Type 20 Welded, Front Flush Diaphragm Seals

Key Features

  • Designed for applications requiring an NPT male threaded process connection
    and with a flush diaphragm
  • Flush diaphragm construction prevents clogging and process material build-up
  • Constructed with a 316 stainless steel housing and diaphragm for strength and 
  • Maximum pressure rating is 9,000 psi
  • Available instrument connection sizes are 1/4" and 1/2" with a process connection
    size of 1/2" NPT male to 2" NPT male
  • Consider gauge size, pressure range, media composition, ambient and operating temperature, and maximum working pressure when selecting
  • For process temperatures over 212 °F a capillary or cooling element is recommended,
    contact factory to order
  • Fill fluid must be compatible with process media; i.e. glycerine may become volatile
    in conjunction with a strong oxidizing agent such as chlorine, forms of oxygen or
    peroxide and nitric acids 
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Suitable pressure gauge sizes Will also operate with most transducers, transmitters and pressure switches
Minimum pressure span 1/2" NPT: 1,500 psig
3/4" NPT and above: 160 psig
Maximum working pressure 9,000 psig
Operating temperature Refer to fill fluid expansion factors table