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182688

Product catalog summary

Overview: The Platon GMTB & GMTS Series are part of the Platon GMT Variable Area flowmeter family, designed for industrial applications. These flowmeters are available in brass or stainless steel with female screwed connections, suitable for high-pressure and high-temperature environments, especially for opaque or dark-colored fluids.

Key Features:

Economic construction with BSP/NPT screwed end fittings.
Available in brass or 316 stainless steel.
Wide flow ranges with sizes of 15, 25, and 50mm (1/2”, 1”, 2” bore).
Integral damping for gas flow lines and local indication.
Calibration available for a wide range of gases and liquids.
Optional electronic outputs including flow alarm and 4-20mA transmitter.

Specifications:

Body Materials: GMTB (Brass), GMTS (316 Stainless Steel).
Float & Guides: 316 Stainless Steel.
Indicator Housing: Aluminium alloy, weather-proofed to IP65.
Connections: BSP or NPT female thread sizes 1/2”, 1”, 2”.
Scale Length: 100mm, 150 degrees.
Turndown: Typically 10:1.
Accuracy: ±2% FSD.
Hysteresis: Less than 0.5%.
Pressure: GMTB up to 75 bar, GMTS up to 100 bar.
Temperature: Max 200°C, Min -50°C.

Installation Notes:

Install vertically with flow direction upwards.
Keep ferromagnetic materials 100mm away from the body and indicator.
Ensure upstream and downstream pipe bores match the instrument size.
Clean and flush pipelines before installation; use filters for particles over 50 microns.
Avoid using solenoid valves directly on the instrument.

Options Available:

Calibration for different fluids or non-standard conditions.
Flow alarm outputs or analogue 4-20mA outputs with CENELEC approval.
Higher pressure or temperature models.
Alternative materials and connections, including hygienic options.
Special models for Oxygen service.

Performance Data: The document provides detailed performance data for various models, indicating maximum water and air flow rates and pressure drops at maximum flow.

Catalog excerpts

FLOW Product Data Sheet Platon Screwed Metal Tube VA Flowmeter PLATON GMTB & S SERIES Part of the Platon GMT Variable Area flowmeter family, models GMTB and GMTS are brass or Stainless Steel tube flowmeters with female screwed connections. With 1/2” 1” and 2” BSP/NPT threaded , fittings standard, the meters are ideal for arduous industrial service as an alternative to large glass tube flowmeters. They have particular advantages for gas or liquid flow measurement at high pressures and temperatures, where the fluids are opaque or dark coloured or to provide higher operational security for dangerous or toxic materials. Economic construction BSP/NPT screwed end fittings Brass or Stainless Steel Wide flow ranges Integral damping on gas flow lines Local indication Calibration for wide range of gases The VA meter principle used in the Platon GMT flowmeter measures the position of a float in a precision-machined tapered tube. The float rises with the flow up the taper until the upthrust from the flow balances with the weight of the float. A magnet, electron beam welded into the float casing, drives the external meter indication over a 100mm scale typically displaying a 10:1 flow range. Optional electronic outputs Options available on the GMTB/GMTS include (GMTA) flow alarm outputs for high or low adjustable set points and electronic 4-20mA flow transmitter (GMTX) outputs. All of these are available with CENELEC intrinsically safe approval. For low-pressure Natural gas flow measurement, models are available with minimal line pressure loss. Special versions are available for Oxygen service. All units are available calibrated for the specific line conditions or fluid involved.

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SPECIFICATION Body Materials GMTB: Brass GMTS: 316 Stainless Steel 316 Stainless Steel Aluminium alloy LM25M polyester coated, weather-proofed to IP65 BSP or NPT female thread sizes 1/2” 1” 2” , , 100mm, 150 degrees. Air or water. Standard scales. Custom scales available to order Typically 10:1 ±2% FSD Less than 0.5% GMTB: 75 bar GMTS: 100 bar 200oC o -50oC (Based on Ambient of 20 C) To smooth out flow fluctuations and noise on gas flows, a dashpot damper is built in. This is suitable for clean gases where particulate matter is less than 50 microns. Std variants available for low pressure drop...

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