ĐỒNG HỒ ĐO ÁP SUẤT WIKA 312.20

Standard

EN 837-1

See Technical Information IN 00.05 for information on “Selection, installation, handling and operation of pressure gauges”.

Nominal size (NS)

Ø 160 mm [6"]

Accuracy class

0.6

0.25 (selectable for scale ranges ≤ 400 bar)

Grade 3A per ASME B40.100 (selectable for scale ranges ≤ 400 bar)

Scale ranges 0 ... 0.6 bar to 0 ... 600 bar [0 ... 10 psi to 0 ... 10,000 psi]

other units (e.g. psi, kPa) available

or all other equivalent vacuum or combined pressure and vacuum ranges

Scale

Single scale

Mirror band scale

Zero point setting

Without

From outside through adjustable dial

Pressure limitation

Steady:         Full scale value

Fluctuating:  0.9 x full scale value

Short time:   1.3 x full scale value

Connection location

Lower mount (radial)

Lower back mount

Process connection

G ½ B

Others on request

Permissible temperature

Medium

+80 °C [+176 °F]

+100 °C [+212 °F] (version with special soft solder)

+200 °C [+392 °F] (model 332.50, see data sheet PM 03.06)

Ambient

-20 ... +60 °C [-4 ... +140 °F]

Temperature effect

When the temperature at the measuring system deviates from the reference temperature +20 °C [+68 °F]: ≤ ±0.4 %/10 °C [≤ ±0.4 %/18 °F] of full scale value

Case filling

Without

With case filling (model 333.50, see data sheet PM 03.06)

Wetted materials

Process connection

Copper alloy

Pressure element < 100 bar: Copper alloy, C-type

≥ 100 bar: Stainless steel 316L, helical type

Non-wetted materials

Case Stainless steel

Safety level “S0” per EN 837

Safety level “S1” per EN 837: With blow-out device in case back

Ring

Bayonet ring, stainless steel

Triangular profile ring, polished stainless steel, with clamp

Movement

Copper alloy, wear parts argentan

Dial

Aluminium, white, black lettering

Pointer

Knife edge pointer, aluminium, black

Window

Instrument glass

Ingress protection per IEC/EN 60529 IP54

Adjustment medium

Liquid for scale ranges > 25 bar; gas for scale ranges ≤ 25 bar

Gas for all scale ranges