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FUELLING COMPONENTS LIMITED >
GAMMON CONTAMINATION TEST KITS
Introduction.
The ASTM specification for Aviation Turbine Fuels, D1655, calls for
the fuel to be ‘visually free of undissolved water, sediment, and
suspended matter’, and the standard tests for determining the level of
dirt/particulate contamination are ASTMD2276/IP216 and D3830. A
known quantity of fuel (normally 5 litres) is passed through standard
37 mm diameter discs of 0.8 micron filter paper under field conditions.
The discs are contained in Tenite plastic capsules, or monitors, along
with a 34 mm diameter support pad.
The Colormetric test is used as a qualitative assessment of particulate
contamination. In this test a single membrane is assembled into the
monitor on site, but in a clean area, and after testing it’s colour is rated
against a standard scale to identity changes in fuel cleanliness. This
test is instant and can be fully completed under site conditions. It is GTP-1172 Mark II
particularly useful in establishing trends in fuel cleanliness, so tested
membranes are dried and stored for later comparison.
The Gravimetric test is used to give a quantitative assessment of particulate contamination, and in this
test two factory matched weight membranes are assembled into the monitor under clean laboratory
conditions. After testing the laboratory re-weighs the two membranes and establishes the increase in
weight by deducting the weight of the downstream membrane from that of the upstream membrane.
Description. Inlet Connector (Multi Stainless Steel 2-way
The Mini Monitor kit was developed specifically Mini Monitor shown) Sample/Flush Valve
for aviation fuel testing using standard field
monitors. It comprises an Inlet Connector which
interfaces with the sampling point in the pipe-
work, a Stainless Steel 2 way valve to control the
Flush and Sample operations, a Bypass Hose for Bypass
flushing the line contents, and a Housing which Hose
Housing
holds the pre-assembled plastic monitor. Bond-
ing leads and clips are provided to connect to the
pipework and container into which the fuel is
measured. Drain Hose
Grounding Wire
Designed to avoid “white spot”.
All previously manufactured test kits, regardless of brand, make a
white spot in the centre of the filter membrane if the inlet pressure is
high and the fuel sample is contaminated.
The Mark II version eliminates the white spot by uniformly dispersing
the fuel.
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Aljac Fuelling Components Ltd., Pitfield House, Station Approach, Shepperton, Middx. TW17 8AN. UK.
Tel: 44 (0) 1932 269869. Fax: 44 (0) 1932 269230. email: sales@aljac.com DSS0144-11
Method of Operation.
The Gammon Mini Monitor/Multi Mini Monitor uses standard plastic monitors as defined by the ASTM for
test method D2276/IP216. The plastic monitor is assembled with the support pad located under the
membrane. Use the tweezers to handle the membrane and pad so as not to contaminate them prior to the test.
Push fit the inlet and outlet halves of the plastic monitor together and remove the red and blue stopper. Insert
the monitor into the housing and screw together hand tight. The loaded plastic monitor is now ready for use.
Support Pad Membrane
Outlet half
Inlet Half
Before starting set the Valve to STOP. Check the Bypass Hose
connections for firm seating. Couple the Inlet Connector to the
Sampling Point in the pipework. After checking all connections
set the Valve to FLUSH and allow 5 litres (or other specified
volume) to collect in a measuring container. Then move the
Valve to TEST in order to direct flow through the filter
membrane. The test volume is normally 5 litres but depends on
local operating regulations, and when the specified volume has
been passed through the membrane set the Valve to STOP and
disconnect from the Sampling Point. After removal of the
membrane and support pad the membrane colour is then rated
using the GTP-1074-1 color rating booklet which is included in the kit. The darker the membrane, the dirtier
the fuel. Some contracts require the weight of the contaminant to be determined. The same apparatus can be
used but arrangements must be made with a laboratory.
Electrical bonding is a safety requirement of ASTM Method D2276. The bonding and grounding hose
assembly clips to the metal measuring container (not shown) and also to pipe fitting as shown in the
photograph.
Fuel Sampling Bottle.
The traditional method of collecting and measuring the fuel volume
which has been flushed or sampled has been to use a graduated Vented Screw Cap Quick
Stainless Steel bucket (bonded to the test kit). However, this is not Disconnect
ideal when the fuel has to be processed after completing the test. The
fuel can easily spill when the bucket is moved and the bucket is open
to the elements and so the fuel may become contaminated (and so not Carrying
Handle
able to be returned to the fuel system). Also, the graduations on
Stainless Steel buckets are sometimes not easy to read.
We have a 10 litre graduated, semi transparent, impact resistant
Polyethylene Fuel Sampling Bottle to collect, measure and move the
fuel in a more user friendly manner. It has a quick disconnect
coupling which connects to the Gammon kit drain hose and the fuel
level can be seen through the side of the bottle and easily compared Stainless
with the graduations. The Bottle has a Stainless Steel base and frame Steel Base/
Frame
which is connected to an internal Stainless Steel grounding wire. The
wire collects any static charges inside the fuel itself and allows them
to dissipate to ground through the frame and base. The Bottle has an
integral Carrying Handle so that it can be easily moved around and a
vented screw cap which can be removed to drain the fuel from the
bottle.
Fuel Sampling Bottle. Part No. 08PP18569.
Gammon Mini Monitor/Multi Mini Monitor Contamination Test Kit.
The Gammon Test Kit comes in 2 variants. The Mini Monitor has a male inlet connection and is suitable
for use as it stands with the Gammon, Millipore or Snaptite sampling points ONLY. However, the Multi
Mini Monitor is intended for locations where a range of different sampling points are in use. It has a female
self locking quick disconnect inlet connection and can be fitted with a range of reversible adapters to
accomodate the sampling points on site. The available options are shown below.
GTP-172 Mark II. GTP-1172 Mark II.
Mini Monitor. Multi Mini Monitor.
Part No. 6002017200. Part No. 6002117200.
Option A
GTP988.
Part No. 6002098800
approx.
31mm Fits Gammon Jet Test QD,
Fits Gammon QD, Carter, Parker/Thiem/
Millipore, Snap Tite etc. Whittaker couplings.
Option B
GTP988-1.
Part No. 6002098801
approx.
Fits Gammon QD, 22mm
Same as GTP-988 except it
Millipore, Snap Tite etc. fits the short (S) or AH
Models of Gammon Jet Test
QD, Avery Hardoll couplings.
Option C Option D
Fits Flight Refuelling 4127335 and 4127365 Fits Flight Refuelling 4127320, 4127345 and
Adapter (Howden Wade/Thermal Controls), 4127350 Adapter (Typ Shell International), 1/2
3/4 inch BSPP thread, 26.4mm diameter. inch BSPP thread, 20.9mm diameter;
Part No. 60021170AO Part No. 60021170B0
Option E
GTP988-2.
Part No. 6002098802
Fits Gammon Jet Test QD Fits the short (S) or AH
models of Gammon Jet Test QD
