Home >> YUANDA Valve
Check valves prevent reverse flow of fluids and gases within a pipeline system. They are designed to allow fluid to flow one way through the pipeline. Due to the simple design, check valves generally operate without automation or human interaction and instead rely on the flow velocity of the fluid to open and close. You can learn more in our complete check valves guide.
How do they work?
Check valves are flow sensitive and rely on the line fluid to open and close. The internal disc allows flow to pass forward, which opens the valve. The disc begins closing the valve as forward flow decreases or is reversed, depends on the design. Construction is normally simple with only a few components such as the body, seat, disc and cover.
Check Valve types
There are several types of check valves for just about any application. Some of the more popular types include:
● Ball
● Dual plate
● Double door
● Spring assisted inline
● Nozzle
● Piston or lift
● swing checks
As with other types of valves, speciality check valves can be found for special applications.
Check valves are found in just about any type of facility from industrial plants and homes.
How much do check valves cost?
Depending on the size of the system and how much it costs, most homeowners pay between $135 and $1,000. The device costs between $35 and $600, while labor costs between $100 and $400. You can expect to pay between $70 and $250 for a back water or check valve.
What is a check valve used for?
The main purpose of a check valve is to prevent backflow in the system. Figure 1 shows an example of a check valve. A check valve relies on a pressure differential to work. They require a higher pressure on the input side of the valve than the output side to open the valve.
How often should a check valve be replaced?
While typical component lifespans are application specific, manufacturers suggest metal and plastic check valves should be replace every 5-7 years whereas check valves manufactured from rubber may remain fully serviceable for up to 35-50 years.
Do I need a check valve?
Do I need a check valve? A check valve is a valve that is used to prevent backflow in a piping system. ... Even if a pump does have a built-in check valve, we recommend that a check valve be installed in the discharge line within 25 feet of the pump and below the draw down level of the water supply.
Contact US
Related Information
what is the function of a globe valveCast Iron Dual Plate Check Valveglobe valve flow controlhow does a gate valve workwhat is a brass ball valvehow to fix a leaking gate valve3 butterfly valveWhere are valves usedwhat is a gate valve used fortriple offset butterfly valveMarine Gate Valve Manufacturerslug butterfly valveball valve life expectancyForged steel valvesball valve advantages and disadvantagesglobe valve diagram3/4 ball valve stainless steel3/4 ball valve for air compressorgate valve manufacturersglobe valve direction of flowChina Check Valve Supplier1 inch brass ball valve priceCast iron valvehow a gate valve works6 Inch Cast Iron Check ValveCast Check Valve3/4 plastic ball valvehigh pressure gate valves manufacturergate valve factoryKeystone Butterfly Valvehow does a 3 way mixing globe valve worktypes of ball valves in plumbing1/4 ball valve plasticball valve corrosionwhere to place globe valve on an irrigation system6 butterfly valve5 inch pvc ball valveBall valve selection guideglobe valve partshow to disaseble a globe valve12 Inch Check Valvehigh performance butterfly valveWhere is pressure relief valve usedball valve specificationCast Iron Lift Check Valve