Best Answer

a check valve permits fluid flow in one direction, but blocks flow in the opposite direction. works as a vent, as overpressure or backpressure protection, or as an aid to a reprocationg pump or a cycling pump or servo-driven pistol. The pressure valve on a water heater allows excess hot water to escape to an outside location instead of in the house where it is located.

Simplified, it lets gas (air) or liquid go one way, but not the other. The valves of your heart are a good example of this.

User Avatar

Wiki User

โˆ™ 2015-07-17 17:53:01
This answer is:
User Avatar

Add your answer:

Earn +5 pts
Q: What are check valves and what are they primarily for?
Write your answer...

Related Questions

Is there a difference between liquid check valves and gas check valves?


What is the SIC for fluid power valves?

Establishments primarily engaged in manufacturing fluid power valves are classified in SIC 3492: Fluid Power Valves and Hose Fittings

Can you find out if your pistons hit your valves when the timing belt snaps or do you have to put new timing belt on first?

You can do a cylinder leakage test to check for bent valves.You can do a cylinder leakage test to check for bent valves.

What is SIC 3491?

This category covers establishments primarily engaged in manufacturing industrial valves.

Distortion is a technique used primarily in what period?

Distortion was primarily used during the 1960s to the 1970s. Distortion was primarily created by over-driving the power valves on solid wood electric guitars.

Where do you get hho check valves?

The related link advertises them.

How do you check for bent valves on 2000 Daewoo leganza?

do a compression check on each cyl.

Why do an endocardiogram?

To check for problems regarding the heart chambers and valves

How do you check the valves on a 1987 Caprice 305 V8 that jumped time?

If you are worried about bent valves DON'T That year engine will not bend the valves when the timing chain goes bad.

What causes heart sounds?

Heart sounds are created primarily from turbulence in blood flow created by the closures of the valves.

Mazda 626 4-cylinder overdrive jumping on off what can I check?


What are signs of a belt jumping time on a 2003 Chrysler Sebring?

Check engine light, low power, no start, runs rough, bent valves,Check engine light, low power, no start, runs rough, bent valves,

What will make a yz 85 have a rattling nose?

check the spit valves

How do you check for bad valves Chevy Malibu v6?

Compression test

Why is it hard to blow in your trumpet?

you may have something in the horn, or the valves are in wrong. clean the trumpet, and check the valves, and if that doesn't work go to a professional

What is SIC 3494?

This category includes establishments primarily engaged in manufacturing metal valves and pipe fittings, not elsewhere classified, such as plumbing and heating valves, and pipe fittings, flanges, and unions, except from purchased pipes.

Is check valve and ball valve same?

No Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of application. And a ball check valve is one of types of check valves, it a check valve in which the closing member, the movable part to block the flow, is a spherical ball. Then a ball valve is a valve with a spherical disc, the part of the valve which controls the flow through it. The sphere has a hole, or port, through the middle so that when the port is in line with both ends of the valve, flow will occur. As you see, they are not the same.

How many check valves are used in the paint system for a paint striper?


Why are the openings of auricles and ventricles guarded by valves?

to check the back flow of blood:-)

What is air system bank 2 on a 2000 Chevrolet Silverado?

Check your connections and the air injection check valves. -Jager

How check valves works in chilled water piping?

Same as in hot or tempered installations

Where can one purchase plastic check valves?

Plastic check valves can be purchased from most hardware stores such as Bunnings or Lowes. Alternatively, they might also be purchased online from large retailers such as Amazon or bought second-hand through eBay.

99 Daewoo leganza wont start after replacing valves?

have the valves been lapped in properly,do a compression check,make sure valve timing is correctly set.

If the valves on a car aren't bent then would the car still fail a pressure check on the valves after timing belt snapped?

Timing marks are not lined up correctly.

What is the purpose of valves in blood vessels?

Valves are primarily found in veins. They are important because when blood is returning to the heart from places like the feet, they are moving against gravity. In order to prevent the blood from falling down to the feet as it rises back to the heart, valves are in place in order to prevent the blood from flowing backward.