Valve handles and dual-valve assemblies having handles are disclosed herein. An example dual-valve assembly includes a first valve having a first shaft. The first valve has a plate with a notch. The dual-valve assembly also includes a second valve having a second shaft. The dual-valve assembly further includes a handle coupled to the first and second shafts, such that when the handle is rotated, the first and second shafts are rotated simultaneously. The handle includes a body and a flexible arm coupled to and extending from the body. The flexible arm has a lock edge sized to fit within the notch to limit rotation of the handle relative to the first and second valves.

A device for shutting off a pipe, the pipe allowing fluidic circulation of at least one fluid, the shut-off device having an in-line shut-off means for shutting off the pipe in a sealed manner and, conversely, for opening the pipe, an upstream valve arranged upstream of the in-line shut-off means, and a downstream valve arranged downstream of the in-line shut-off means. The shut-off device has an interlocking system for interlocking a member for tightly closing the in-line shut-off means with, for the one part, an upstream control member of the upstream valve and, for the other part, a downstream control member of the downstream valve, the interlocking system being movable in translation in a direction OX between a first end position and a second end position, the interlocking system having at least three separate parts assembled together.

A device for shutting off a pipe, the pipe allowing fluidic circulation of at least one fluid, the shut-off device having an in-line shut-off means for shutting off the pipe in a sealed manner and, conversely, for opening the pipe, an upstream valve arranged upstream of the in-line shut-off means, and a downstream valve arranged downstream of the in-line shut-off means. The shut-off device has an interlocking system for interlocking a member for tightly closing the in-line shut-off means with, for the one part, an upstream control member of the upstream valve and, for the other part, a downstream control member of the downstream valve, the interlocking system being movable in translation in a direction OX between a first end position and a second end position, the interlocking system having at least three separate parts assembled together.

A dual trip manifold assembly (TMA) includes an isolation valve assembly having a first valve configured to receive a flow of fluid from a hydraulic system fluid supply. The first valve is configured to channel the flow of fluid to at least one hydraulic circuit. The isolation valve assembly also includes a second valve configured to receive the flow of fluid from the at least one hydraulic circuit of the at least two hydraulic circuits. The second valve is further configured to channel the fluid flow to a trip header and to receive the fluid flow from the trip header. The first valve and the second valve are synchronized to each other such that rotation of one of said first and second valves causes a substantially similar rotation in the other of said first and second valves header.

A dual trip manifold assembly (TMA) includes an isolation valve assembly having a first valve configured to receive a flow of fluid from a hydraulic system fluid supply. The first valve is configured to channel the flow of fluid to at least one hydraulic circuit. The isolation valve assembly also includes a second valve configured to receive the flow of fluid from the at least one hydraulic circuit of the at least two hydraulic circuits. The second valve is further configured to channel the fluid flow to a trip header and to receive the fluid flow from the trip header. The first valve and the second valve are synchronized to each other such that rotation of one of said first and second valves causes a substantially similar rotation in the other of said first and second valves header.

A mix manifold (16) includes a plurality of valves to control the flow of material therethrough. First and second valves (36a, 36b) are linked for simultaneous actuation. The first and second valves each include valve members (56a, 56b) disposed within and rotatable relative to seal bodies (58a, 58b). The valve members seal against the seal bodies and the seal bodies seal against the manifold. A solvent valve (36c) also includes a valve member (56c) in a seal body (58c). The first and second valves are configured to open only when the solvent valve is closed. The solvent valve is configured to open only when the first and second valves are closed. The solvent valve can rotate between a plurality of positions to control the flow of solvent to flowpaths downstream of the first and second valves.

A valve assembly having a bolt with a through hole for a security wire includes at least one valve of the valve assembly mechanically coupled to a pipe or to a section of another component of the valve assembly by a coupling or by a pair of mating flanges. At least one hollow bolt is bolted through a closing bolt hole of the coupling or a joining bolt hole of the pair of mating flanges. The at least one hollow bolt accepts a safety wire run completely through the hollow bolt in a longitudinal direction of the hollow bolt and extending completely through the closing bolt hole of the coupling or the joining bolt hole of the pair of mating flanges.

A valve assembly having a bolt with a through hole for a security wire includes at least one valve of the valve assembly mechanically coupled to a pipe or to a section of another component of the valve assembly by a coupling or by a pair of mating flanges. At least one hollow bolt is bolted through a closing bolt hole of the coupling or a joining bolt hole of the pair of mating flanges. The at least one hollow bolt accepts a safety wire run completely through the hollow bolt in a longitudinal direction of the hollow bolt and extending completely through the closing bolt hole of the coupling or the joining bolt hole of the pair of mating flanges.

A stream switching valve for alternatively feeding two fluids to an object of interest comprises a housing having first, second and third cavities, first, second and third ball members sealably placeable into said first, second and third cavities, first and second inlet passages being in fluid communication with said first and second cavities, an outlet passage being in fluid communication with said third cavity; said outlet passage connectable to an object of interest; first and second intermediate passages fluidly connecting said first and second cavities to said third cavity, first, second and third vent passages fluidly connecting said into first, second and third cavities to environment. The first and second ball members are configured to connect said first and second intermediate passages to first and second inlet passages and first and second vent passages, respectively, in turn. The third ball member is rotatable and configured to connect said outlet passage to said first intermediate passage, said second intermediate passage and said third vent passage, in turn.

A stream switching valve for alternatively feeding two fluids to an object of interest comprises a housing having first, second and third cavities, first, second and third ball members sealably placeable into said first, second and third cavities, first and second inlet passages being in fluid communication with said first and second cavities, an outlet passage being in fluid communication with said third cavity; said outlet passage connectable to an object of interest; first and second intermediate passages fluidly connecting said first and second cavities to said third cavity, first, second and third vent passages fluidly connecting said into first, second and third cavities to environment. The first and second ball members are configured to connect said first and second intermediate passages to first and second inlet passages and first and second vent passages, respectively, in turn. The third ball member is rotatable and configured to connect said outlet passage to said first intermediate passage, said second intermediate passage and said third vent passage, in turn.