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ABB 266MST Differential Pressure Transmitter

1.General Introduction

ABB 266MST differential pressure transmitter is a traditional type for differential pressure measurement, measure range from -10Mpa to 10Mpa, maximum static pressure is up to 60Mpa and maximum turn down ratio up to 100:1, standard accuracy is 0.04%, meets SIL2,SIL3 safety applications as per IEC 61508 standard. Accordingly to customer requests, it can either be integrated to five way or three way M26 manifold, or remote connection to manifold via impulse line.

2.Measuring Span & Range Limits

Sensor Code	Lower Range Limit (LRL)	Upper Range Limit (URL)	Standard TD Ratio	Max. TD Ratio	Standard Static Pressure
A	-1Kpa, -10mbar, -4inH2O	1Kpa, 10mbar, 4inH2O	10:1	20:1	2Mpa, 20bar, 290psi
C	-6Kpa, -60mbar, -24inH2O	6Kpa, 60mbar, 24inH2O	10:1	30:1	60Mpa, 600bar, 8700psi
F	-40Kpa, -400mbar, -160inH2O	40Kpa, 400mbar, 160inH2O	10:1	100:1	60Mpa, 600bar, 8700psi
L	-250Kpa, -2500mbar, -1000inH2O	250Kpa, 2500mbar, 1000inH2O	10:1	100:1	60Mpa, 600bar, 8700psi
N	-2000Kpa, -20bar, -290psi	2000Kpa, 20bar, 290psi	10:1	100:1	60Mpa, 600bar, 8700psi
R	-10000Kpa, -100bar, -1450psi	10000Kpa, 100bar, 1450psi	10:1	100:1	60Mpa, 600bar, 8700psi

3.Ambient & Process Temperature Limits

Oil filling & sensor range	Ambient temperature limits	Process temperature limits
Silicone oil	-40 and 85℃ (-40 and 185℉)	-40 and 121℃ (-40 and 250℉)
Inert (Galden)	-40 and 85℃ (-40 and 185℉)	-40 and 121℃ (-40 and 250℉)
Maximum operating pressure (60 MPa, 600 bar, 8700 psi)	-20 and 70℃ (-4 and 158℉)	-20 and 85℃ (-4 and 185℉)
With LCD integral display	-40 and 85℃ (-40 and 185℉)	N/A
Viton gasket	-20 and 85℃ (-4 and 185℉)	-20 and 121℃ (-4 and 250℉)
PTFE gasket	-20 and 85℃ (-4 and 185℉)	-20 and 85℃ (-4 and 185℉)

