Abstract: A standstill seal prevents leakage of a process fluid when a shaft is not rotating. The seal includes a flexible band surrounding the shaft that includes a thick, substantially rectangular center region from which thinner side regions extend. Application of pressurized control fluid to a rear surface of the band causes the central region to extend through a gap between cover plates to form a seal with the shaft or an intermediate structure. Depressurizing of the control fluid causes the central region to be withdrawn from the shaft, either entirely due to elasticity of the band, or with the assistance of springs. In various embodiments, the seal is formed radially inward or axially. The side regions can be substantially flat or curved. The standstill seal can be unitary with a rotating shaft seal, and can be upstream or downstream thereof. The control fluid can be the process fluid.

Abstract: A sealing arrangement for sealing a gap between two components which bear flat against one another on the gap side and which can be assembled only by transverse movement, wherein each component has a step on the gap side to form an overlapping stop and the steps are curved along their edges. One of the two components has a first groove which extends in a manner analogous to the curved edge and which is arranged in the set-back partial surface of the gap side of the component in question. The other of the two components has a recess located opposite the groove, and a modular sealing element comprising a sealing strip and a spiral strip is provided, which bears with its first sealing section, protruding from the groove, against a side face of the recess.

Abstract: An axially split pump for conveying a fluid includes an axially split housing with a bottom part and a cover. The bottom part has a first sealing surface and the cover has a second sealing surface. The bottom part and the cover are fastened to one another so that the two sealing surfaces are in direct contact with one another. At least one first sealing groove for the reception of a first sealing element is disposed in the sealing surfaces. A second sealing groove is disposed for the reception of a second sealing element. The first sealing groove and the second sealing groove are connected to one another through a connection region and an elastic pre-loading element is disposed in the connection region, which exerts a pre-load onto one of the two sealing elements.

Abstract: An axially split pump for conveying a fluid has an axially split housing that includes a bottom part and a cover. The bottom part has a first sealing surface and the cover has a second sealing surface, the bottom part and the cover being fastened so that the two sealing surfaces have direct contact. A first sealing groove for the reception of a first string-like sealing element is in the sealing surfaces, and a second sealing groove is provided for the reception of a second string-like element, the second sealing groove being connected to the first sealing groove via an opening. A connection element is in the opening that has two lateral cut-outs respectively for the reception of a one of the string-like sealing elements. The cut-outs are arranged and configured so that the two string-like sealing elements run substantially in parallel in the region of the connection element.

Abstract: A sealing arrangement for sealing a gap between two components which bear flat against one another on the gap side and which can be assembled only by transverse movement, wherein each component has a step on the gap side to form an overlapping stop and the steps are curved along their edges. One of the two components has a first groove which extends in a manner analogous to the curved edge and which is arranged in the set-back partial surface of the gap side of the component in question. The other of the two components has a recess located opposite the groove, and a modular sealing element comprising a sealing strip and a spiral strip is provided, which bears with its first sealing section, protruding from the groove, against a side face of the recess.

Abstract: An axially split pump for conveying a fluid has an axially split housing that includes a bottom part and a cover. The bottom part has a first sealing surface and the cover has a second sealing surface, the bottom part and the cover being fastened so that the two sealing surfaces have direct contact. A first sealing groove for the reception of a first string-like sealing element is in the sealing surfaces, and a second sealing groove is provided for the reception of a second string-like element, the second sealing groove being connected to the first sealing groove via an opening. A connection element is in the opening that has two lateral cut-outs respectively for the reception of a one of the string-like sealing elements. The cut-outs are arranged and configured so that the two string-like sealing elements run substantially in parallel in the region of the connection element.

Abstract: An axially split pump for conveying a fluid includes an axially split housing with a bottom part and a cover. The bottom part has a first sealing surface and the cover has a second sealing surface. The bottom part and the cover are fastened to one another so that the two sealing surfaces are in direct contact with one another. At least one first sealing groove for the reception of a first sealing element is disposed in the sealing surfaces. A second sealing groove is disposed for the reception of a second sealing element. The first sealing groove and the second sealing groove are connected to one another through a connection region and an elastic pre-loading element is disposed in the connection region, which exerts a pre-load onto one of the two sealing elements.

Abstract: The invention refers to a mechanical seal arrangement, comprising: a rotatable seal ring (2), a stationary seal ring (3) and a secondary seal device (5), said secondary seal device (5) being made in one piece and comprising a secondary seal (51) and a ring element (52) of different materials, and the ring element (52) being arranged on the secondary seal (51) on a side directed to the stationary seal ring (3).