100mm SCALE GLASS TUBE & FLOAT
The Platon range of Glass Tube Flowmeters typically uses the 100mm
scale length borosilicate glass tube and a float. Based on the well known
variable area (VA) principle of flow measurement, these flowmeters
provide clear, simple and reliable operation.
FLOWMETERS
Principle of Operation
Fluid flowing vertically upwards through the tapered glass tube
causes the float to rise to an equilibrium position. Flow rate is
measured by reading the top edge of the float against the scaled tube
(see diagram below).
Platon Glass Tubes from RM&C are individually scaled and calibrated
according to customer’s requirements. Custom scales are produced
using our "Reynolds Curve" prediction software, which uses air or
water calibration data corrected for the effects of temperature and
pressure on the density and viscosity of the working fluid.
• Instantaneous response
• Simple and relaible operation
• Low line pressure loss
• High resolution
• Custom scales available on request
Specification
Scale Length
Overall Length
Flow Tube Material
Float Material
Accuracy: 1
Standard Conditions
Suitable Frames
Installation
100mm typically
140mm
Borosilicate Glass with fused ceramic scale
Duraluminium or Stainless Steel for gases; Stainless Steel for liquids
Air: ±1.25% FSD Gases: ±3% FSD Water: ±1.25% FSD
1.013 bar A & 20ºC (ATP)2
NG & G series & GU type
Vertical with flow upward - read top of float
Notes
1
FGTF 1CHD and FGTF 1BHD scales are specially calibrated for very low flow rates with an accuracy of ±2.5%FSD.
2
Atmospheric temperature and pressure is abbreviated to ATP on Platon flowmeters. Custom scales for other
conditions are available. Unless requested, custom scale units will be expressed at ATP.
Product Codes
For standard gas or water ranges, select the required flow range from the table
on page 11. To order, quote the Tube Code, with the Scale Code as a suffix. Unit
scaled tubes, 1 to 10 linear units, are also available as standard. Quote the
required Tube Code with the suffix A.
Example: For a typical Argon flow of 3 L/min, choose the range 0.6 to 4 L/min
and quote the code FGTF 2BHD-J.
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Spare Glass Tube and Floats
Code
FGTF****-*
FGTF3ASS-* (for gases)
Custom scales are supplied at no extra cost
Platon Glass VA Flowmeter Tubes are widely
supplied for use on medical equipment such as
anaesthetic trolleys. Available in keyed lengths
and colour coded to avoid incorrect
installation, standard tubes are calibrated for
oxygen, nitrous oxide or air.
• Instantaneous response
• Reliable operation
• High visibility scale fused into flow tube
surface
• Float rotation gives operator confidence of
FLOWMETERS
ANAESTHETIC GLASS TUBE & FLOAT
correct performance
• Borosilicate glass tube, anti-static coated
to avoid static build up
• Flow ranges from 10:1 to 150:1 available
• Individual flow calibration
• Standard gases - air, oxygen, nitrous oxide
• Customised logo available
Data Sheet DS1170
Specification
Glass Tube
Float
Scale
Tube Diameter
Standard Lengths
Gases
Flow Ranges
Accuracy
Borosilicate Glass
Red Duraluminium
Fused ceramic black ink
O/D 12mm or 15mm nominal
230/240/250/260mm (150mm to special order)
Oxygen, Nitrous Oxide, Air, Helium, Carbon Dioxide, Cyclohexane
0.1 - 1.0 L/min
1.0 - 10 L/min
0.1 - 15 L/min
To specification required
Typical ±2% FSD, ±10% reading or ±2.5mm
How to Specify
•
•
Anaesthetic tubes are made to order
Contact our Technical Sales Team specifying the gas, flow range and tube length required for a specific product
and price quotation
☎
+43 1 706 43 000 email: [email protected]
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