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A shut-off valve apparatus has a valve body and a valve member coupled to the valve body. The valve member is movable between a first position blocking material flow through the valve body and a second position permitting material flow through the valve body. A pneumatic actuator receives pressurize

A shut-off valve apparatus has a valve body and a valve member coupled to the valve body. The valve member is movable between a first position blocking material flow through the valve body and a second position permitting material flow through the valve body. A pneumatic actuator receives pressurized air to move the valve member from the first position to the second position. A pneumatic exhaust controller controls the flow of pressurized air into and out of the pneumatic actuator.

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1. A shut-off valve apparatus comprisinga valve body and a valve member coupled to the valve body, the valve member being movable between a first position blocking material flow through the valve body and a second position permitting material flow through the valve body,a pneumatic actuator that, wh

1. A shut-off valve apparatus comprisinga valve body and a valve member coupled to the valve body, the valve member being movable between a first position blocking material flow through the valve body and a second position permitting material flow through the valve body,a pneumatic actuator that, when actuated by pressurized air, moves and interacts with the valve member being isolated from the pressurized air to move the valve member from the first position to the second position,a manifold having a first portal configured to receive pressurized air, a second portal coupled to the pneumatic actuator, and an exhaust portal,regulator means coupled to the manifold for closing the exhaust portal in response to pressurized air being communicated to the regulator means through the first portal and for passing pressurized air to the second portal when pressurized air is communicated to the regulator means through the first portal, the pneumatic actuator being actuated by pressurized air exiting the manifold through the second portal, andan electrical actuator configurable between a blocking position blocking pneumatic communication between the first portal and the regulator means and an unblocking position allowing pneumatic communication between the first portal and the regulator means. 2. The shut-off valve apparatus of claim 1, wherein the electrical actuator comprises a solenoid valve coupled to the manifold, the solenoid valve is configured to block communication of pressurized air from the first portal to the regulator means when the solenoid valve is de-energized, and the solenoid valve being configured to permit communication of pressurized air from the first portal to the regulator means when the solenoid valve is energized. 3. The shut-off valve apparatus of claim 2, wherein the regulator means comprises a closure disk portion that moves to a first position closing the exhaust portal when the solenoid valve is energized and the first portal is exposed to pressurized air and that moves to a second position opening the exhaust portal when the solenoid valve is de-energized and the second portal is exposed to pressurized air. 4. The shut-off valve apparatus of claim 3, wherein the closure disk portion has a periphery, the regulator means comprises a valve portion appended to the periphery of the closure disk portion, and the valve portion moves relative to the closure disk portion to permit pressurized air to flow past the valve portion to reach the second portal when the closure disk portion is in the first position. 5. The shut-off valve apparatus of claim 2, wherein the regulator means comprises a diaphragm, the diaphragm has a closure disk portion that closes the exhaust portal when the solenoid valve is energized and the first portal receives pressurized air, and the diaphragm has a valve portion around which pressurized air flows to reach the second portal when the closure disk portion is closing the exhaust portal. 6. The shut-off valve apparatus of claim 5, wherein the regulator means comprises a guide coupled to the diaphragm, the manifold has a guide-receiving passage, the guide extends away from the diaphragm and into the guide-receiving passage, and the guide moves within the guide-receiving passage when the diaphragm moves. 7. The shut-off valve apparatus of claim 5, wherein the regulator means further comprises a backing member coupled to the diaphragm and the closure disk portion is sandwiched between the backing member and the exhaust portal when the diaphragm closes the exhaust portal. 8. The shut-off valve apparatus of claim 5, wherein the manifold has a surface defining a chamber, the diaphragm is received in the chamber, the diaphragm has a circular outer region that engages the surface when pressurized air flows from the second portal to the exhaust portal, and at least a portion of the circular outer region of the diaphragm is disengaged from the surface when pressurized air flows from the first portal to the second portal. 