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WORLD PUMPS September 2009Product news 11
www.worldpumps.com
Varna Products has developed
the Daisy pump, a continuous
duty, bi-directional, oil/fuel
transfer pump.
The pump can operate equally
well in either direction, making it
suitable for applications such as
draining and filling engine oil
sumps, and bi-directional fuel
transfer between tanks.
The pump’s oil flow can be
throttled from 9 gpm to zero,
reducing the need for motor
speed controls, the company
says. It comes with a 3-phase
208/230 VAC motor and the Daisy
pump and motor are completely
sealed for wash-down and wet
environments.
There is no shaft seal to wear
out, generate heat or introduce
safety concerns such as fuel or
oil leaks.
www.varnaproducts.com
CA-Kavlico, a global business unit
of Custom Sensors & Technolo-
gies (CST) has developed a new
version of its PT250 pressure
transmitter designed specifically
for installation in heat pump
systems. The 304L stainless
steel transmitter includes a
piezo-resistive sense element and
an integral pipe pressure
connection that is welded at the
pressure source.
According to EU directive
842/2006, heat pump applica-
tions using fluorinated green-
house gases must be checked for
leakage at least once every 12
months or every six months
depending upon the gas quantity
they contain. However, this
directive does not apply to
equipment with hermetically
sealed systems. The PT250 from
Kavlico does not utilize a gasket,
and therefore complies with the
directive. By installing a PT250
transmitter in the heat pump
system, the end user will not
need to monitor leakage rates.
Pressure ranges for the PT250 are
available from 0-6 through 0-400
bar (0-100 through 0-5,000 PSI).
The operating temperature range
is -15° to +85°C, while storage
temperature is -40° to +125°C.
www.kavlico.com
Pressure sensor for heat pumps
Engineer’s drawing of the oil/fuel transfer Daisy pump.
Daisy range operates bi-directionally
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