Interface Devices OB-30 Instruction manual

O2 Booster Manual M99-1002-F November 2019
OB-30 OXYGEN BOOSTER
INSTALLATION, OPERATION
& MAINTENANCE MANUAL
INTERFACE DEVICES, INC. 230 Depot Road, Milford, CT 06460
Ph: [phone], Fax: [phone], E-mail: [email protected]
www.interfacedevices.com
Safety instructions specifically pertaining to this unit appear throughout this
manual:
Warning: denotes practices, which if not carefully followed, could result in property
damage, SERIOUS personal injury and /or DEATH
IN ADDITION TO READING THIS MANUAL, IT SHOULD BE MANDATORY FOR ALL
USERS TO VIEW THE OB-30 TRAINING VIDEO AT:
OB30training.com
OB-30 Serial Number:___________________
This manual covers specifications and information for models dating from 2005
and the latest design model from 2013. Please take note of the items pertinent to
the model vintage being used.
Save the original packaging in which the OB-30 was received to be used for
returning the unit for recertification.
Note “oxygen” & the chemical symbol “O2” are used interchangeably throughout
this manual.
IMPORTANT! FILE THIS MANUAL IN A SAFE PLACE FOR FUTURE SERVICE & PARTS NEEDS
ALWAYS REFERENCE THE SERIAL NUMBER FOR SERVICE & PARTS REQUESTS

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
2
STATEMENT OF WARRANTY
INTERFACE DEVICES, INC. (hereafter, the factory) warrants its products to be free from
defects in material and workmanship under normal use and service for a period of one (1)
year from date of shipment from the factory. Any defect discovered after the warranty period
has expired will be deemed to be outside the above coverage. No goods claimed to be
under warranty shall be accepted for return unless authorized by the factory beforehand.
Upon discovery of a defect (other than freight damage) or a shortage of an item received in
the original factory container, the purchaser shall, within (10) calendar days, deliver notice of
the defect or shortage. Damaged freight claims must be placed with the freight carrier and
will not be honored by the factory. If, after due investigation of a claim of defect or for
shortages is found valid, the factory, at it’s sole discretion, may discharge it’s entire
obligations to the purchaser by either repair or replacement of the defective product or
component and for shortages by furnishing a replacement of the missing quantity (FOB,
factory).
This express warranty supersedes and is in lieu of all other remedies and warranties,
including the implied warranties of merchantability and fitness for a particular purpose, and
liability for negligence.
IN NO EVENT SHALL THE FACTORY BE LIABLE TO THE CUSTOMER OR ANY OTHER
PERSON OR ORGANIZATION FOR ANY INDIRECT, INCIDENTAL, CONSEQUENTIAL,
SPECIAL, OR EXEMPLARY LOSSES, EXPENSES, OR DAMAGES ARISING OUT OF OR
RELATED TO ITS PRODUCTS, INCLUDING WITHOUT LIMITATION, ANY DAMAGES
FOR DIMINUTION OF MARKET VALUE, LOSS OF USE, LOSS OF PROFITS OR OTHER
FINANCIAL OR ECONOMIC LOSS, OR FOR ANY INTERRUPTION IN CUSTOMER’S
BUSINESS OCCASIONED BY ITS INABILITY TO USE THE PRODUCTS FOR ANY
REASON WHATSOEVER, EVEN IF THE CUSTOMER HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES OR LOSSES. THE FACTORY SHALL NOT BE
LIABLE FOR ANY DAMAGES CLAIMED BY THE CUSTOMER OR ANY OTHER PERSON
OR ENTITY WHETHER BASED ON CONTRACT OR IN TORT.
**WARNING**
There is an inherent risk associated with pressurized oxygen systems. Failure to follow
the manual’s instructions or other safety procedures increases the risk of an ignition
source being introduced into the oxygen flow stream that could result in a fire,
explosion, property damage, serious personal injury or death. In addition to following
the OB-30 manual instructions, remember to take appropriate safety measures with all
components in the oxygen system. In no event shall Interface Devices, Inc. be held
liable for any property damage, injury or death in the event the OB-30 booster is NOT
installed, operated or maintained in strict accordance with this manual and other
published oxygen service guidelines.