4.Basic Code Selection of 266MST Differential Pressure Transmitter

Main Code	Suffix Codes							Description
266MST								Differential pressure transmitter, base accuracy 0.04 %
SENSOR - Span Limits	A							0.05 and 1 kPa (0.5 and 10 mbar, 0.2 and 4 in. H2O), "Vx" option is required
	C							0.2 and 6 kPa (2 and 60 mbar, 0.8 and 24 in. H2O)
	F							0.4 and 40 kPa (4 and 400 mbar, 1.6 and 160 in. H2O)
	L							2.5 and 250 kPa (25 and 2500 mbar, 10 and 1000 in. H2O)
	N							20 and 2000 kPa (0.2 and 20 bar, 2.9 and 290 psi)
	R							100 and 10000 kPa (1 and 100 bar, 14.5 and 1450 psi)
Maximum Working Pressure		Y						1 MPa / 10 bar / 145 psi (Only available with Process Flanges code P)
		W						Differential measurement at high static pressure
		C						Gauge measurement
		Z						25 MPa / 250 bar / 3625 psi (Not available with Sensor Span Limits code A)
		T						41 MPa / 410 bar / 5945 psi (Not available with Sensor Span Limits code A)
		A						60 MPa / 600 bar / 8700 psi (Not available with Sensor Span Limits code A, only with process connection code A)
Diaphragm Material / Fill Fluid			S					AISI 316L SST (1.4435) / Silicone oil (NACE)
			K					Hastelloy C–276 / Silicone oil (NACE)
			M					Monel 400 / Silicone oil (NACE)
			V					Monel 400 gold–plated / Silicone oil (NACE)
			T					Tantalum / Silicone oil (NACE)
			A					AISI 316L SST (1.4435) / Inert fluid – Galden (Suitable for oxygen applications) (NACE)
			F					Hastelloy C–276 / Inert fluid – Galden (Suitable for oxygen applications) (NACE)
			C					Monel 400 / Inert fluid – Galden (Suitable for oxygen applications) (NACE)
			Y					Monel 400 gold–plated / Inert fluid – Galden (Suitable for oxygen applications) (NACE)
			D					Tantalum / Inert fluid – Galden (Suitable for oxygen applications) (NACE)
Process Flanges and Adapters Material/ Connection				A				AISI 316L SST (1.4404 / 1.4408) / 1/4–18 NPT female direct (horizontal connection) (NACE)
				B				AISI 316L SST (1.4404 / 1.4408) / 1/2–14 NPT female through adapter (horizontal connection) (NACE)
				C				AISI 316L SST (1.4404 / 1.4408) / 1/4–18 NPT female direct (DIN 19213) (horizontal connection) (NACE)
				D				Hastelloy C–276 / 1/4–18 NPT female direct (horizontal connection) (NACE)
				E				Hastelloy C–276 / 1/2–14 NPT female through adapter (horizontal connection) (NACE)
				G				Monel 400 / 1/4–18 NPT female direct (horizontal connection) (NACE)
				H				Monel 400 / 1/2–14 NPT female through adapter (horizontal connection) (NACE)
				P				Kynar (PVDF) / 1/4–18 NPT female direct (MWP = 1 MPa) (insert on side of flange)
				Q				AISI 316L SST (1.4404 / 1.4408) / 1/4–18 NPT female direct (vertical connection) (NACE)
Bolts Material/ Gaskets Material					3			AISI 316 SST (NACE – not exposed to H2S) / Viton (Suitable for oxygen applications) (Max. 41 MPa / 410 bar / 5945 psi)
					4			AISI 316 SST (NACE – not exposed to H2S) / PTFE (Max. 25 MPa / 250 bar / 3625 psi)
					5			AISI 316 SST (NACE – not exposed to H2S) / EPDM (Max. 41 MPa / 410 bar / 5945 psi)
					6			AISI 316 SST (NACE – not exposed to H2S) / Perbunan
					7			AISI 316 SST (NACE – not exposed to H2S) / Graphite (Max. 41 MPa / 410 bar / 5945 psi)
					T			AISI 316 SST / FEP (Only available with Kynar [PVDF] process connection)
Housing Material / Electrical Connection						A		Aluminum alloy (Barrel type) / 1/2–14 NPT
						B		Aluminum alloy (Barrel type) / M20 x 1.5
						E		Aluminum alloy (Barrel type) / Harting Han connector (General purpose only)
						G		Aluminum alloy (Barrel type) / Fieldbus connector (General purpose only)
						S		AISI 316L SST (Barrel type) / 1/2–14 NPT (I2 or I3 required)
						T		AISI 316L SST (Barrel type) / M20 x 1.5 (I2 or I3 required)
						J		Aluminum alloy (DIN type) / M20 x 1.5
						K		Aluminum alloy (DIN type) / Harting Han connector (General purpose only)
						W		Aluminum alloy (DIN type) / Fieldbus connector (General purpose only)
						Z		AISI 316L SST (Barrel type) / Fieldbus connector (General purpose only)
Output							1	HART digital communication and 4 to 20 mA
							2	Profibus PA
							3	Foundation fieldbus
							8	HART digital communication and 4 to 20 mA, SIL2 and SIL3 certified to IEC 61508
Optional Codes								/Optional codes

5.Basic Code Selection of M26 Manifolds

Main Code

Suffix Codes

Description

M26

Manifold model for 266 Pressure Transmitters

Design

Manifold for DP Style transmitters

Manifold for P Style transmitters

Revision

Revision A

Body configuration

Standard construction

For vertical-flange transmitter

Valves

Two-valve manifold

Three-valve manifold

Five-valve manifold

Valve type

Standard

Material (wetted parts)

AISI 316L SS, NACE

Hastelloy C276, NACE

Monel 400

Inconel 625

Packing material

PTFE

Graphoil

Gasket material (wetted parts)

None

PTFE

Graphoil

Manifold process connection (INLET)

Threaded 1/2 in. - 14 NPT-female

Threaded 1/2 in. - 14 NPT-male

Manifold transmitter connection (OUTLET)

Flanged outlet according to IEC61518/B

Threaded 1/2 in. - 14 NPT-female

Threaded 1/2 in. - 14 NPT-male

Rating

413.7 bar (41.37MPa, 6000 psi)

690 bar (69MPa, 10000 psi)

Transmitter fixing bolts

None

Carbon Steel

Stainless Steel NACE compliant (MWP=21MPa, 210 bar, 3045 psi)

Bracket kit

None

Carbon Steel

Stainless Steel NACE compliant (MWP=21MPa, 210 bar, 3045 psi)

Material traceability

Inspection certificate EN 10204–3.1 of process wetted parts

Optional codes

/Optional codes

6.Typical Mounting & Dimensions for Barrel Housing Horizontal & Vertical Pipe Mounting

7.Typical Mounting & Dimensions for M26 5 Way Manifold for Horizontal & Vertical Flanges

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ABB 266MST Differential Pressure Transmitter

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