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 | D | Manifold for DP Style transmitters | |||||||||||||
P | Manifold for P Style transmitters | ||||||||||||||
Revision | A | Revision A | |||||||||||||
Body configuration | S | Standard construction | |||||||||||||
V | For vertical-flange transmitter | ||||||||||||||
Valves | 2 | Two-valve manifold | |||||||||||||
3 | Three-valve manifold | ||||||||||||||
5 | Five-valve manifold | ||||||||||||||
Valve type | V | Standard | |||||||||||||
Material (wetted parts) | S | AISI 316L SS, NACE | |||||||||||||
H | Hastelloy C276, NACE | ||||||||||||||
M | Monel 400 | ||||||||||||||
N | Inconel 625 | ||||||||||||||
Packing material | P | PTFE | |||||||||||||
G | Graphoil | ||||||||||||||
Gasket material (wetted parts) | N | None | |||||||||||||
P | PTFE | ||||||||||||||
G | Graphoil | ||||||||||||||
Manifold process connection (INLET) | F | Threaded 1/2 in. - 14 NPT-female | |||||||||||||
M | Threaded 1/2 in. - 14 NPT-male | ||||||||||||||
Manifold transmitter connection (OUTLET) | 1 | Flanged outlet according to IEC61518/B | |||||||||||||
F | Threaded 1/2 in. - 14 NPT-female | ||||||||||||||
M | Threaded 1/2 in. - 14 NPT-male | ||||||||||||||
Rating | 6 | 413.7 bar (41.37MPa, 6000 psi) | |||||||||||||
1 | 690 bar (69MPa, 10000 psi) | ||||||||||||||
Transmitter fixing bolts | N | None | |||||||||||||
C | Carbon Steel | ||||||||||||||
S | Stainless Steel NACE compliant (MWP=21MPa, 210 bar, 3045 psi) | ||||||||||||||
Bracket kit | N | None | |||||||||||||
C | Carbon Steel | ||||||||||||||
S | Stainless Steel NACE compliant (MWP=21MPa, 210 bar, 3045 psi) | ||||||||||||||
Material traceability | 2 | 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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