Platon GMT Screwed Metal Tube VA Flowmeter
Can we help?
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.
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 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.
FEATURES
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.
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 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.
FEATURES
- Economic construction
- BSP/NPT screwed end fittings
- 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
Full Product Specification
| Body Materials | GMTB: Brass GMTS: 316 Stainless Steel |
|||
| Float & Float Guides | 316 Stainless Steel | |||
| Indicator Housing | Aluminium alloy LM25M polyester coated, weather-proofed to IP65 | |||
| Connections | BSP or NPT female thread sizes 1/2”, 1”, 2” | |||
| Scale Length | 100mm, 150 degrees. Air or water. Standard scales. Custom scales available to order |
|||
| Turndown | Typically 10:1 | |||
| Accuracy | ±2% FSD | |||
| Hysteresis | Less than 0.5% | |||
| Pressure | GMTB: 75 bar GMTS: 100 bar |
|||
| Temperature | Max | 200°C | (Based on Ambient of 20°C) | |
| Min | -50°C | |||
| Dashpot Damper | 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. |
|||
| Natural Gas | Std variants available for low pressure drop applications, using PVC float assemblies. See catalogue for full details. Specify line pressure and flow range when enquirying. |
|||
| Approvals | CRN (Contact sales for details) | |||
| Flow Range | 0.5-1,000 m³/h (air @ ATP) 1.2-25 m³/h (water @ 20ºC) |
|||
Recommended Products
GMT Alarms and Transmitters
The GMTX (Vampire) is an electronic version of the standard GMT metal tube flowmeter, where the mechanical pointer and scale is replaced with an LCD to give local meter and digital display of flow rates and flow total. The totally solid state indicator is either loop powered, or mains AC powered with a 4-20 mA output. High and low alarms are shown on the LCD panel and can be signalled to the plant control system.
Alarm - GMTA/GMTAA
Sensor
Control Unit
Transmitter - GMTX
Platon FV Automatic Flow Controller
Platon Type FV Flostats automatically regulate the flow of liquids or gases by using available line pressure. Once adjusted to the required value, flow is maintained accurately at this rate independent of supply pressure fluctuations or varying back pressure downstream of the meter. No electrical power or external flow measurement input is required – the Flostat control system uses the available line pressure to control the balanced control valve, maintaining the flow rate at the operator preset value.
Accurate flow control is vital to a wide variety of processes, for example blending and dosing applications. By keeping the required fluid delivery rate constant, a Flostat can ensure consistent product quality irrespective of process liquid head changes throughout a batch.
Flostat Type FV Flow controllers are used in flow control systems such as aircraft fuel delivery systems, to prevent the hazard of excessive flows and protect metering systems from over-speeding. On natural gas or fuel oil delivery systems to multiple burners, Flostat units can maintain optimum flow rate to each burner independently.
Available in sizes from ½" to 4", all Type FV units can be fitted with a flow scale plate calibrated for process conditions.
FEATURES
Platon GMT Flanged Metal Tube VA Gas or Liquid
PLATON METAL TUBE VA FLOWMETER TYPE GMT
GMT metal tube flowmeters are variable area meters of totally welded stainless steel construction. Liquid or Gas flowing up the tapered flowtube lifts the float to an equalibrium position, dependent on flow rate, and a magnetically coupled pointer indicates this flow on an external scale. The large meter indication is easily visible at a distance, with the pointer moving over a 150° scale. Each scale is produced specifically for the fluid involved and process conditions expected: several flow ranges are available for meters of each standard line size. All gas flow meters are supplied with an integral piston damper to smooth out flow pulsations.
Installation is simple, in a vertical section of flow line: meters can be supplied with EN, ANSI or other standard flanges, or BSP or NPT screwed connections.
The robust construction with no glands or seals to leak means the meters are suitable for high pressure applications, or extremes of temperature.The standard GMT is totally self contained and needs no external power.