9. The shut-off valve apparatus of claim 2, wherein the solenoid valve has a plunger that is movable along a first axis, the regulator means comprises a member that moves along a second axis, and the first axis is orthogonal to the second axis. 10. The shut-off valve apparatus of claim 9, wherein the second axis passes through the exhaust portal. 11. The shut-off valve of claim 9, wherein the first portal extends along a third axis that is orthogonal to the first axis and that is orthogonal to the second axis. 12. The shut-off valve apparatus of claim 9, wherein the second portal extends along a third axis that is orthogonal to the first axis and that is orthogonal to the second axis. 13. The shut-off valve apparatus of claim 9, wherein the solenoid valve has a vent passage that extends along the first axis, the plunger has an outer surface, and pressurized air flows around the outer surface of the plunger and through the vent passage when the solenoid valve is de-energized. 14. The shut-off valve apparatus of claim 1, wherein the regulator means comprises a diaphragm having a first side and a second side, the diaphragm moves to a first position closing the exhaust portal when a pressure to which the first side is exposed exceeds a pressure to which the second side is exposed, and the diaphragm moves to a second position opening the exhaust portal when the pressure to which the second side is exposed exceeds the pressure to which the first side is exposed. 15. The shut-off valve apparatus of claim 14, wherein the diaphragm comprises a closure disk portion having a periphery, the diaphragm comprises a valve portion appended to the periphery of the closure disk portion, and pressurized air flows around the valve portion to reach the second portal when the closure disk portion is in the first position. 16. The shut-off valve apparatus of claim 14, wherein the first portal is in pneumatic communication with the second portal when the diaphragm is in the first position and the second portal is in pneumatic communication with the exhaust portal when the diaphragm is in the second position. 17. The shut-off valve apparatus of claim 14, wherein the manifold comprises a manifold block and a manifold cap coupled to the manifold block, the manifold cap has a cylindrical wall that defines the exhaust portal, the cylindrical wall has an end that provides a valve seat facing toward the diaphragm, and the second side of the diaphragm engages the valve seat when the diaphragm is in the first position. 18. The shut-off valve apparatus of claim 14, wherein the regulator means comprises a guide coupled to the diaphragm, the manifold has a guide-receiving passage, the guide extends away from the diaphragm and into the guide-receiving passage, and the guide moves within the guide-receiving passage when the diaphragm moves. 19. The shut-off valve apparatus of claim 18, wherein the regulator means comprises a backing member appended to the guide and the backing member abuts a portion of the first side of the diaphragm. 20. The shut-off valve apparatus of claim 1, further comprising a housing that surrounds the pneumatic actuator, the manifold, and the electrical actuator. 21. The shut-off valve apparatus of claim 20, wherein the housing has an opening aligned with the first portal. 22. A shut-off valve apparatus comprisinga main valve assembly having a valve body and a valve member coupled to the valve body, the valve member being movable between a first position blocking material flow through the valve body and a second position permitting material flow through the valve body,a pneumatic actuator that, when actuated, moves the valve member from the first position to the second position, anda controller having a manifold, a solenoid valve mounted to the manifold, and a quick-exhaust portion mounted to the manifold, the manifold being configured to permit pressurized air to flow therethrough to actuate the pneumatic actuator whe n the quick-exhaust portion is closed and the solenoid valve is energized, and the controller having a check valve that is openable to permit pressurized air to flow therethrough when the quick-exhaust portion is closed and the solenoid valve is de-energized. 23. The shut-off valve apparatus of claim 22, wherein the quick-exhaust portion has an exhaust portal extending along an axis, the check valve comprises a ball and a compression spring, and the ball is movable in parallel relation with the axis. 24. The shut-off valve apparatus of claim 22, further comprising a diaphragm that is movable along a first axis between a first position in which the quick-exhaust portion is opened and a second position in which the quick-exhaust portion is closed, the check valve comprises a ball that is movable along a second axis parallel with the first axis, and the solenoid valve comprises a plunger that is movable along a third axis orthogonal to the first axis. 25. The shut-off valve apparatus of claim 22, wherein the solenoid valve has a vent passage and the pressurized air flowing through the check valve also flows through the vent passage. 