"D" PLUG (1 1/2", 1 3/4")


The Type “D” Equalizing Plug is a plug that is designed to hold pressure from below. It can be used in conjunction with many locking devices to bleed off a well in order to perform repairs or replacement of surface equipment. It also has pump through capabilities that would allow an operator to kill a well. A pulling prong is needed to equalize these subs. The prong actuates a secondary valve which allows either fluid bypass or pressure equalization.




1 1/2", 1 3/4"


Max. O.D.



Thread Connection



Flow Area Pump Down (sq. in.)



Flow Area Equalizing Button  (sq. in.)     



Roll Pin

1/16" x 1/2"





1 1/2", 1 3/4"

Part Number            21D01150      




1 1/2", 1 3/4"

Body 21A01605  
Bottom Sub 21A01601  
Outer Spring 90A01502  
Bean Assembly 21D02150  
Secondary Valve       21A01604  
Outer Housing 21A01603  
Inner Housing 21A01602  
Inner Spring 90A01496  
O-Ring #113