PV256 Low-Power Pinch Valve Instech's - Instech Laboratories, Inc.
PV256 Low-Power Pinch Valve Instech's - Instech Laboratories, Inc.
PV256 Low-Power Pinch Valve Instech's - Instech Laboratories, Inc.
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<strong>PV256</strong> <strong>Low</strong>-<strong>Power</strong> <strong>Pinch</strong> <strong>Valve</strong><br />
Specifications<br />
<strong>Instech</strong>’s dual channel pinch valve uses a motordriven<br />
cam coupled to a position-sensing rotary<br />
switch. This innovative design consumes a fraction<br />
of the power required by traditional solenoid<br />
pinch valves.<br />
Features<br />
Two tubes, three states. A pinched, B pinched or A + B<br />
pinched. Both tubes are never open at the same time.<br />
A A + B B<br />
Voltage<br />
12 V<br />
Average current during transition<br />
32 mA<br />
Inrush current<br />
116 mA peak falling to 30 mA in 20 msec<br />
<strong>Power</strong> during transition<br />
0.4 W<br />
Holding power in any state<br />
0 W<br />
Transition time - side to side<br />
0.6 sec<br />
Transition time - side to both closed 0.3 sec<br />
Control circuitry<br />
External<br />
Pin inputs and outputs 1:Wiper 4: A closed<br />
2: B closed 5: Motor -<br />
3: A+B closed 6: Motor +<br />
Motor type<br />
10 mm rare-earth PMDC<br />
with precision ball-bearing 256:1 gearhead<br />
Motor armature resistance<br />
103 ohms<br />
Motor armature inductance<br />
0.3 mH<br />
Dead volume<br />
0 ml<br />
Tube size required<br />
1/8” OD x 1/16” ID (3.2 x 1.6 mm)<br />
Compatible tube materials<br />
PharMed®, silicone, C-FLEX®,Viton® or Tygon®<br />
with durometer of 70 ShoreA or less<br />
Max pressure<br />
Depends on tube material<br />
(~40 PSI with PharMed)<br />
Mounting<br />
Two 4-40 holes in base<br />
Weight<br />
36 grams<br />
Dimensions<br />
2.26 x 0.70 x 0.56 inches (57 x 18 x 14 mm)<br />
$<br />
For prices see http://www.instechlabs.com/OEM/pinchvalve/<br />
Minimal power consumption.The miniature DC motor consumes<br />
power only when switching from one state to<br />
another. The transition current peak, whichs last a<br />
fraction of a second, is lower than the steady-on current<br />
of solenoid pinch valves (see graph below). The<br />
power-efficiency also leads to much lower heat generation.<br />
<strong>Low</strong> EMI.The valve is driven by a Swiss-made ironlesscore<br />
low-inductance motor which minimizes electromagnetic<br />
radiation.<br />
Small size.The valve weighs only 36 grams.<br />
External control. Position outputs are available for status<br />
checking and control. <strong>Instech</strong>’s engineering department<br />
is available to assist in design integration.<br />
Operating Current Comparison<br />
<strong>Instech</strong> <strong>PV256</strong> (white) vs.Typical <strong>Low</strong>-<strong>Power</strong> Solenoid <strong>Pinch</strong> <strong>Valve</strong> (shaded), mA<br />
200<br />
150<br />
100<br />
50<br />
0 1 2 3 4 5<br />
on<br />
Seconds<br />
off<br />
<strong>Instech</strong> <strong>Laboratories</strong>, <strong>Inc</strong>., 5209 Militia Hill Road, Plymouth Meeting, PA 19462-1216, USA<br />
800-443-4227 • 610-941-0132 • 610-941-0134 fax • www.instechlabs.com<br />
16-Feb-2004 /pv256.qxd
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