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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Table of Contents
1.0 General Description………………………………………………. 4
2.0 Specifications / Features ................................................................. 6
2.1 High Pressure Oxygen Booster
Component Description................................................................... 6
Non-Booster Component Pictures………………………………...7
3.0 Preparation for use.......................................................................... 8
3.1 Safety Instructions........................................................................... 8
3.2 General Safety Instructions............................................................ 8
3.3 Installation ..................................................................................... 10
4.0 Operation ....................................................................................... 11
4.1 Preparation for Operation............................................................ 11
4.2 Charging The Aircraft Oxygen System....................................... 11
4.3 Disconnecting from Aircraft......................................................... 12
5.0 Maintenance................................................................................... 12
5.1 Precautions & Procedures............................................................ 13
5.2 Preventative Maintenance Schedule………………………….... 13
5.3 Spool Lubrication Guideline ........................................................ 14
5.4 Storage ........................................................................................... 14
5.5 Recertification................................................................................ 15
6.0 Oxygen System Specification Information.................................... 16
7.0 Trouble Shooting.............................................................................. 17
8.0 Table 1 – Temperature Correction……………… ........................ 18
Drawings.............................................................................................19-28
Appendix A (Coalescing Filter) ............................................................. 29
Appendix B (Excess Flow Valve)………………………………………36

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
4
1.0 General Description
80 psi drive pressure produces 2,200 psi oxygen pressure
Shop air or nitrogen powered for use in and around the hanger
Designed for Safety:
Oxygen wetted components are principally brass – one of the best materials for oxygen
service surpassing materials such as stainless steel for ignition resistance in a pure
oxygen environment
All oxygen wetted parts have been cleaned per Spec. ARP 1176
Other materials are optimized for oxygen service including a Monel™ shaft for 2013
models and in 2005 model recertified units
Features:
No inlet valve. Air regulator or lubricator required
A coalescing drive filter is supplied and should be installed as near as possible to the
drive inlet
Dual 10 micron filters are included for the oxygen in and oxygen out ports
Integral cut-in and cut-out pressure switches. Pump will not run if oxygen
inlet pressure is below 250 psi or oxygen outlet pressure is above 2,400 psi
Polymeric seals and bearings for long life and high efficiency
Sparkless operation
To preclude drive supply from contaminating oxygen, twin rod seals are supplied with
a vent to atmosphere that minimizes the likelihood of drive media/oxygen migration
Integral air regulator with pump on/off air toggle switch
May be nitrogen-powered for remote operation
Excessive flow shut-off valve is supplied loose to mitigate risk/damage in the unlikely
event of an ignition incident or opening of the oxygen bottle too quickly. This valve is
supplied with newer models, available for retrofit for older models or units returned for
recertification

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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** Warning **
To Avoid Serious Injury, Property Damage or Death
1. Never operate the OB-30 unattended
2. Always have a properly rated and charged fire
extinguisher close at hand
3. Routinely check the drive filter and replace the
element in accordance with recommended
maintenance practices. (See paragraph 3.2.4 and
Apendix A).
4. Do not use on LOW PRESSURE aircraft systems.
This is an UNREGULATED OXYGEN
SOURCE equal to supply bottle pressure.
The use of a supply bottle pressure regulator is
required with this unit.
5. Do not use to boost air or any gas other than oxygen.
6. Do not exceed 2,200 PSIG inlet pressure.
7. All components used in the oxygen system shall be
clean, dry and free of all contamination per
specification SAE ARP1176.
8. Servicing and/or maintenance of oxygen systems shall
be done by trained and qualified personnel using
approved procedures.
9. All components in conjunction with the OB-30 booster
shall comply with NFPA – 53 “Recommended
Practice on Materials, Equipment, and Systems Used
in Oxygen-Enriched Atmospheres” - 2011 Edition
and SAE Spec. ARP 1532, “Aircraft Oxygen System
Lines, Fabrication, Test and Installation.”

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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2.0 Specifications / Features
Dimensions: 14” long (2005)/15” long (2013), 9.4” high and 8.9” wide.
Weight: 42 lbs (2005)/ 45 lbs (2013) complete.
Input & output hoses required: stainless steel/Teflon® -4 JIC rated to 3,000 psi.
Booster output rating = 2,200 psig.
Oxygen booster ratio: 30:1.
2.1 Component Description (Refer to Fig. 1a. for component location.)
1. Air or nitrogen inlet port (1/2 NPT).
2. Air regulator & gauge.
3. Booster On/Off air toggle switch.
4. Oxygen out port –4 JIC fitting 2,200 psig max.
5. Oxygen in port –4 JIC fitting 2,200 psig max.
6. Oxygen in (supercharge) pressure gauge.
7. Oxygen out pressure gauge.
8. Cut in/cut out pressure switches (factory preset).
9. Air vent filter.
10. Coalescing inlet filter, shipped loose. See Appendix A.
11. Excessive flow shut off valve, shipped loose. See Appendix B. Not included with
2005 models but available for models returned for recertification or as a retrofit.
12. Drive pressure relief valve.
Figure1a.

