Diaphragm Seals

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Home | Diaphragm Seals | Non-Replaceable | Type 25/25H Standard & Elevated Pressure

 

Type 25/25H Standard & Elevated Pressure, Non-Replaceable Diaphragm Seals

 

 

  • Designed to isolate the pressure measuring instrument from
    corrosive or viscous process media
  • Utilize an all welded, all metallic housing design to eliminate
    potential leak paths
  • For use with gauges with dial sizes of 2-1/2" and smaller, and pressure
    ranges no less than 100 psig
  • Housing and diaphragm offered in a variety of materials to suit most applications
  • A flushing port is available to clean wetted areas and prevent process
    media build up
  • Consider instrument size, pressure range, media composition, ambient and
    operating temperature, and maximum working pressure when selecting
  • Capillaries and cooling elements are available for elevated process temperatures,
    see accessories
  • Fill fluid must be compatible with process media; i.e. Glycerin may become
    volatile in conjunction with a strong oxidizing agent such as chlorine, forms of
    oxygen or peroxide and nitric acids
Tech Manual 

 

ORDERING INFORMATION

TYPES 25 (2,500 psi) 25H (5,000 psi)    
INSTRUMENT CONNECTION SIZES 02 1/4" NPT 04 1/2" NPT    
UPPER HOUSING MATERIALS M Monel 400 P Carpenter 20 S 316 Stainless steel
DIAPHRAGM MATERIALS H Hastelloy C-276 P Carpenter 201    
M Monel 4001 S 316 Stainless steel    
PROCESS CONNECTION SIZES 02 1/4" NPT 04 1/2" NPT    
LOWER HOUSING MATERIALS H Hastelloy C-276 P Carpenter 20    
M Monel 400 S 316 Stainless steel    
FLUSHING CONNECTIONS 1F 1/8" NPT 2F 1/4" NPT    

    NOTE: For process temperature over 212 °F, a capillary or cooling element is recommended. Contact NOSHOK factory to order.
    1 When selecting a Monel or Carpenter 20 Diaphragm, the upper and lower housing must be the same material.

 

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