{"title":"Flow - Vortex (QW)","description":"","products":[{"product_id":"qwka-vortex-durchflussmesser-dampf-gas-flussigkeit","title":"QWKA vortex flowmeter, steam, gas and liquid","description":"\u003cp\u003eThe \u003cstrong\u003eQWKA\u003c\/strong\u003e is a vortex flowmeter based on the Kármán vortex street, with no moving part in the meter tube. It is particularly suited to saturated steam, superheated steam, gases and viscous liquids at medium temperatures up to +250 °C, in the high-temperature version up to +350 °C.\u003c\/p\u003e\n\u003cp\u003eVortices shed behind a bluff body, their frequency is proportional to the flow velocity. Flow ranges per nominal size and medium per range table, giving a turndown of about 11:1 to 23:1. Accuracy \u003cstrong\u003e± 1.0 %\u003c\/strong\u003e for all three media, repeatability \u003cstrong\u003e0.3 % (R)\u003c\/strong\u003e, the reference is not explained. Output \u003cstrong\u003ethree-wire voltage pulse\u003c\/strong\u003e (code F) or \u003cstrong\u003etwo-wire 4 … 20 mA with display\u003c\/strong\u003e (code A). Supply \u003cstrong\u003e+24 V DC\u003c\/strong\u003e. Connection \u003cstrong\u003eflange or wafer (clamp) type\u003c\/strong\u003e, nominal sizes \u003cstrong\u003eDN25 … DN300\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eBody of stainless steel. Nominal pressure 1.6, 2.5 and 4.0 MPa per parameter block. Medium temperature -40 … +250 °C, high-temperature version +100 … +350 °C (code H). Counter flanges are not supplied, no flange standard is named. The protection grade is not documented. An explosion-proof version is a digit of the order code; gas group, temperature class and certificate are not named. A declaration of conformity is not documented in the datasheet. Before sizing, note: the size range is given three different ways (DN25 … DN300, DN15 … DN300, range table without DN32). The order code offers 2.5 and 4.0 MPa only, not 1.6 MPa. For steam the range table applies to dry saturated steam only.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKármán vortex street, no moving parts\u003c\/li\u003e\n\u003cli\u003eFor saturated steam, superheated steam, gas and liquid\u003c\/li\u003e\n\u003cli\u003eAccuracy ± 1.0 %, repeatability 0.3 %\u003c\/li\u003e\n\u003cli\u003eMedium temperature up to +250 °C, high-temperature version up to +350 °C\u003c\/li\u003e\n\u003cli\u003eFlange or wafer type\u003c\/li\u003e\n\u003cli\u003eNominal sizes DN25 … DN300\u003c\/li\u003e\n\u003cli\u003eTwo-wire 4 … 20 mA with display or pulse output\u003c\/li\u003e\n\u003cli\u003eTemperature and pressure compensation optional\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453632028998,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QWKA_produkt.webp?v=1790331901"}],"url":"https:\/\/octogon-sensors.com\/en\/collections\/flow-vortex-qw.oembed","provider":"octogon GmbH","version":"1.0","type":"link"}