A sliding style furnace cap (20; 40; 50), comprising: a furnace tube cap having a first cap portion configured to couple to a furnace tube of a furnace, and having a second cap portion with a bearing assembly arrangement, the furnace tube cap also having an inner tube cap channel passing from the first cap portion to the second cap portion with an inner tube cap channel sealing arrangement configured to extend outside the inner tube cap channel; and a slider having an orifice or channel configured therein passing through the slider, being configured to couple and slide in the bearing assembly arrangement from an inject position to a rinse position, and vice versa, having a cam contoured surface with a first ramp (22a1) configured to couple a first raised surface (22b1) and an intermediate lower surface (22c1), and with a second ramp (22a2) configured to couple the intermediate lower surface (22c1) to a second raised surface (22b2), the slider configured to move towards the inner tube cap channel and cause the bearing assembly arrangement to force a first part of the slider to push against an inner channel sealing arrangement as a corresponding part of the bearing assembly arrangement rides up either the first ramp (22a1) to the first raised surface (22b1) when the slider is moved to the inject position, or the second ramp (22a2) to the second raised surface (22b2) when the slider is moved to the rinse position, and the first part of the slider configured to seal the inner tube cap channel sealing arrangement when the slider is in either the inject position or the rinse position, the slider configured to move away from the inner tube cap channel and cause the bearing assembly arrangement to allow the first part of the slider to float above the inner channel sealing arrangement as the corresponding part of the bearing assembly arrangement rides along the intermediate lower surface (22c1) when the slider is in transition between the inject position and the rinse position, wherein the cam contoured surface includes the first ramp (22a1) configured to couple the first raised surface (22b1) and a first intermediate lower surface (22c1), the second ramp (22a2) configured to couple the first intermediate lower surface (22c1) to the second raised surface (22b2), a third ramp (22a3) configured to couple the second raised surface (22b2) to a second intermediate lower surface (22c2), and a fourth ramp (22a4) configured to couple the second intermediate lower surface (22c2) to a third raised surface (22b3). a furnace tube cap having a first cap portion configured to couple to a furnace tube of a furnace, and having a second cap portion with a bearing assembly arrangement, the furnace tube cap also having an inner tube cap channel passing from the first cap portion to the second cap portion with an inner tube cap channel sealing arrangement configured to extend outside the inner tube cap channel; and a slider having an orifice or channel configured therein passing through the slider, being configured to couple and slide in the bearing assembly arrangement from an inject position to a rinse position, and vice versa, having a cam contoured surface with a first ramp (22a1) configured to couple a first raised surface (22b1) and an intermediate lower surface (22c1), and with a second ramp (22a2) configured to couple the intermediate lower surface (22c1) to a second raised surface (22b2), the slider configured to move towards the inner tube cap channel and cause the bearing assembly arrangement to force a first part of the slider to push against an inner channel sealing arrangement as a corresponding part of the bearing assembly arrangement rides up either the first ramp (22a1) to the first raised surface (22b1) when the slider is moved to the inject position, or the second ramp (22a2) to the second raised surface (22b2) when the slider is moved to the rinse position, and the first part of the slider configured to seal the inner tube cap channel sealing arrangement when the slider is in either the inject position or the rinse position, the slider configured to move away from the inner tube cap channel and cause the bearing assembly arrangement to allow the first part of the slider to float above the inner channel sealing arrangement as the corresponding part of the bearing assembly arrangement rides along the intermediate lower surface (22c1) when the slider is in transition between the inject position and the rinse position, wherein the cam contoured surface includes the first ramp (22a1) configured to couple the first raised surface (22b1) and a first intermediate lower surface (22c1), the second ramp (22a2) configured to couple the first intermediate lower surface (22c1) to the second raised surface (22b2), a third ramp (22a3) configured to couple the second raised surface (22b2) to a second intermediate lower surface (22c2), and a fourth ramp (22a4) configured to couple the second intermediate lower surface (22c2) to a third raised surface (22b3). the first ramp (22a1) configured to couple the first raised surface (22b1) and a first intermediate lower surface (22c1), the second ramp (22a2) configured to couple the first intermediate lower surface (22c1) to the second raised surface (22b2), a third ramp (22a3) configured to couple the second raised surface (22b2) to a second intermediate lower surface (22c2), and a fourth ramp (22a4) configured to couple the second intermediate lower surface (22c2) to a third raised surface (22b3).