Manual and Hydraulic Gate Valve
Petrotrim Services provides the
"NEW" style Body Bushing.
Some other companies provide the
"OLD" style Body Bushing.
Below is the difference between
the two different styles, NEW vs. OLD.
The new Body Bushing is designed
to overcome the following problems.
1) Eliminate pressure trapping in
the valve cavity when the gate is either fully open or
2) Eliminate the tendency for the
Seat Ring and Body Bushing to seal on the pressure side of the gate. (Upstream
sealing). This effect increases the force to move the
In most cases the Teflon Seal
Ring is the same one used on the Stellite Seat Ring.