EP 1071895 A1 20010131 - DOUBLE GAS SEAL WITH COPLANAR PAD FACES
Title (en)
DOUBLE GAS SEAL WITH COPLANAR PAD FACES
Title (de)
DOPPELTE GLEITRINGDICHTUNG MIT KOPLANAREN GLEITFLÄCHEN
Title (fr)
JOINT D'ETANCHEITE DOUBLE POUR GAZ A SURFACES D'ETANCHEITE COPLANAIRES
Publication
Application
Priority
- US 9905319 W 19990310
- US 7904598 P 19980323
Abstract (en)
[origin: WO9949244A1] A double gas pressure seal (10) is provided for sealing between a stationary housing (14) and a rotary housing (26). The gas pressure seal includes a stationary ring (42) and a rotary ring (40) each having a radially inner sealing face and a radially outer sealing face. A biasing spring (56) biases one of the rings toward the other ring. An annular groove (68) is provided in one of the rings, with the groove being spaced between the radially inner sealing faces and radially outer sealing faces. A supply port (84) supplies pressurised gas to the annular groove at a pressure higher than the process fluid in the stationary housing. A plurality of radially inner and radially outer recesses (94, 96) are provided on the one of the rings, and corresponding feed channels (98, 100) fluidly interconnect the annular groove with a rotary leading portion of each respective recess. A small quantity of pressurized gas escapes between the inner sealing faces to atmosphere and between the outer sealing faces to the process fluid sealed in the stationary housing.
IPC 1-7
IPC 8 full level
F16J 15/34 (2006.01)
CPC (source: EP)
F16J 15/3412 (2013.01); F16J 15/348 (2013.01)
Citation (search report)
See references of WO 9949244A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9949244 A1 19990930; AU 3079999 A 19991018; CA 2325475 A1 19990930; EP 1071895 A1 20010131; MX PA00009286 A 20020508
DOCDB simple family (application)
US 9905319 W 19990310; AU 3079999 A 19990310; CA 2325475 A 19990310; EP 99912422 A 19990310; MX PA00009286 A 19990310