| 摘要 |
A VALVE PLATE (20) FOR A SLIDING GATE VALVE (10) HAS A REFRACTORY PLATE (22) AND A METAL SHELL (33) SURROUNDING IT. ASSOCIATED WITH THE PLATE (20) ARE CENTERING MEANS WHICH IS CONSTITUTED BY PREFERABLY TWO ABUTMENT SURFACE (23, 24),WHICH ARE ARRANGED AT A DEFINED SPACING FROM ONE ANOTHER AND WHICH RISE UP SUBSTANTIALLY AT LEAST PARTIALLY PERPENDICULARLY TOWARDS THE PLATE SUPPORT (26) CONSTITUTEDY THE METAL SHELL (21) AND HAVE A THICKNESS SUBSTANTIALLY EQUAL TO THE METAL SHELL THICKNESS (21' ). THESE ABUTMENT SURFACE (23, 24) ARE SO ARRANGED THAT, IN THE INSERTED AND CENTRED STATE OF THE PLATE (20), THEY ENGAGE CORRESPONDINGLY SHAPED ABUTMENT SURFACE (18' , 19' ) ON THE METAL FRAME (14, 15). THIS PLATE (20) MAY THUS BE MANUFACTURED SIMPLY AND ECONOMICALLY.
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