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Parker stainless steel air controlled bellows valve
Great Price on Very Expensive Bellows Valve
You are purchasing a PARKER part number 4Z-P4K-11AC-SS Precision Stainless Steel Air Controlled Bellows Valve. Parker also refers to this as a 44900320 series valve.
The valve is made of 316L stainless steel and rated for vacuum to 200 psi pressure. It is normally closed and is operated with low pressure pneumatic pressure. The valve appears to be new, but it is not in factory packaging.
Factory specs are available on line at the PARKER BELLOWS VALVE web site.