Turbine Gas Meter Series FMT-S 

• Turbine Gas Meter

  FMT-S

  TECHNICAL CHARACTERISTICS

  Metrological approvals:	compliant with the MID T10466 – 2014/22/EU compliant with OIML R137 / EN 12480
  ATEX approvals:	sensors compliant with Ex ia IIC T4… T6 Gb (-40°C ≤ Ta +70°C) encoders compliant with EX ib IIB T3… T6 Gb (-25°C ≤ Ta +55°C)
  Nominal diameters:	from DN 80 to DN 800 mm (2″ to 24″)
  Pressure rates:	PN 10 – 100, ANSI 150 – 600
  Flow Rates:	8 up to 2500 m³/h
  Max. working pressure:	up to 100 bar depending on the body material and flanging
  Temperature Range:	ATEX: -25°C to 70°C MID: -25°C to 70°C (lower temperatures on request) PED: -20°C to +70°C (lower temperatures on request)
  Materials:
  Body (Standard):	low weight aluminium / steel
  Body (Optional):	low temperature steel
  Straightening vane:	aluminium
  Turbine wheel:	aluminium
  Cartridge:	aluminium
  Bearing block:	stainless steel / aluminium
  Bearings:	stainless steel
  Shafts:	stainless steel
  Gears:	Delrin
  Index frame:	Aluminium
  Index frame:	polycarbonate ECI

  Mounting position horizontally or vertically
  Body compliant with the Pressure Equipment Directive 97/23/EC Short length
  Removable meter cartridge
  1 x DN straight inlet section required
  Oil flushing and lubrication system
  Multipurpose exchangeable index
  Tamper proof IP67 sealed index

  INTRODUCTION

  The FMT-S turbine meters are robust and designed to perform on the highest level of accuracy. Unique for these meters is the fact they comply with all international standards and are approved for custody transfer even with smallest possible installation length. The actual flow sensor, an exchangeable cartridge, has a build-in multi stage flow conditioner enabling the meter to be installed with limited (1 x DN) straight in- and outlet sections. All tested and proved according perturbation test as per international standards. The cartridge can be pre-calibrated, under both low and high pressure conditions, then exchanged on-site. The cartridge is supported in O-rings and isolated from the body, hence unaffected by any influences of the housing. To reduce transportation cost, optimize the corrosion protection and improve safety in handling, the FMT-S series of turbine meters are also available with low weight aluminium meter bodies. As an example, the weight of a 12” (DN300) ANSI300 FMT-S is less than 45 kg..

  APPLICATIONS

  The unique FMT-S turbine meter is suitable for custody transfer gas measure- ment of all non-corrosive gases such as natural gas, propane, butane, air, nitrogen, hydrogen, etc. for low and high operating pressures. Special constructions can be supplied for use under extreme conditions like high temperatures or corrosive gases. Standard FMT-S bodies up to 8” (DN 200 mm.) ANSI150 or PN10/PN16 come with threaded flanges. Larger Sizes or higher pressure ratings up to 24” ANSI600 are available in steel. The FMT-S has a length of just 1 x DN. For flange ratings up to ANSI300 and PN40, the body is available in aluminium (steel on request). Due to the extremely low weight of these aluminium bodies, the meter can be transported easily and exchanged without special equipment.

  ACCURACY

  Each FMT-S turbine gas meter is tested with atmospheric air to traceable calibrated references. The error limits are typical half of those allowed by MID, EN standards or OIML recommendations. For pressures of above 8 bar even narrower limits are available. Optionally, meters can be calibrated with natural gas at pressures up to 100 bar, using test installations traceable to primary standards.

  TYPICAL METROLOGICAL CHARACTERISTICS

  Accuracy 0,2 Qmax to Qmax:	± 1% or better
  Accuracy Qmin to 0,2 Qmax:	± 2% or better
  Repeatability:	better than 0,1%

  MEASURING RANGE

  The measuring range of the FMT-S turbine meter is determined under atmospheric conditions and meets with, and generally exceeds, the international standards. At higher operating pressures the measuring range of the turbine meters will increase since the required kinetic energy transfer to the turbine rotor occurs at lower velocities. The following equation may be used to estimate the minimum flow rate of the meter for various operating conditions.

  PRESSURE LOSS

  The average pressure loss (see tables page 6) of the FMT-S turbine meter is measured with atmospheric natural gas with a relative density of 0.6 at one (1) diameter upstream to one (1) diameter downstream of the meter on straight pipe of the same size as the meter. The pressure loss across the FMT-S turbine meter for various gases and other operating pressures may be approximated from the following equation.

