A bleed valve comprising: a valve housing with a main flow passage and a bore; a shaft with a first end and a second end, wherein the shaft extends across the main flow passage and is rotatable about an axis; a flow control member mounted to the shaft, wherein the flow control member is configured to regulate a flow of a fluid through the main flow passage; a bearing housing with a bearing compartment, the bearing housing connected to the valve housing, wherein the first end of the shaft extends through the bore of the valve housing into the bearing compartment; a bearing assembly disposed in the bearing compartment; and a seal assembly disposed between the valve housing and the shaft, the seal assembly comprising: a first seal piece circumferentially surrounding the shaft and disposed between the shaft and the valve housing, wherein an axial length of the first seal piece relative to the shaft is greater than an axial length of the bore of the valve housing relative to the shaft; and a second seal piece in contact with and disposed axially adjacent to the first seal piece relative to the shaft, wherein the second seal piece is axially biased against the first seal piece relative to the shaft, and characterized in that the first seal piece comprises a collar with a cylindrical portion extending axially and a flange extending radially relative to the shaft, and wherein the second seal piece includes a radially inward portion with an inner edge, a radially outward portion with an outer edge, and a radially intermediate portion, wherein the radially inward portion is axially biased against the flange of the first seal piece relative to the shaft. a valve housing with a main flow passage and a bore; a shaft with a first end and a second end, wherein the shaft extends across the main flow passage and is rotatable about an axis; a flow control member mounted to the shaft, wherein the flow control member is configured to regulate a flow of a fluid through the main flow passage; a bearing housing with a bearing compartment, the bearing housing connected to the valve housing, wherein the first end of the shaft extends through the bore of the valve housing into the bearing compartment; a bearing assembly disposed in the bearing compartment; and a seal assembly disposed between the valve housing and the shaft, the seal assembly comprising: a first seal piece circumferentially surrounding the shaft and disposed between the shaft and the valve housing, wherein an axial length of the first seal piece relative to the shaft is greater than an axial length of the bore of the valve housing relative to the shaft; and a second seal piece in contact with and disposed axially adjacent to the first seal piece relative to the shaft, wherein the second seal piece is axially biased against the first seal piece relative to the shaft, and characterized in that the first seal piece comprises a collar with a cylindrical portion extending axially and a flange extending radially relative to the shaft, and wherein the second seal piece includes a radially inward portion with an inner edge, a radially outward portion with an outer edge, and a radially intermediate portion, wherein the radially inward portion is axially biased against the flange of the first seal piece relative to the shaft. a first seal piece circumferentially surrounding the shaft and disposed between the shaft and the valve housing, wherein an axial length of the first seal piece relative to the shaft is greater than an axial length of the bore of the valve housing relative to the shaft; and a second seal piece in contact with and disposed axially adjacent to the first seal piece relative to the shaft, wherein the second seal piece is axially biased against the first seal piece relative to the shaft, and characterized in that the first seal piece comprises a collar with a cylindrical portion extending axially and a flange extending radially relative to the shaft, and wherein the second seal piece includes a radially inward portion with an inner edge, a radially outward portion with an outer edge, and a radially intermediate portion, wherein the radially inward portion is axially biased against the flange of the first seal piece relative to the shaft.