API602 Forged globe, bellow sealed
                            
                            Design standard:
                            Basic standard:	API 602, BS5352, ASME B16.34;
Flange connection dimesion:	ASME B16.5
                
             
            
            
            	
                
                	API594 Casted Wafer Check, Dual-plate
                            
                            Design standard:
                            Basic standard:	API 594, ASME B16.34;
Flange connection dimesion:	ASME B16.5, ASME B16.47, DIN 2501
                
             
            
            
            	
                
                	BS1868 Casted Swing Check, Bolted Cover
                            
                            Design standard:
                            Basic standard:	BS1868, ASME B16.34, API 6D;
Flange connection dimesion:	ASME B16.5, ASME B16.47 , DIN 2501
                
             
            
            
            	
                
                	BS1868 Casted Swing Check with Damping Device, Bolted Cover
                            
                            Design standard:
                            Basic standard:  BS1868, ASME B16.34, API 6D ;
Flange connection dimesion: ASME B16.5, ASME B16.47 , DIN 2501
                
             
            
            
            	
                
                	BS1868 Casted Swing Check, Pressure Sealed Cover
                            
                            Design standard:
                            Basic standard:	BS1868, ASME B16.34, API 6D;
Flange connection dimesion:	ASME B16.5, ASME B16.47 , DIN 2501
                
             
            
            
            	
                
                	BS1868 Casted Horizontal Lift Check,Bolted Cover
                            
                            Design standard:
                            Basic standard:  BS1868, ASME B16.34;
Flange connection dimesion: ASME B16.5, DIN 2501