Specification sheet Deltapi N Series Pneumatic Transmitters Model NAA Differential pressure transmitter GENERAL CHARACTERISTICS The blind type differential pressure transmitter, mod. NAA, is used to measure and convert a differential pressure value into a proportional pneumatic signal. The instrument works on the force-balance principle and consists of two main units: the measuring unit which detects the differential pressure variation and consists of two forged bodies and a measuring capsule. The capsule is available in two versions: 2in or 3in diameter diaphragms, filled with a special liquid, which can withstand the maximum rated static pressure on either side without damaging itself. 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, feeds the 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 Special feedback bellows allow to reduce the standard calibration span to a lower value (see table) A zero elevation or 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 for the diaphragm capsule : S + span M (see table). Special versions of air filter regulator and gauges, in stainless steel, are available on request. Air filter regulator can be directly mounted on the transmitter, with or without pressure gauge, and connected with piping and fittings either in stainless steel or copper. Oxygen measurements, special degreasing and final test operations can be required on the oxygen measuring transmitter. Manifold. The transmitter can be supplied with a 3-valve manifold block integrally mounted to simplify maintenance and calibration procedures. SPECIFICATIONS The data were obtained from laboratory tests on standard instruments with: carbon steel or AISI 316L bodies; AISI 316L measuring element with silicone oil filling; gasket: PTFE; calibration span: 18 kPa - 180 mbar (for 3in diaphragm), 70 kPa - 700 mbar (for 2in diaphragm) MEASURING CAPSULE (DIAPHRAGM DIA.) 2 in SPAN LIMITS min. and max. RANGE LIMITS (lower and upper) 30 and 170 kPa -170 and + 170 kPa 300 and 1700 mbar -1700 and +1700 mbar MAXIMUM ZERO SUPPRESSION (S) MAXIMUM ZERO ELEVATION 140 kPa 1400 mbar 170 kPa 1700 mbar 3 in 5 and 52 kPa 50 and 520 mbar -52 and +52 kPa -520 and +520 mbar 47 kPa 470 mbar 52 kPa 520 mbar 3 in with special feedback bellows 2.5 and 7.5 kPa 25 and 75 mbar -52 and +52 kPa -520 and +520 mbar 49.5 kPa 495 mbar 52 kPa 520 mbar STATIC PRESSURE LIMITS Full vacuum and 10 MPa (*) 100 bar (*) (*) Equal to Maximum Working pressure as well as Overrange Limit (on either side). 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) * with 2in diaphragm span 30 to 80 kPa (300 to 800 mbar): 0.5%/10C span 80 to 170 kPa (800 to 1700 mbar): 0.2%/10C * with 3in diaphragm span 5 to 10 kPa (50 to 100 mbar): 0.6%/10C span 10 to 52 kPa (100 to 520 mbar): 0.2%/10C Static pressure effect : for variation of 3.3 MPa (33 bar): 0.25% Maximum displacement - with 2in diaphragm: 1 cm3 - with 3in diaphragm: 1.5 cm3 Degree of protection in accordance with IEC 529 IP55 Ambient temperature limits -40 and + 120C Bodies material Carbon steel, Monel, AISI 316 L, Hastelloy C Body bolts and nuts material High tensile carbon steel; AISI 316 Class A4-70 per ISO 3506; AISI 316 Class A4-50 (*) per ISO 3506, in compliance with NACE MR0175 high tensile stainless steel, in compliance with NACE MR0175 (*) Maximum static pressure reduced to 7.5 MPa (75 bar) Cover material thermoplastic resin Diaphragm material AISI 316 L, Monel (*), Hastelloy C, Tantalum (**) (*) Maximum overrange pressure reduced to 5 MPa (50 bar) (**) Maximum overrange pressure reduced to 1 MPa (10 bar) Gaskets material PTFE, Viton Capsule filling Silicone oil, Perfluorinated polyethers (Galden) (*) (*) When used for oxygen measurements the operating temperature limits are -20C and + 40C. Surface protections - carbon steel body and flange: zinc plating and chrome - passivation AISI 316 body and flange: no protection Process connections (see figure ref. D and E) - on flanges: 1/2 in NPT-F - on adapters: 1/4 in NPT-F - center distance: 54 mm. Pneumatic connections - Air supply (in figure ref. A): 1/4 in NPT-F - Output (in figure ref. B): 1/4 in NPT-F Pressure gauge Brass