(19)

(11)

EP 0 726 815 A1

(12)

(43) Date of publication: 21.08.1996 Bulletin 1996/34 (21) Application number: 93910539.0 (22) Date of filing: 18.05.1993

(51) International Patent Classification (IPC):  B06B 1/ 16( . ) B07B 1/ 42( . ) (86) International application number: PCT/SE1993/000437 (87) International publication number: WO 1993/023179 (25.11.1993 Gazette 1993/28)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI NL PT SE (30) Priority: 19.05.1992 GB 19920010624 (71) Applicant: ALFA-LAVAL SEPARATION AB S-147 80 Tumba (SE)	(72) Inventors: BJÖRKLUND, Ola Alfa Laval Oilfield Ltd. Brentford Middlesex TW8 9BT (GB) RITCHIE, Alexander 3 Kinmonth Road Kincardineshire AB3 2YF (GB) SOUTER, George Nostro Casa Peterculter Aberdeen AB1 2NN (GB) (74) Representative: Stokes, Graeme Wilson, et al  c/o Cruikshank & Fairweather 19 Royal Exchange Square Glasgow G1 3AE Scotland Glasgow G1 3AE Scotland (GB)