API FLANGE CHECK VALVE  
AH44Y/W 
Nominal Diameter:2"-20" 
Pressure Class:150Lb-2500Lb 
Suitable Temperature:LESS THAN 550 DEG 
Suitable Medium:WATER  STEAM  OIL  NITRIC  ACID  ACETIC  ACID 
Material: WCB WC6 CF8M ETC