26. The shut-off valve apparatus of claim 22, wherein the manifold has a set of passages in which the check valve is situated. 27. A shut-off valve apparatus comprisinga main valve assembly having a valve body and a valve member coupled to the valve body, the valve member being movable between a first position blocking material flow through the valve body and a second position permitting material flow through the valve body,a pneumatic actuator actuated by pressurized air that, when actuated, moves and interacts with the valve member being isolated from the pressurized air to move the valve member from the first position to the second position, anda manifold having a first portal configured to receive pressurized air, a second portal coupled to the pneumatic actuator, and an exhaust portal,a diaphragm movable relative to the manifold between a first position closing the exhaust portal to permit pressurized air to flow through the manifold from the first portal to the second portal and a second position opening the exhaust portal to permit pressurized air to flow through the manifold from the second portal to the exhaust portal, anda guide coupled to the diaphragm, the manifold having a guide-receiving passage that receives at least a portion of the guide and the guide moves within the guide-receiving passage when the diaphragm moves between the first and second positions. 28. The shut-off valve apparatus of claim 27, further comprising a backing member coupled to the diaphragm and the diaphragm being situated between the backing member and the exhaust portal. 29. The shut-off valve apparatus of claim 27, wherein the exhaust portal defines an axis and the guide-receiving passage extends along the axis. 30. The shut-off valve apparatus of claim 27, wherein the manifold has a chamber in pneumatic communication with the second portal and the exhaust portal, the diaphragm is situated in the chamber, and the guide maintains the diaphragm in a proper orientation as the diaphragm moves between the first and second positions. 31. The shut-off valve apparatus of claim 27, wherein the diaphragm moves vertically between the first and second positions. 32. The shut-off valve apparatus of claim 31, wherein the diaphragm is biased by gravity toward the second position. 33. The shut-off valve apparatus of claim 1, wherein the pneumatic actuator further comprises a cylindrical wall and the movable member comprises a piston head situated in an interior region of the cylindrical wall. 34. The shut-off valve apparatus of claim 33, wherein the pneumatic actuator comprises a piston rod that is coupled to the piston head and that extends out of the interior region of the cylindrical wall, and further comprising a switch that is engaged by a portion of the piston rod outside the interior region to indicate the position of th e piston rod relative to the cylindrical wall. 35. The shut-off valve apparatus of claim 33, further comprising a rod coupled to the valve member and a disc coupled to the rod, the piston head engaging the disc, and the piston head interacting with the valve member via the disc and the rod. 36. The shut-off valve apparatus of claim 35, wherein the valve body comprises a second cylindrical wall extending into the interior region of the cylindrical wall of the pneumatic actuator and terminating at a surface, the rod extending through a passage provided by the second cylindrical wall, and the disc engaging the surface when the valve member is in the second position. 37. The shut-off valve apparatus of claim 35, further comprising a spring compressed between the disc and the valve body to bias the valve member toward the first position. 38. The shut-off valve apparatus of claim 27, wherein the pneumatic actuator further comprises a cylindrical wall and the movable member comprises a piston head situated in an interior region of the cylindrical wall. 39. The shut-off valve apparatus of claim 38, wherein the pneumatic actuator comprises a piston rod that is coupled to the piston head and that extends out of the interior region of the cylindrical wall, and further comprising a switch that is engaged by a portion of the piston rod outside the interior region to indicate the position of the piston rod relative to the cylindrical wall. 40. The shut-off valve apparatus of claim 38, further comprising a rod coupled to the valve member and a disc coupled to the rod, the piston head engaging the disc, and the piston head interacting with the valve member via the disc and the rod. 41. The shut-off valve apparatus of claim 40, wherein the valve body comprises a second cylindrical wall extending into the interior region of the cylindrical wall of the pneumatic actuator and terminating at a surface, the rod extending through a passage provided by the second cylindrical wall, and the disc engaging the surface when the valve members is in the second position. 42. The shut-off valve apparatus of claim 40, further comprising a spring compressed between the disc and the valve body to bias the valve member toward the first position.