Dynatek Labs M6 - Manual (Page 5)

Advanced Design Offers Significant Benefits in Heart Valve Testing
Innovative Test Chamber Design
The M6’s test chambers are machined from a solid block of acrylic.
These test chambers are always custom-made, based on the user’s
heart valve design. Unlike competitive heart valve testers, the M6’s
test chambers do not move; instead, the test fluid moves through
the chamber, just like blood moves through the heart. Advantage:
since there is no reciprocating movement of the chambers, there is no
possibility of leakage of fluid around the test chambers due to leaking
sliding seals.
The M6’s test chambers are sequentially pressurized, which means that
the failure of a heart valve in one chamber does not lead to significant
pressure fluctuations in other test chambers or worse, the shutdown of
the whole unit. The M6 is the only heart valve tester in the world that
utilizes this principle, known as tuned fluid oscillation. This allows the
heart valves to be opened and closed fully while attaining targeted
closing pressures in the most biologically relevant way.
Visualization of Valve Performance
The M6 is an accelerated heart valve durability and fatigue
tester and one of its advantages is the ability for the user to
easily visualize and confirm the movement of the valve being
tested.
ISO 5840 requires visual observation of the test valve at
regular and frequent intervals such as daily or weekly. The
entire upper head, lower head and all test chambers are
made of clear, machined acrylic, allowing you to view both
the top and sides of the test valves conveniently.
All test chambers (and therefore the test valves) are stationary
in the M6, and you can conveniently use a video camera on
a tripod or a stroboscope to easily follow the motion of the
valve.
In competitive testers where the test chamber itself is moving
up and down at high speeds, it is very difficult to visually
follow the test valve’s performance with a stroboscope or a
high-speed camera, preventing the user from obtaining visual
data mandated by ISO.
Customized M6 test section
Negligible Long Term Maintenance Costs
Since the M6 does not use moving test chambers, it does not have
moving parts such as sliding seals, gears, and piston arms, and its
maintenance costs are negligible, compared to competitive units that
have many more parts that are moving. The M6 has a swash-plate that
compresses the bellows under each test chamber, loading every valve
in serial fashion, without the need for sliding seals and gears.
When you’re going to run a 400 million-cycle durability test, you want
to make sure that you have an absolutely reliable machine like the M6
that will not break down in the middle of a test. With the M6 you just
can’t go wrong, since it now comes with a 10-year limited warranty, the
longest such warranty in the industry!