1.General Introduction
ABB 266AST absolute pressure transmitter is a traditional type for gauge pressure measurement, measure range from 0Kpa to 60Mpa, maximum static pressure is up to 90Mpa and maximum turn down ratio up to 100:1, standard accuracy is 0.04%, maximum accuracy 0.025% is optional, meets SIL2,SIL3 safety applications as per IEC 61508 standard. Accordingly to customer requests, it can be integrated to two 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 | Proof Pressure |
C | 0 | 6Kpa, 60mbar, 24inH2O | 10:1 | 20:1 | 1Mpa, 10bar, 145psi |
F | 0 | 40Kpa, 400mbar, 160inH2O | 10:1 | 20:1 | 1Mpa, 10bar, 145psi |
L | 0 | 250Kpa, 2500mbar, 1000inH2O | 10:1 | 20:1 | 3Mpa, 30bar, 435psi |
D | 0 | 1000Kpa, 10bar, 145psi | 10:1 | 20:1 | 6Mpa, 60bar, 870psi |
U | 0 | 3000Kpa, 30bar, 450psi | 10:1 | 20:1 | 6Mpa, 60bar, 870psi |
R | 0 | 10000Kpa, 100bar, 1450psi | 10:1 | 20:1 | 30Mpa, 300bar, 5945psi |
3.Ambient & Process Temperature Limits
Oil filling & sensor range | Ambient temperature limits | Process temperature limits |
Silicone oil | -40 and 85℃ (-40 and 185℉) | -50 and 121℃ (-58 and 250℉) |
Fluorocarbon (Galden) | -40 and 85℃ (-40 and 185℉) | -40 and 121℃ (-40 and 250℉) |
White oil | -6 and 85℃ (21 and 185℉) | -6 and 121℃ (-40 and 250℉) |
With LCD integral display | -40 and 85℃ (-40 and 185℉) | N/A |
4.Basic Code Selection of 266AST Absolute Pressure Transmitter
Main Code | Suffix Codes | Description | ||||||||
266AST | Gauge pressure transmitter – Base accuracy 0.04 % | |||||||||
SENSOR - Span Limits | C | 0.2 and 6 kPa (2 and 60 mbar, 0.8 and 24 in. H2O) 1 MPa (10 bar, 145 psi) | ||||||||
F | 0.4 and 40 kPa (4 and 400 mbar, 1.6 and 160 in. H2O) 1 MPa (10 bar, 145 psi) | |||||||||
L | 2.5 and 250 kPa (25 and 2500 mbar, 10 and 1000 in. H2O) 3 MPa (30 bar, 435 psi) | |||||||||
D | 10 and 1000 kPa (0.1 and 10 bar, 1.45 and 145 psi) 6 MPa (60 bar, 870 psi) | |||||||||
U | 30 and 3000 kPa (0.3 and 30 bar, 4.35 and 435 psi) 6 MPa (60 bar, 870 psi) | |||||||||
R | 100 and 10000 kPa (1 and 100 bar, 14.5 and 1450 psi) 30 MPa (300 bar, 4350 psi) | |||||||||
Diaphragm Material/ Filling Fluid | S | Stainless steel AISI 316L (1.4435) Silicone oil (Only available with flush diaphragm) NACE | ||||||||
K | Hastelloy® C-276 Silicone oil NACE | |||||||||
A | Stainless steel AISI 316L (1.4435) Fluorocarbon - Galden NACE | |||||||||
F | Hastelloy® C-276 Fluorocarbon - Galden (suited to oxygen applications) NACE | |||||||||
G | Hastelloy® C-276 gold-plated Silicone oil NACE | |||||||||
E | Hastelloy® C-276 gold plated Fluorocarbon - Galden (suited to oxygen applications) | |||||||||
6 | Stainless steel AISI 316L (1.4435) White oil (FDA) (Only available with flush diaphragm) | |||||||||
Z | Hastelloy® C-276 White oil (FDA) NACE | |||||||||
Process Connection Material / Type | B | Stainless steel AISI 316L (1.4404) 1/2-14 NPT internal thread NACE | ||||||||
P | Stainless steel AISI 316L (1.4404) DIN EN 837-1 G 1/2 B NACE | |||||||||
S | Stainless steel AISI 316L (1.4404) DIN EN 837-1 G 1/2 B NACE | |||||||||
