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differential pressure switches

3.29

These differential pressure switches are IP 65, and suitable for a variety of applications such as: chemical, petrochemical, conventional
power station where it is required to control differential pressure, level, flow. The sensing element is a metallic diaphragm with 2
metallic bellows and acts directly on the microswitch through a self-centering pivot. The simplicity of the design, without levers, cams
or similar mechanism, gives the unit an exceptionally long working life.

3.29 - Standard Model

Process temperature: +212°F max (100°C).
Ambient temperature: -13...+149°F (-25...+65 ∞C).
Thermal drift: ≤ 0,027% / °F (≤ 0,05% / °C).
Process connection: AISI 316 st. st.
Elastic element: AISI 316 st.st. diaphragm with N.2 AISI 321
st.st. bellows; PTFE gasket.
Case: AISI 304 st.st.
Cover: AISI 304 st.st. bayonet lock.
Flushing plugs: AISI 316 st.st.
Tag: AISI 304 st.st., etched.
Weight: 13.66 lbs (6,2 kg).

Ranges: 0...250 mbar/0...600 mbar.
Electrical specifications: N. 1...2 SPDT microswitches (see
microswitches table).
Differential: fixed.
Repeatability: ≤ 1% of the full setting value.
Set-point adjustment: internal, micrometric adjustable.
Protection: IP 65 as per EN 60529/IEC 529.
Electrical wiring: terminal strip.
Earth contacts: N. 1 internal.

Setting ranges
20...250 mbar
25...400 mbar
35...600 mbar

One side
static pressure
2,5 bar
4 bar
4 bar

Both side
static pressure
4 bar
4 bar
4 bar

Differential
1 micro (1)

Differential
2 micro (1)

10 mbar
16 mbar
20 mbar

15 mbar
20 mbar
30 mbar

(1) differential and minimum set-point values for microswitches cod. I, L, N, R, S, T, U, V are 300% of those shown in table.

-1-

ISO 9001 : 2000
Cert. no. 0433/3