{"title":"Flow - Differential pressure (QB)","description":null,"products":[{"product_id":"qbka-messblende-fur-wirkdruckmessung","title":"QBKA orifice plate flow element","description":"\u003cp\u003eThe \u003cstrong\u003eQBKA\u003c\/strong\u003e is an orifice plate as a primary differential pressure element for liquids, gases and steam from \u003cstrong\u003eDN 50\u003c\/strong\u003e. It is particularly suited to applications where the plate type is matched to medium and pipe and the bore is calculated for the process data of the individual case.\u003c\/p\u003e\u003cp\u003eDifferential pressure principle; the pressure drop is proportional to the square of the flow rate. Standard orifice plate to ISO 5167-2 from DN 50, beta 0.20 … 0.75, accuracy \u003cstrong\u003e≤ ± 0.5 %\u003c\/strong\u003e, repeatability \u003cstrong\u003e0.1 %\u003c\/strong\u003e. Quarter round or tapered plate for liquids at low Reynolds number with ≤ ± 2 %. Eccentric plate to ISO\/TR 15377 above DN 100 with ± 2.0 … 2.5 %, segmental orifice to ISO\/TR 15377 from DN 100 with ± 1 … 2 %. The plate has no supply, no output, no protection grade and no display; a separate differential pressure transmitter provides the signal.\u003c\/p\u003e\u003cp\u003eMaterial stainless steel, alternatively Hastelloy C276, Monel 400 or duplex steel, orifice plate of the ring chamber stainless steel 316\/316L. Nominal pressure to customer requirements. Raised sealing face with 125 … 250 AARH to ASME B16.5, optional ring joint to API 6A, ASME B16.47 Series A or BS 1560, optional vent or drain hole. A declaration of conformity is not documented in the data sheet. Before sizing, note: The header gives the accuracy as a share of actual flow, the table as a share of full range flow. No beta range is given for the quarter round and tapered plate. The design standard of that plate is not stated unambiguously (ASME MFC).\u003c\/p\u003e\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eFour plate types for clean, dirty and viscous media\u003c\/li\u003e\u003cli\u003eFor liquids, gases and steam\u003c\/li\u003e\u003cli\u003eStandard orifice plate to ISO 5167-2\u003c\/li\u003e\u003cli\u003eRepeatability 0.1 %\u003c\/li\u003e\u003cli\u003eBore calculated for the individual case\u003c\/li\u003e\u003cli\u003eMaterials up to Hastelloy C276 and duplex steel\u003c\/li\u003e\u003cli\u003eOptional ring joint gasket for high temperature and pressure\u003c\/li\u003e\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453662601542,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QBKA_produkt.webp?v=1790331840"},{"product_id":"qbkb-wirkdruck-durchflussmesser-mit-analogausgang","title":"QBKB differential pressure flow meter, analogue output","description":"\u003cp\u003eThe \u003cstrong\u003eQBKB\u003c\/strong\u003e is a differential pressure flow meter without moving parts for pipes \u003cstrong\u003eDN 15 … DN 250\u003c\/strong\u003e. It is particularly suited to liquids and to organic and inorganic solutions, steam on request, where a maintenance-free device with analogue signal is required.\u003c\/p\u003e\u003cp\u003eDifferential pressure across a fixed restriction, no field calibration. Flow \u003cstrong\u003e0.4 … 12 500 L\/min\u003c\/strong\u003e depending on the pipe size, repeatability \u003cstrong\u003e\u0026lt; 2 % of the actual flow rate\u003c\/strong\u003e. Accuracy is not documented. Output signal \u003cstrong\u003e4 … 20 mA\u003c\/strong\u003e, \u003cstrong\u003e1 … 5 V\u003c\/strong\u003e or \u003cstrong\u003e0 … 10 V\u003c\/strong\u003e. Supply \u003cstrong\u003e18 … 30 V DC\u003c\/strong\u003e, connection M12 × 1, 4-pin. No display in the standard type; communication output and LED or colour display on request.\u003c\/p\u003e\u003cp\u003eWetted parts stainless steel SUS 304, 316L on request. Threaded flange or flange depending on the nominal size. Pressure range \u003cstrong\u003e0 … 1.0 MPa\u003c\/strong\u003e, pressure rating 1.0 MPa, 1.6 or 2.5 MPa on request. Medium temperature \u003cstrong\u003e-20 … +80 °C\u003c\/strong\u003e in the standard type, high-temperature types up to -40 … +350 °C, ambient -10 … +65 °C. Protection grade and weight are not documented. A declaration of conformity is not documented in the data sheet. Before sizing, note: Accuracy, protection grade, response time and weight have to be requested. The pressure rating is given as 1.0 MPa, while the standard flange is offered as PN16 with 1.6 MPa.\u003c\/p\u003e\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eNo moving parts, maintenance-free\u003c\/li\u003e\u003cli\u003eNo field calibration\u003c\/li\u003e\u003cli\u003eNominal sizes DN 15 … DN 250\u003c\/li\u003e\u003cli\u003eRanges per nominal size in a range table\u003c\/li\u003e\u003cli\u003eAnalogue output 4 … 20 mA, 1 … 5 V or 0 … 10 V\u003c\/li\u003e\u003cli\u003eHigh-temperature types up to +350 °C\u003c\/li\u003e\u003cli\u003eWetted parts stainless steel, 316L on request\u003c\/li\u003e\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453662634310,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QBKB_produkt.webp?v=1790331840"}],"url":"https:\/\/octogon-sensors.com\/en\/collections\/flow-differential-pressure-qb.oembed","provider":"octogon GmbH","version":"1.0","type":"link"}