A closure element for a fluid end assembly that has two or more recessed grooves formed in its outer surface. The grooves are axially offset. A seal is placed in one and only one of the grooves. As wear occurs, the seal is relocated to one of the other grooves. Instead of a series of axially offset grooves in a single closure element, a kit may be formed from two or more otherwise identical closure elements, each with a single recessed groove at a different axial position. Another closure element has a series of ledge-like surfaces defining spaces within which a seal may be received. One outer surface surrounds one or more of the other surfaces. A seal is placed in one and only one of the spaces. As wear occurs, the seal is relocated to one of the other spaces.

Apparatus and method contemplating a high pressure fluid end assembly having a body defining a body bore and defining a recess in the body intersecting the body bore. A closure is joined to the body and forms a sealing surface. A seal is mounted to the body in the recess and configured to extend from the recess beyond the body bore to seal against the sealing surface formed by the closure.

A valve device has an outer valve casing externally fitted to an existing fluid pipe, an inner valve casing housed in the outer valve casing and an inner packing for sealing a gap between them. The inner packing includes an annular portion mounted along a periphery of an upper side surface of the inner valve casing and a plurality of U-shaped portions extending downward from the annular portion and to be mounted over an entire length from a side surface to a bottom surface of the inner valve casing. An enclosed space sandwiched between an inner surface of the outer valve casing and an outer surface of the inner valve casing is formed between the U-shaped portions that are adjacent to each other. The inner packing is provided with a connecting portion for connecting the plurality of U-shaped portions to one another.

Apparatus and method contemplating a high pressure fluid end assembly having a body defining a body bore and defining a groove in the body intersecting the body bore. A closure is joined to the body and forms a sealing surface. A seal is mounted to the body in the groove and configured to extend from the groove beyond the body bore to seal against the sealing surface formed by the closure.

According to various embodiments, a toilet system includes a toilet fill valve and a bowl fill valve that is configured to attach directly to the toilet fill valve. The toilet fill valve can include a body having an extended portion that forms a bowl fill outlet port, a water inlet configured to couple to a water source, and a tank water outlet configured to output water to a toilet tank. The bowl fill valve can include a bowl fill valve inlet port that is configured to mate directly to the bowl fill outlet port of the body of the toilet fill valve, a bowl fill valve outlet port, a protrusion configured to insert into a recess of the toilet fill valve and retain the bowl fill valve to the toilet fill valve, a slot that is configured to receive an extension of the toilet fill valve, and a water flow adjustment handle.

A closure element for a fluid end assembly that has two or more recessed grooves formed in its outer surface. The grooves are axially offset. A seal is placed in one and only one of the grooves. As wear occurs, the seal is relocated to one of the other grooves. Instead of a series of axially offset grooves in a single closure element, a kit may be formed from two or more otherwise identical closure elements, each with a single recessed groove at a different axial position. Another closure element has a series of ledge-like surfaces defining spaces within which a seal may be received. One outer surface surrounds one or more of the other surfaces. A seal is placed in one and only one of the spaces. As wear occurs, the seal is relocated to one of the other spaces.

Apparatus and method contemplating a high pressure fluid end assembly having a body defining a body bore and defining a recess in the body intersecting the body bore. A closure is joined to the body and forms a sealing surface. A seal is mounted to the body in the recess and configured to extend from the recess beyond the body bore to seal against the sealing surface formed by the closure.

A fluid end assembly comprising a housing having multiple conduits formed therein. A tubular sleeve is installed within one of the conduits and is configured to house a plurality of packing seals. A seal is installed within a groove formed in the walls of the housing surrounding the tubular sleeve such that the seal engages an outer surface of the tubular sleeve.

Apparatus and method contemplating a high pressure fluid end assembly having a body defining a body bore and defining a recess in the body intersecting the body bore. A closure is joined to the body and forms a sealing surface. A seal is mounted to the body in the recess and configured to extend from the recess beyond the body bore to seal against the sealing surface formed by the closure.

Some fluid coupling devices described herein are configured for use in fluid systems for the purpose of providing a low-spill quick disconnect. Particular embodiments of these fluid coupling devices can be configured to improve medical fluid handling equipment because the fluid coupling devices can be connected and disconnected (e.g., multiple times) while minimizing fluid spillage.