T | Stainless steel AISI 316L (1.4404) 1/2-14 NPT male thread NACE | |||||||||
E | Hastelloy® C-276 1/2-14 NPT internal thread NACE | |||||||||
D | Hastelloy® C-276 DIN EN 837-1 G 1/2 B NACE | |||||||||
K | Hastelloy® C-276 1/2-14 NPT male thread NACE | |||||||||
Gasket Material | N | None | ||||||||
Housing Material/ Electrical Connection | A | Aluminium alloy (Barrel type) 1/2-14 NPT | ||||||||
B | Aluminium alloy (Barrel type) M20 x 1.5 | |||||||||
E | Aluminium alloy (Barrel type) Harting Han plug connector | |||||||||
G | Aluminum alloy (Barrel type) / Fieldbus connector (General purpose only) | |||||||||
S | Stainless steel (barrel type) 1/2-14 NPT (I2 or I3 required) | |||||||||
T | Stainless steel (barrel type) M20 x 1.5 (I2 or I3 required) | |||||||||
J | Aluminium alloy (DIN type) M20 x 1.5 | |||||||||
K | Aluminium alloy (DIN type) Harting Han plug connector (General purpose only) | |||||||||
W | Aluminium alloy (DIN type) Fieldbus plug connector (General purpose only) | |||||||||
Z | Stainless steel (barrel type) Fieldbus plug 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 | |||||||||
Explosion Protection Certification | E1 | ATEX Intrinsic Safety Ex ia | ||||||||
E2 | ATEX Explosion Proof Ex db | |||||||||
E3 | ATEX Intrinsic Safety Ex ic | |||||||||
E4 | FM approval (Canada) (Only available with 1/2-14 NPT or M20 electrical connections) | |||||||||
E6 | FM approval (USA) (Only available with 1/2-14 NPT or M20 electrical connections) | |||||||||
EA | FM approvals (USA and Canada) Intrinsic Safety | |||||||||
EB | FM approvals (USA and Canada) Explosion Proof | |||||||||
EC | FM approvals (USA and Canada) Nonincendive | |||||||||
EN | Combined ATEX, IECEx and FM approvals (USA and Canada) | |||||||||
EW | Combined ATEX Ex ia, Ex db and Ex ic | |||||||||
EB | IECEx Intrinsic Safety Ex ia | |||||||||
E9 | IECEx Explosion Proof Ex db | |||||||||
ER | IECEx Intrinsic Safety Ex ic | |||||||||
EH | Combined IEC Approval Ex ia and Ex db | |||||||||
EI | Combined IEC Approval Ex ia, Ex db and Ex ic | |||||||||
EY | NEPSI Intrinsic Safety Ex ia | |||||||||
EZ | NEPSI Explosion Proof Ex d | |||||||||
ES | NEPSI Intrinsic Safety Ex ic | |||||||||
EP | Combined NEPSI Ex ia and Ex d | |||||||||
EQ | Combined NEPSI Ex ia, Ex d and Ex ic | |||||||||
Other Explosion Protection Certifications | W1 | TR CU EAC Ex ia Russia (incl. GOST Metrologic Approval) | ||||||||
W2 | TR CU EAC Ex d Russia (incl. GOST Metrologic Approval) | |||||||||
W3 | TR CU EAC Ex ia Kazakhstan (incl. GOST Metrologic Approval) | |||||||||
W4 | TR CU EAC Ex d Kazakhstan (incl. GOST Metrologic Approval) | |||||||||
WF | TR CU EAC Ex ia Belarus (incl. GOST Metrologic Approval) | |||||||||
WG | TR CU EAC Ex d Belarus (incl. GOST Metrologic Approval) | |||||||||
Integral LCD Display | L1 | With integral LCD display | ||||||||
L5 | With integral touch screen LCD display (TT G) | |||||||||
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 1/2 in. NPT Female Connection 
7.Typical Mounting & Dimensions for M26 2 Way Manifold for 1/2NPTM-1/2NPTF & 1/2NPTF-1/2NPTM
