Specification sheet Kent-Taylor Deltapi N Series Pneumatic Transmitters Model NEA Pressure transmitter GENERAL CHARACTERISTICS 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). ABB Instrumentation 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. SPECIFICATIONS SPAN LIMITS min and max RANGE LIMITS lower and upper (M) MAXIMUM ZERO SUPPRESSION (S) OVERRANGE LIMIT 7000 and 70000 kPa 70 and 700 bar 0 and 70000 kPa 0 and 700 bar 63000 kPa 630 bar 85 MPa 850 bar 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%/10C - range 0 to 40000 kPa (400 bar): 0.2%/10C Degree of protection in accordance with IEC 529 IP55 Ambient temperature limits -40 and + 120C 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 ORDERING INFORMATION Select one character or set of characters from each category and specify complete catalog number. PRODUCT CODE abc BASE MODEL VERSION MEASURING ELEMENT OUTPUT EXTRAS de fg 00 hi j k lm 0 Code abc BASE MODEL NEA Pressure transmitter de VERSION Standard 01 Use code 00 fg hi MEASURING ELEMENT AISI 316 s.s. Bourdon tube 01 Use code 0 j k lm OUTPUT 3 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 EXTRAS Identification tag material s.s. s.s. s.s s.s. s.s. Piping material -s.s. Copper s.s. Copper According to ANSI/ISA S 51.1-1979 standard terminology Air filter regulator -with with with with Pressure gauge ---with with 1 3 4 6 7 9 02 10 11 13 14 SS/NEA Rev 5 MOUNTING DIMENSIONS The Company's policy is one of continuous product improvement and the right is reserved to modify the specifications contained herein without notice. ABB Kent-Taylor spa Via Statale 113 22016 Lenno (Como) Italia Tel. (0344) 58111 Facsimile (0344) 56278 ABB Kent-Taylor Ltd. Howard Road St. Neots, Cambs. England PE19 3EU Tel. (01480) 475321, Facsimile (01480) 217948 ABB Instrumentation Inc. 1175 John Street PO Box 20550, Rochester NY 14602-0550 USA Tel. (716) 292 6050 Facsimile (716) 273 6207