Material : Body : Cast Iron , Ductile Iron , Bronze / Aluminum Iron, AISI304/316;
                         Disc : Cast Iron , Ductile Iron , Bronze , AISI304/316;
                         Seat : EPDM , PTFE , NBR , VITON ;
                         Stem : Stainless Steel,Carbon Steel;

Dimension: DN 50 - DN 1200 (2" -- 48 ")

Design Std: MSS SP-67 , API609 , EN593

Features: Face to Face : API609, ISO5752 Series20 , BS5155,MSS SP-67; Test : API598 , ISO5208.
  Top Flange: ISO5211, AWWA C504;
  Quick 90 degrees on-off operatior. energy saving .
  Test to API598, ISO5208
  lever , worm gear , pneumatic apparatus , electronic operation
  surface treament per electroplating , nylon plating coating , epoxy coating
  Top Flange：ISO5211.