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Series-GVS
Globe Valve Flow Switches ± 1% Repeatability, Adjustable for Liquids
- Externally adjustable flow set point
- Durable construction delivers long-life reliability in either water or oil
- Ample space for flow to pass keep pressure drop low
Series-GVS
From
C$
821.24
Product Overview
- Accuracy ± 10 %
- Electrical Connection Pigtail Leads
- Filter 150 μ or better
- Mounting Orientation Horizontal Leads wires up
- Operating Temperature, Max 200 °F
- Operating Temperature, Min -20 °F
- Port 1 Size 1 in
- Port 1 Type NPT Female
- Port 2 Size 1 in
- Port 2 Type NPT Female
- Measurement Pressure Type Gauge
- Repeatability ± 1%
- Repeatability Note ± 1% max deviation
- Sensor Material Bronze, TFE, Stainless Steel, Fluoroelastomer, ceramic
- Series ID Series-GVS
- Switch Rating 0.17A@120Vac,0.08A@240Vac,0.13A@120Vdc,0.06A@240Vdc
- Switch Type SPDT NO/NC, Selectable
- Weight 1.16 kg
- Wire Gauge 18 AWG
Supported Applications
The Dwyer Series GVS Globe Valve Flow Switches are designed for installation in piping systems to detect flow conditions of compatible liquids. These switches feature external adjustability over a broad range of flow settings and provide accurate detection with ±10% set point accuracy.
Key application considerations include:
- Detection of liquid media containing particulate or debris, provided the fluid is filtered to 150 microns or better.
- Use in non-hazardous areas; for applications involving ignitable mixtures, combustible dust, or flammable materials, an appropriate explosion-proof enclosure or intrinsically safe interface device is required.
Operating Conditions & Performance
The Series GVS operates within a process temperature range of -20 to 200°F (-29 to 93°C). The pressure rating is specified as 400 psig (27 bar) @ 100°F (38°C), with proof testing conducted at higher limits. Performance characteristics include:
- Repeatability: 1% maximum deviation.
- Hysteresis/Set Point Differential: Not explicitly defined for the GVS series in primary data; related family documentation notes a 15% Maximum differential for similar globe valve switches, but this value is not confirmed for Series GVS specifically.
Ambient temperature changes can affect switch set points due to variations in liquid specific gravity. The units are designed to resist shock and vibration, though these factors should be minimized during operation.
Configuration Options
The series is available with three distinct actuation set point ranges configured by model number:
- GVS-111: 1.0 to 6.0 GPM (3.8 to 22.7 LPM).
- GVS-112: 5.0 to 15.0 GPM (18.9 to 56.8 LPM).
- GVS-113: 2.0 to 8.0 GPM (7.6 to 30.3 LPM).
Standard configuration includes a bronze housing with TFE shuttle, bronze bonnet, and 316 SS spring. Other wetted parts include fluoroelastomer and ceramic materials. The switch output is SPDT with electrical ratings of up to .4 A @ 0-30 VAC/DC or .17 A @ 120 VAC.
Key Product Differences
The Series GVS differs from the related G9 series in mounting orientation and process connection size. The GVS is installed horizontally (or any position, with set points based on horizontal installation), while the G9 series requires vertical installation. Process connections for the GVS are 1" female NPT ports, whereas the G9 utilizes 3/4" NPT.
Material variations exist between the two families: the Series GVS shuttle is constructed of TFE (Teflon®), while the G9 series uses Delrin®. Additionally, operating temperature limits differ slightly; the GVS supports up to +200°F (+93°C) compared to the G9's limit of +180°F (+82.2°C).
PDFs & Manuals
