Shaeffer Diaphragm Pressure Gauge

Description

A diaphragm pressure gauge, also known as a Shaeffer gauge, employs a durable yet sensitive diaphragm as its primary sensing element. A distinguishing feature of this type of gauge is its ability to measure pressure without the need for a transmitting liquid (system fill) to convert pressure displacement into pointer movement. Instead, a push rod mechanically links the diaphragm to the gauge’s movement mechanism.

Specifications
■ Nominal size 100 – 160
■ Accuracy class (EN 837-3/6): 1,6
■ Ranges (EN 837-3/5) See ordering table
■ Application area
Static load: Full scale value
Dynamic load: 0.9 x full scale value
■ Overpressure safety
≤ 0.4 bar: At least 1.3 x FS
≥ 0.6 bar: At least 5 x FS
≥ 10 bar: Max. 40 bar
■ Operating temperature range
Medium: Max. 100 °C
Ambient: -20/+60 °C
■ Temperature performance
Indication error when the temperature of the measuring system deviates from the normal temperature of 20 °C:
at rising temperature approx. ± 0.8 %/10 K falling
temperature approx. ± 0.8 %/10 K of full scale value
■ Degree of protection: IP 54 (EN 60529)
■ Connection: Steel, bottom G½B, SW22 (EN 837-3/7.3)
■ Lower measuring flange: Steel, galvanised
■ Upper measuring flange: Stainless steel 304
■ Measuring element: Diaphragm
■ Measuring flange: Stainless steel 316 L
■ Seal: NBR (Perbunan)
■ Movement: Brass
■ Dial: Aluminium, white Scaling black
■ Pointer: Aluminium, black
■ Housing: Stainless steel 304, with blow-out
■ Bayonet type bezel: Stainless steel 304
■ Window: Instrument glass

Options
■ Safety housing
■ Overpressure safety 10 x FSD (measuring flange ∅100 to max. 40 bar, measuring flange ∅ 160 to max. 2.5 bar)
■ Glycerine filling (≥ 40 mbar, ≤ 250 mbar accuracy 2.5)
■ Electrical contacts
■ Wetted parts with special coating
■ Open connection flanges as per EN/ASME

Available certification
■ 2.1 certificate of conformity
■ 3.1 material certificate
■ Test certificate for indication accuracy