Gow-Mac 75-810-HE User manual

Operating Manual
Model 75-810 & 75-810-AR
Noble Gas Purier
75-810-HE: 120 V, 50/60 Hz
75-812-HE: 230 V, 50/60 Hz
75-810-AR: 120 V, 50/60 Hz
75-812-AR: 230 V, 50/60 Hz
November 2020
Rev. 0
READ INSTRUCTIONS
BEFORE OPERATING
277 Brodhead Rd., Bethlehem, PA 18017-8600 U.S.A. Tel: [phone]

GOW-MAC Instrument Co.
2

Model 75-810 & 75-810-AR Noble Gas Purier
Rev. 0 11/20
3
Contents
Chapter 1 - Introduction......................................................................................................... 9
Chapter 2 - Safety Precautions ............................................................................................11
Chapter 3 - Specications ................................................................................................... 13
Chapter 4 - Installation ........................................................................................................ 15
Chapter 5 - Operation.......................................................................................................... 17
Chapter 6 - Maintenance & Servicing.................................................................................. 19
Chapter 7 - Replacement Parts........................................................................................... 21
Chapter 8 - Appendix........................................................................................................... 23

GOW-MAC Instrument Co.
4
DISCLAIMERS
The information in this document is subject to change without notice. This manual could in-
clude technical inaccuracies or typographical errors. Changes are made periodically to the informa-
tion herein; these changes will be incorporated in subsequent revisions of the manual. GOW-MAC®
Instrument Co. reserves the right to make improvements and/or changes to the product(s) and/or
programs described in this manual at any time and without notice.
All information referred to and/or included in this report is current as of the original issue date
of this manual. GOW-MAC®Instrument Co. makes no warranty or representation with respect to the
accuracy of the information or with respect to the suitability of the use of such information outside
GOW-MAC®Instrument Co., nor does GOW-MAC®Instrument Co. assume responsibility for any injury
or damage which may result, directly or indirectly, from the use of such information.
This document contains proprietary information which is protected by copyright. All rights are
reserved. No part of the document may be photographed, reproduced, or translated into another
language without the prior written consent of GOW-MAC®Instrument Co.
The warranties made by GOW-MAC®Instrument Co. with respect to the product are voided if
the product is not used and serviced in accordance with the instructions in this manual.
Please protect yourself and your employees by following these operating instructions. We
encourage our customers to write or call for any additional information relative to the use or repair
of this instrument.
TRADEMARK AND PATENT INFORMATION
®GOW-MAC is a registered trademark of GOW-MAC Instrument Co.
in the United States and other countries.
Other trademarks used herein are trademarks or registered trademarks of their respective owners.
Swagelok® - is a registered trademark of Crawford Fitting Co.
Parker® - is a registered trademark of Parker Hannin Corp.
Gyrolok® - is a registered trademark of Hoke, Inc.

Model 75-810 & 75-810-AR Noble Gas Purier
Rev. 0 11/20
5
LIABILITY Buyer assumes all responsibility for warning and protecting its employees and independent contractors with respect
to all hazards to persons and property in any way connected with the Equipment and the use thereof. Seller’s liability for any claim
of any kind hereunder, whether or not based on contract, tort (including negligence), strict liability, warranty, or any other grounds,
shall not exceed the purchase price of the Equipment or the portion of the purchase price attributable to any part or parts of the
Equipment in respect to which such claim is made. Seller shall not be liable for any special, indirect, incidental, or consequential
damages. Without limiting the generality of the foregoing, Seller shall have no liability with respect to the results obtained by use
of the Equipment, whether in terms of product condition, operating cost, general e󰀨ectiveness, success or failure, or regardless of
any statement made in any written proposal submitted by Seller. It is expressly understood that any technical advice furnished by
Seller with reference to the Equipment is given gratis and Seller assumes no obligation or liability for the advice given or results
obtained, all such advice being given and accepted at Buyer’s risk. Each party hereby agrees to indemnify and hold the other party
harmless from any actions, lawsuits, demands, claims, losses, expenses, costs, including but not limited to legal fees, and damages
arising from the injury, illness or death of the indemnifying party’s employees in any way related to the Equipment, whether or not
such injury, illness, or death is claimed to have been caused by, resulted from, or was in any way connected with the negligence
of the party to be indemnied.
PROPRIETARY INFORMATION Buyer agrees to maintain all proprietary information disclosed by Seller, including such
proprietary information obtainable upon examination of the Equipment, in condence and to refrain from any disclosure thereof to
any third party (including any a󰀩liate of Buyer), for any purpose, without the prior written consent of Seller. Buyer agrees to use
said proprietary information solely for purposes of maintaining and operating the Equipment, and to refrain from any use thereof to
design, construct, have constructed and/or operate any duplication or modication of the Equipment, or from any other use thereof,
without the prior written consent of Seller.
Models A󰀨ected
75-810-HE
75-812-HE
75-810-AR
75-812-AR