Alternative materials are available to special order - for example Hastelloy or Monel wetted parts. For lower cost, Brass or Stainless steel bodied meters ½” - 2” in size are available with screwed connections.The indicator can be provided with one or two flow alarm sensors, adjustable over the meter operating range. Full electronic transmission and totalisation is also available, using the VAMPIRE electronic module.
Metal tube meters are ideal for arduous industrial service as an alternative to large glass tube flowmeters. They have particular advantages, where fluids are opaque or staining, or to provide higher safety and security for dangerous or toxic fluids.
FEATURES
UKAS and Traceable Calibration
Roxspur Measurement & Control Ltd is an ISO 9001:2008 company, we offer UKAS and traceable calibration under BS/EN ISO17025 accredited procedures. Our certificate generation systems are purposely geared to meet the strict and specific requirement of the Aerospace industry.
Calibration
Based at our factory in Sheffield our accredited laboratories are available to provide either on-site or in-house calibration to either UKAS or national standards. We cover Temperature (up to 2,200ºC), Pressure (up to 1,200 bar), Flow (up to 2,500 L/min) and Electrical parameters and provide certification using the latest technology.
Our team of experienced on-site engineers hold accreditation for the on-site calibration of equipment including autoclaves, furnaces, thermocouples and probes, scales and balances, ovens and chambers, indicators and controllers, pressure and electrical. We cover the full spectrum of industry sectors. All calibration standards used meet the requirements of Table 3 of AMS 2750D, whether in the laboratory or on site, ensuring full compliance with the specification. To find out more about our on-site services please click here.
We supply thermocouples calibrated and certified to meet the requirements of Table 1 of AMS 2750D appropriate to customer specified usage.
Aerospace Heat Treatment Specialists
From the supply of a single thermocouple to fully managed service contracts, by working in partnership with our customers we can assist in obtaining and maintaining NADCAP approval. To find out more about our specialist aerospace services please click here.
Certification
Certificates generated are designed to meet the requirements of AMS 2750D with the option of UKAS certificates for added peace of mind.
GMT Alarms and Transmitters
The GMTX (Vampire) is an electronic version of the standard GMT metal tube flowmeter, where the mechanical pointer and scale is replaced with an LCD to give local meter and digital display of flow rates and flow total. The totally solid state indicator is either loop powered, or mains AC powered with a 4-20 mA output. High and low alarms are shown on the LCD panel and can be signalled to the plant control system.Alarm - GMTA/GMTAA
Sensor
| Type coding | DIN 19 234 (NAMUR) |
| Type number | SJ2-N |
| Approval | EExia IICT6 |
| IP rating | IP67 |
| Connection | 2m screened cable (2 cores) |
Control Unit
| Power supply | 115v or 230V AC or 24V DC models |
| Output | SPCO Relay 2 Amp at 250V or 40V DC Selectable energised/de-energised for alarm |
| Environment | IP20, from -20ºC to 60ºC |
| Indicators | Green LED: power on Red LED: sensor lead broken Yellow LED: relay energized |
| Approval | (EExia) |
| Size | 115 x 118 x 20 mm |
| Mounting | 35 mm DIN rail or screw fixing |
Transmitter - GMTX
| Flow ranges | Functions with any GMT flow tube flanged or screwed |
| Display | Liquid crystal panel |
| Analogue scale | 10-100%, 90 mm long |
| Digital display | 4½" digital display, 10 mm high, in flow units, selectable for flow rate or total |
| Flow alarms | High and low flow alarm |
| Accuracy | ±1% flow rig calibrated |
| Housing | IP65 Polyester coatedaluminium |
| Approval | EExia IIBT4 |
Platon FV Automatic Flow Controller
Platon Type FV Flostats automatically regulate the flow of liquids or gases by using available line pressure. Once adjusted to the required value, flow is maintained accurately at this rate independent of supply pressure fluctuations or varying back pressure downstream of the meter. No electrical power or external flow measurement input is required – the Flostat control system uses the available line pressure to control the balanced control valve, maintaining the flow rate at the operator preset value.Accurate flow control is vital to a wide variety of processes, for example blending and dosing applications. By keeping the required fluid delivery rate constant, a Flostat can ensure consistent product quality irrespective of process liquid head changes throughout a batch.
