Diaphragm seals are used to protect the pressure measuring instrument from aggressive, adhesive, crystallising, corrosive, environmentally hazardous or toxic media. A diaphragm made of the appropriate material provides for the separation from the medium to be measured. Thus even the most difficult measuring requirements can be met by combining measuring instruments with diaphragm seals.A fluid inside the system, which can be chosen to suit the particular application, hydraulically transmits the pressure to the measuring instrument. Almost limitless application possibilities exist due to the large number of available variants, such as diaphragm seal designs or materials. The type of process connection (flange, threaded and sterile connection) and the basic method of manufacture are important design differentiation criteria. For further technical information on diaphragm seals and diaphragm seal systems see IN 00.06 "Application, operating principle, designs".

Other Details:
 

• For aggressive, hot, corrosive, environmentally hazardous or toxic media
• Process industry
• Process connection with thread to provide for direct threaded connection
• Version with internal diaphragm, diaphragm seal parts screwed together
• Large selection of process connections and materials

Specifications:
 

• Nominal pressure: PN 100 or 250
• Pressure Ranges: max. 0 ... 250 bar (max. 0 ... 100 bar for lower body with tantalum lining or PTFE foil)
• Material of upper body
• Stainless steel: 1.4404 (316L)

Material of wetted parts:
 

• Diaphragm: Stainless steel 1.4435 (316L)
• Lower body: Stainless steel 1.4404 (316L)
• Lower body (process connection)
• Threaded connection G 1/2, male (following BSPP) Sealing
• PTFE up to 260 °C

Retainer parts: 
 

• Retainer flange (stainless steel), hexagon bolts and nuts:
• Stainless steel, up to 260 °C

Level of Cleanliness of Wetted Parts:
 

• Oil and grease free per ASTM G 93-03 level E (WIKA standard) and ISO 15001 (< 550 mg/m 2)