An apparatus for controlling the rate of flow of fluid mold material from an injection molding machine to a mold cavity, the apparatus comprising: a manifold that receives an injection fluid mold material, the manifold having a delivery channel that delivers the injection fluid mold material under an injection pressure to a gate of a mold cavity disposed within a mold, the gate being controllably opened and closed by a valve pin having a pin axis, the valve pin being slidably mounted for reciprocal upstream and downstream linear movement along the pin axis such that a downstream end of the valve pin is drivable into and out of open and closed positions relative to the gate, an electric actuator comprising an electric motor comprised of a motor housing that houses a drive shaft having a drive gear and a drive axis that is rotatably mounted within the motor housing and is drivably rotatable around the drive axis by a source of electrical power or energy and a transmission comprised of a transmission gear (72, 190, 195, 197) rotatably mounted within a transmission housing, the transmission gear (72, 190, 195, 197) having a gear axis and being drivably rotatable around the gear axis, the drive gear, the transmission gear (72, 190, 195, 197) and the valve pin being drivably interconnected and arranged such that the drive axis and the gear axis are non-coaxially mounted or disposed relative to each other and such that driven rotation of the drive gear around the drive axis rotatably drives the transmission gear (72, 190, 195, 197) around the gear axis and linearly drives the valve pin along the pin axis, wherein one or the other of the motor housing or the transmission housing are removably attached to a top clamping or mounting plate that is mounted upstream of the manifold and fixedly interconnected to the mold. a manifold that receives an injection fluid mold material, the manifold having a delivery channel that delivers the injection fluid mold material under an injection pressure to a gate of a mold cavity disposed within a mold, the gate being controllably opened and closed by a valve pin having a pin axis, the valve pin being slidably mounted for reciprocal upstream and downstream linear movement along the pin axis such that a downstream end of the valve pin is drivable into and out of open and closed positions relative to the gate, an electric actuator comprising an electric motor comprised of a motor housing that houses a drive shaft having a drive gear and a drive axis that is rotatably mounted within the motor housing and is drivably rotatable around the drive axis by a source of electrical power or energy and a transmission comprised of a transmission gear (72, 190, 195, 197) rotatably mounted within a transmission housing, the transmission gear (72, 190, 195, 197) having a gear axis and being drivably rotatable around the gear axis, the drive gear, the transmission gear (72, 190, 195, 197) and the valve pin being drivably interconnected and arranged such that the drive axis and the gear axis are non-coaxially mounted or disposed relative to each other and such that driven rotation of the drive gear around the drive axis rotatably drives the transmission gear (72, 190, 195, 197) around the gear axis and linearly drives the valve pin along the pin axis, wherein one or the other of the motor housing or the transmission housing are removably attached to a top clamping or mounting plate that is mounted upstream of the manifold and fixedly interconnected to the mold.