The importance of ball check valves in pipeline systems

Protecting critical equipment:
Pump: This is one of the main functions. When a pump stops running (especially a centrifugal pump), without a check valve, the medium in the pipeline will flow in the opposite direction under the action of gravity or system pressure difference, impacting the impeller of the pump and causing it to reverse. This not only damages the mechanical seal, bearings, and impeller of the pump, but may also cause damage to the motor (if started in reverse). Spherical check valves can quickly close, preventing this reverse flow and protecting the pump from damage.
Compressor: Similar to the principle of a pump, it prevents gas backflow from causing the compressor to reverse or surge.
Instrumentation: Prevent reverse pressure impact from damaging precision instruments such as flow meters, pressure gauges, control valves, etc.
Prevent media mixing or contamination:
In complex pipeline systems, different branches may transport different media (such as different chemicals, clean water and wastewater, drinking water and non drinking water, hot fluid and cold fluid, etc.). Check valves can effectively prevent the backflow of media from one pipeline to another, avoiding cross contamination, chemical reactions, and even the production of hazardous substances, ensuring process purity and product quality.
Prevent the backflow of sewage and wastewater from polluting a clean water supply system.
Maintain system pressure and flow stability:
Preventing medium backflow helps maintain pressure stability downstream of the pipeline system.
In a system with multiple pumps in parallel, if one pump stops working, a check valve can prevent the medium output from the running pump from flowing back into the stopped pump and its inlet pipeline, thereby ensuring the effective output flow rate and pressure of the running pump.
Reduce water hammer effect:
Although check valves themselves cannot completely eliminate water hammer (pressure wave impact caused by sudden changes in fluid momentum), quickly closing check valves (such as well-designed spherical check valves, especially those with spring assistance) can quickly cut off the backflow medium, effectively limit the length of the backflow water column, and significantly reduce the energy of water hammer shock waves caused by backflow, reducing their destructive force on pipelines, valves, and fittings. In contrast, slowly closing check valves may lead to more severe backflow and water hammer. The rapid response characteristics of spherical valves have advantages in this regard.
Prevent siphon backflow:
In a system where the medium is transported from a higher storage tank or equipment to a lower position through a pipeline, if the liquid level at the outlet is lower when the transportation is stopped, a siphon effect may be formed to suck out the medium from the high-level container. The check valve installed at the outlet end of the high-level container can prevent this unexpected backflow.
Energy saving:
Preventing backflow means that the pump or compressor does not need to do extra work to rebuild the pressure and flow that were damaged by backflow, thereby saving energy consumption.

sale@cnbestvalve.com     WhatsApp: +8613333075295