What are the overlaps between manual gate valves and globe valves in application scenarios?

2025-04-18 09:33:23

The overlap between Manual gate valves and Globe valves in application scenarios is mainly reflected in the interception control of fluids and some common scenarios under moderate working conditions, as follows:

1. Universality of fluid cutoff function

The opening and closing control of pipeline systems: Both can serve as "on-off valves" in pipeline systems, used to fully open or close fluids (such as water, steam, oil, gas, etc.) and prevent the flow of media.

Typical scenarios: daily maintenance and isolation of pipelines, opening and closing of branches, system start and stop, etc.

Non frequent adjustment cutoff scenario: Although globe valves are more suitable for regulating flow, both Gate valves and globe valves can be used in situations where only "on/off" is needed without fine adjustment (such as temporary cutoff, backup pipeline switching).

2. Applicability of medium pressure and temperature conditions

Conventional industrial pipelines: Under moderate pressure (such as PN16~PN40) and temperature (≤ 400 ℃) conditions, both can meet the requirements for sealing and structural strength, commonly found in:

Building water supply and drainage system (water, condensate).

HVAC system (steam, cooling water).

Light industry pipelines (such as clean fluids in the food and pharmaceutical industries).

Common scenarios in non harsh environments: For non high temperature and high pressure, non corrosive or low corrosive media (such as air, low-pressure gas), both materials and structures can be adapted.

3. Scenarios requiring manual operation

Systems that do not require automation: In scenarios that rely on manual operation (such as manual switches, on-site adjustments) and do not have strict requirements for response speed, both can be opened and closed through a handwheel or handle, for example:

Small industrial installations and civilian pipelines.

Remote areas or pipelines with low maintenance frequency (such as irrigation systems, fire pipelines).

4. Cross application in specific industries

Chemical and petroleum industries: In some non critical pipelines (such as bypass pipes and sewage pipes), both can be used to cut off the medium, rather than precise control of the main process.

Power system: In low-pressure steam pipelines and cooling water circulation systems, the two can be used alternately as shut-off valves (attention should be paid to the pressure drop effect of shut-off valves).

Ship and Ocean Engineering: In bilge water and ballast water systems, both can be used for on/off control of pipelines, balancing sealing and operational convenience.

5. Scenarios with moderate requirements for sealing performance

Non strict sealing cutoff requirements: Both have basic sealing capabilities (gate valves rely on the fit between the valve disc and the valve seat, while globe valves rely on the flat sealing between the valve disc and the valve seat), and can meet the usage requirements under normal working conditions without zero leakage (such as low-pressure water systems).

Non overlapping scenarios caused by differences (supplementary explanation)

Adjustment function: The globe valve can finely adjust the flow rate by lifting and lowering the valve disc, while the gate valve is only suitable for fully open/fully closed and cannot be adjusted (forced adjustment will cause wear on the sealing surface).

Fluid resistance: When the gate valve is fully opened, the resistance is small (straight through flow channel), suitable for high flow and low pressure drop scenarios; The shut-off valve has high resistance (flow channel turning), making it more suitable for small diameters or situations that require throttling.

High pressure/high temperature/corrosive working conditions: Gate valves have more stable sealing performance under high pressure, while globe valves may be affected by valve stem deformation under high temperature and high pressure, and the selection should be based on specific design.

summarize

The overlapping scenarios of manual gate valves and globe valves mainly focus on "medium operating conditions with cutoff function as the main function and low requirements for regulation and pressure drop", and the choice of the two depends more on specific details such as flow characteristics, installation space, and cost. In practical applications, it is necessary to make a comprehensive judgment based on factors such as medium characteristics, pressure and temperature parameters, and operating frequency.