Features
- All-welded metal construction
- No gaskets or bolts
- 2.5 & 3.5in gauges from 15 to 1000 psi
- 4.5in gauges from 30 to 1000 psi
- Top housing material 316L stainless steel standard
- Diaphragm materials:
- 316L stainless steel
- Hastelloy C
- Tantalum
- 1/4 NPT or 1/2 NPT instrument connections
The Ashcroft Type 311 / 312 diaphragm seal is compact in size to fit into space restricted areas. It is designed to protect transducers, mini-switches, and pressure gauges with 3.5 inch or smaller dial sizes from corrosion, plugging or freeze-up. The all-welded metal construction prevents process media leakage. It is rated for 2500 psi at 100°F and has a 316L stainless steel top housing standard. Lower housing materials include 316L stainless steel or Hastelloy C. Diaphragm materials include 316L stainless, Hastelloy C, or Tantalum. 1/4, 1/2, 3/4 or 1 NPT process connection sizes are available and the instrument connection is 1/4 or 1/2 NPT.
