Diaphragm Pressure Gauges for long-term protection

Diaphragm pressure gauges with open measuring flange are especially well suited in rough conditions with viscous, crystallizing and mediums that carry solid particles. Diaphragm pressure gauges can be easily protected against overpressure.Schmierer Germany has introduced a specialized PTFE Xylan coated Diaphragm Seals for long-term protection against corrosion and chemicals in the Mineral Oil and Chemical Sector.

The Graphene infused Xylan 1427 series fastener-class coatings are  waterborne/VOC-compliant, resin-bonded, thermally cured, single-film, dry-film lubricants and have become the standard for diaphragm gauge membranes with pressure ranges from 0-6 to 0-25 bar.

Working Principle of Diaphragm Pressure Gauges:

 A thin corrugated membrane is built-in between the two flanges of the diaphragm pressure gauges. Pressure applied on one side of the membrane will deflect itself against the direction of the incoming pressure. This deflection of the diaphragm is a measure for the incoming pressure and is carried over to a gear segment onto the gear of the movement. This technology provides a much higher overload safety (up to 40 bar) than standard Bourdon Tube gauges.

For rough environments with vibrations or sudden pressure changes the Manodamp® mechanical movement dampener can be added to provide smooth pointer reading.

Diaphragm Seals are also available in Tantallum and other coatings.
For highly aggressive environments the connection socket and flanges can be made from special materials (316 Ti, PP; PVDF, PVC) and protected with an additional lining.

Specifications

Pressure Range:

• PGU series: 0-16 to 0-400 mbar – overload safety up to 10 bar
  
• PKU series: 0-1 to 0-40 bar, -1 -0 to -1 to 40 bar – overload safety up to 40 bar 

Dial Size: 100 – 160 – 250 mm

Accuracy: ±1,6% of the upper range

Material:

• Measuring Chamber and Connection: stainless steel
• Glass: Shatterproof Safety Glass
• Diaphragm Seal: SS coated with Xylan, PTFE, Tantallum, etc.
• Connection Socket or Flange: Stainless Steel, opt. 316Ti, HC22, PP, PVDF, PVC

Opt: Manodamp® mechanical pointer dampening (movement stabilizer)