Abstract:
A header ring for use in a stuffing box comprising an annular body portion of an elastomeric material, an annular radially inward projecting sealing lip portion formed on said body portion and an annular, axially facing pedestal portion formed on said body portion, said pedestal portion defining an annularly extending radially inwardly facing pedestal surface, the sealing lip portion defining an annularly extending, radially inward facing sealing surface, the sealing surface and the pedestal surface forming a juncture, at least a portion of the pedestal portion adjacent the juncture and forming the pedestal surface and at least a portion of the sealing lip portion adjacent the juncture and forming a portion of the sealing surface being comprised of a layer of reinforced elastomeric material bonded to the body portion.
Abstract:
The seal arrangement (1) for piston compressors comprises a deformable ring support (2) and a first and a second endless sealing ring (3a, 3b), wherein the ring support (2) has a longitudinal axis (L) which extends perpendicularly with respect to its circumferential direction, and wherein the ring support (2) has a gap (2i) with play in its circumferential direction, and wherein each sealing ring (3a, 3b) has a longitudinal axis (3c, 3d) which extends perpendicularly with respect to its circumferential direction, and wherein the sealing rings (3a, 3b) are arranged in such a way that the ring support (2) encloses them from the outside, and wherein the two sealing rings (3a, 3b) are arranged next to one another in the direction of extent of the longitudinal axis (L), and wherein the ring support (2) and the sealing rings (3a, 3b) are designed to be adapted to one another in such a way that the first sealing ring (3a) bears on one side against a first side wall (2d) of the ring support (2) and forms a first gap (S1) to the ring support (2) on the opposite side with regard to the longitudinal axis (3c) of the first sealing ring (3a), and wherein the second sealing ring (3b) bears in a diametrically opposed manner on one side against a second side wall (21) of the ring support (2) and forms a second gap (S2) to the ring support (2) on the opposite side with regard to the longitudinal axis (3d) of the second sealing ring (3b), wherein the first and second side walls (2d, 21) are arranged so as to lie opposite one another with regard to the longitudinal axis (L), with the result that the ring support (2) can in each case bring about a prestressing force (5a, 5b) on the first and second sealing rings (3a, 3b) respectively via the first and second side walls (2d, 21) respectively, wherein the prestressing forces (5a, 5b) extend in an opposed manner.
Abstract:
A header ring for use in a stuffing box comprising an annular body portion of an elastomeric material, an annular radially inward projecting sealing lip portion formed on said body portion and an annular, axially facing pedestal portion formed on said body portion, said pedestal portion defining an annularly extending radially inwardly facing pedestal surface, the sealing lip portion defining an annularly extending, radially inward facing sealing surface, the sealing surface and the pedestal surface forming a juncture, at least a portion of the pedestal portion adjacent the juncture and forming the pedestal surface and at least a portion of the sealing lip portion adjacent the juncture and forming a portion of the sealing surface being comprised of a layer of reinforced elastomeric material bonded to the body portion.
Abstract:
An insert for a pressure sealant type sealing system, an improved sealing system for sealing between an aperture of a machine housing and a rotating shaft of the machine protruding through the aperture, comprising the insert to provide a pair of outlets into the driveshaft arranged collinearly around the driveshaft, a method of injecting the sealant into the stuffing box in two positions on opposite sides of the drive shaft thereby balancing the pressure, and a method of retrofitting existing pressure sealant systems by retrofitting with the insert.
Abstract:
A header ring for use in a stuffing box comprising an annular body portion of an elastomeric material, an annular radially inward projecting sealing lip portion formed on said body portion and an annular, axially facing pedestal portion formed on said body portion, said pedestal portion defining an annularly extending radially inwardly facing pedestal surface, the sealing lip portion defining an annularly extending, radially inward facing sealing surface, the sealing surface and the pedestal surface forming a juncture, at least a portion of the pedestal portion adjacent the juncture and forming the pedestal surface and at least a portion of the sealing lip portion adjacent the juncture and forming a portion of the sealing surface being comprised of a layer of reinforced elastomeric material bonded to the body portion.
Abstract:
A delivery unit (40) for automatically delivering a viscous sealant at a predetermined pressure to a stuffing box (70)of a shaft (20) is disclosed. The delivery unit (40), such as a pressure booster incrementally displaceable piston, is controlled to deliver the sealant at a predetermined pressure on demand when the pressure of the sealant within said stuffing box is less than the predetermined delivery pressure being sufficient to promote adhesion of the sealant onto a shaft segment and to thereby prevent or retard the egress of working fluid from a corresponding working chamber (17) of a machine adapte to perform work by the shaft. A system for reducing the pressure of sealant within a stuffing box by use of the delivery unit and of an impeller-based dynamic seal is also disclosed.
Abstract:
A packing assembly for a valve stem, or the like, comprising two groups of "V"-shaped packing rings, "G" and "H", disposed about the valve stem 16 in a stuffing box 32 provided in the stem receiving bore in the vavve body or bonnet 12. Semi-fluid plastic material 69 is injected between the two groups of packing rings to move them apart and thereby axially compress and radially expand the packing rings into sealing engagement with the valve stem and stuffing box wall. The lower group of packing rings is provided with a pair of non-metallic back up adapter rings at its lower and upper ends. A similar back up adapter ring is provided at the top of the upper group of packing rings. The back up adapter rings 61, 62, 68 serve to stabilize the packing structure. They also serve as stem centralizing rings to preclude galling and scarring of the stem and as anti-extrusion rings to impede extrusion of the packing rings along the stem and bonnet. The upper adapter ring of the lower group also prevents the passage of injected plastic material to the lower group packings and thereby prevents their possible distortion and collapse during installation for sealing.