Type 30/30H Welded, Standard & Elevated Pressure, Bolted Diaphragm Seals

Key Features

  • Utilizes an all metallic diaphragm welded to the upper housing to allow field
    replacement of the lower housing while maintaining continuity of the 
    measuring system
  • A wide variety of instrument and process connections are available
  • A flushing port is available to clean wetted areas and prevent process media 
    build up
  • 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
Click to Enlarge

Suitable pressure
gauge sizes
2-1/2", 4", 4-1/2" and 6"
Will also operate with most transducers, transmitters and pressure switches
Minimum span pressure 30: 30 psig
30H: 30 psig
Maximum working pressure 30: 2,500 psig
30H: 5,000 psig
Operating temperature Refer to fill fluid expansion factors table