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Johnson Matthey Gas Purification Technology (GPT) Purifier Support

Johnson Matthey (JM) GPT announced the closure of their gas purification business in March 2013. Effective August 7, 2013, SAES Pure Gas has acquired the assets related to JM GPT's gas purification equipment business. Johnson Matthey GPT purifiers are not availalbe, and no longer manufactured. If you have any questions please contact us.

HP Series with V-Purge Hydrogen Purifiers for 1 - 220 slpmJohnson Matthey HP-100

The Johnson Matthey HP Series hydrogen purifier includes the palladium cell (Pd cell), temperature controller, bleed gas flowmeter and manual outlet valve.
SAES Pure Gas provides repair of all HP Series purifiers still covered under warranty. Out-of-warranty purifiers can be returned for scrap credit toward the purchase of a new purifier. SAES can provide an equivalent purifier as a complete replacement. Refer to the chart below for a list of suggested purifiers.

Johnson Matthey GPT to SAES Cross Reference Table

Johnson Matthey HP Series Palladium Purifier Equivalent SAES Pure Gas Palladium Purifier
Model Number Max Flow1 (slpm) Model Number Max Flow2 (slpm)
HP-2-VCR 1 PS7-PD05-08 7.5
HP-10-VCR 5 PS7-PD05-08 7.5
HP-25-VCR 12 PS7-PD05-21 16.6
HP-50-VCR 24 PS7-PD05-50 40.6
HP-100-VCR 47 PS7-PD1-05 60
HP-150-VCR 71 PS7-PD1-06 70
HP-200-VPurge 94 PS7-PD1-08 95
HP-230-VPurge 105 PS7-PD1-10 120
HP-400-VPurge 188 PS7-PD1-15 185
HP-480-VPurge 220 PS7-PD1-20 240

1200 psig inlet pressure and 0 psig outlet pressure
2200 psig inlet pressure and 20 psig outlet pressure

HP Series Palladium Cells in MOCVD Reactors

Johnson Matthey palladium alloy diffusion cells are installed in MOCVD tools. These Pd cells include heaters and thermocouples, and the control system is mounted separately.

Frequently Asked Questions Regarding Support for Johnson Matthey Gas Purification Technology (GPT) Gas Purifiers

HP Series and HP Series V-Purge Palladium Hydrogen Purifiers

Can I return my palladium cell for repair?
Palladium cells still under the Johnson Matthey warranty can be returned for repair. Older Pd cells, outside of warranty, may be returned for scrap credit against the purchase of new purifiers. If a repair is not possible, we can quote a SAES palladium purifier with the same flow and purity performance.

Can I purchase a new Johnson Matthey palladium cell?
SAES can offer our own palladium hydrogen purifiers, the Johnson Matthey design is no longer manufactured.

Can I return my old Pd cell for palladium scrap credit?
Yes, the cell can be returned for credit against the purchase of new purifiers.

Bulk Gas Purifiers – PSH, GPT, and HTG Series

Do you supply the replacement palladium probe assemblies?
Yes, we are stocking this critical spare probe assemblies for non-warranty replacement.

How do I purchase parts if my purifier is out-of-warranty?
You can contact us to inquire on spare part availability. Most parts are not available any longer (except the probes, which are available).

Who do I contact for preventative maintenance or other service on my palladium purifier?
Maintenance and on-site service is very limited. Please contact us for more information.

PureGuard Catalytic and Heated Getter Purifiers - IG-XL Series and Wall Mount Heated Getter Gas Purifiers

Can I send my IG-XL Series purifier to SAES for regeneration?
We are offering an exchange program to replace purifiers such as the IG-35XL, IG-500XL and IG-2500XL PureGuard factory regenerable purifiers with our equivalent model. Please contact our service department or your local distributor for information on the return process.

How do I purchase a new IG-XL Series purifier?
The IG-XL Series purifiers are no longer available, but SAES offers equivalent purifiers, many with the same dimensions for drop-in replacement.

Can I purchase PureGuard Wall Mount purifiers and replacement columns?
The JM GPT Wall Mount getter purifiers and replacement getter cartridges are no longer available. SAES can offer comparable heated getter models, which do not drop into the same piping locations. The SAES Pure Gas version will have very similar flow rate performance and identical impurity removal performance.

Regeneration Services

Many of our MicroTorr ambient temperature purifiers are regenerable. Regenerable means that the impurities inside the purifier are removed. Once a regeneration is performed on the purifier it has an identical lifetime as if it was a new purifier. The Regeneration process takes approximately 4 weeks from the day the purifier is received at the factory.