Flostat Type FV Flow controllers are used in flow control systems such as aircraft fuel delivery systems, to prevent the hazard of excessive flows and protect metering systems from over-speeding. On natural gas or fuel oil delivery systems to multiple burners, Flostat units can maintain optimum flow rate to each burner independently.
Available in sizes from ½" to 4", all Type FV units can be fitted with a flow scale plate calibrated for process conditions.
FEATURES
- Fully automatic flow control
- No power required
- 1/2" – 4" line sizes
- 10:1 control range
- Fast response
- Suitable for hazardous liquids or gases
Platon GMT Flanged Metal Tube VA Gas or Liquid
PLATON METAL TUBE VA FLOWMETER TYPE GMTGMT metal tube flowmeters are variable area meters of totally welded stainless steel construction. Liquid or Gas flowing up the tapered flowtube lifts the float to an equalibrium position, dependent on flow rate, and a magnetically coupled pointer indicates this flow on an external scale. The large meter indication is easily visible at a distance, with the pointer moving over a 150° scale. Each scale is produced specifically for the fluid involved and process conditions expected: several flow ranges are available for meters of each standard line size. All gas flow meters are supplied with an integral piston damper to smooth out flow pulsations.
Installation is simple, in a vertical section of flow line: meters can be supplied with EN, ANSI or other standard flanges, or BSP or NPT screwed connections.
The robust construction with no glands or seals to leak means the meters are suitable for high pressure applications, or extremes of temperature.The standard GMT is totally self contained and needs no external power.
Alternative materials are available to special order - for example Hastelloy or Monel wetted parts. For lower cost, Brass or Stainless steel bodied meters ½” - 2” in size are available with screwed connections.The indicator can be provided with one or two flow alarm sensors, adjustable over the meter operating range. Full electronic transmission and totalisation is also available, using the VAMPIRE electronic module.
Metal tube meters are ideal for arduous industrial service as an alternative to large glass tube flowmeters. They have particular advantages, where fluids are opaque or staining, or to provide higher safety and security for dangerous or toxic fluids.
FEATURES
- ½” - 4” line sizes
- No power required
- Clearly visible meter
- Scaled for process fluids
- Easy installation - flanged or screwed
- No glands or seals
- Robust, simple construction
- Pulsation damper on gas meter
UKAS and Traceable Calibration
Roxspur Measurement & Control Ltd is an ISO 9001:2008 company, we offer UKAS and traceable calibration under BS/EN ISO17025 accredited procedures. Our certificate generation systems are purposely geared to meet the strict and specific requirement of the Aerospace industry.Calibration
Based at our factory in Sheffield our accredited laboratories are available to provide either on-site or in-house calibration to either UKAS or national standards. We cover Temperature (up to 2,200ºC), Pressure (up to 1,200 bar), Flow (up to 2,500 L/min) and Electrical parameters and provide certification using the latest technology.
Our team of experienced on-site engineers hold accreditation for the on-site calibration of equipment including autoclaves, furnaces, thermocouples and probes, scales and balances, ovens and chambers, indicators and controllers, pressure and electrical. We cover the full spectrum of industry sectors. All calibration standards used meet the requirements of Table 3 of AMS 2750D, whether in the laboratory or on site, ensuring full compliance with the specification. To find out more about our on-site services please click here.
We supply thermocouples calibrated and certified to meet the requirements of Table 1 of AMS 2750D appropriate to customer specified usage.
Aerospace Heat Treatment Specialists
From the supply of a single thermocouple to fully managed service contracts, by working in partnership with our customers we can assist in obtaining and maintaining NADCAP approval. To find out more about our specialist aerospace services please click here.
Certification
Certificates generated are designed to meet the requirements of AMS 2750D with the option of UKAS certificates for added peace of mind.
