Code:4FVCR
4MVCR
MCFF
2CFF
1/4T
KF16
KF25
KF40
4MPT

* Except for Helium leaks, the fitting for 10-7 atm-cc/sec andsmaller leaks must be a VCR or Conflat flange. If you
require a different fitting, an adapter can be purchased.

Description:¼” Female VCR¼” Male VCR
1.33” OD Mini Conflat Flange
2.75” OD Conflat Flange¼” OD Tube¾” OD ISO Flange
1” OD ISO Flange
1.5” OD ISO Flange¼” Male Normal Pipe Thread

LEAK RATE RANGES AVAILABLE and EXAMPLE PART NUMBERS
Leak Rate Ranges
Available for the CLLeak
Gas
Range CodeCode(X)(BB)

OutletFittingCode(YYYY)Res’Size(cc)

Res’
Code

Fill
Example Part
Valve
Number(ZZZZ)

1.0 to 9.9x10-3 atm-cc/sec

3

AR

2CFF

1000

1000DOTYes

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

4567N2HE
H2XE

KF25
1000
4MVCR 500
MCFF300
2CFF
215

1000DOT
500DOT
300DOT
215CC

Yes
NoYes
Yes

CL-3-AR-2CFF-1000DOT-MFV-1500PSI
CL-4-N2-KF25-1000DOT-MFV
CL-5-HE-4MVCR-500DOT
CL-6-H2-MCFF-300DOT-MFV
CL-7-XE-2CFF-215CC-MFV

Note: Larger and smaller flow rates are possible. However, with leaks smaller than 10-6 atm-cc/sec there isincreased risk of plugging of the capillary and precaution in use should be taken. For all leak rates, the leak’s shutoff valve should be kept in the closed position when the leak is not in active use.
A fill valve is required for H2, CO, CH4, SO2, NE, KR, D2, XE and HE3. Mixed gas leaks may also need additional
calibration points.

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

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

CL-DATA-09/2004-Rev1