Ordering Information
For an order or quotation request for a PSO Leak, please provide the Part Number constructed from the codes provided, and also confirm the Fittings by name and function to avoid errors. In addition, please describe the Gas or Gas Mix to be used. Any dimensional requirements should also be noted.
For the PSO Leaks with a Reservoir, please also specify the specific Leak Rate requested and your preferred leak-rate units. For PSO Leaks without a reservoir to be used at one leak rate and pressure, please provide the specific Leak Rate requested, plus the Inlet Pressure that you will use from your gas line (corresponding to that Leak Rate). In either case, the Outlet Pressure should be stated as "Flow into Vacuum" (the usual) or "Flow into Atmosphere" (1 atm.). Also, the Manufacturing Variance ("Tolerance") that you can allow on that Leak Rate should be specified as +/- 40% (the normal allowance), or as +/- 15% (the "Special-Range Variance"), 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 both cases, the leak rate provided will be as close as we can make it to your specified rate, and the actual rate, as calibrated, will be recorded on the Calibration Tag and the Certifications.
PSO Leaks without a reservoir can also be calibrated at multiple inlet pressures to provide a range of adjustable leak rates, for example covering values from 1 to 9x10-5 atm-cc/sec using three pressures from 15 to 200 psig. VTI provides a curve of Leak Rate vs. Pressure based on the calibrations. This allows the leak rate to be changed by changing your pressure and allows exact leak rates to be selected without the limitation of the manufacturing variance. For these adjustable-rate PSO Leaks, VTI can advise on the leak-rate range achievable based on your available pressure range.
Example Fittings Available
Please contact us for other fitting requirements.
| Code: | Description: |
|---|---|
| 4FVCR | ¼" Female VCR |
| 4MVCR | ¼" Male VCR |
| MCFF | 1.33" OD Mini Conflat Flange |
| 2CFF | 2.75" OD Conflat Flange |
| KF16 | ¾" OD ISO Flange |
| KF25 | 1" OD ISO Flange |
| 4MPT | ¼" Male Normal Pipe Thread |
Other Ordering Codes
| X Code: | Leak Rate Range: |
|---|---|
| 2 | 1.0 to 9.9x10-2 atm-cc/sec |
| 3 | 1.0 to 9.9x10-3 atm-cc/sec |
| 4 | 1.0 to 9.9x10-4 atm-cc/sec |
| 5 | 1.0 to 9.9x10-5 atm-cc/sec |
| 6 | 1.0 to 9.9x10-6 atm-cc/sec |
| R Code: | Reservoir Size: |
| 150DOT | 150cc tested per DOT |
| 300DOT | 300cc tested per DOT |
| 1000DOT | 1000cc tested per DOT |
Part Number Build-Up
The PSO Series Part Numbers are constructed as follows:
For leaks without a resevoir:
PSOT-X-NA-BB-YYYY-ZZZZ-OOOO
For leaks with a resevoir:
PSOT-X-NA-BB-YYYY-ZZZZ-RRRR-FVO
where T = operation (M=Man, A=Air, S=Solenoid),
where X = the code for the Leak Rate Range,
where N = number of calibration points,
where A = cal method - (C for He P for other gases)
,where BB = Gas to be used,
where YYYY = the INLET fitting required,
where ZZZZ = the OUTLET fitting required,
where OOOO = the OPTIONAL port fitting,
where RRRR = the Reservoir required,
and FVO = the Fill Valve Option - WFV, MFV.
Example Gases Available
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).
Example Part Numbers
|
PSO-valve Leak with a Reservoir Part Number: PSOM-6-AR-4FVCR-4MVCR-300DOT-MFV An Argon leak with manual valve operation, one specified leak rate in the range of 10-6 atm-cc/sec, VCR fittings, 300cc reservoir and an all-metal fill valve. |
PSO-valve Leak without a Reservoir Part Number: PSOA-5-3C-HE-4FVCR-4MVCR-4FVCR A Helium leak with an air-operated valve, calibrations at 3 rates/pressures in the range of 10-5 atm-cc/sec and VCR fittings. |