  INSTALLATION

  The FMT-S fulfills all the requirements of the European and International directives. In particular those of the OIML, ISO and EN. With the special in- tegrated flow straightener, the FMT-S turbine meter eliminates the effect of severe perturbations with an straight inlet and outlet piping of 1 X DN. This permits the design of very compact installations without losing accuracy.

  INDEX

  The basic index consists of an UV-resistant polycarbonate cover, glued (IP67) to an aluminium frame. The aluminium frame will give strength to the index and as such sufficient protection against mechanical interference (Tampering). The index can be rotated over 3500 for all directions. The index can be equipped with multiple LF switches (Reed or Wiegand principle), “Normally Closed” tamper contacts and encoder technology. The LF pulsers and its driving magnet are shielded to overcome tampering with an ex- ternally applied magnetic field. Magnetic fields up to 500 mT will not have an effect on the pulse counting. The index can be equipped with several options making the meter prepared for the future.

  DOUBLE REED PLUS NORMALLY CLOSED CONTACT:

  all basic indexes are equipped with an double reed and a normally closed contact. Reverse Flow Lock: In order to avoid tampering by reverse flow, the index or instrument drive can be equipped with a Reverse Flow Lock.

  WIEGAND PULSERS:

  The Index can be equipped with multiple Wiegand pulsers. The Wiegand pulsers do have significant advantages over the traditionally used Reed contacts. Wiegand sensors do not face “bouncing” problems and the actual live time is not limited as much as the traditional Reed contacts.

  INTELLIGENT INDEX/ENCODER:

  The index can be equipped with an intelligent encoder. The encoder sends out the total volume with an interval of 400 msec. The encoder uses a standard NAMUR serial data format, and can be modified to special applica- tions on request. The encoder is powered by one AA cell battery guaran- teed for 12 years of operation. On request two AA cells can be installed for a guaranteed life time of 20 years. The encoder is equipped with a special Hall sensor to detect and register interferences from external magnets. Several programmable inputs/outputs are available for advanced – anti fraud – functions.

  LUBRICATION

  The FMT-S series incorporates high quality precision bearings. For optimal performance and long life time, it is recommended that the bearings are flushed and lubricated on a regular base. FMT series of turbine meters can be equipped with several types of lubrication systems or with life time lubrication. FMG recommends to use the lubrication systems. In case of a lubrication system, an integrated splash vane will distribute the oil to all the moving parts and will flush the bearings. Recommendations as to when

  to lubricate turbine meters varies by product type, operating conditions, customer procedures, and regulatory requirements. Meter performance is optimized by flushing contamination from the bearings and refreshing or adding of oil during operation.

  HEAVY DUTY BEARINGS

  Since the forces on the main bearings are directly related to the density (operating pressure) of the gas, the FMT-S series incorporates bearings dedicated to the working pressure. FMT-S(w) turbine meters which have a low working pressure are equipped with lighter bearings then the meters which are used at higher working pressures. This way, the best measuring ranges and life times can be guaranteed.

  HIGH FREQUENCY SENSORS

  FMT-S Turbine meters can be equipped with several types of high frequency sensors.

  HF MAIN SHAFT:

  this high frequency sensor generates two independent phase shifted sig- nals and as such the flow direction can be monitored. The signal generated complies with Namur.

  HF TURBINE WHEEL:

  this HF sensor can be used to check the condition of the turbine wheel (miss- ing blades) by comparing the pulses with the HF main shaft.

  For both sensors, the electrical separation between the hazardous and non- hazardous areas is accomplished by an intrinsically safe isolation amplifier

