LINFLO® Control Valves
The Linflo Technologies Division of Hypernetics designs and manufactures laminar flow control valves, which are clearly superior in performance to conventional flow control devices. Hypernetics has considerable experience in the field of laminar flow control valves for both high purity and industrial process control applications. The LINFLO® flow control device provides solutions to a broad range of liquid and gas applications.
The Valve Principle
The LINFLO® valve design achieves high precision, wide rangeability and inherent linearity in one cost effective control device.
The annular inlet plenum distributes the fluid to the radial inflow passage. The accelerating flow field in the inflow passage suppresses cavitation and maintains laminar conditions.
A stainless steel diaphragm provides a flexible wall for the radial inflow chamber. Incremental deflection of the diaphragm results in a linear proportional change in flow. The resulting flow control has exceptional repeatability and negligible hysteresis.
The diaphragm design eliminates stems, bellows and dynamic seals from the flow path to reduce particulate generation, improve drydown cycle times, and enhance resettability and cycle life.
Custom Valve Design
In addition to the LINFLO® valve concept, Hypernetics also offers further expertise in providing custom control valve design capability for unique applications.
Our specialty is custom packaging and redesign for low pressure, low flow, and small size in a wide range of industrial and high purity applications.
If you have a problem that defies an off the shelf solution then Hypernetics may be able to design and build the device you need.
High Purity Valves
Features:
- No dynamic seals
- All metal design
- metal to metal seat
- metal to metal seal
- No elastomers or polymers in the flow stream
- 10 microinch Ra internal finish
- Full internal electropolish for enhanced corrosion resistance, and improved finish
- Inboard helium leak tested to 4x10-9 atm cc/sec
- Bakeable to 120°C
- Inlet pressure-vacuum to 200 PSIG*
- Outlet pressure-vacuum to 200 PSIG*
- Cv from 0.0058 to 1.0*
- Welded fittings standard, 1/4 and1/2 inch sizes
- Wetted materials: Diaphragm - 316 SS, Body - 316L SS
*Dependent on valve series
Applications:
- High purity gas handling
- Control of toxic and specialty gases
- Semiconductor manufacturing
- Research laboratories
- Metering corrosive fluid
- Bakeable control valve in low moisture processes
- Gas flow balancing in chemical vapor deposition equipment
- Soft vent control in vacuum chambers
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Industrial Valves
Features:
- No dynamic seals
- metal to metal seat
- one static seal
- Inlet pressure-vacuum to 200 PSIG*
- Outlet pressure-vacuum to 200 PSIG*
- Cv from 0.0058 to 1.0*
- NPT fittings standard, 1/8 and 1/4 inch
- Wetted materials: Diaphragm - 316 SS, Body - 316L SS O-ring - user specified
- Angle or straight flow pattern
*Dependent on valve series
Applications:
- Flash suppresion and metering volatile fluids
- Low pressure doping and coating systems
- Gas mixing in medical/dental equipment
- Control in printing and painting systems
- Liquid fertilizer metering in agriculture equipment
- Process fluid control in calibration, instrumentation and analytical applications
- Fuel injection and burner controls
- Replacement for elastomer pinch valves in failure sensitive applications
- Replacement for needle valves to prevent actuator packing leaking
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Manual Actuation
- Available in high purity (VM20 and VM42 Series) and
industrial (VM18 and VM40 series)
- Resolution - 1:200
- Hysteresis < 1%
- Linearity > 95%
- Graduated knob for precise, resettable linear flow control
- Locking set screw for fixed flow settings
- Adjustable actuator deadstop protects valve from overtightening
- Packless actuator design eliminates dynamic seals
VM 42 Series:
View Spec Sheet
The LINFLO® VM42 Series all metal high purity control valve provides accurate flow control of gases and liquids and is suitable for toxic and corrosive service in high purity systems.
The patented LINFLO® diaphragm valve design maintains laminar flow conditions in the radial inflow passage and features metal to metal seat and seals. The diaphragm ensures complete isolation of the actuator from the process fluid and eliminates dynamic seals, bellows, stems, sliding parts and polymers from the flowstream.
The simple valve geometry, and 10Ra microinch internal surface finish ensures that entrapment areas and contamination from particle generation and outgassing are minimized.
Each valve is individually cleaned, pressure tested, functionally tested and helium leak checked.
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Pneumatic Actuation
- Available in high purity (VP20 and VP42 Series) and
industrial (VP18 and VP40 series)
- Direct pneumatic actuation (air to close), no positioner required
- Compact and economical
- Ideal for remote actuation where space or temperature are critical
- Operates in open or closed loop systems
- Rangeability 200:1
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Stepper Motor Actuation
- Available in high purity (VS20 and VS42 Series) and
industrial (VS18 and VS40 series)
- Direct digital actuation using 12 VDC stepper motor
- Resolution 1:400
- Rangeability 200:1
- Hysteresis < 1%
- Minimum stroke time (full open to full close) < 1 second
- Operates in open and closed loop systems
- Stepper motor indexer and process variable set point control modules available
- Adjustable step rate and direction capability
- Adjustable shut-off position and deadstop to protect valve against overtightening
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Indirect Pneumatic Actuation
- Air to open, failsafe closed
- Rangeability 200:1
- Several options of signal range available
- Various flow capacities available
- Adjustable seat leakage
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Electromagnetic Actuation
- Flowrate proportional to applied current
- Failsafe open or failsafe closed options
- Available in high purity and industrial versions
- Range of flow capacities available
- Actuator is isolated from process fluid eliminating dynamic seals
- Rangeability 200:1
- Operates in open or closed loop systems
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