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