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jade
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Join Date: May 2010
Posts: 1

ARC Valve

05/19/2010 11:13 PM

is there anyone that can give me a detailed function of an ARC valve on boiler feed water pump and the specific action done....
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lyn
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Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: ARC Valve

05/19/2010 11:42 PM
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Codemaster
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Join Date: Jul 2005
Location: Stoke-on-Trent, UK
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#2
In reply to #1

Re: ARC Valve

05/20/2010 5:12 AM

Hello Lyn

What's the valve doing? Is it for minimum boiler return temperature control? for avoidance of condensation/corrosion in the boiler.

Cheers...........Codey

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lyn
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Join Date: Oct 2008
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#3
In reply to #2

Re: ARC Valve

05/20/2010 6:33 AM

Pump protection.

From the Tyco website:

Control Valves

7100 ARC Valve for Centrifugal Pump Protection

The 7100 Series ARC provides the most economical and reliable system to protect pumps from the dangers of low and/or reverse flow. It combines the functions of a check valve, flow sensing device, minimum flow control and pressure letdown into a single valve.

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klearzen
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Join Date: Jun 2010
Location: St Louis MO USA
Posts: 224
Good Answers: 7
#4

Re: ARC Valve

07/18/2010 12:13 PM

L.L. did a good job in showing you the mechanics of the ARC valve.

Are you cognizant of the need to recirculate when pumping hot water with a centrifugal -force type pump?

You can pump a hot liquid with a centrifugal force.... if and when you reach a no flow or low flow condition that will create a vapor pressure situation that can and will cavitate the pump …. you cant pump a vapor with centrifugal force. The ARC valve prevents a no flow condition.

You can still get in trouble if you over temp the feed tank. So daily monitoring is essential.

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Codemaster (1); klearzen (1); lyn (2)

Previous in Forum: Quick Release Mechanism Must Withstand 50,000 lbs When Fastened   Next in Forum: NDT for SS pipes
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