A valve assembly for use downhole comprising: a housing having a chamber; an inlet formed through an end of the housing ; a valve element , selectively disposed in a first position in sealing engagement with the inlet to form a barrier between the chamber and an environment ambient to the housing , and selectively moveable to a second position spaced away from the inlet to provide fluid communication between the chamber and the environment ; characterized by , an elongated valve stem disposed in the chamber having an end attached to the valve element , a second diaphragm surface distal from the valve element profiled with an enlarged radius; a surface on a side of the second diaphragm surface facing away from the valve element that is in communication with the environment , and has an area substantially the same as an area of a side of the valve element facing away from the inlet ; a motor in the chamber and coupled to the valve stem ; a first diaphragm surface attached to the valve stem between the motor and the valve element , and having a radial surface facing the valve element with an area substantially the same as a surface area of the valve element in communication with the chamber when the valve element is in the first position; first bellows having an end attached to the first diaphragm surface , and an opposite end attached to the motor ; and second bellows having an end attached to the second diaphragm surface , and an opposing end attached to the motor . a housing having a chamber; an inlet formed through an end of the housing ; a valve element , selectively disposed in a first position in sealing engagement with the inlet to form a barrier between the chamber and an environment ambient to the housing , and selectively moveable to a second position spaced away from the inlet to provide fluid communication between the chamber and the environment ; selectively disposed in a first position in sealing engagement with the inlet to form a barrier between the chamber and an environment ambient to the housing , and selectively moveable to a second position spaced away from the inlet to provide fluid communication between the chamber and the environment ; an elongated valve stem disposed in the chamber having an end attached to the valve element , a second diaphragm surface distal from the valve element profiled with an enlarged radius; a surface on a side of the second diaphragm surface facing away from the valve element that is in communication with the environment , and has an area substantially the same as an area of a side of the valve element facing away from the inlet ; a motor in the chamber and coupled to the valve stem ; a first diaphragm surface attached to the valve stem between the motor and the valve element , and having a radial surface facing the valve element with an area substantially the same as a surface area of the valve element in communication with the chamber when the valve element is in the first position; first bellows having an end attached to the first diaphragm surface , and an opposite end attached to the motor ; and second bellows having an end attached to the second diaphragm surface , and an opposing end attached to the motor . <EOS>