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V31 Variable Area Flowmeter/Switch (4,000-10,000 L/hr)
Brand: KOBOLD Instruments, Inc
The measuring element is composed of a float and a conical glass tube. A medium flows from the bottom to the top through the measuring ring, lifting the float until the buoyancy force and the weight of the float establish equilibrium.
The height of the float in the measuring ring is the measure of the flow. The flow rate is read directly from a scale inscribed on the glass.
The readings obtained apply solely to the medium for which the device has been calibrated or for a medium with the same density and viscosity.
Specifications
Accuracy
- 1.6 % - Liquids
- 2.5 % - Gases
- qG = 50 %
Ambient Temperature Range
- -20° to 80° C (-4° to 176° F)
Applications
- Dosing
- Flow Metering
- Gas Service
- Liquid Service
- Monitoring
Approvals & Certifications
- ATEX 2 GD IIC TX (BVS 10-ATEX-H/B 119)
- EN 1092
Approvals & Certifications
- Inspection Report
- Works Certificate
BSP Connection
- G 1-1/2” Female
- G 1-1/4” Female
- G 2” Female
Connection Material
- 316Ti Stainless Steel
- PVC
- PVDF
Connection Style
- Glue
Dimensions
- L/hr = 3,000 L/hr to Water
- m³/hour > = 50,000 NL/hr to Air
Electrical Contacts
- Inductive Contact
- Normally Closed & Normally Open
- Reed Contact
Electrical Rating
- 250 Vac / 0.5 A / 10 VA
- 250 Vac/dc / 1.5 A / 150 VA / 100 W
- 250 Vdc / 0.5 A / 5 W
- 5-25 Vdc
Enclosure / Body Material
- 304L Stainless Steel
Environmental Protection
- Weatherproof
Flange Size - 1-1/2” (DN 40)
- 1-1/2” (DN 40) - ASME B16.5 Class 150
- 1-1/2” (DN 40) - PN 10
- 1-1/2” (DN 40) - PN 16
- 1-1/2” (DN 40) - PN 25
- 1-1/2” (DN 40) - PN 40
Flange Size - 2-1/2” (DN 65)
- 2-1/2” (DN 65) - ASME B16.5 Class 150
- 2-1/2” (DN 65) - PN 10
- 2-1/2” (DN 65) - PN 16
Flange Size - 2” (DN 50)
- 2” (DN 50) - ASME B16.5 Class 150
- 2” (DN 50) - PN 10
- 2” (DN 50) - PN 16
Flow Rate
- 400-4,000 to 1,000-10,000 L/hr to Water - Stainless Steel Float
- 5,000-50,000 to 12,500-125,000 NL/hr to Air - PVDF Float
- 6,400-64,000 to 16,000-160,000 NL/hr to Air - Aluminum Float
Gasket Material
- EPDM
- FEP
- FFKM
- FKM
- Perfluor
- Viton
Length
- 14.7” to 19.6” (375 to 500 mm)
Materials of Construction
- 316 Stainless Steel - Float Stop
- 316Ti Stainless Steel - Float, Float Guiding
- Aluminum - Float
- Borosilicate Glass - Measuring Tube
- Polycarbonate - Shatter Protection
- PVDF - Float, Float Stop
Media
- Liquids & Gases
NPT Connection
- 1-1/2” NPT Female
- 1-1/4” NPT Female
- 2” NPT Female
Pressure Range
- psi: 36.26 to 217.6 (kPa: 250 to 1,500, bar: 2.5 to 15)
Process Temperature
- -10° to 150° C (14° to 302° F) - Float Material Stainless Steel / Aluminum
Seat / Seal Material
- EPDM
- FEP
- FFKM
- Viton
Size
- Diameter: 2” (50 mm) - Light Weight Ø 50
- Diameter: 2-1/2” (63 mm) - Adhesive Connection
Storage Temperature
- -10° to 60° C (14° to 140° F)
Switch Type
- SPDT
Turndown
- 1:10
Union Nut Material
- Aluminum
- Stainless Steel
Wetted Materials
- PVDF
- Stainless Steel
