Diaphragm Seal Manufacturing
FAHM Co. manufacture a wide range of diaphragm seals for hygienic and chemical applications. Our diaphragm seals are made to suit the pressure sensing instrument and the application. Our most common diaphragm seals are made from stainless steel grade 316L which is the standard material for the pharmaceutical industry. Using Laser Welding Machine enables us to produce the highest quality diaphragm seals.
Flanged Flush Face:
Flanged Flush-Face Diaphragm Seals are useful in applications where a continuous flow of process across the diaphragm is required to prevent solids buildup and a one-piece, all-welded construction is desired.
- One-piece Seal Design Bolts Directly to Process Flange
- Center Instrument Exit
- Commonly Supplied with Flush/Calibration Ring
- Ideal for Gauge or Differential Pressure Transmitters
Flanged Extended Diaphragm 
Extended Diaphragm Seal is ideal for highly viscous and dry powder applications. Its unique design eliminates dead space in piping. It is often used for flush mounting in thick-walled vessels and is available in standard and custom lengths.
Remote Seal Assembly to Smart Transmitters 
We specializes in the unique craft of assembling diaphragm seals to field transmitters for the purpose of measuring pressure, differential pressure, level, and flow.
Standard Fill Fluid
|
Part Number Code
|
Name
|
Description
|
Temperature Range (≥ 1 bara)
|
Viscosity cst at ~77ºF
|
Specific Gravity at ~77ºF
|
Thermal Expansion cc/cc/ºC
|
|
F1
|
Silicone DC200
|
This is the standard fill fluid for most diaphragm seal applications.
|
-40ºF to 400ºF
|
20
|
0.94
|
.00104
|
High Temperature Silicone
|
Part Number Code
|
Name
|
Description
|
Temperature Range (≥ 1 bara)
|
Viscosity cst at ~77ºF
|
Specific Gravity at ~77ºF
|
Thermal Expansion cc/cc/ºC
|
|
F2
|
Silicone DC704
|
Standard for Smart Transmitters and capillary systems. Performs well in applications with high temperature and a deep vacuum.
|
0ºF to 650ºF
|
44
|
1.07
|
.00077
|
