Variable Area Flow Meters

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Oil and Water Flow Meter | DS1226

Oil and Water Flow Meter- Overview

This spring-loaded variable orifice meter can be mounted in any orientation. Oil or water flow moves the orifice along a scale printed on the borosilicate glass tube, to indicate the flow rate. Independent of viscosity changes up to 200 cs. The meter body is in polyester with standard 1" BSP threads. Used for flow visualisation.

Oil and Water Flow Meter - Features
- Works in any orientation
- Oil and water calibrated
- Pressures up to 10 bar
- Flows 1 to 150 L/min
- Accuracy ±5% FSD
- Repeatability ±1% FSD
- Switches - fully adjustable flow rate signalling
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Metal Tube Purge Flowmeter | Platon DS1210

Metal Tube Purge Flowmeter - Overview

Ideal for liquid or gas flow monitoring on small lines in purging, mixing or sampling systems. It uses a stainless steel tapered tube to create a variable area flowmeter. The magnetically coupled pointer shows flow rate on an external scale. Metal Tube Purge Flowmeters are used where the higher integrity offered by a metal flow tube is important, or where conventional glass flow tubes are not allowed in the process. The meters are available with inline (API) or rear-facing (APT) screwed connections. For fine flow rate adjustment, the APV model has an integral multi-turn needle valve. Scales are individually produced to show the actual fluid flow for the process fluids and conditions relevant. The units are suitable for flush mounting in a control panel, using a simple mounting kit. Standard units require no electrical connection.

Metal Tube Purge Flowmeter - Features
- For high integrity of high-pressure duty
- Standard units require no electrical connection
- Suitable for flush panel mounting
- Scaled for specific process conditions
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Platon Safety Housed GU VA Flow Meter | DS1111

Platon Safety Housed GU VA Flow Meter - Overview

Type GU are glass tube Variable Area Flowmeters for the direct display of liquid or gas flow rate. It has a robust rigid frame which is suitable for mounting directly into plant pipework, protecting the glass tube from pipework stress and random plant damage. The safety Perspex window gives good flow visibility whilst protecting the operator. A safety blowout disc on the rear of the housing provides a relief vent for process fluids, in case of glass tube damage. Glass tube VA flowmeters are simple and reliable in operation, and instantaneous in response. They offer flow visualisation to the operator, and the float rotation confirms correct meter performance. Standard tubes and floats offer low line pressure loss and a high resolution 100mm linear scale, fused into the glass tube. Fluid flows vertically upward through the tapered glass tube which causes the float to rise to an equilibrium position. Flow rate is measured on the scale of the flow tube, along the top edge of the float. The borosilicate glass tubes are individually scaled according to customers' requirements, and individually flow calibrated.

Platon Safety Housed GU VA Flow Meter - Features
- Safety housed for operator protection
- Site interchangeable 140mm flow tubes
- Robust construction
- Instant flow rate visual indication
- Suitable for installation in unsupported pipework
- Flow tube scaled for any gas and most liquids
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All Plastic Variable Area Flowmeter | DS1113

All Plastic Variable Area Flowmeter - Overview

This All Plastic Variable Area Flowmeter construction provides excellent chemical resistance and readability. Supplied complete with end connections, either for solvent welding to PVC pipe/ threaded. Up to three bi-stable alarms can be fitted to each unit or if required, a 4â€“20 mA transmitter is available.

All Plastic Variable Area Flowmeter - Features
- 3-50,000 L/h liquid in 13 ranges each with 10:1 operating span
- 6 different overall lengths from 165-350mm
- Choice of tube materials depending upon operating temperature and pressure up to 100˚C and 10 Bar
- Positive pipe O-ring sealing requiring less tightening effort when installing
- Standard or magnetic floats (where alarms required) of identical mass ensure identical flow ranges when changing
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Screwed Metal Tube VA Flowmeter | Platon DS1221

Screwed Metal Tube VA Flowmeter - Overview

This flowmeter is ideal for industrial use as an alternative to large glass tube flowmeters. Suitable for gas or liquid flow measurement at high pressures and temperatures, where the fluids are opaque or dark-coloured. It also provides high operational security for dangerous or toxic materials. 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 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. 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 approval. All units are calibrated for the specific line conditions or fluid involved.

Screwed Metal Tube VA Flowmeter - Features
- Economic construction
- BSP/NPT Screwed end fitting
- Brass or Stainless Steel
- Wide flow ranges
- Sizes 15, 25, 50mm. 1/2”, 1”, 2” bore
- Integral damping on gas flow lines
- Local indication
- Calibration for wide range of gases and liquids
- Optional electronic outputs
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