The selection principles and characteristics of Globe Valve

Globe Valve refers to a stopcock in which the closing member moves along the centerline of the seat. According to the movement form of the slice, the change of the harborage of the stopcock seat is commensurable to the stroke of the slice. Because the opening or ending stroke of the stopcock stem of this type of stopcock is fairly short, and it has a veritably dependable cut-off function, and because the change of the stopcock seat opening is commensurable to the stroke of the stopcock slice, its veritably suitable for inflow adaptation. Thus, this type of stopcock is veritably suitable for cut-off or regulation and throttling. Next, let's take a look at the selection principles and characteristics of a stainless Globe Check valve.

Here is the content list:

• Globe Valve's 7 selection principles.

• 6 characteristics of Globe Valve.

Globe Valve's 7 selection principles

1. Cast Steel Globe Valve should be used for channels or bias with high temperature and high-pressure medium. similar to thermal power shops, nuclear power shops, high temperature, and high-pressure channels in petrochemical systems.

2. On channels that don't bear strict inflow resistance. That is, where the pressure loss isn't considered much.

3. Needle faucets, instrument faucets, slice faucets, and pressure hand faucets can be used for small faucets.

4. There's inflow adaptation or pressure adaptation, but the adaptation delicacy isn't high, and the periphery of the channel is fairly small, similar to the channel with a nominal periphery of ≤ 50 mm, it should be named.

5. Small and large chemical diseases in the synthetic artificial product should use a high-pressure angle Globe Valve or high-pressure angle throttle stopcock with nominal pressure PN160 nominal pressure 16MPa or PN320 nominal pressure 32MPa.

6. In the desalinization factory and channels that are prone to coking in the product of alumina Bayer, it's easy to choose a DC Globe Valve or DC garrote stopcock with a separate stopcock body, removable stopcock seat, and hard amalgamation sealing brace.

7. For water force and heating systems in civic construction, cut-off faucets, balance faucets, or plunger faucets can be used for channels with lower nominal compasses, similar to channels with a nominal periphery of lower than 150 mm. During the opening and ending process of the Globe Check Valve, the disunion force between the slice and the sealing face of the stopcock body is lower than that of the gate stopcock, so it's wear and tear-resistant. The opening height is generally only 1/4 of the periphery of the seat channel, so it's much lower than the gate stopcock. generally, there's only one sealing face on the stopcock body and the stopcock slice, so the manufacturing process is better and it's easy to maintain.

6 characteristics of Globe Valve

1. The structure of a stop valve is simpler than that of gate valves, and it is more convenient to manufacture and maintain.

2. The sealing surface is not easy to wear and scratch and the sealing performance is good. There is no relative sliding between the valve disc and the sealing surface of the valve body when opening and closing, so the wear and scratch are not serious, the sealing performance is good, and the service life is long.

3. When opening and closing, the stroke of the disc is small, so the height of the Globe Valve is smaller than that of the gate valve, but the structural length is longer than that of the gate valve.

4. The fluid resistance is large because the medium channel in the valve body is tortuous, the fluid resistance is large, and the power consumption is large.

5. When the nominal pressure of the medium flow direction is PN≤16MPa, it generally adopts forward flow, and the medium flows upward from the bottom of the valve disc; when the nominal pressure PN≥20MPa, generally adopts reverse flow, and the medium flows downward from the top of the valve disc. To increase the performance of the seal. When in use, Globe Valve media can only flow in one direction and cannot change the flow direction.

6. When the cut-off valve is fully open, the disc is often eroded. Globe Valve's stem axis is perpendicular to the seat sealing surface. The opening or closing stroke of the valve stem is relatively short, and it has a very reliable cut-off action, making this valve suitable for cutting or regulating, and throttling the medium.

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