Views: 0 Author: Site Editor Publish Time: 2021-09-08 Origin: Site
A check valve is a device that allows a semi-solid, liquid or gas to flow in only one direction. Check valves used in systems from residential plumbing to pharmaceutical manufacturing typically rely solely on pressure changes to manage the flow.
In this article, we will focus on check valves for fire protection, discuss how one type of check valve works, the types of check fire extinguisher valves and their benefits in fire sprinkler systems. In addition, we will help you understand what components to look for when selecting a check valve and discuss how to maintain them.
1) Why to choose our fire extinguisher valve
2) How does the fire extinguisher valve work?
3) What types of fire check valves are there and their benefits?
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Every fire sprinkler system needs a reliable source of water for immediate use in an emergency. Most fire sprinkler systems use some combination of gravity tanks, municipal water supplies and fire department connections to provide water to the sprinkler heads. But while multiple water sources provide additional reliability to a fire protection system, they can also be problematic: potable water can be contaminated by water from a fire hydrant, or dirty water from a fire sprinkler line can flow across a nearby street and into a nearby drainage ditch. A check valve for fire extinguisher valves prevents this unwanted backflow of water (called backflow) from occurring. Many fire extinguisher valve check valves have spring-loaded, articulating flaps that keep the valve closed until the water flowing from some source opens the valve. These flaps open in only one direction: when these flaps reverse their flow (or almost stop), the spring presses the flap against the rubber seat, creating a watertight seal. The water on either side of the valve flap can be thought of as the water supply side (between the water source and the check valve) and the system side (between the check valve and the rest of the system). When the fire sprinkler head is discharged, the water is released, thereby reducing the pressure on the system side. Shortly thereafter, the higher pressure generated by the water stored or pumped from the supply side pushes the valve flap open and water flows through the system.
There are four main types of fire check valves.
Alarm check valves
Swing-open check valve
Grooved check valve
Shotgun trench check valve
Alarm check valves consist of a spring, a flap and an alarm port. The alarm port can be used to direct water to a water motor alarm or alarm pressure switch to warn nearby personnel that the system has been activated or to send a signal to the fire alarm control panel.
A rotary check valve can act as an alarm check valve for a wet pipe fire sprinkler system, provided the valve can sound an alarm.
This is the information collected by the editor about the fire extinguisher valve. If you are interested in a fire extinguisher valve, you can browse our product detail page or contact us. We are always here to help you.