Instrumentation Diaphragm Seal

Screwed Diaphragm Seals are threaded-type pressure isolation devices designed to protect pressure instruments from corrosive, viscous, or high-temperature process media. They consist of a flexible diaphragm welded to a threaded body, which isolates the measuring instrument from direct contact with the process fluid. Pressure is transmitted through a fill fluid to the gauge or transmitter, ensuring accurate readings while preventing damage, clogging, or contamination.

These seals are compact, easy to install, and widely used where threaded connections are preferred over flanged types. Manufactured from high-quality materials such as SS 316, SS 316L, Hastelloy, or PTFE-lined constructions, they offer excellent corrosion resistance and durability in harsh environments. Screwed diaphragm seals are ideal for applications requiring reliable pressure measurement in limited space.

Technical Details:

• Product Type: Screwed Diaphragm Seal
• Material: SS 316 / SS 316L / Hastelloy / Monel / PTFE Lined
• Connection Type: Threaded (Male / Female)
• Thread Type: BSP / NPT / BSPT
• Size Range: 1/4 to 2
• Diaphragm Type: Welded / Flush Type
• Fill Fluid: Silicone Oil / Glycerin / Fluorinated Fluid
• Pressure Range: Vacuum to High Pressure
• Temperature Range: -40C to 300C
• Mounting: Direct Mount / Capillary Type