Configuration Options

gv50a mass flow controller with shut-off valve GV50A Mass Flow Controller, Multi-gas, Multi-range, Elastomer-sealed, 50 slm, Shut-off Valve


  • Type
    Mass Flow Controller
  • Full Scale Flow Range
    5-50,000 sccm
  • Control Range
    2-100% of Full Scale
  • Fitting Type
    Compatible with:
    6 mm Swagelok
    8 mm Swagelok
    10 mm Swagelok
    12 mm Swagelok
    0.125 in. Swagelok (for 1000 sccm N2 equivalent or below)
    0.25 in. Swagelok
    0.5 in. Swagelok
    0.375 in. Swagelok
    Swagelok 4 VCO male
    Swagelok 4 VCR male
    Swagelok 8 VCR male
    Swagelok 8 VCO Male
    Swagelok 2 VCR Male (for 1000 sccm N2 equivalent or below)
  • Seal Material
  • Connector
    RS485 (9 pin connector)
    Profibus (1480 Compatible)
    Profibus (1179B Compatible)
    9 pin D connector (Analog 0-5 VDC)
    9 Pin D connector, Tied Grounds (Analog 0-5 VDC)
    15 pin D connector (Analog 0-5 VDC)
    15 pin D connector, Tied Grounds (Analog 0-5 VDC)
    15 pin D connector (Analog 4-20 mA)
  • Maximum Inlet Pressure
    150 psig
  • Normal Operating Pressure Differential
    10-5000 sccm; 10-40 psid, 10000-0000 sccm; 15-40 psid, 30000-50000 sccm; 25-40 psid
  • Proof Pressure
    1000 psig
  • Burst Pressure
    1500 psig
  • Typical Accuracy
    ± 1% of set point for 20 to 100% Full Scale, ± 0.2% of Full Scale for 2 to 20% Full Scale
  • Repeatability
    ± 0.3% of Reading
  • Resolution
    0.1% of Full Scale
  • Zero Temperature Coefficient
    < 0.05% of Full Scale/°C
  • Span Temperature Coefficient
    < 0.08% of Reading/°C
  • Inlet Pressure Coefficient
    < 0.02% of Reading/psi
  • Typical Settling Time
    <750 msec, typical above 5% Full Scale
  • Warm-up Time
    30 minutes
  • Operating Temperature
  • Storage Humidity
    0-95% Relative Humidity, non-condensing
  • Storage Temperature
    -20° to 80°C
  • External Leak Integrity
    < 1 x 10-09 (scc/sec He)
  • Leak Integrity Through Closed Valve
    Up to 10K valve <0.1% of Full Scale at 40 psig to atmosphere, 20K - 50K valve <1.0% of Full Scale at 40 psig to atmosphere
  • Wetted Materials
    316L S.S. VAR, 316 S.S., Elgiloy®, KM-45
  • Surface Finish
    16µ inch average Ra
  • Weight
    3 lbs (1.4 kg)
  • Compliance


Communication Options/Specifications

Digital I/O DeviceNet™ RS485 Profibus® EtherCAT® PROFINET®
Input Power Required +11 to +25 VDC per (<2 watts) +15 to +24 VDC (<2 watts) +15 to +24 VDC (<2 watts) +24 VDC (<3 watts) +24 VDC (<3 watts)
Connector 5 pin micro connector (power and comm.) 9 pin Type D male (power and comm.) 9 pin Type D male (power)
9 pin Type D female (comm.)
2 x RJ-45 (comm.) male, M8 male,
5 pin (power)
2 x RJ-45 (comm.) male, M8 male,
5 pin (power)
Data Rate Switch/Selection 4 positions: 125, 250, 500K (Default)
(programmable over network)
No switch Set data rate via RS485 No switch Set data rate via Profibus No switch No switch
Comm. Rate(s) 125 Kbps; 250 Kbps; 500 Kbps 9.6 Kbps; 19.2 Kbps 38.4 Kbps 9.6 Kbps to 12 Mbps 100 Mbps 100 Mbps
MAC ID Switches/Addresses 2 switches, 10 positions; 0,0 to 6,3 1 to 254 Set address over RS485 Station Addresses 0,0 to 9,9 2 switches, 10 positions 3 switches, 16 positions N/A
Network Size Up to 64 nodes Up to 32 nodes Up to 99 nodes Up to 4095 nodes N/A
Visual Indicators LED Network (green/red)
LED Module (green/red)
LED Comm (yellow)
LED Error (red)
LED Comm (green/red)
LED Error (green/red)
LED Power (green)
LED Run (green)
LED Error (red)
LED Comm (green)
LED Maint (amber)
LED BUS Fault (red)
LED Ready (green)
LED Sys Fault (red)
Compliance CE CE CE CE CE

Wide Choice of Digital and Analog Interfaces

The GV50A digitally controlled MFC is available with either analog or digital I/O. The digital control electronics utilize the latest in MKS control algorithms providing fast and repeatable response to set point throughout the device control range. Typical response times are on the order of 500 milliseconds. The GV50A’s analog and digital I/O can easily be used to replace those same I/O types of the 2179A MFCs. All GV50As include Modbus as an available secondary I/O (excludes PROFINET® and EtherCAT®).

Standard 3 inch Footprint

The GV50A utilizes the standard 3-inch footprint most often used by MFCs in the 5 sccm to 50 slm flow rate range enabling its use without the need to modify existing gas line configurations.

All Metal Wetted Surfaces

The design of the GV50A incorporates a minimal use of elastomers. There is only one external elastomer seal and elastomer valve plug. Otherwise, all wetted surfaces are of metal. The GV50A comes standard with Viton® seals along with options for Buna, Neoprene®, EPMD or Kalrez® allowing for the device’s use with gases requiring one of these alternatives.

Percent of Setpoint Accuracy

Included digital calibration yields 1% of set point accuracy with N2 calibration gas for 20 to 100% of the full scale flow range.  Set point accuracy enables precise process control vs accuracy stated relative to full scale.  For mass flow rates of 2 to 20% full scale the accuracy is ±0.2% of full scale.

Embedded User Interface

An embedded user interface provides the ability to easily change device range and user gas which reduces inventory requirements. You can also monitor MFC functionality and collect performance data in-situ.

Patented Thermal Sensor

A well proven, patented thermal sensor design provides exceptional zero stability. US Patent No 5461913.

Integral Shut-off Valve

The GV50A incorporates a normally closed, diaphragm type positive shut-off valve. This shut-off valve provides closure to 4x109 scc/sec of Helium.

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