The Regeneration Process

Step 1: Is your purifier regenerable? Please consult the chart below to see if your purifier is regenerable. The media refers to the three digit number located in the part number of the purifier. For example the purifier MC1-902F contains 902 media which is regenerable.


example: MC3000-XXXF

Is it Regenerable (Yes/No)

Is it Dangerous Goods (Yes/No)



























Yes [UN2881, Class 4.2]



Yes [UN3089, Class 4.1]



Yes [UN3089, Class 4.1]



Yes [UN3089, Class 4.1]



Yes [UN2881, Class 4.2]



Yes [UN2881, Class 4.2]



Yes [UN2881, Class 4.2]



Yes [UN2881, Class 4.2]



Yes [UN2881, Class 4.2]




Step 2: Is your purifier classified as Dangerous Goods? Understanding if your purifier is Dangerous Goods (DG) is important because DG items must be shipped by someone certified to ship DG. This person will have attended classes on DG and has the relevant certification.

If the purifier is DG, please also provide the following information along with your request for an RMA#:

  • Copy of Shipper’s Declaration of Dangerous Goods (REQUIRED for ALL Air and Ocean Shipments)
  • Copy of DG Training Certificate for person signing Shipper’s Declaration of Dangerous Goods.
  • Copy of Declaration of Contamination Form

Step 3: Fill out the RMA paperwork - All product returned to SAES Pure Gas requires a Return Material Authorization (RMA). All regenerations are processed through the customer service department at SAES Pure Gas. Please fill out the information located on this page of our website (click here). Please provide the information on that webpage and download the Declaration of Contamination form. Please contact our Customer Service Department if you have any questions:

SAES Pure Gas Field Service Engineers

Glossary of Terms

Surrounding environment. As used in gas purification: at room temperature no heat required.

An instrument used to detect impurities

Bulk Capacity
The amount of impurities that can be retained by a given purification media, such as getter

The passing of impurities through a purifier.

A reactive component which aids in the conversion of oxygen and other compounds into a desired compound. Used as within some gas purifiers to convert CH4 into CO2 and H2O.

The chemical condensation of a gaseous component (ie: a gas impurity) into the bulk of a solid media (ie: getter) such that the compound chemically combines with the media to form a new compound, thus both materials have been chemically changed and the initial compound is irreversibly trapped within the bulk of the solid media.

A reactive metal alloy. Getter will react differently in a given environment depending on the composition of the alloy (ie: how much zirconium, vanadium, titanium, etc. is in the mix). The getter alloy can be fine tuned to react a certain way by adjusting the type and amount of "ingredients" also the size and shape. The getter alloy in processed form is a powder. It can then be formed in different ways for different applications. It can be coated onto a surface or, as used in gas purification, compressed into a pellet about the size of a Tic-tac. For gas purification, the getter pellets are typically placed inside of vessels. These vessels are cylindrical in shape and range in size from 0.5" diameter and a few inches long to as large as 3.0' diameter and over 6.0' tall.

Getter Cartridge
See Getter Column

Getter Column
A vessel, filled with getter, for the purpose of gas purification, or may also be referred to as getter cartridges. Depending on the application, a getter column may be heated or not. Either way, the gas to be purified is flowed through the getter column, the getter reacts with the impurities present in the host gas, and thus impurities are irreversibly removed by the getter.

Getter Stabilized Zeolite (GSZ)
A purification media developed by SAES for ambient purification. Extremely high capacity for H2O and O2 removal.

The length of expected service of a gas purifier, getter cartridge (column), or adsorber before either replacement or regeneration is required.

Normal Cubic Meters Per Hour. Unit of measure common to larger gas purifiers

The physical condensation of a gas on the surface of a solid. This process can be reversed by introducing heat.

An instrument which removes unwanted impurities.

Parts per billion. 1 ppb = 1 in 1,000,000,000. Typical means of measuring gas purity

Parts per trillion. 1 ppt = 1 in 1,000,000,000,000

Point-Of-Use (POU)
The physical location within a process tool where gases are utilized.

Standard Cubic Centemeters: Unit of measure common to very small gas purifiers

Standard Cubic Feet Per Hour: Unit of measurement, common in U.S.

Standard Liters Per Minute: Unit of measure common to point-of-use gas purifiers

Rare Gas
These are often called Noble or Inert Gases. Found on the right hand column of the Periodic Table of the Elements, the Rare Gases include Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn). A SAES Purifier designated for Rare Gas will purify any of the above Rare Gases.