GOW-MAC Instrument Co.
6

Model 75-810 & 75-810-AR Noble Gas Purier
Rev. 0 11/20
7
Warranty
THE MODEL 75-810 NOBLE GAS PURIFIER SOLD BY GOW-MAC®INSTRUMENT CO. IS WARRANTED
FOR A PERIOD OF ONE (1) YEAR AGAINST DEFECTS IN MATERIALS AND WORKMANSHIP. THE
TERMS OF THIS WARRANTY ARE AS FOLLOWS:
1. The warranty period begins with the shipping date of the equipment to the original purchaser.
2. Certain parts such as septa, batteries, fuses, glass accessories, detectors, laments, columns, etc., are
expendable in normal use, and their service life is unpredictable. Such items are not covered by this warranty.
3. All requests for service or repair under this warranty must be received within the warranty period by
GOW-MAC®oritsauthorizedrepresentative.AllrepairsaremadeatGOW-MACplantsorattheoceof
authorized representatives.
4. All repairs, adjustments, and other service under this warranty shall be performed free of charge to the
purchaser. However, warranty service and repairs shall be limited to equipment malfunctions which, in the
opinion of GOW-MAC®, are due or traceable to defects in original materials or workmanship. Instrument
malfunctions caused by abuse or neglect of the equipment are expressly not covered by this warranty.
5. Instrument parts which have been repaired or replaced during the warranty period are themselves warranted
only for the remaining unexpired portion of the original six month warranty.
6. Repairs, adjustments, and service performed after expiration of the six month warranty period shall be
charged to the purchaser at the then current prices for parts, labor, and transportation.
7. This warranty attaches to the equipment itself and is not limited to the original purchaser. Unexpired portions
of the warranty are thus transferable to subsequent owners.
8. GOW-MAC®expressly disclaims any liability to users of its products for consequential damages of any
kind arising out of or connected with the use of its products.
9. Except as stated in Sections 1 through 8 above, GOW-MAC®makes no warranty, expressed or implied
(either in fact or by operation of law), statutory or otherwise; and, except as stated in Sections 1 through 8
above, GOW-MAC®shall have no liability under any warranty, expressed or implied (either in fact or by
operation of law), statutory or otherwise.
10. Statements made by any person, including representatives of GOW-MAC®which are inconsistent or in
conictwiththetermsofthiswarrantyshallnotbebindinguponGOW-MAC® unless reduced to writing
andapprovedbyanoceroftheCompany.
11. This warranty shall be governed by the laws of the Commonwealth of Pennsylvania.

