311-312 Midi-Diaphragm Seals

The Ashcroft^® 311 and 312 midi-diaphragm seals or isolation devices are used in confined areas to protect measuring instruments. Used to ensure process compatibility, they are also applied when process media exhibits high temperature and pulsation. This model is ideal with limited space installations.

Key Features:

• Compact and lightweight design
• Choice diaphragm and lower housing materials
• All-welded construction
• Volumetric displacement allows attachment to:
  63 mm and 3 1/2" gauges (0 ... 4 bar to 0 ... 60 bar)
  100 mm and 4 1/2" gauges (0 ... 7 bar to 0 ... 60 bar)
  Transducers and switches
  
• Rated up to 70 bar

Specifications:

• Style:
  Type 311: threaded
  Type 312: threaded with flushing port
• Process size:
  Type 311: 1/4" to 1/2" NPT male; 1/4" to 1" NPT female, 1/2" to 1 1/2" R/BSPT/JIS male
  Type 312: 1/4" and 1/2" NPT female