AORP Over-range protectors Main Features For corrosive gasses and liquids Protection of instruments from over pressure For pressure gauges, pressure switches and transmitters Option: NACE conform Applications Oil & Gas / Chemical Water & Waste water Energy Machinery Description Technical data These over-range protectors have been designed to protect pressure gauges (or other instruments) against accidential overpressure. The medium must be a clean gas or fluid without particles and with low viscosity. Working principle: The applied pressure works against an adjustable internal spring by means of a bellow or piston. As soon as the pressure reaches the adjusted setpoint, an internal valve closes and avoids further pressure increase on the outlet side. When the pressure decreases, the valve will open 20 % below the closing pressure. Two models are available according to the ranges for the setpoint adjustment (AORP-0, AORP-B, see ordering details on page 2). Inlet: Outlet: Max. pressure: Max. temperature: Setpoint: Setpoint repeatability: 1/2 NPT female 1/2 NPT female 700 bar 150 °C see ordering details on page 2 AORP-0: ± 10 % AORP-B: ± 2 % (when the pressure is increasing over ≥ 5 s) 20 % Stainless steel 1.4404 (316L) Viton Stainless steel 1.4404 (316L) Dead band: (1) Valve: O-ring: Body, adjusting screw and cleaning plug: Piston (AORP-0): Stainless steel 1.4404 (316L) Bellow (AORP-B): Stainless steel 1.4404 (316L) Spring: 1.4310 (301) Gasket of the cleaning plug: Aluminium (1) The valve opens 20 % below the adjusted setpoint for closing. Code SETP Compliant with NACE MR0175 and MR0103 Code 0073 Degreased for oxygen applications Code 0765 Material certificate 3.1 Code Q003 2015-03-03 Customer specific set point adjustment Design and specifications subject to change without notice Options www.baumer.com Data sheet A51.01 Page 1 / 2 AORP Over-range protectors Dimensions (mm) 1/2 NPT L Weight in kg AORP-0 90 0.500 AORP-B 117 0.600 1/2 NPT L Ordering details AORP Type High pressure (piston, ranges 3xx) Low pressure (bellow, ranges 5xx) Pressure range for setpoint adjustment (bar) -1 ... 0 0.1 ... 0.4 0.4 ... 0.6 0.6 ... 1 1 ... 3 3 ... 6 6 ... 16 3 ... 6 6 ... 18 18 ... 25 25 ... 80 80 ... 160 160 ... 400 Options to be added behind the / (see example below) AORP – xxx / – 0 B 507 501 502 503 504 505 506 381 382 383 384 385 386 / Ordering example AORP _ 0385 / 0765 Over-range protector Pressure range: 80 + 160 bar 2015-03-03 Option: Degreased for oxygen applications Design and specifications subject to change without notice AORP Model Over-range protector www.baumer.com Data sheet A51.01 Page 2 / 2