What is Check Valve? Can anyone tell me about the uses of different kinds of check Valves like "Stainless Steel Check Valve"?

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  • 4 weeks ago

    Yes it is true a check valve allows fluid or air one way, check valves can be many feet across or small as a pencil. Ironically a diode does the same thing with small currents of electricity ofcourse in electronics. Stainless check valves work well in hydraulics and  most stainless doesn't rust, sometimes the shell is made out of cast steel and the check ball is plastic or copper coated to prevent rust. The flapper in your toilet flush box is a check valve you can see how it works. Some check valves have a valve seat and are very tight when closed and others do a mediocre job. Sometimes a valve can  be heard to clatter in pipes if the pressure is up and down. Some check valves are spring loaded and others rely on a  weight of the clapper. One use might be on your hot water heat to keep the hot steam moving from the heater to the return line. Hope that helps.l  Grampa B

  • 4 weeks ago

    Sump Pumps have a check valve so the water going up the discharge pipe does not flow back down into the sump. Water pressure opens it and then a spring causes it to close after the pump stops. 

  • 4 weeks ago

    A check valve is a one-way valve.  It only permits the water (or air, or whatever) to flow in one direction.  Stainless steel isn't a kind of check valve, it's the material it's made of.

    You know that flappy air vent that lets warm air from the clothes dryer out of the house but closes when the dryer isn't running?  That's a really simple check valve.

  • bill
    Lv 4
    4 weeks ago

    Check vvs are used in all sorts of things like aquarium air pumps,in basements to stop water coming up from drains,in d/c lines from all kinds of pumps, in discharges from air blowers.

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  • Edwena
    Lv 7
    4 weeks ago

    A check valve has a feature that automatically prevents backflow.  Typically it is a swinging gate "clapper" that opens with flow in one direction and swings closed against a seat in the valve body with flow in the other direction.  There are many different designs and materials for check valves. Stainless steel is material that the check valve is made out of.  Stainless steel is expensive and is typically used in the food processing, chemical and instrumentation processes where high quality and non-corrosive materials are necessary.  As opposed to water that would typically be bronze or oil and gas that would typically be steel.  Since stainless steel is expensive, the valves are usually smaller.  Smaller stainless steel check valves often use a "spring loaded ball" inside the valve to act as the closing device.  The spring pushes the ball close on backflow and allows the valve to open on a set pressure by controlling the strength of the spring.  A common check valve is the Schrader valve in the tires on you car.  Inside the valve stem is a small check valve.  It allows you to put air in the tire and then closes so that the air does not come out.  There is a little spring in a Schrader valve

  • Anonymous
    4 weeks ago

    They are also known as non-return valves; they only allow water or gas or whatever to flow one way.  If the pressure drops upstream of the valve it will close. They are totally automatic. Useful for preventing contamination between hot and cold supplies when they are mixed travelling back along the pipework.

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