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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Coalescing Inlet Filter
Excessive Flow Valve (Included with 2013 Models.
Factory Recommended for Retrofit on 2005 Models)
ID/Date Label for Coalescing Filter.
To be Applied Prior to Installation

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
8
3.0 The OB-30 Preparation for Use
3.1 Safety Instructions
3.1.1 Information presented in this manual and on various labels, tags and plates on the unit plus other
system components pertains to equipment design, installation, operation, maintenance and
troubleshooting which must be read, understood and followed for safe and effective use of this
equipment. Also, refer to the OB-30 Training Video at http://OB30training.com.
3.1.2 The operation, maintenance, and trouble shooting of the OB-30 oxygen booster require practices
and procedures that ensure personal operator safety and the safety of others. Therefore, this
equipment is to be operated and maintained only by qualified persons in accordance with this
manual and all applicable local codes.
3.1.3 Any air compressor used to drive the booster must only supply clean, dry and filtered air. The OB-
30 comes with a coalescing filter that reduces the risk of water or compressor oil being introduced
to the booster, but a separate filter and dryer should be installed at the exit of the compressor.
Safety instructions specifically pertaining to this unit appear throughout this manual
highlighted by the signal word **Warning** to denote a potential hazard.
Warning: denotes practices, which if not carefully followed, could result in property damage,
SERIOUS personal injury and /or DEATH
3.1.4 Read through this entire manual prior to oxygen booster operation. All personnel using the OB-30
booster must understand and follow this manual and be fully trained in handling pure oxygen under
pressure. Users are encouraged to call Interface Devices, Inc. to discuss any operating or testing
requirements. All operators of the OB-30 must be familiar with high-pressure oxygen service per
the NFPA-53 publication: “Oxygen System Recommended Practices and Materials” and SAE
Specification ARP 1532
3.2 General Safety Precautions
** Warning **
It is mandatory that this instruction manual be read, understood
and followed by all persons operating this high-pressure oxygen
booster.

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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3.2.1 Gasses under pressure are a potential hazard in the form of stored energy. Accidents can occur
when this energy is improperly handled. Be sure that all equipment used is compatible and
designed to control the pressures encountered.
3.2.2 Oxygen flowing at a high velocity in a system can propel particles with such force that the impact
friction can raise the particles temperature to a possible ignition point. It is therefore imperative that
the components in the oxygen system be cleaned per SAE ARP1176 or equivalent specification at
all times and instructions for initializing oxygen flow be closely followed. An excessive oxygen
flow valve is available that will stop the flow of oxygen when above safe conditions. In the event
the valve stops the O2flow, depressurize the entire system to reset the valve and begin safe
operation with less flow.
3.2.3 Oxygen is a gas that promotes combustion; especially at high pressures. It is chemically stable, and
non-flammable but will, combined with other elements support combustion especially at elevated
pressures.
It is important to understand that combustion of materials such as oil can occur in oxygen rich
atmospheres resulting in ignition of materials including metals such as stainless steel.
3.2.4 The coalescing inlet filter and the vent filter need to be inspected prior to each use. The coalescing
filter element must be changed when the red indicator on the filter is on, contaminants are suspected
to be present or at least once per year, whichever occurs first. The vent filter must be changed
annually or immediately if contamination is present or even if the filter is thought to have been
compromised.
3.2.5 The use of oxygen approved lubrication in an oxygen system should be kept to a minimum. The
OB-30 requires regular lubrication of the air spool with Christo-Lube MCG-111 certified for
oxygen environments. An air line lubricator is not to be used. No lubricant shall be applied in any
area that will come into direct contact with oxygen during normal use.
** Warning **
Hydrocarbon based lubricants cannot be used. Only lubricants compatible with high pressure
oxygen systems shall be used. Only oxygen approved lubricants such as Christo-Lube MCG-
111 can be used
** Warning **
High oxygen concentrations can accelerate the combustion of most materials
including most metals up to and including explosion or serious fire.
** Warning **
High oxygen concentrations can accelerate the combustion of flammable
materials up to and including explosion. Familiarity with the excessive flow valve
mounted to the bottle for proper operation and maintenance is imperative.