  TECHNICAL DATA

  Flange Type										Dimensions				Weight (kg)
  Size	G-value	Q-max		Q-min		dp (NG)*	NF	HF	HF					ALU	Steel	Steel	Steel
  (mm)	(-)	(m³/h)	atmospheric air	4bar NG	8 bar NG			Main**	Wheel**	C	E	H	L***	(kg)	(kg)	(kg)	(kg)
  			(m³/h)	(m³/h)	(m³/h)	(Pa)	(imp/m³)	(imp/m³)	(imp/m³)	(mm)	(mm)	(mm)	(mm)	< 21bar	< 21 bar	< 51 bar	< 101 bar
  50	G100	160	8	5	3	900	1	22560	67675	155		175	150	8	17	17	17
  	G160	250	13	8	5	900	1	8235	28815	155		175	150	8	17	17	17
  	G250	400	20	13	8	900	1	5180	20705	155		175	150	8	17	17	17
  80	G100	160	8	5	3	900	1	1845	64540	175	95	175	120	8	27	27	27
  	G160	250	13	8	5	900	1	22650	67675	175	95	175	120	8	27	27	27
  	G250	400	20	13	8	900	1	8235	28815	175	95	175	120	8	27	27	27
  100	G160	250	13	8	5	900	1	8025	24065	192	112	185	150	11	47	47	55
  	G250	400	20	13	8	900	1	3915	13700	192	112	185	150	11	47	47	55
  	G400	650	32	20	13	900	1	2340	9350	192	112	185	150	11	47	47	55
  150	G400	650	32	20	13	900	1	4475	6715	212	138	212	175/180	19	79	79	102
  	G650	1000	50	32	20	900	1	2950	5165	212	138	212	175/180	19	79	79	102
  	G1000	1600	80	50	32	1600	0.1	1435	2865	212	138	212	175/180	19	79	79	102
  200	G650	1000	50	32	20	900	1	2950	5165	243	168	238	200	26	86	112	152
  	G1000	1600	80	50	32	900	0.1	1435	2865	243	168	238	200	26	86	112	152
  	G1600	2500	125	80	50	1600	0.1	885	1770	243	168	238	200	26	86	112	152
  250	G1000	1600	50	32		900	0.1	775	2320	236		282	250/375	–	124	162	244
  	G1600	2500	80	50		900	0.1	440	1310	236		282	250/375	–	124	162	244
  	G2500	4000	130	80		900	0.1	440	1310	236		282	250/375	–	124	162	244
  300	G1600	2500	80	50		900	0.1	440	1320	236		283	300/450	–	175	225	303
  	G2500	4000	130	80		900	0.1	245	740	236		283	300/450	–	175	225	303
  	G4000	6500	200	130		900	0.1	245	740	236		283	300/450	–	175	225	303
  400	G2500	4000	130	80		900	0.1	220	655	295		328	400/600	–	292	384	530
  	G4000	6500	200	130		900	0.1	125	370	295		328	400/600	–	292	384	530
  	G6500	10000	320	200		1600	0.1	125	370	295		328	400/600	–	292	384	530
  500	G4000	6500	200	130		900	0.1	95	285	375		380	500/750	–	342	492	704
  	G6500	10000	320	200		900	0.1	54	162	375		380	500/750	–	342	492	704
  	G10000	16000	500	320		1600	0.01	54	162	375		380	500/750	–	342	492	704
  600	G6500	10000	320	200		900	0.1	28	84	425		430	600/900	–	511	749	1009
  	G10000	16000	500	320		900	0.01	28	84	425		430	600/900	–	511	749	1009
  	G16000	25000	800	500		1600	0.01	28	84	425		430	600/900	–	511	749	1009

  * dP, is measured under atmospheric conditions with natural gas with relative density of 0.6 (air=1)
  ** Values may vary 5% due to machining tolerances
  *** Different lengths on request

  Values can vary by up to 5% due to fabrication tolerances

  Wafer type		Dimensions				Weight (kg)
  Size	G-value	C	E	H	L***	ALU	Steel
  (mm)	(-)	(mm)	(mm)	(mm)	(mm)	(kg)	(kg)
  50	G100	155		175	150	8	17
  	G160	155		175	150	8	17
  	G250	155		175	150	8	17
  80	G100	175	95	175	120	7	27
  	G160	175	95	175	120	7	27
  	G250	175	95	175	120	7	27
  100	G160	192	112	185	150	8	55
  	G250	192	112	185	150	8	55
  	G400	192	112	185	150	8	55
  150	G400	212	138	212	175/180	12	102
  	G650	212	138	212	175/180	12	102
  	G1000	212	138	212	175/180	12	102
  200	G650	243	168	238	200	15	152
  	G1000	243	168	238	200	15	152
  	G1600	243	168	238	200	15	152
  250	G1000	236		282	250	43	244
  	G1600	236		282	250	43	244
  	G2500	236		282	250	43	244
  300	G1600	236		283	300	51	303
  	G2500	236		283	300	51	303
  	G4000	236		283	300	51	303
  400	G2500	295		328	400	93	530
  	G4000	295		328	400	93	530
  	G6500	295		328	400	93	530
  500	G4000	375		380	500	133	704
  	G6500	375		380	500	133	704
  	G10000	375		380	500	133	704
  600	G6500	425		430	600	176	1009
  	G10000	425		430	600	176	1009
  	G16000	425		430	600	176	1009

  
  Request your offer or more information now Download as PDF