ABB Instrumentation
Specification sheet Kent-Taylor Deltapi N Series
Pneumatic Transmitters
Model NEA
Pressure transmitter
The blind type pressure transmitter, mod. NEA, is used to
measure a pressure and convert it into a proportional
pneumatic signal.
The instrument works on the force-balance principle and
consists of two main units:
the measuring unit consists of a Bourdon Tube assembly
housed in a cast iron primary unit enclosure which has an
aluminium gasketed cover. The connection block is welded to
the root of the tube.
The measuring element can withstand the maximum
overrange without damage.
the transmission unit converts the differential force applied to
the measuring element into a proportional output pneumatic
signal.
The output pressure, generated by a flapper nozzle relay, is fed
to a feedback bellows with a rising pressure until the bellows
force balances that of the measuring element.
Span value continuously adjustable by an internal micrometric
screw.
Zero value adjustable by an external screw.
Mounting in a vertical position on 2in diameter pipe by a
special bracket.
OPTIONAL EXTRA FEATURES
A zero suppression device allows to set as a zero of the
transmitter a measured variable value different from zero. The
sum of the zero suppression value (S) plus the calibrated span
cannot exceed the upper range limit (M) suitable by the
Bourdon Tube :
S + span ≤ M (see table).
Air filter regulator can be directly mounted on the transmitter,
with or without output gauge, and connected with piping and
fittings either in stainless steel or copper.
GENERAL CHARACTERISTICS
Ambient temperature limits
-40 and + 120°C
Cover material
thermoplastic resin
Bourdon Tube material
AISI 316
Process connections (see figure ref. D)
1/2 in NPT-M
Pneumatic connections
- Air supply (in figure ref. A): 1/4 in NPT-F
- Output (in figure ref. B): 1/4 in NPT-F
Net weight (maximum)
7 kg approx
Packing
expanded polythene box
Air supply
nom. 140 kPa (1.4 bar, 20 psi); min. 125 kPa (1.25 bar,
18 psi), max. 175 kPa (1.75 bar, 25 psi)
Output signal
20 to 100 kPa/0.2 to 1 bar, 3 to 15 psi or 0.2 to 1 kg/cm2
Static air consumption
350 Nl/h
Maximum output flow
- with rising output pressure: 30 Nl/min.
- with falling output pressure: 40 Nl/min.
Accuracy
± 0.5% F.S.D. (typical)
Thermal drift (for ambient temperature variation between
-20° C and + 65° C)
- range 0 to 7000 kPa (70 bar): ± 1%/10°C
- range 0 to 40000 kPa (400 bar): ± 0.2%/10°C
Degree of protection in accordance with IEC 529
IP55
OVERRANGE
LIMIT
RANGE LIMITS
lower and upper (M)
SPAN LIMITS
min and max MAXIMUM ZERO
SUPPRESSION (S)
7000 and 70000 kPa
70 and 700 bar 0 and 70000 kPa
0 and 700 bar 63000 kPa
630 bar 85 MPa
850 bar
SPECIFICATIONS
01
de VERSION
Standard
fg
Use code 00
hi
01
MEASURING ELEMENT
AISI 316 s.s. Bourdon tube
0
j
Use code
NEA
abc de fg hi j k lm
BASE MODEL
VERSION
MEASURING ELEMENT
OUTPUT
EXTRAS
PRODUCT CODE
abc BASE MODEL
Pressure transmitter
Code
ORDERING INFORMATION
Select one character or set of characters from each category and specify complete catalog number.
Piping
material Air filter
regulator Pressure
gauge
EXTRAS
- -
- -
- -
with
with
- -
with
with
with
with
Identification
tag material
lm s.s.
s.s.
s.s
s.s.
s.s.
- -
s.s.
Copper
s.s.
Copper
02
10
11
13
14
1
3
4
6
7
9
k3 to 15 psi
3 to 15 psi with zero suppression device
0.2 to 1.0 kg/cm2
0.2 to 1.0 kg/cm2 with zero suppression device
20 to 100 kPa / 0.2 to 1 bar
20 to 100 kPa / 0.2 to 1 bar with zero suppression device
OUTPUT
According to
ANSI/ISA S 51.1-1979
standard terminology
00 0
ABB Kent-Taylor spa
Via Statale 113
22016 Lenno (Como)
Italia
Tel. (0344) 58111
Facsimile (0344) 56278
ABB Instrumentation Inc.
1175 John Street
PO Box 20550, Rochester
NY 14602-0550 USA
Tel. (716) 292 6050
Facsimile (716) 273 6207
ABB Kent-Taylor Ltd.
Howard Road
St. Neots, Cambs.
England PE19 3EU
Tel. (01480) 475321,
Facsimile (01480) 217948
The Company's policy is one of continuous product
improvement and the right is reserved to modify the
specifications contained herein without notice.
SS/NEA Rev 5
MOUNTING DIMENSIONS