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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3.3 Installation
3.3.1 Although the oxygen booster is inspected prior to shipping, it could be damaged during shipping.
Therefore, it should be carefully unpacked and placed on a clean level surface for inspection.
3.3.2 The OB-30 booster is shipped with special, high strength packaging. This packaging needs to be
saved for future use such as when returned for recertification.
3.3.3 The bottom of the booster is furnished with three ¼-20 by ½” deep tapped holes for mounting to a
bracket or cart.
3.3.4 Customer installed parts (oxygen components must be in accordance with NFPA-53).
a. Two stainless steel/PTFE –4 hoses rated to 3,000 psi working pressure
b. Aircraft pressurization attachment fitting
c. Coalescing inlet air filter rated to 125 psi at 40 SCFM (shipped loose)
d. 2013 models include an excessive flow valve (shipped loose)
e. 2005 models should be retrofitted with an excess flow valve cleaned and approved for
oxygen service from the factory or other source
f. Oxygen shut-off valve (mounted away from the booster)
3.3.5 Install the coalescing filter as near as possible to the booster inlet.
3.3.6 Install the excessive flow valve immediately after the regulator on the oxygen bottle.
3.3.7 Remove protective caps from “O2IN” and “O2OUT” fittings.
3.3.8 With oxygen supply regulator closed, connect both -4 hoses to the oxygen in and out fittings on the
booster.
3.3.9 Attach aircraft pressurization fitting to the far end of the -4 hose coming from the oxygen out hose.
3.3.10 Check all components for integrity and contamination. If all is well and thoroughly checked
to be in compliance, the OB-30 is ready for use.
** Warning **
The customer supplied oxygen supply must be complete with shutoff valves,
pressure gauges, pressure regulators and Stratoflex® -4 hose. All components
must be rated for 3,000 psi working pressure, cleaned for oxygen service and
c
onform to
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FPA-
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ui
d
el
i
ne
s
** Warning **
Always inspect unit before use. Damaged, contaminated or oily equipment must
never be used.

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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4.0 Operation
4.1 Preparation for Operation
4.1.1 Be sure all valves and controls are in the closed or “failsafe” position.
4.1.2 Decrease item 2 (figure 1a, page 6) inlet pressure regulator to minimum pressure setting.
4.1.3 Inspect all connections for contaminants before installation and tightening. Inspect and
replace any suspect components. Be sure all oxygen components are clean per SAE
specifications and comply with NFPA-53 publication: “Oxygen System Recommended
Practices and Materials”and SAE Specification ARP 1532.
4.1.4 Connect the output of the gas supply bottle to the gas inlet connection of the oxygen booster
(See figure 1a, page 6).
4.1.5 Decrease the gas supply bottle or shop supply air/gas regulator to the minimum pressure
setting.
4.1.6 Connect the O2fill line loosely to the aircraft and purge line by SLOWLY cracking open gas
supply bottle shutoff valve and adjusting the supply bottle pressure to a low flow setting.
4.1.7 Tighten the O2fill line connection at the aircraft.
4.1.8 The OB-30 booster is ready to charge an aircraft O2System.
4.2 Charging the Aircraft Oxygen System
4.2.1 After the oxygen booster has been properly connected, slowly open the O2supply bottle shut
on/off valve. Adjust the gas supply bottle pressure regulator to the required aircraft O2system
pressure. Wait until the bottle pressure and the aircraft system pressure are equal. If the flow of
oxygen ceases, the flow valve has probably been triggered. Depressurize the system to reset
the valve and reopen the oxygen supply at a lower flow.
4.2.2 Note: If the bottle pressure is lower than the required aircraft oxygen system pressure,
be careful not to over adjust the supply bottle pressure regulator once the maximum
** Warning **
Be sure fill line is secured prior to purging the unit. This will prevent the hose
from whipping about if too much O2is allowed to flow through the unit.

