Rinse Cleaning Cart circulates heated cleaning solution — Alconox,
Liquinox or Simple Green Crystal —
through the sample train, then flushes the system with distilled water to
purge contaminants and deposits to
ensure more accurate results.
The system incorporates a 4. 6 gpm
pump and 1. 25 k W heater operated on
120 V ac power that raises the temperature of the cleaning solution to 140°F.
The cleaning solution is contained in
twin 5 gal. tanks.
“A lot of our customers have huge
systems with lines sometimes running
through trenches and overheads,”
Martinich said. “When they started
to see hang-up, they were taking the
systems all apart and then trying to
flush them out.
“We worked up a system that has an
air-actuated diaphragm pump that has
a pulsing action that’s like an agitation.
It’s a closed-loop system, so you take
out all the filter elements and disconnect the transducers and analyzers
and bring a return line down from the
farthest point that you want to clean
back to the cart.
“Then you run the 140° solution
through the system, for one or two
hours depending on how dirty the sys-
tem is. After that, you switch over to
clean distilled water for another hour
to rinse it out and then blow it out with
dry nitrogen and you can put your fil-
ters back, reconnect your transducers
and you’re ready to go.”
Martinich, who had a long career
in engine testing at GM prior to com-
ing to Neptech, said he expects the
cleaning cart to relieve a lot of con-
cerns when it comes to system clean-
ing. “I was on the user end of this for
35 years,” he noted. “The risk in dis-
assembly is that someone’s going to
cross-thread something on the reas-
sembly. That’s not uncommon and
sometimes they’ve had to replace
expensive sample lines because of
that. This makes the whole process a
lot simpler and safer.” dp
it’s like a big capacitor, and you lose
a lot of resolution. So we made it
physically as small as we could.
Then the more coarse the surface,
the more hydrocarbons are going to
bond with that surface. So we electropolish that and the coating adds
another layer of performance. It’s
just less sticky to the sample.
“What it means is that the ammo-
nia level entering the filter is the
same coming out and that’s what
the coating is doing. There’s no
absorption or chemical reaction to
affect the ammonia values.”
Neptech has also engineered a
portable system to clean sampling
lines in emissions testing systems.
Developed in cooperation with a
large U.S.-based diesel engine
manufacturer, the Neptech Dual
the heater right to near the end cap,
which is not a conductor of heat.
We’ve extended and are getting as
much benefit as we can out of that
heating element by not having heat
sinks that take heat away.”
Finally, the hose end caps and sili-
con boots have been beefed up to
withstand the lab environment. “The
end of the line has traditionally been
vulnerable and not able to withstand
much abuse,” said Rick Zalewski, vice
president of Neptech Inc. “We under-
stand that the technicians that use
heated sample lines need to not worry
about the durability of the construc-
tion of such a product rather have the
peace of mind knowing we took that
into consideration for them.”
“Our end caps can take a pretty
good beating with that silicone section
and protect the line,” Martinich added.
Neptech has also improved the
design of its heated filter housings,
which can be used as part of a heated
filter array or as a stand-alone unit.
The filter housings incorporate internal 316 stainless-steel filter housing
and are engineered to improve sample
response time. Available in two standard sizes — 1 x 2. 5 in. and 1 x 7 in. —
they utilize high-temperature ball valves
that provide a leak check function and
incorporate a heavy-duty brushed and
anodized aluminum enclosure with an
NEMA ML- 2 Mini-Twist Lock power
connector to connect the heating element to a customer-supplied temperature controller system.
The filter housings can be ordered
with the SilcoNert 2000 coating to
improve resistance to ammonia
“We did several things with this particular filter housing,” Martinich said.
“We narrowed down the internal volume of the filter as much as practically
possible so the transient response time
through the filter is greatly improved
over units that are much larger in diameter and longer.
“In the lab, they’re looking to see
those transient spikes — it’s all about
the spikes and what happens exactly
when. You go into a big volume tank,
Neptech has also engineered a portable
system to clean sampling lines in emissions testing systems. The Neptech Dual
Rinse Cleaning Cart circulates heated
cleaning solution through the sample
train, then flushes the system with distilled
water to purge contaminants and deposits
to ensure more accurate test results.