(19)

(11)

EP 4 055 278 A1

(12)

(43) Date of publication: 14.09.2022 Bulletin 2022/37 (21) Application number: 20883833.4 (22) Date of filing: 04.11.2020

(51) International Patent Classification (IPC):  F15B 13/02(2006.01) F15B 13/044(2006.01) F15B 13/042(2006.01) (52) Cooperative Patent Classification (CPC): F15B 7/006; F15B 2211/20515; F15B 2211/20561; F15B 2211/27; F15B 2211/20576; F15B 15/1466; F15B 2211/7053; F15B 2211/6651; F15B 2211/8609; F15B 21/047; F15B 21/04; F15B 21/0423; F15B 15/2838; F15B 15/18; F15B 1/26; F15B 2211/20569; F15B 21/14; F15B 2211/6336; F15B 2211/6658 (86) International application number: PCT/FI2020/050726 (87) International publication number: WO 2021/089917 (14.05.2021 Gazette 2021/19)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 04.11.2019 FI 20195943 (71) Applicant: Norrhydro Oy 96300 Rovaniemi (FI)	(72) Inventor: STAMBRO, Peter 96300 Rovaniemi (FI) (74) Representative: Kolster Oy Ab  Salmisaarenaukio 1 P.O. Box 204 00181 Helsinki 00181 Helsinki (FI)