| Medien: | Gas, Oil, Water, Chemical |
|---|---|
| Temperatur: | Niedrige Temperatur |
| Art: | Straight-Through- |
| Material: | Forged Steel |
| Verbindungsformular: | Flange, Weld |
| Druck: | Hochtemperatur- |
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The opening and closing parts of gate valve are rams, whose movement direction is perpendicular to the direction of fluid. Gate valves can only be fully opened and closed, and cannot be adjusted or throttled.
The opening and closing parts of forged steel gate valves are rams, whose movement direction is perpendicular to the fluid direction. Forged steel gate valves can only be fully opened and closed, and cannot be adjusted and throttled. The gate of forged steel gate valve has two sealing surfaces, and the two sealing surfaces of the most commonly used mode gate valve form a wedge shape, and the wedge angle varies with the valve parameters. The driving modes of forged steel gate valve are: manual, pneumatic, electric and gas-liquid linkage. Gate valves are divided into cast iron gate valves, ductile iron gate valves, stainless steel gate valves, forged steel gate valves, etc.
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.
| Manufacture Standard Of Gate Valve | API 600 ASME B16.34 / KS B2361 / GB/T 12234 / DIN 3352 |
| Valve Connection | Flanged |
| Connection Type | ANSI, JIS, DIN, GB |
| Valve Material | CF8, CF8M, WCB |
| Power Supply | General: 3-phase 380VAC
Special: 3-phase AC660V, AC440V, AC415V Special: 1-phase AC220V, AC110V Special: DC12V, DC24V, DC48V |
| Torque Range | 50Nm to 10,000Nm |
| Protection Class | IP65 |
| Insulation Class | F Class |
| Ambient Temperature | -4°F to 140°F |
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