with stainless steel case (all stainless steel on request) external diameter 51 mm; 0-200 kPa, 0-2 bar and 0-30 psi indication on 82 mm/260 scale. Net weight (maximum) 11 kg approx Air filter regulator with copper or stainless steel piping, as specified. Die cast aluminium alloy with light grey epoxy finish. Packing expanded polythene box ORDERING INFORMATION Select one character or set of characters from each category and specify complete catalog number. PRODUCT CODE abc de fg hi j k lm BASE MODEL VERSION BODY MEASURING ELEMENT GASKETS OUTPUT EXTRAS Code abc BASE MODEL Differential pressure transmitter de NAA VERSION Standard with body bolts and nuts in high tensile carbon steel As 01 with integrally mounted manifold (to be quoted separately) Standard with body bolts and nuts in AISI 316 As 11 with integrally mounted manifold (to be quoted separately) Standard with body bolts and nuts in high tensile stainless steel As 21 with integrally mounted manifold (to be quoted separately) Standard with body bolts and nuts in AISI 316 As 51 with integrally mounted manifold (to be quoted separately) fg Maximum operating pressure reduced to 7.5 MPa (1070 psi) BODY 01 21 41 51 Carbon steel Monel AISI 316L Hastelloy C hi 01 07 11 17 21 27 51 57 MEASURING ELEMENT Diaphragm Core material material AISI 316L AISI 316L (Note 2) AISI 316L AISI 316L (Note 2) AISI 316L AISI 316L (Note 2) Monel Monel (*) Monel Monel (*) Monel Monel (*) AISI 316L AISI 316L (Note 2) AISI 316L AISI 316L (Note 2) AISI 316L AISI 316L (Note 2) Hastelloy C Hastelloy C Hastelloy C Hastelloy C Hastelloy C Hastelloy C Hastelloy C AISI 316L Hastelloy C AISI 316L Hastelloy C AISI 316L Tantalum Hastelloy C (***) Tantalum Hastelloy C (***) Tantalum Hastelloy C (***) Capsule filling Inert fill (**) Inert fill (**) Inert fill (**) Silicone oil Silicone oil Silicone oil Silicone oil Silicone oil Silicone oil Silicone oil Silicone oil Silicone oil Silicone oil Silicone oil Silicone oil Silicone oil Silicone oil Silicone oil Capsule diameter 3 in 2 in 3 in 3 in 2 in 3 in 3 in 2 in 3 in 3 in 2 in 3 in 3 in 2 in 3 in 3 in 2 in 3 in Span limits kPa (inH2O) - (Note 1) 5 and 52 (20 and 208) 30 and 170 (120 and 682) 2.5 and 7.5 (10 and 30) 5 and 52 (20 and 208) 30 and 170 (120 and 682) 2.5 and 7.5 (10 and 30) 5 and 52 (20 and 208) 30 and 170 (120 and 682) 2.5 and 7.5 (10 and 30) 5 and 52 (20 and 208) 30 and 170 (120 and 682) 2.5 and 7.5 (10 and 30) 5 and 52 (20 and 208) 30 and 170 (120 and 682) 2.5 and 7.5 (10 and 30) 5 and 52 (20 and 208) 30 and 170 (120 and 682) 2.5 and 7.5 (10 and 30) 04 05 06 21 22 23 41 42 43 51 52 53 54 55 56 71 72 73 Note 1: Multiply by 10 the value in kPa (MPa) to obtain mbar (bar). Note 2: Hastelloy C for some wetted parts. (*) Maximum overrange 5 MPa (725 psi) (**) Suitable for oxygen service (operating temperature limits reduced: -20C to + 40C; -4F to 104F) (***) Maximum overrange reduced to 1 MPa (145 psi) j GASKETS Flange gasket Viton PTFE (*) (*) Suitable for oxygen service. Capsule gasket Viton PTFE (*) Fulcrum diaphragm gasket Viton PTFE (*) 4 5 k OUTPUT 3 to 15 psi 3 to 15 psi with zero elevation device 3 to 15 psi with zero suppression device 0.2 to 1.0 kg/cm2 0.2 to 1.0 kg/cm2 with zero elevation device 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 elevation device 20 to 100 kPa / 0.2 to 1 bar with zero suppression device lm EXTRAS Identification tag material Stainless Steel Stainless Steel Stainless Steel Stainless Steel Stainless Steel Piping material -Stainless Steel Copper Stainless Steel Copper According to ANSI/ISA S 51.1-1979 standard terminology Air filter regulator -with with with with Pressure gauge ---with with 1 2 3 4 5 6 7 8 9 02 10 11 13 14 Compliance to NACE class II bolting, according to specification MR0175, latest revision SS/NAA Rev 7 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 Ltd. Howard Road St. Neots, Cambs. England PE19 8EU Tel. (01480) 475321 Facsimile (01480) 217948 ABB Inc. 125 East County Line Road Warminster, Pa 18974 USA Tel. (215) 674-6000 Facsimile (215) 674-7183 ABB Instrumentation spa Via Statale, 113 22016 Lenno (CO) Italia Tel. 0344 58111 Facsimile 0344 56278