The gate valve distinguishes itself from ball, plug, and butterfly valves by its unique closure mechanism—a disc, gate, or obturator—which, through multiple turns of a stem or spindle, ascends from the waterway to the valve's top, known as the bonnet. These valves, opening in a straight-line motion, are termed multi-turn or linear valves, contrasting with quarter-turn valves that rotate 90 degrees without ascending.

Gate valves find extensive application across various domains and are adaptable for both surface and underground installations. ACEV gate valves offer a range of sizes and configurations, catering to general services involving water, oil, or compressed gas.

Designed exclusively for full open or full closed operations, gate valves serve as isolating valves in pipelines and are unsuitable for control or regulation. Operating a gate valve involves rotating the stem either clockwise to close (CTC) or clockwise to open (CTO). As the stem is turned, the gate moves vertically along its threaded portion.

ACEV manufactures two primary types of gate valves: parallel and wedge-shaped. Parallel gate valves feature a flat gate between two parallel seats, while wedge-shaped gate valves utilize two inclined seats and a slightly mismatched inclined gate.

A gate valve, or sluice valve, controls the flow of liquids by restricting or opening it with a round or rectangular wedge. Parallel slide gate valves utilize a flat, parallel-faced gate that fits between two parallel seats, with the knife gate valve being a variant of this type.

Wedge gate valves, named for their wedge-shaped gate, feature ribs on both sides guided by slots in the valve body. These slots serve three purposes: transferring axial loads to the valve body, enabling low-friction radial movement, and preventing wedge rotation during valve operation. The wedge-shaped gate sits on two inclined seats, with additional sealing force provided by the stem's tightening. This design ensures that the gate does not stick to the seat under high fluid differential pressure, enhancing service life due to reduced seat rubbing. However, it may result in thermal binding and restricted valve opening due to expansion.

In contrast, parallel slide gate valves use a flat gate and seats that are parallel to it. They rely on line pressure and positioning to create a tight seal, with a spring in the middle pushing the gate pieces towards the seats for enhanced sealing. Due to their design, parallel gate valves offer safety advantages in higher-temperature applications and require smaller, less expensive actuators or less manual effort due to lower closing torques. They also keep dirt away from the seating surfaces by sliding into position.

Slab gates, or through-conduit gate valves, are one-unit gates with a bore-size hole aligned with the two-seat rings in the open state, creating a smooth flow with minimal turbulence and pressure loss. This design is ideal for transporting crude oil and natural gas liquids (NGLs) while keeping the valve seats clean. However, the disc cavity can capture foreign material, so a built-in plug is typically included for maintenance purposes.

Expanding gate valves feature two slab gates that provide sealing through mechanical expansion. When lifted, both slab gate cavities allow media flow, with outward mechanical expansion ensuring a proper seal. When closed, the slab gates block media flow, and the downward force on one slab and upward force on the other allow for outward mechanical expansion, ensuring a tight seal.