Proportional Technology       
VSO – Thermally compensated
The VSO, Voltage Sensitive Orifice, is a miniature solenoid valve that controls the flow of gas in proportion to input current. You can drive the valve with either DC current or pulse width modulation and use closed loop feedback to deliver optimal system performance. Medical and analytical OEMs worldwide choose VSO as their preferred miniature proportional valve.

Features:
  1. Offers operating pressure up to 150 psig and a range of orifice sizes.
  2. Satisfies a 0.2 sccm leakage specification of He for 100 million life cycles and offers high repeatability.
  3. Provides computer-automated calibrations and full calibration traceability.
  4. Uses either DC current or pulse width modulation with closed loop feedback to deliver optimal system performance.
  5. Maintains ideal fl ow through thermal compensation.
  6. ROHS compliant
PERFORMANCE CHARACTERISTICS:
Leak Rate:
<0.2 sccm of helium (bubble tight)
Pressure:
0 to 50 psi (0.34 MPa)
0 to 75 psi (0.52 MPa)
0 to 100 psi (0.69 MPa)
0 to 150 psi (1.03 MPa)

Vacuum:
0-27 in Hg (0.09 MPa)

Orifice Sizes:
0.010" (0.245 mm)
0.020" (0.510 mm)
0.030" (0.762 mm)
0.040" (1.016 mm)
0.050" (1.270 mm)
0.065" (1.651 mm)

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VSO Low Flow – Thermally Compensated
The VSO LF (Low Flow) offers the same benefi ts as the VSO® valve with enhanced fl ow control for applications where control is critical or fl ow is required below 600 sccm. This miniature solenoid-operated valve automates the flow of gas in proportion to the input current.

Features:
Performance Characteristics
Leak Rate: <0.2 sccm of helium
Pressure: 0 - 150 psi (1.03 MPa)
Orifi ce Size: 0.003” (0.076 mm)
Lone Wolf – Thermally Compensated
With its patented technology, the Lone Wolf valve has the highest performance characteristics of any Normally Open proportional valve available on the market. This VSO® valve offers silent operation, provides repeatable high-speed performance, and ensures maximum accuracy.

Features:
  1. Achieves rapid, stable performance.
  2. Enhances system control and patient comfort.
  3. Maintains ideal flow through Normally Open valve with thermal compensation.
  4. Extremely reliable.
  5. ROHS compliant
Performance Characteristics
Leak Rate:
Internal: 0.2 sccm
External: 0.016 sccm
Pressure:
0-10 psi (0.06 MPa)
0-20 psi (0.13 MPa)
0-25 psi (0.17 MPa)
Vacuum:
0-20 in Hg (0.06 MPa)
Orifi ce Sizes:
0.024” (0.609 mm)
0.030” (0.762 mm)
0.036” (0.914 mm)

MD PRO – Non-Thermally compensated
The MD Pro is a miniature solenoid-operated valve that controls gas flow proportionally to input current. This non- thermally compensated VSO® valve is the economical solution for precise flow control.

Features
  1. Provides repeatability across its operating range.
  2. Offers a superior combination of value and performance.
  3. Rated for 10 million life cycles.
  4. ROHS compliant.
Performance Characteristics
Leak Rate:
<0.2 sccm of air
Pressure:
0 to 50 psi (0.34 MPa)
0 to 75 psi (0.52 MPa)
0 to 100 psi (0.69 MPa)
Vacuum:
0-27 in Hg (0.09 MPa)
Orifi ce Sizes:
0.040" (1.02 mm)
0.050" (1.27 mm)
0.065" (1.65 mm)

HF PRO – Non-Thermally Compensated
The HF Pro controls the flow of gas proportionally to input current. The valve may be driven with DC current or Pulse Width Modulation. HF Pro achieves optimal system performance when it uses closed loop feedback.

Features
Performance Characteristics:
Leak Rate:
<0.5 sccm Max. N2
Pressure:
0 to 50 psi (0.34 MPa)
Vacuum:
0-27 in Hg (0.09 MPa)
Orifi ce Sizes:
0.070" (1.8 mm)


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