GOW-MAC Instrument Co.
8

Model 75-810 & 75-810-AR Noble Gas Purier
Rev. 0 11/20
9
Noble Gas Purier
Models 75-810-HE/75-812-HE & 75-810-AR/75-812-AR
1 Introduction
The 75-810 series of puriers are designed for the purication of noble gas and
under no circumstances shall they be utilized for the purication of hydrogen,
nitrogen, oxygen, air or other reactive gases. Please read and understand the
following manual and documents prior to beginning the installation of the 75-
810. If there is anything not understood, please call for clarication prior to
operation. 75-810-HE/AR designates models for 120 VAC service and
75-812-HE/AR for 230 VAC service. All versions may be generically referred to as
75-810 throughout this manual where appropriate.
The GOW-MAC 75-810 series are point-of-use gas puriers that remove impurities
(H2O, O2, CO, CO2, H2, N2, CH4) from ultra-high purity (99.999%) argon or
helium. The bench-top conguration is compact with ¼ inch VCR connections
for gas in and out on the top panel. The getter material is heated to about
400 °C when the power switch is ON and illuminated. The heated cartridge
is wrapped in insulation that is easily removed for service. A second stage
getter for hydrogen removed is directly downstream from the rst stage. The
hydrogen trapping is more e󰀩cient when colder so that section of the cartridge is
wrapped in a heatsink to transfer heat away from the cartridge. The nal feature of
the ow path is an integral 0.003 micron particle lter. The 75-810 puriers
are factory-conditioned for optimal performance with helium or argon (denoted in the
part number by –HE and –AR).
UltraPure™ is a registered trademark of UltraPure Systems Inc.

GOW-MAC Instrument Co.
10

Model 75-810 & 75-810-AR Noble Gas Purier
Rev. 0 11/20
11
2 Safety Precautions
!
IMPORTANT
SAFETY WARNINGS
!
IMPORTANT
WARNING
This purier is intended for the purication of NOBLE* gas only. Under NO circumstances should it
be used for the purication of hydrogen, nitrogen, oxygen, air, or reactive gases.
Failure to comply can result in personal injury and/or mechanical damage to purier and all
warranties shall be void.
*Noble gas refers to Ar, He, Ne, Kr, Xe.
WARNING
This equipment processes gas using electrical equipment. Serious injury can result if maintenance
is performed with the power on. Always shut power o󰀨 at the facility circuit breaker before main-
tenance is to be performed. In addition, lock out the associated circuit breaker in accordance with
local safety directives to prevent an advertent operation by facility personnel until maintenance has
been completed and all personnel are clear of the machinery.
WARNING
This equipment processes gas at high temperatures. Serious burns can result. If maintenance is to
be performed, allow unit to cool to room temperature prior to any maintenance or service.
WARNING
Electric shock hazard potential exists inside the unit. Take the necessary safey precautions to avoid
touching exposed terminals and wiring. Failure to comply can result in death, personal injury or
damage to the purier.
WARNING
MAXIMUM VESSEL OPERATING PRESSURE: 250 PSIG

GOW-MAC Instrument Co.
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SAFETY CAUTIONS
CAUTION
All gas lines and connections MUST be leak-checked prior to operation of the unit in order
to ensure the integrity of the system and to prevent any exposure of the getter bed to
atmosphere. The getter material in the purier may be destroyed if exposed to
atmosphere while its temperature is above 150 °C.
CAUTION
If a gas line should become disconnected during normal operation, the purier must be shut
down and all inlet/outlet valves should be closed in order to isolate the unit from the facility
lines. This will limit the exposure of the getter bed to atmosphere while it is in
excess of 150 °C. Do not restart the purier until temperature has cooled to below
150 °C and all gas lines have been reconnected/repaired and certied. Failure to comply
can result in personal injury or damage to the purier.
CAUTION
The purity guarantees are void if installation is other than that approved by GOW-MAC
Instrument Company
CAUTION
During heated operation, this unit MUST be pressurized with noble gas and isolated from
any exposure to atmosphere or the getter bed will be destroyed.