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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supply bottle pressure has been achieved. Increasing the oxygen pressure regulator
beyond this point will not increase output, and may damage the regulator spring.
4.2.3 Adjust the booster’s air pressure regulator to attain a pressure slightly lower than the final
required O2pressure (divide this oxygen pressure by 30 to find the initially required regulated
air pressure setting). Example: 2,200 psi final pressure minus 100 psi equals 2,100 psi, divided
by 30 equals 70 psi regulated air pressure.
Note: If the ambient temperature at the time of oxygen system recharging is above or
below 70 degrees Fahrenheit, refer to Table 1 to determine the correct final pressure.
4.2.4 Turn on the booster’s “pump run” toggle switch to “on” to further pressurize aircraft oxygen
system. Note: Because the oxygen booster pump operates at a theoretical ratio, actual boosted
oxygen pressures may vary slightly due to different physical conditions. The oxygen outlet
pressure gauge will show the aircraft system pressure developed by the oxygen booster. When
the set pressure that has been achieved (i.e.: booster stops pumping), increase the pressure of
the air regulator to obtain the required final aircraft system pressure. Turn off the booster’s air
toggle switch when the booster has stopped running.
4.3 Disconnecting the Oxygen Booster from the Aircraft
4.3.1 Close the oxygen bottle shut off valve.
4.3.2 Decrease both the air inlet pressure regulator and the oxygen supply bottle pressure regulator
to their respective minimum settings.
4.3.3 Disconnect booster’s air (or nitrogen) supply line.
4.3.4 Slowly loosen, bleed down, and disconnect oxygen hose at the aircraft. Disconnect the O2
supply hose from the bottle
4.3.5 Cap both all exposed hose connections to prevent contamination.
5.0 Maintenance
** Warning **
Maintenance must be undertaken by qualified personnel only.
The operation, maintenance and troubleshooting of the oxygen booster system
requires practices and procedures which ensure personal operator safety and the
safety of others. Therefore, this equipment is to be operated and maintained only
by qualified persons in accordance with this manual and all applicable codes.

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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5.1 Precautions and Procedures
5.1.1 All maintenance performed on the OB-30 oxygen booster shall be conducted in accordance with all
applicable codes governing the handling, operation, installation and trouble shooting for high-
pressure O2operation. Maintenance is to only be done by qualified persons.
5.1.2 All personnel must be familiar with the warnings associated with high-pressure O2 systems as
outlined in sections 3.1 and 3.2 of this manual prior to performing any maintenance on this unit.
5.1.3 The oxygen pressure gauges on this unit are supplied for reference purposes. Calibrated and
certified gauges should be used for determining final pressure to the aircraft, which are
available from the factory at time of purchase or upon request during recertification.
5.2 Preventative Maintenance Schedule
Item Usage Task Action Required
General Inspect all components prior to
every use for contaminants or
damaged/suspect components
Return the booster for recertification
if the booster or other components
have been suspected to have been
compromised or after 1500 hours of
operation or after 2 years, whichever
comes first
Reciprocating Circuit
(See paragraph 5.3.1
below for instructions)
Ensure the drive section and
reciprocation circuit are clean and
lubricated with oxygen approved
Christo-Lube MCG-111
Lubricate the spool section every 6
months using ONLY lubricant
approved for oxygen service such as
Christo-Lube MCG-111
Vent Filter Inspect prior to every use to ensure
cleanliness Replace the vent filter annually or immediately if it appears to be
contaminated
Coalescing Drive Filter Inspect prior to every use to ensure
cleanliness. Verify the filter
indicator is green and not red
Replace the filter element annually,
when the filter indicator turns red or
immediately if it appears to be
contaminated
Other System
Components Inspect prior to every use to check for contaminants and ensure
cleanliness
Replace any component that may
have been compromised in any way.
Consult the manufacturer of the
component for additional
instructions
The exterior of the OB-
30 is dirty or
contaminated in any
way
Do not use the booster Return for factory recertification

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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5.3 Spool Lubrication Guideline
5.3.1 Provided the booster is not due for recertification, this section offers tips on lubricating the
spool. If the booster is beyond the two-year time frame for required certification or
compromised in any way the booster must be returned for service and recertification. As part
of this process, the factory will tend to spool section lubrication.
To lubricate the spool section of the booster, refer to drawing number P33-1003 or P33-1004
in this manual. Remove the 2 cap screws securing item 9, Retainer Cap and item 15, Spool
Cap. Extract item 6, Spool by pushing it from the Retainer Cap end using your pinkie finger
or a blunt, soft small diameter tool. CAREFULLY remove the Bushings, O-rings and all
Cages and Tee Seals, items 4 and 5, one at a time. You may need a pick type tool, which
should be made from a soft material such as brass.
Clean all the extracted parts with a parts cleanser approved for pure oxygen wetted
components and wipe clean. Apply Christo-Lube MCG-111 synthetic oxygen approved
lubricant to the spool, cages and tee seals. Snugly install the retainer cap and then, one part at
a time, put the assembly back in the spool cavity including O-rings, Bushings, Tee Seals and
Cages. Ensure the Spool is free to move. Install the Spool Cap and tighten the cap screws on
both the Spool Cap and Retainer Cap.
Note: Oxygen compatible synthetic Christo Lube MCG-111 is available from the factory in 2
oz. tubes.
5.4 Storage
5.4.1 Store the unit away from any aircraft in a clean, dry and secure area when not in use. Be sure
all hoses are capped and the unit is covered with a lint free covering for the duration of unit
storage to ensure complete O2system cleanliness for future aircraft system recharging

