الوصف

Standard:
Design standard conform to: ANSI/AWWA C**4
 Connection flange conform to: DIN PN*0/*6/*5, ANSI B*6.1, BS***4, ISO PN*0/*6,
 JIS B***2/***3, BS *0 Table D, BS *0 Table E
Top flange conform to: ISO ***1
Face to face conform to: BS***5 Short, ISO***2 (Series *3), DIN ***2 F*6
Test standard conform to: API**8

Design characters:
 1. Correcting holes are made on flange according to standard, easy correcting during the installation.
Through-out bolt or one-side bolt used. Easy replacing and maintenance.
Shaft and disc connected by pin, torque screw or non pin, to achieve the opening and closing.
Performance:
 Nominal Diameter: DN**-DN***0
 Nominal Pressure PN (MPa):
  1.0, 1.6, 2.0, 2.5
Testing pressure (water) Ps (MPa)
      Body seat: 1.5 times rated pressure
      Seat test:  1.1 times rated pressure
Suitable medium: fresh water, sea water, gas, oils, acids, alkalis, etc.