(19)
(11) EP 0 179 658 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.01.1987 Bulletin 1987/05

(43) Date of publication A2:
30.04.1986 Bulletin 1986/18

(21) Application number: 85307666

(22) Date of filing: 24.10.1985
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 26.10.1984 US 665026

(71) Applicant: ALBANY INTERNATIONAL CORP.
 ()

(72) Inventors:
  • Bolton, Joseph A.
     ()
  • Adamczyk, Phillip L.
     ()

   


(54) Surge control system


(57) A surge control stem for dewatering press felts on a papermaking machir e which includes a suction pipe (12), a variable speed driven otor (38), a centrifugal exhauster (26) driven by the variable speed drive motor and connected to the suction pipe to provide vacuum to a felt (14) passing over a slot (18) for dewatering thereof. A surge valve (28) is provided and is opened to admit air to the centrifugal exhauster (26) so as to prevent surge when the centrifugal exhauster is operating at a predetermined level at which the centrifugal exhauster will surge.






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