A Bourdon Tube Pressure Gauge is a mechanical device used to measure pressure in liquids and gases. It consists of a curved, hollow metal tube known as the Bourdon tube. When pressure is applied inside the tube, it tends to straighten or change its shape. This movement is proportional to the pressure applied. The motion of the tube is transmitted through a linkage mechanism to a pointer. The pointer moves over a calibrated dial to indicate the pressure reading. It is widely used in industrial and laboratory applications. Bourdon tube gauges are known for their simplicity and durability. They do not require any external power source to operate. Overall, it is a reliable and cost-effective instrument for pressure measurement.A Bourdon tube pressure gauge is a mechanical device used for measuring gauge pressure from 0.6 to 7, 000 bar (approx. 8.7 to 101, 500 psi) by utilizing an elastic, flattened tube (C-shaped or helical) that straightens under pressure.
Standard ■ EN 837-1
■ ASME B40.100
For information on the “Selection, installation, handling and operation of pressure
gauges”, see technical information IN 00.05.
Further version ■ Oil- and grease-free for oxygen
■ Per NACE 1) MR0175 / ISO 15156, use in H₂S-containing environments in oil
and gas production
■ With pre-volume deflagration flame arrester 2) for mounting to zone 0 (EPL Ga);
model 910.21; see data sheet AC 91.02
■ Monel version; models 262 and 263; see data sheet PM 02.33
Nominal size (NS) ■ Ø 63 mm [2 ½“]
■ Ø 100 mm [4“]
■ Ø 160 mm [6“]
Connection location ■ Lower mount (radial)
■ Lower back mount
■ Centre back mount (only for NS 63 [2 ½“])
Window Laminated safety glass (NS 63 [2 ½“]: Polycarbonate)
Case
Design Safety level “S1” per EN 837-1
With blow-out device at case circumference, 12 o'clock (NS 63 [2 ½“]) and on the
back of the case (NS 100 [4“] and 160 [6“])
Scale ranges ≤ 0 ... 16 bar [≤ 0 ... 300 psi] with compensating valve to vent and
reseal case
Material ■ Stainless steel 1.4301 (304)
■ Stainless steel 1.4571 (316Ti)
Ring Bayonet ring, stainless steel
Mounting ■ Without
■ Panel mounting flange, stainless steel
■ Panel mounting flange, polished stainless steel
■ Triangular profile ring with mounting bracket, polished stainless steel
■ Surface mounting flange, stainless steel
Case filling (model 233.50) ■ Without
■ Glycerine
■ Glycerine-water mixture for NS 100 [4“] and 160 [6“] with scale range
≤ 0 ... 2.5 bar [≤ 0 ... 40 psi] or for NS 63 [2 ½“] with scale range ≤ 0 ... 4 bar
[≤ 0 ... 60 psi]
■ Silicone oil
Movement ■ Stainless steel
■ Stainless steel 1.440
