Globe check valve (or globe check valve) is an integrated globe valve and check valve function of the composite valve, its core features and working principle are as follows:
- First, the definition and functional combination
Functional integration: both the mandatory sealing cut-off function of the globe valve and the automatic anti-backflow characteristics of the check valve.
Structural features: non-fixed connection of the valve stem and valve flap, through the valve stem lift to achieve the switching of the two modes of operation.
- Second, the working mode and principle
Shut-off valve mode
Operation mode: when the valve stem is lowered, the valve flap and the valve seat are pressed closely together, blocking the medium flow, at this time, the closing pressure needs to be applied manually.
Applicable scenes: need to cut off or regulate the flow of occasions accurately.
Check valve mode
Automatic opening and closing: after the valve stem rises, the valve depends on the medium flow pressure or self-weight to achieve automatic opening and closing, to prevent the medium from flowing backwards.
Anti-backflow protection: applicable to the pump outlet, container outlet and other piping systems that need to avoid reverse flow of media.
- Third, the technical advantages
Space and economy: single valve instead of the combination of globe valve + check valve, reduce installation costs and save space, especially for ships and other space-constrained scenes.
Reliability of sealing: The forced sealing in shut-off mode ensures high tightness, and the sealing effect is enhanced by medium pressure in check mode.
- Typical application areas
Industrial systems: chemical, petroleum, electric power and other fields in need of double control of the pipeline (such as pump outlet pipeline).
Special environment: ship piping system and other places that require high compactness of equipment.
In summary, the shut-off check valve through structural innovation to achieve multi-functional integration, in complex working conditions to simplify the pipeline layout and enhance the reliability of the system.
