The type FFA hanger head is to be placed over the production tubing head fitted with the TA-1 bottom-type production tubing hanger. The hanger is fixed inside the hanger head by a threaded collar. 

The FFB-3 and FFB-4 adapters are receiving the production tubing hangers protruding upwards from the production tubing head and are providing a sealing by means of type „P” sealing rings. In the bottom flange, there are two taper check valves and housing plasticizers through which the sealing elements may be plasticized. In the bottom flange, there is also a ball valve for monitoring the pressure developing inside the packing ring.

The type FFB-4 adapter is of the same design as the FFB-3, but it has a radial inspection hole between the two „P” seals, ending in a 1/2” NPT thread at the outside of the flange. In both types, a control line may pass through the hanger, with an outlet on the adapter’s side. This outlet is to be blocked by a safety valve. 

The type MA adapter serves for suspending the well’s production tubing string. The female-threaded bottom connection may be configured as requested by the Client (EU, GOST, VAM, VAGT, LC, etc.).

Sizes

Bottom flange:    7 1/16"  -  11"

Top flange:          2 9/16"   -  9"

Additional sizes are available upon request.
DKG VALVE reserves the right to change the Specifications without notice!