Convert old 24AC pnematic solenoid valve to new 24DC solenoid valve with rectifier?

BrockSamson

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• Feb 11, 2019

• #1

I have an old piece of machinery that has a 24VAC pneumatic solenoid valve (5 port, 4 way, single with spring return and 1/2 inch inlets and outlets). I am in a hurry to get a replacement and cannot find a manufacturer that keeps them in stock.

Could I use a rectifier or converter to change the power from 24VAC to 24VDC so I can just buy a 24VDC pneumatic solenoid valve replacement?

I am new to this stuff this might be a stupid question.

 

T Gibbs

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• Feb 11, 2019

• #2

Have you looked at Automation Direct for a valve?

 

gclshortt

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• Feb 11, 2019

• #3

https://www.automationdirect.com/adc/search/search?fctype=adc.falcon.search.SearchFormCtrl&cmd=Search&searchquery=24vac+valve&categoryId=760793&TxnNumber=-1&searchqty=10&start=0#Product__F__Accessory_Type_ms=%22Pneumatic%20Valves%20%26%20Accessories%22&start=0&rows=10&Port_Quantity_s=(%20%224-Port%20(4-Way)%22)&Outlet_Port_s=%22(2)%201/4%20in%20PTC%20Tubing%22

Looks like Automation Direct has this in stock.

Yes, you could use a 24VAC coil of a relay and drive the new 24DC solenoid with the contacts of the relay with a 24VDC supply.

Regards,

 

lfe

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• Feb 11, 2019

• #4

Yes, it should work.

 

Archie

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• Feb 11, 2019

• #5

A full wave rectifier will turn the 24VAC into a "rippled" DC voltage. The RMS will be 24V, but the peak will be over 35V.

 

BrockSamson

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• Feb 11, 2019

• #6

I guess that is my only option. Thank you.

 

BrockSamson

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• Feb 11, 2019

• #7

The one they sell on automationdirect is 1/4 and I need 1/2

 

RClem

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• Feb 11, 2019

• #8

This would fit the bill at 24 VDC:
https://www.automationdirect.com/ad...d_-z-_manifold_(avs-5,am_series)/avs-5414-24d

 

BrockSamson

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• Feb 11, 2019

• #9

Thanks CLEM. I have seen that one but the problem was finding one in VDC so I guess the only option would be using a relay to drive an addition 24VDC power supply to power that particular one.

 

Jeff23spl

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• Feb 11, 2019

• #10

interface relay will make sure you don't fry anything in case the new valve need more power than the old one...Take a look in the controls, maybe it is already a relay that drive it ?