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Electronic Pressure Switch for Industrial Applications

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The Ashcroft® NPI indicating pressure switch was designed to satisfy challenging applications needing high cycle rates with switch functionality. The Ashcroft® NPA watertight pressure switch was designed to satisfy challenging applications needing high cycle rates with switch functionality

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Electronic Pressure Switch for Industrial Applications

  1. 1. IDEAL FOR PRESSURE ALARM, SHUTDOWN, CONTROL ON – • Machine tools • Injection molding machines • Presses • Pumps • Hydraulic systems • Turbines and compressors • Pipelines • Most process applications • All high-cycle applications N-Series Electronic Pressure Switches Ashcroft® N-Series electronic pressure switches have proven reliable in the tough- est industrial applications. The pressure sensor is a standard Ashcroft K-Series thin film transducer. The signal developed in the transducer is processed on a confor- mal coated printed circuit board to pro- duce an output to a high quality electro- mechanical relay, which is rated for 10,000,000 cycles at rated load! The result is a long lasting pressure switch that will outlast mechanical switches in high cycle applications such as metal stamping presses, plastic injection molding machines, and other machine tool and special equipment. N-Series also features narrow, adjust-able deadbands that can be adjusted to less that 0.5% of range, solv- ing many pipeline and elevated tank appli- cations that are out of the reach of mechanical products. The indicating model is ideally suited for applications where both a pressure indica- tor and a switch output for alarm, shut- down, control or interlock are needed. Sludge and slurry applications in waste- water and pulp and paper mills often require costly diaphragm seals to isolate instruments from the clogging effects of the process.You can save money by installing N-Series with indication on a single seal. You can even set the switch set and reset points on a test bench without pressure on the system, using the indicator and status lights. Look for these additional features. BULLETIN SW15 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USA Tel: 203-378-8281 • Fax: 203-385-0408 email: info@ashcroft.com • www.ashcroft.com All specifications are subject to change without notice. All sales subject to standard terms and conditions. © Ashcroft Inc. 2008 07/14 PERFORMANCE SPECIFICATIONS Ashcroft Model: N-Series Accuracy Class (F.S.): 1.0% Nonlinearity Terminal Point* ±0.7% B.F.S.L. ±0.4% Hysteresis ±0.2% Nonrepeatability ±0.07% Interchangeability ±1.0% *Includes hysteresis Stability: ±0.5% F.S./year non-cumulative Durability: 108 cycles 20/80% F.S. with negligible performance change Response time: Less than 5m sec ENVIRONMENTAL CHARACTERISTICS Temperature Limits: Storage –65/+250°F Operating –20/+180°F Compensated –20/+160°F Thermal Coefficients (70°F ref.): Accuracy Zero and Span 1.0% ±0.040% F.S./°F ELECTRICAL SPECIFICATIONS Output Signal: Supply Voltage: 4-20mA (2 wire) 36 Vdc unregulated Reverse polarity protected. Zero Offset: ±1.0%F.S. MECHANICAL SPECIFICATIONS Standard Construction Materials: Wetted Parts: Diaphragm — 17-4PH SS Pressure Connection —316SS Vmin = 12V+ [.022A*(R L)] *includes a 10% safety factor RL = RS + RW RL = Loop Resistance (ohms) RS = Sense Resistance (ohms) RW = Wire Resistance (ohms) Load Limitations 4-20mA Output Loop Resistance (Ω) 0 10 12 20 30 36 40 1250 1091 1000 750 500 250 0 545 24 OPERATING REGION M.S. Jacobs & Associates Pittsburgh, PA 800-348-0089 www.msjacobs.com
  2. 2. BULLETIN SW15 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USA Tel: 203-378-8281 • Fax: 203-385-0408 email: info@ashcroft.com • www.ashcroft.com All specifications are subject to change without notice. All sales subject to standard terms and conditions. © Ashcroft Inc. 2008 07/14 N-Series Electronic Pressure Switches N-SERIES PRESSURE SWITCH MODEL NUMBER: To specify the exact switch desired select entries from appropriate tables as shown in example below. N P A N 4 L S 0 1 X E A 30 PSI 1 2 4 5 D 3 6 7 1 – FUNCTION NPA – Single setpoint, adjustable deadband NPI – Single setpoint, adjustable deadband, process and setpoint indication 2 – ENCLOSURE N4 – Watertight NEMA 3, 4, 4X, 13 and IP66 N7 – Explosion proof NEMA 3, 4, 4X, 13, 7, 9 and IP66 – Not available with Model NPI (display) 3 – OUTPUT D SPDT Relay 10A, 250 Vac 10A, 30 Vdc I SPDT Relay and 10A, 250 Vac Current Output 10A, 30 Vdc and 4-20mA 5 – PRESSURE PORT Code Description S01 1 ⁄8 NPT Male S02 1 ⁄4 NPT Male S03 1 ⁄8 NPT Female S04 1 ⁄4 NPT Female S05 7 ⁄16-20 SAE-1 ⁄4 SAE S06 1 ⁄2 NPT Male 1 ⁄4 & NPT Female S07 1 ⁄4 AMINCO – Female 4 – POWER REQUIREMENT Code L 110 Vac, 50/60Hz C 24 Vdc V 250 Vac, 50/60Hz 6 – N-SERIES OPTIONS CODE DESCRIPTION XEA External setpoint adjustment Consult factory for other options 7 – NOMINAL RANGE PERFORMANCE TABLE (psi) Nominal Setpoint psi psi Range Limits Proof Burst 60 3-60 120 480 100 5-100 200 800 200 10-200 400 1600 300 15-300 600 2400 500 25-500 1000 4000 750 35-750 1500 6000 1000 50-1000 2000 8000 2000 100-2000 4000 16,000 3000 150-3000 4500 20,000 5000 250-5000 7500 22,500 7500 375-7500 9000 25,000 10,000 500-10,000 12,000 30,000 15,000 750-15,000 18,000 45,000 20,000 1000-20,000 24,000 60,000 NOTE: TEMPERATURE SPECIFICATIONS (70°F ref.) –20°F to 160°F Setpoint shift of up to 2% of range per 50°F change can be expected NEMA 7 (N7) SP INCR CW DB INCR CW 3.62 4.37 INDICATING LEDS TERMINAL BLOCKS GROUND SCREW SETPOINT ADJUSTMENT KNOB DEADBAND ADJUSTMENT KNOB AC AC NC C NO 6.55 3.67 3.96 1.25 3/4 NPT FEMALE NOTE:THIS VIEW SHOWN WITH COVER REMOVED 1/4 NPT MALE PRESSURE CONNECTION (92) (111) (101) (32) (166) (93) NEMA 4 (N4) 3.31 3.26 5.62 INDICATING LEDS NOTE:THIS VIEW SHOWN WITH COVER REMOVED TERMINAL BLOCK GROUND SCREW DEADBAND ADJUSTMENT KNOB SETPOINT ADJUSTMENT KNOB SP INCR CW DB INCR CW AC AC NC C NO 1.26 3.01 3/4 NPT 1/4 NPT MALE PRESSURE CONNECTION (143) (84) (83) (32) (76) Weight 1.8 lb (.81 kg) Weight 2.7 lb (1.2 kg) DIMENSION DRAWINGS

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