| Media: | Gas, Oil, Water, Chemical |
|---|---|
| Temperature: | Low Temperature |
| Type: | Straight-through |
| Material: | Forged Steel |
| Connection Form: | Flange, Weld |
| Pressure: | High Temperature |
| Samples: |
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| Customization: |
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An electric gate valve represents a significant advancement in fluid control technology, offering automated operation and precise control over fluid flow in various industrial applications. Unlike traditional manual gate valves, which rely on manual operation through handwheels or levers, electric gate valves are equipped with electric actuators that enable remote or automatic control.
At the heart of an electric gate valve is its electric actuator, which converts electrical energy into mechanical motion to open or close the valve. This actuator can be powered by various sources, such as AC or DC electricity, and it provides the force necessary to move the gate or wedge of the valve to regulate fluid flow.
Electric gate valves are designed to provide reliable performance in demanding environments, with features tailored to meet specific application requirements. These valves are available in a range of sizes, pressure ratings, and materials to accommodate diverse industrial needs. They are commonly constructed from materials such as stainless steel, carbon steel, or bronze, chosen for their durability, corrosion resistance, and compatibility with various fluids.
One of the primary advantages of stainless steel gate valves lies in their corrosion resistance properties. Stainless steel, renowned for its resistance to rust and corrosion, ensures longevity and durability even in harsh operating conditions, making these valves suitable for a diverse range of industries and applications.
Moreover, stainless steel gate valves are available in various sizes, pressure ratings, and configurations, allowing for seamless integration into different piping systems. Whether in petrochemical plants, water treatment facilities, or industrial processes, these valves provide versatile and dependable fluid control solutions.
Electric gate valve: An electric gate valve uses an electric motor instead of a handwheel. By utilizing electrical power, the actuator spins the stem to raise or lower the gate. This allows it to be operated remotely with no user on-site but requires electrical power on-site. These are also referred to as motorized gate valves.
A gate valve operates similar to other valves. To open the valve, turn the handwheel (A), which moves the gate (G) up or down on the stem (B) via the threads. A gate valve requires more than one 360° turn to open or close the valve fully. When the gate is lifted up, it opens the inlet to the outlet allowing an unobstructed passageway for the media to flow. When the gate is lowered, it closes and blocks the media flow.
The relationship between the gate's vertical travel and the flow rate is nonlinear for a gate valve, with the greatest changes occurring near-complete closure. When used to regulate flow, the relatively high velocity of the flow at partial opening results in gate and seat wear, which along with possible vibrations of the gate, shortens the valve's service life. Therefore, a gate valve should only be used for on/off control.
Pressure seal bonnet gate valves are ideal for high-pressure applications (more than 15 MPa). Pressure seal bonnets have a downward-facing cup inserted into the valve body. When internal fluid pressure increases, the cup is forced outward, improving the seal.
The gate is raised and lowered by the spinning of a threaded stem (Figure 2 Labeled B). As discussed, a manual wheel or actuator spins the stem. Depending on the design, it is either considered a rising stem gate valve or a non-rising stem gate valve. So, as you spin the stem, it either raises or stays in place with the spin.
Outside Screw and Yoke , also referred to as rising stems, are fixed to the gate. Therefore, the threads are on the actuation side. So, as the gate is raised or lowered, the stem moves with it up and down. Consequently, they have built-in visual indicators of the state of the valve and are easily lubricated. Since they have moving components, they cannot be used with bevel gears or actuators. Therefore, rising gate valves are suitable for manual actuation.
On the other hand, a non-rising stem is fixed to the actuator and threaded into the gate. An indicator is often threaded onto the stem to show the open or closed state of the valve. Non-rising gate valves are common in underground installations and applications with limited vertical space.
| No. | Parts Name | Material |
| 1 | Body | A216 WCB |
| 2 | Seat Ring | A105+13Cr |
| 3 | Wedge | A216 WCB+13Cr |
| 4 | Stem | A182 F6 |
| 5 | Bonnet Bolt | A193 B7 |
| 6 | Bonnet Nut | A194 2H |
| 7 | Gasket | SS304+Graphite |
| 8 | Bonnet | A216 WCB |
| 9 | Bock seat bushing | A182 F6 |
| 10 | Stem packing | Graphite |
| 11 | Gland | A182 F6 |
| 12 | Gland flange | A216 WCB |
| 13 | Gland Nut | A194 2H |
| 14 | Pin | 45 |
| 15 | Gland Eyebolt | A193 B7 |
| 16 | Yoke | A216 WCB |
| 17 | Stem Nut | ZCuA110Fe3 |
| 18 | Oil Cup | |
| 19 | Bearing | |
| 20 | Retaining Nut | AISI 1035 |
| 21 | Handwheel | Ductile Iron |
| 22 | H.W.Lock Nut | AISI1035 |
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