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> New parker 2/2 blocking valve 1/4NPT, pwb-A1899
New parker 2/2 blocking valve 1/4NPT, pwb-A1899
New Parker PWBA Blocking Valve 2/2
1/4npt threaded port for cylinder, 1/4npt threaded port for Airline, 5/32 tube port for pilot air
The following in from the catalog
The blocking valve is a single acting spring return 2/2 valve in a fitting format. The device requires a pneumatic pilot signal to open, which allows free flow of air, gas or liquid to pass. As long as a pilot signal is present, the device will remain open. When the pilot signal is removed, the internal spring will close the blocking valve, bubble tight. The blocking valve is oil serviceable and rated to 150 PSI. These devices have two primary design uses: (1) to prevent unwanted gravity induced motion in cylinders during shut down procedures or during periods of lost supply pressure and (2) freezing the cylinder position by using a blocking valve at each end of the cylinder. Application needs such as tool or work piece protection, horizontal indexing or inspection stops are often satisfied by this device.
Plourde Tool Box Bargins makes no representation of any item(s) sold to be fit for a particular purpose and assumes no liability for its use or misuse. It is assumed that the unit(s)
will be installed and operated by qualified personnel. The purchaser agrees that the seller shall not be held responsible or liable for any injuries or damages, whether incidental
