Alternative to this push button pneumatic valve?

[woodman-46]

Hello ,
I need to replace this push button valve on my pneumatic mount cutter as it is leaking air and I attach a photo here. It has been discontinued and the ones that are available are incredibly expensive or come from China with a long delivery time. The description it has is :
PXB-B192 Switch Contact Pneumatic Component Quick Exhaust Valve.

Can anyone suggest a push button valve that I could purchase that would do the same job?

On the other hand is it necessary to have this at all in the setup? When pushed in it stops flow of air and when pulled out it starts flow of air. At the end of the day I disconnect air supply from compressor anyway and so that in effect stops the flow and vents the system.
Any advice gratefully received
Thanks

 

[Nozzle]

Is it an emergency stop? i.e. it doesn't just stop the air, it stops AND dumps the air from machine side.

Nozzle

Edit, just seen your title does say "quick exhuast valve"

 

[bernardgreen]

Quick Exhaust Valve.

suggests this is a safety device that allows you to dump air pressure in an emergency. Such as if ( when ) you have a hand trapped in a pneumatic clamp.

Radwell may have them LINK

https://uk.rs-online.com/web/p/pneumatic-manual-control-valves/4147541 may be a suitable replacement

 

[woodman-46]

Thanks again for your responses. Unfortunately Radwell don't have them in stock. Point taken about the safety side.
Cheers
James