Diaphragm Seals & Capillaries

A direct connection or capillary is used to connect the measuring instrument to the diaphragm seal. Capillaries are helpful for remotely mounting instruments. Fortunately, to help you find the best diaphragm seals and capillaries for your applications, Haygor supplies a broad range of options from the top manufacturers in the world.

Build your diaphragm seal here.

WHY USE DIAPHRAGM SEAL SYSTEMS?

In short, diaphragm seal systems offer protection to guarantee reliability and safety. They protect gauges from contaminated, hot, corrosive, or viscous materials. To prevent gauge failure that can cause safety problems for personnel and operations, diaphragm seals offer an added layer of protection to make sure the media does not reach the gauge.

Diaphragm seals also extend the service life of the pressure instrument, which reduces process downtimes. They prevent corrosion, contamination, or clogging of your pressure gauges while eliminating or reducing maintenance costs. Plus, they reduce fugitive emissions.

WHAT ARE DIAPHRAGM SEALS MADE OF?

Diaphragms seals are available to handle a broad range of applications and fluids. Elastomers are commonly used, since diaphragm seals must be highly flexible. They also include a vast array of both specialty and general purpose rubbers. Low pressure applications generally benefit from the use of elastomers.

When specific chemical compatibility and high pressure ratings are required, metal diaphragms made of titanium, stainless steel, or various other metals are used. Flush welded versions and flanged assemblies are available.

WHEN ARE DIAPHRAGM SEALS USED?

Whenever a process fluid needs to be protected from a pressure sensor, or vice versa, a diaphragm seal will come in handy. For instance, in pharmaceutical and food sanitary processes where allowing process fluid to accumulate could compromise the purity of the fluid. Or, if the metal surface of the pressure sensor could contaminate a very pure process fluid, as in the petrochemical industry, diaphragm seals and capillaries should be utilized.

	FLUSH FLANGED DIAPHRAGM SEAL Flanged Seal with flush diaphragm for Off-line process connection Standard flange sizes from ANSI 2” to 4”. Additional sizes available on request Standard flange ratings from ANSI Class 150 to ANSI Class 2500 Other flange standards available
	FLANGED PANCAKE DIAPHRAGM SEAL Flanged Wafer/Pancake Seal with flush diaphragm for Off-line process connection Standard flange sizes from ANSI 2” to 4”. Additional sizes available on request Standard flange ratings from ANSI Class 150 to ANSI Class 2500 Sold with or without the flange Other flange standards available
	FLANGED EXTENDED DIAPHRAGM SEAL Flanged Seal with extended diaphragm for Off-line process connection Enable flush installation on pipe or heavily insulated tanks. Standard flange sizes from ANSI 2” to 4”. Additional sizes available on request Standard flange ratings from ANSI Class 150 to ANSI Class 2500 Custom extension lengths and diameters are available Other flange standards available
	FLANGED OFFLINE DIAPHRAGM SEAL Flanged Seal with recessed diaphragm for Off-line process connection 3 Sizes to fit various applications Standard flange sizes from ANSI ½” to 3”. Standard flange ratings from ANSI Class 150 to 600, Extended rating to ANSI class 1500 Other flange standards available
	THREADED OFFLINE DIAPHRAGM SEAL Standard threaded Seal for off-line process connections. 3 Sizes to fit various applications Standard Pressure ratings to 1500 PSI and 2500 PSI, Higher pressure ratings available Male or female NPT process connection
	ALL WELDED THREADED MINI DIAPHRAGM SEAL Small threaded seal for off-line process connections All welded construction, No gasket, No Bolting Male or female NPT process connection
	SADDLE DIAPHRAGM SEAL Welded saddle flange seal for on-line pipe applications Standard sizes for 3” pipe and 4” and larger pipe. Standard pressure rating to 1500 PSI Custom configurations available per application. Consult factory Replacement for other manufacturers saddles. Consult factory
	FLUSH THREADED DIAPHRAGM SEAL Male NPT threaded body with flush diaphragm at the end of threads. Suitable for pressures up to 9000 PSI depending on size Sizes from 3/4” NPT to 2” NPT
	CHEMICAL TEE / WEDGE DIAPHRAGM SEAL Chemical Tee or Wedge flanged seal to fit flow wedge applications 300 PSI maximum working pressure Body material always matches the diaphragm material
	PULP & PAPER DIAPHRAGM SEAL Pulp and paper industry standard seals for on-line applications. Interchangeability with many other manufacturers designs Other connection designs may available per application. Consult factory