Model 75-810 & 75-810-AR Noble Gas Purier
Rev. 0 11/20
13
3 75-810 Specications
Gases Puried He, Ne, Ar, Kr, Xe
*Impurities Removed: H2O, H2, O2, N2, CO, CO2, CH4
Impurities Not Removed: He, Ne, Ar, Kr, Xe
Operating Temperature: 400 °C + 25 °C
Temperature Sensor: K-Type thermocouple is integrated in
the heater, monitor the cartridge
temperature by connection with a
at pin connector to the receptacle
on the top panel
Maximum Recommended Operating Pressure: 17.0 atm (250 psig)
Suggested Maximum Flow Rates (ccpm): Model 75-810: 1500
**Gas Connections: 1/4" VCR® Male
Leak to Atmosphere <2 X 1010 atm-cc/sec helium
***Lifetime Purifying He or Ar: 75-810: 1 yr. @ 200 ccpm
Power Requirements: 75-810: 80 Watts, 120 VAC
75-812: 80 Watts, 230 VAC
Circuit Breaker In power switch, fast acting, 1A rating
Weight (net): 3.5 lbs.
Dimensions: 5”D x 4”W x 10"H
* Each impurity removed to < 10 ppb based on 10 ppm total inlet impurities at suggested
maximum ow rate
** VCR® is a registered trademark of Swagelok Corporation
*** Lifetime based on suggested maximum ow rates; a higher ow rate will proportionally
decrease the lifetime while a lower ow rate will increase the lifetime. The lifetime is rates at
10 ppm total inlet impurities; higher or lower inlet impurity levels will decrease or increase the
lifetime proportionally. The purier bed is considered an expendable item. System leaks, poor quality
gas, and improper handling will adversely a󰀨ect its useful life.

GOW-MAC Instrument Co.
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Model 75-810 & 75-810-AR Noble Gas Purier
Rev. 0 11/20
15
4 Installation
Locate the 75-810 on a table top with the rubber feet on the surface. In this position,
the gas in and out connections are on top and the purier cartridge is in the correct
vertical orientation which reduces gas channeling through the getter material.
Connect the 75-810 tting marked GAS IN to the source of carrier helium or
argon. A diaphragm shut-o󰀨 valve in the supply line will facilitate servicing
the 75-810. Recommended tubing specication is 1/8 inch OD X 0.028
wall, 316L stainless steel, cleaned or electropolished. Orbital butt weld a ¼
inch VCR® gland including a female nut for connection to the 75-810. Test any new
weld to verify there is no leak. Likewise prepare a tube to connect to the GAS
OUT tting. Connect the 75-810 GAS OUT to the CARRIER IN connection on the
gas chromatograph or ZERO GAS IN connection on an analyzer.
The at pin receptacle on the top panel allows monitoring of the cartridge
temperature. For usual operation, monitoring is not necessary because the
heater should operate at optimum temperature when the 75-810 is powered
on. It is during transitions to start-up and shut-down that knowing the
temperature is important, especially the 150 °C point that is referred to throughout
this manual. Use a at pin thermocouple connector (not provided) and K
thermocouple leads connected to a suitable meter to monitor 75-810 temperature.

GOW-MAC Instrument Co.
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Model 75-810 & 75-810-AR Noble Gas Purier
Rev. 0 11/20
17
5 Operation
Start Up
The purier should be purged with an inert gas (helium if -HE or argon if -AR
model, minimum purity 99.99%) for at least 10 minutes before powering on.
Apply continuous gas ow of 50 to 200 ccpm before and during initial activation.
After the 10 minute purge period, switch on power to the 75-810. The heater
is selected to heat the purier to about 400 °C. At this temperature, the purier
material will take 3 hours to fully activate. After this activation period, the purier is
ready to operate at the desired owrate.
CAUTION
IF THE 75-810 SUPPLY OR VENT LINE IS ACCIDENTALLY VENTED TO ATMOSPHERE,
ASSUME AIR HAS ENTERED THE PURIFIER. IMMEDIATELY SWITCH OFF POWER
AND FLOW HELIUM OR ARGON THROUGH THE PURIFIER AT 50 TO 200 CCPM
TO PURGE OUT ANY AIR. EXPOSURE OF THE GETTER MATERIAL TO OXYGEN
WHEN IT IS ABOVE 150 °C WILL DESTROY THE MATERIAL AND MAY INITIATE AN
EXOTHERMIC REACTION.
Examples of the performance of the 75-810 for helium and argon gases are in the
Appendix.
Shutdown
If the gas line containing the 75-810 is to be vented to air, for example during purier
replacement, then the purier must be at room temperature before venting to air. If
the purier is hot, switch o󰀨 power, maintain gas ow and wait 3 hours to allow the
purier to reach room temperature.

