Keystone Fig AR1/AR2

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General Application

Ideally suited for many high performance applications, such as fire protection, water treatment, cooling systems, food and beverage and bulk product handling. Consult us for appropriate materials for specific services.

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Technical Data

Size Range :

Figure AR1 (wafer style) 2 thru 36-inch
Figure AR2 (lugged style) 2 thru 24-inch

Flange Standard :

ANSI Class 125/150

Materials

 Part    Standard Material    Material Specification    Optional Material  
 1. Body    Cast iron    ASTM A-126, Class B    Carbon steel  
   Ductile iron    ASTM A-395 GR 60/40/18    Stainless steel  
 2. Disc    Ductile iron    ASTM A-536 GR 65/45/12    
   Aluminum bronze    ASTM B-148, UNS C95200 Grade A    
   316 Stainless steel    ASTM A-743, CF8M    
 3. Stem    316 Stainless steel (2 thru 12-inch)    ASTM A-276 UNS S31600    
   18-8 Stainless steel (14 thru 20-inch)    ASTM A-276 UNS S30400    
   17-4 PH Stainless steel (24 thru 36-inch)    ASTM A-564 UNS S17400    Phosphate treated steel  
   (2 thru 20-inch)    ASTM A-108 UNS G10450    
 4. Seat    NBR food grade (0°F thru 212°F)      Fluoroelastomer (FKM)  
   EPDM food grade (-40°F thru 250°F)      White NBR  
 5. Upper stem bushing    Polyester (2 thru 20-inch) Bronze (24 thru 36-inch)      
 6. Stem packing    NBR      
 7. Torque plug (2 thru 12-inch)    316 Stainless steel    ASTM A-276 UNS S31600 condition A    
 7. Disc screws (14 thru 20-inch)    316 Stainless steel    ASTM F-593 Group 2 condition CW1    
 7. Taper pins (24 thru 36-inch)    17-4 PH Stainless steel    ASTM A564 UNS S17400 H1075    
 8. Bearings (2 thru 12-inch)    Sintered metal      

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