402-403 Flanged All-Welded Diaphragm Seals
Quantity
The Ashcroft® 402 and 403 flanged all-weld 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.
Key Features:
- Wide selection of diaphragm and lower housing materials
- All welded construction
- Flushing port (type 403) provides easy cleaning / flushing due to process media prone to clogging
Applications:
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
½, ¾, 1, 1½, 2 or 3 NPS
Instrument Connection
¼ or ½ NPT Female
Added Tolerance
±0.5% typical
Connection Style
402: Flanged
403: Flanged with flushing port
Flange
150, 300, 600, 900 & 1,500 class
Flange Ratings (MAWP)
Per ASME B16.5
