• Nominal sizes

- 40, 50, 63, 80 e 100.

• Casing

- see table NP 1.

• Window

- see table NP 1.

• Pressure connection (according to EN 837-1)

- brass with Gas (BSP), BSPT or NPT thread as F dime sion shown in NP tables, otherwise only on request, different from those indicated.

• Pressure element

- phosphor bronze.

• Welding

- tin alloy;

- tin/silver alloy for temperatures > 65°C and/or pressures > 60 bar.

• Movement

- brass.

• Ranges (according to EN 837-1)

o Graduation:

- pressure gauges: 0 ÷ 1; 0 ÷ 1,6; 0 ÷ 2,5; 0 ÷ 4; 0 ÷ 6; 0 ÷ 10; 0 ÷ 16; 0 ÷ 25; 0 ÷ 40; 0 ÷ 60; 0 ÷ 100; 0 ÷ 160; 0 ÷ 250; 0 ÷ 400;

- vacuum gauges: -1 ÷ 0;

- compound gauges: -1 ÷ 0,6; -1 ÷ 1,5; -1 ÷ 3; -1 ÷ 5; -1 ÷ 9; -1 ÷ 15; -1 ÷ 24; (divisions as per table C1 at page P08)

- other graduations not normalized for single or double range (on request).

o Unit of pressure:

- bar, kPa, MPa, kg/cm2 and psi for single or double scale.

o Scale angle:

- 270 °.

note: working pressure, if constant, has to be included between 1/10 and about 3/4 of full scale value; for fluctuating or pulsating pressures it is suitable to choose a liquid filled instruments of SP series.

• Over-pressure

- not allowed.

• Pointer

- burnished steel - not adjustable.

• Dial

- white aluminium with black figures.

• Accuracy (according to EN 837-1)

- class 1,6 (± 1,6% of full scale deflection) for NS 63, 80 and 100;

- class 2,5 (± 2,5% of full scale deflection) for NS 40 e 50.

• Ambient temperature

- -10 ÷ +60 °C.

• Operating temperature

- 0 ÷ + 65 °C with tin alloy welding;

- -10 ÷ +120 °C with tin/silver alloy welding.