GOW-MAC Instrument Co.
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6 Maintenance & Servicing
Purier Lifetime
In order to maintain proper purication e󰀩ciency, do not exceed estimated lifetime
of the purier cartridge. The estimated lifetime (rst impurity breakthrough) is 1 year
at 400 °C operating temperature, 150 ccpm owrate, and inlet gas purity of
99.999%. First breakthrough of H2 or O2 at these conditions should be after about
4 years. Lifetime is inversely proportional to the total inlet impurity level and to the
average ow rate.
The getter material in 75-810 models cannot be regenerated so the cartridge must
be changed. In the unlikely event of H2 or O2 breakthrough, the hydrogen removal
stage can be regenerated in the eld.
Hydrogen stage regeneration
• Power o󰀨 the 75-810 and allow 3 hours to cool while maintaining minimum
50 ccpm inert gas ow through the cartridge. Monitor the temperature using
the K thermocouple on the unit. Ensure cartridge temperature is below 150 °C
before turning o󰀨 gas ow. Keep all gas connections intact if possible
to prevent ingress of air.
• Switch o󰀨 power on the 75-810 and UNPLUG THE POWER CORD.
• Open the case
• Loosen the hose clamp on the heatsink which is on the hydrogen removal
stage. Slide the heatsink away from the cartridge.
• Move the heater and insulation from the rst stage to the hydrogen stage and
re-tighten both.
• Check integrity of wire connections inside the case
• Follow the steps for initial activation in order to regenerate the hydrogen
stage. Refer to Section 5 Operation/Start Up for activation procedure.
• After regeneration, replace heater, insulation, and heatsink to their original
locations, check wire connections, and close the case.
Replacing the cartridge and/or heater
• Power o󰀨 the 75-810 and allow 3 hours to cool while maintaining minimum
50 ccpm inert gas ow through the cartridge. Monitor the temperature using
the K thermocouple on the unit. Ensure cartridge temperature is below 150 °C
before turning o󰀨 gas ow. Keep all gas connections intact if possible
to prevent ingress of air.
• Switch o󰀨 power on the 75-810 and UNPLUG THE POWER CORD.
• Open the case
• Loosen the hose clamp on the heatsink which is on the hydrogen removal
stage. Slide the heatsink away from the cartridge. Retain heatsink for
re-assembly.
Model 75-810 & 75-810-AR Noble Gas Purier
Rev. 0 10/20
19

GOW-MAC Instrument Co.
20
• Remove the insulation and retain for re-assembly
• Remove the heater and retain for re-assembly unless also replacing the
heater
• With one each 5/8 inch and ¾ inch open end wrenches, undo the VCR®
connections on the cartridge and remove the two gaskets, which should be
discarded.
• Insert the new cartridge, TAKING CARE TO PLACE THE FIRST STAGE
CLOSEST TO THE GAS IN FITTING. Use new VCR® gaskets provided with
the replacement cartridge. Assemble the VCR® nut nger tight and then use
the wrenches to tighten a further quarter-turn.
• Replace heater, insulation, and second stage heatsink. Tighten all hardware
and secure insulation and heatsink on the rst and second stages
respectively
• Check integrity of wire connections inside the case and close the case
• Follow the steps for initial activation. Refer to Section 5 Operation/Start Up
for activation procedure.
Waste Disposal
This procedure is for the purier cartridges in all models 75-810.
If the purier is used, then the getter material inside the purier is already in a non-
reactive state, (i.e. will not react with air).
If the material is still in a reactive state (i.e. the purier is not completely "used up"),
it still will not sustain combustion in air except at temperatures over 350 °C,
and with a continued exposure to air.
The operator should place a VCR® cap on the inlet and outlet ttings for su󰀩cient
precaution before disposal. It is then acceptable to deposit in an approved
landll, in accordance with local, state and/or federal regulations. When disposed of
in this manner, the waste poses no known environmental problems.