740-741 High-Displacement Diaphragm Seals

740-741 High-Displacement Diaphragm Seals

The Ashcroft® 740 and 741 high-displacement diaphragm seals or isolation devices are used with low-ranged instruments or high static pressure dp gauges with low differential pressure.
The Ashcroft® 740 and 741 high-displacement diaphragm seals are used with low-ranged instruments or high static pressure differential pressure gauges with low differential pressure. Used to ensure material compatibility, they are also applied when process media exhibit pulsation or the potential to clog an instrument connection. An ideal product for satisfying low pressure measurement needs.

Key Features

Flush port (optional) provides easy cleaning / flushing for process media prone to clogging

Enlarged welded diaphragm; high displacement allows high sensitivity to pressure fluctuations

Selection of wetted materials

Material certificates to EN 10204:2004 3.1

Markets & Applications

Water and Wastewater

Chemical and Petrochemical

Oil and Gas

Refinery

NACE Compliant Processes (Sour Gas Separation)

  • Specifications
  • Downloads

Pressure Rating

50 bar / 750 psi

Case or Body Material

Stainless steel 316L (1.4404)

Process Connection Style

Threaded

Threaded with flushing port

Accuracy

Added Tolerance ±0.5% typical

Instrument Connection Style

Welded

Threaded

Wetted Parts Material

Stainless steel 316L (1.4404)

Tantalum

Monel

Hastelloy C

Hastelloy B

Titanium

Carpenter 20 (2.4660)

Data Sheets
Installation + Maintenance
Selection Guides
Product + Technical Information
Drawings + Models
Safety Data Sheets

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