The Ashcroft® 400 and 401 all-welded diaphragm seals protect pressure measuring instruments. Used to ensure process compatibility, they are also applied when process media exhibit high temperature, pulsation or the potential to clog an instrument connection. An ideal selection for applications requiring minimal potential leak paths.
Process Market:
Oil and Gas
Refineries
Chemical and Petrochemical
Water and Wastewater
Process Applications:
Oil and Gas Fracking
NACE Compliant Processes (Sour Gas Separation)
Biogas and Biodiesel
Process Connection Size
1/4 to 1 NPT Male
1⁄4 to 1 1⁄2 NPT Female
Instrument Connection
¼ or ½ NPT Female
Pressure Rating
Up to 4,400 psi, 9,000 psi (OPT.)
Added Tolerance
±0.5% typical
Connection Style
400: Threaded
401: Threaded with flushing port
