1. Ashcroft 102-103 Flanged Diaphragm Seals
The Ashcroft® type 102 and 103 flanged diaphragm seals or isolation devices protect pressure measuring instruments. Used when process compatibility is required, these are also applied when media exhibits high temperature or the potential to clog an instrument connection. Ideal for satisfying many challenging applications.
Key Features:
- Wide selection of diaphragm and lower housing materials
- Diaphragm threaded to top housing
- Flush port (type 103) provides easy cleaning / flushing due to process media prone to clogging
Specifications:
- Style:
Type 102: flanged
Type 103: flanged with flushing port - Process size: 1/2″ to 3″
- Flange rating: 150, 300, 600, 900 & 1,500 class
The type 102/103 diaphragm seals are ideal where process protection is essential:
Process Market:
- Oil and Gas
- Refineries
- Chemical and Petrochemical
- Water and Wastewater
Process Applications:
- Oil and Gas Fracking
- NACE Compliant Processes (Sour Gas Separation)
- Biogas and Biodiesel
2. Ashcroft DF Flush Flanged Diaphragm Seal
The Ashcroft® DF flush flanged diaphragm seal uses a diaphragm welded directly to the assembly flange, eliminating much of the cost associated with bulky lower housings made from exotic and expensive wetted materials. The flush-mounted diaphragm prevents clogging and is available in a full range of metallic and coated materials.
Key Features:
- Flush design minimizes the use of expensive specialty wetted materials
- Flush-mounted diaphragm prevents clogging of process media
Specifications:
- Style: DF (flush)
- Process size: 1″ to 4″ flanged
- Flange Rating: 150RF to 2500RF
The DF flush flanged diaphragm seals are ideal where process protection is essential:
Process Market
- Oil and Gas
- Refineries
- Chemical and Petrochemical
- Water and Wastewater
Process Applications
- Oil and Gas Fracking
- NACE Compliant Processes
- Biogas and Diesel
3. Ashcroft 106 In-Line Flanged Diaphragm Seals
The Ashcroft® 106 in-line flanged diaphragm seal or isolation device protects pressure measuring instruments. Mounted in-line to the process piping, it is used on applications where continuous flow prevents process clogging or accumulation, while preventing process fluid loss in the event the measuring instrument is removed or fails. An ideal choice for satisfying challenging installation requirements.
Key Features:
- Wide selection of diaphragm and lower housing materials
- Diaphragm threaded to top housing
Specifications:
- Process size: 1/2″ to 8″
- Flange rating: 150 class
The 106 in-line flanged diaphragm seals are ideal where process protection is essential:
Process Market:
- Oil and Gas
- Refineries
- Chemical and Petrochemical
- Water and Wastewater
Process Applications:
- Oil and Gas Transportation-Pipelines
- Biogas and Biodiesel
4. Ashcroft 402-403 Flanged All-Weld Diaphragm Seals
The Ashcroft® 402 and 403 flanged all-weld diaphragm seals or isolation devices protect pressure measuring instruments. Used to ensure process compatibility, they are also applied when process media exhibits high temperature, pulsation or the potential to clog an instrument connection. An ideal selection for applications needing added product integrity.
Key Features:
- Wide selection of diaphragm and lower housing materials
- All welded construction
- Flushing port (type 103) provides easy cleaning / flushing due to process media prone to clogging
Specifications:
- Style:
Type 402: flange
Type 403: flange with flushing port - Process size: 1/2″ to 3″
- Flange rating: 150 to 1500 class
The 402 and 403 flanged all-weld diaphragm seals are ideal where fugitive emission and hazardous process protection are essential:
Process Market:
- Oil and Gas
- Refineries
- Chemical and Petrochemical
- Water and Wastewater
Process Applications:
- Oil and Gas Fracking
- NACE Compliant Processes (Sour Gas Separation)
- Biogas and Biodiesel
5. Ashcroft 702-703 Flanged High Displacement Diaphragm Seals
The Ashcroft® 702 and 703 high-displacement diaphragm seals or isolation devices are used with low pressure or differential pressure gauges with low differential pressure and elevated static pressure. Used to ensure material compatibility, they are also applied when process media exhibits high temperature, pulsation or the potential to clog an instrument connection. An ideal product for satisfying low pressure measurement needs.
Key Features:
- Wide selection of diaphragm and lower housing materials
- Enlarged welded diaphragm; high displacement allows high sensitivity to pressure fluctuations
- Flushing port (type 703) provides easy cleaning / flushing due to process media prone to clogging
Specifications:
- Style:
Type 702: raised face flange
Type 703: raised face flange with flushing port - Process size: 1/2″ to 3″
- Flange rating: 150 and 300 class
The 702 and 703 diaphragm seals are ideal where low volume measurement and process protection are essential:
Process Market:
- Oil and Gas
- Refineries
- Chemical and Petrochemical
- Water and Wastewater
Process Applications:
- Oil and Gas Racking
- NACE Compliant Processes (Sour Gas Separation)
- Bioassay and Biocides