That which can be renewed or refreshed without replacing critical components

Flowrate Conversions

Assumes 20º C and 14.72 psia
3000 104695 1745 46583 46582500
2000 69797 1163 31055 31055000
1500 52348 872 23291 23291250
1000 34898 582 15528 15527500
900 31409 523 13975 13974750
800 27919 465 12422 12422000
700 24429 407 10869 10869250
600 20939 349 9317 9316500
500 17449 291 7764 7763750
400 13959 233 6211 6211000
300 10470 174 4658 4658250
200 6980 116 3106 3105500
100 3490 58.2 1553 1552750
90.0 3141 52.3 1397 1397475
80.0 2792 46.5 1242 1242200
70.0 2443 40.7 1087 1086925
60.0 2094 34.9 932 931650
50.0 1745 29.1 776 776375
40.0 1396 23.3 621 621100
30.0 1047 17.4 466 465825
20.0 698 11.6 311 310550
15.0 523 8.72 233 232913
10.0 349 5.82 155 155275
8.00 279 4.65 124 124220
7.00 244 4.07 109 108693
6.00 209 3.49 93.2 93165
5.00 174 2.91 77.6 77638
4.00 140 2.33 62.1 62110
3.00 105 1.74 46.6 46583
2.00 69.8 1.16 31.1 31055
1.00 34.9 0.582 15.5 15528
0.900 31.4 0.523 14.0 13975
0.800 27.9 0.465 12.4 12422
0.700 24.4 0.407 10.9 10869
0.600 20.9 0.349 9.32 9317
0.500 17.4 0.291 7.76 7764
0.400 14.0 0.233 6.21 6211
0.300 10.5 0.174 4.66 4658
0.200 6.98 0.116 3.11 3106
0.100 3.49 0.058 1.55 1553
0.0750 2.62 0.0436 1.16 1165
0.0500 1.74 0.0291 0.776 776
0.0250 0.872 0.0145 0.388 388
0.0150 0.523 0.00872 0.233 233
0.0100 0.349 0.00582 0.155 155
0.00500 0.174 0.00291 0.0776 78
0.00250 0.0872 0.00145 0.0388 39

Regeneration Services

About Flow Rate Conversions
Design calculations have been made using the following unit convention factors to maintain design consistency

Normal flow, Normal Cubic Meters per Hour, (Nm3/hr)
Normal Conditions are defined as: Tn = 20.0 ºC, (68 ºF) Pn = 1.01 bara, (14.72 psia)
Note: the definition of Normal conditions are consistent with the calibration of the CME.

Standard flow, Standard Cubic Feet per Minute, (SCFM)
Standard Conditions for the calculation of SCFM are defined as: Ts= 15.6 ºC, (61 ºF) Ps= 1.01 bara, (14.72 psia) Note: the definition of Standard conditions are consistent with the calibration of the CME.

Standard flow, Standard Liters per Minute, (SLPM)
Standard Conditions for the calculation of SLPM are defined as: Tn= 0 ºC, (32 ºF) Pn= 1.01 bara, (14.72 psia) Note: the definition of SLPM conditions are consistent with the calibration of the CME.

Standard flow, Standard Cubic Centimeters per Minute, (SCCM) Standard Conditions for the calculation of SCCM are defined as: Tn= 0 ºC, (32 ºF) Pn= 1.01 bara, (14.72 psia) Note: the definition of SCCM conditions are consistent with the calibration of the CME.

Conversion basis and Flow Concerversion Table shows the calculation basis for the flow rate conversions as used by SAES Pure Gas.

Note: Ratios toward the right side of the Figure are acutal conversion used in the Crane Companion

Flow calculations using SPG definitions:

Standard flow, SCFM

Ts = 61 deg F pV = mRT
Ps = 14.696 PSIA m = 0.07374 lbm per SCF
R = 55.12 (ft lbf)/(lbm deg R) 0.22603 SCFM per lbm
M = 28.0134 mol/mol 6.33176 SCFM per (lb mol)/hr
Gas = Nitrogen

Nm3/SCFM = 1.71928
SCFM/Nm3/hr = 0.58164

Normal flow, Nm3/hr

Tn = 20 deg C
Pn = 14.72 PSIA pV = mRT
Pn = 101490.8 Pa m = 1.16726 lbm per Nm3
R = 296.6 J/(kg deg K) 0.3886 Nm3/hr per lbm
M = 28.0134 10.88605 Nm3 per (lb mol)/hr
Gas = Nitrogen

Nm3/SLPM = 0.0644
SLPM/Nm3/hr = 15.5275

Standard flow, SLPM

Ts = 32 deg F pV = mRT
Ps = 14.72 PSIA m = 0.00276 lbm per SL
R = 55.12 (ft lbf)/(lbm deg R) 6.03401 SLPM per lbm
M = 28.0134 mol/mol 169.0333 SLPM per (lb mol)/hr
Gas = Nitrogen