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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5.5 Recertification
5.5.1 The OB-30 must be inspected prior to each use. If, after conducting the OB-30 inspection, it is
believed it may have been compromised with suspect components or sub-optimal operational
or maintenance practices it must be returned for a complete inspection, cleaning and
recertification. Recertification is also required for any OB-30 that has been in service for 1500
hours or two years since its last factory certification, whichever occurs first. OB-30 boosters
being returned for recertification can only be sent to:
Interface Devices, Inc.
230 Depot Rd.
Milford, CT 06460 USA
The OB-30 is heavy for its size, so purpose built packaging is used to ship the booster. BE
SURE TO SAVE THE ORIGINAL BOX/PACKAGING as this was designed specifically to
transport the OB-30 booster for return to IDI when recertification is required. Contact IDI
prior to returning the booster to obtain a Return Merchandise Authorization (RMA). Be sure to
have the OB-30 serial number. The company, contact name, phone number & e-mail address
MUST be included with the booster being returned.

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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6.0 Oxygen System Specification Information
For more information about the specifics of the OB-30 booster, contact:
Interface Devices, Inc.
230 Depot Rd.
Milford, CT 06460 USA
Tel[phone]
OB-30 Training Presentation: http://ob30training.com
For more information concerning specific SAE Aircraft Oxygen Equipment Specification, contact:
Society of Automotive Engineers
400 Commonwealth Drive
Warrendale , PA 15096-0001 USA
Tel: [phone]
For more information concerning specific Oxygen System Recommended Practices and Materials
contact: National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02169-7471 USA
Tel: [phone]

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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7.0 Trouble Shooting
Troubleshooting Chart
Symptom Probable Cause Remedy
Pump will not cycle
(Only regulated
oxygen Pressure at
out put.)
No air supply to pump
Pump regulator set too
low
Four way air
reciprocating valve
spool stuck at mid
position
Look for and fix
Increase setting
Disconnect/ reconnect air supply (resets air spool to end position)
If spool still sticks, manually push spool to far end with probe through
hole in “spool stop cap”. If stuck or requires excessive force,
disassemble air valve assembly. Inspect for contamination or
mechanical bind. Repair or replace, lubricate seals with Christo-Lube
MCG-111 lubricant or other oxygen approved lubricant. Refer to the
OB-30 Exploded Assembly Drawing in this manual
Pump makes one
cycle then stops
Faulty “2 way air valve”
(Broken, leaks or
contaminated)
Repair or replace
Pump cycles
constantly when dead
headed (discharge of
the unit is plugged
preventing output
flow of oxygen)
External leak at pump or
downstream high-
pressure circuit
Contaminated or stuck
open check valve
cartridge
Internal leak in pump
Look for and correct
Clean or replace
Check all dynamic and static seals and gaskets
No O2flow to booster
from the bottle
Excessive flow valve
has closed (where
applicable)
Reset valve by depressurizing the entire system per manufacturer’s
instructions.
For further assistance, call Interface Devices, Inc. at 203-878-4648.
** Warning **
Troubleshooting can only be undertaken by qualified personnel trained in
servicing oxygen equipment only.

INTERFACE DEVICES, INC.
OB-30 OXYGEN BOOSTER
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8.0 Table 1
Temperature/Pressure Correction
At Temperature
Degrees F Fill to Working Pressure x Figure Below
110° 1.1000
105° 1.0875
100° 1.0750
95° 1.0625
90° 1.0500
85° 1.0375
80° 1.0250
75° 1.0125
70° 1.0000
65° 0.9875
60° 0.9750
55° 0.9625
50° 0.9500
45° 0.9375
40° 0.9250
Example: Ambient Temp. = 90° F, Working pressure is 1800 PSIG
Charge Pressure = 1800 PSIG * 1.0500 = 1890 PSIG