Model Number

BN Bourdon - P Capsule - M Diaphragm

GENERAL FEATURES OF SERIES BN
?EXECUTION: dry (BN_I) , glycerine filled (BNV_I), Solid Front type (BNS_I) DN 100 and DN 150 only
The glycerine filled models are suitable in case of mechanical vibrations and pressure pulsations or surges; these model are provided with an upper special neoprene blow-out disc that compensates for case internal pressure changes and enables case filling.
?CASING: DN 63, DN 100 and DN 150, IP 65 (IEC 144).
Case and bayonet bezel ring from AISI series 300 stainless steel drawn sheet.
?BOURDON TUBE ELEMENT: (type ?C? up to 60bar; helical type over 60 bar)
Wetted parts AISI 316 L Bourdon tube; AISI 316 connection; Joints all TIG welded.
MOUNTING direct, surface or flush.
?RANGES: from vacuum to 0/600 bar (see table overleaf).
?MOVEMENT: AISI series 300 stainless steel with stop on zero and full scale
?DIAL:Aluminium. Inalterable black numerals and graduations on white background.
Graduated scale and markings according to EN 837.
?POINTER: Anodised duralumin with micrometer front adjustment.
?ACCURACY: Class 1 to EN 837 (at 20° C).
?TEMPERATURE ERROR: max. ± 0,3 % of span x 10 K.
?AMBIENT TEMPERATURE: -40/+ 65° C
(-15/+65° C for glycerine filled models).


GENERAL FEATURES OF SERIES P
?APPLICATION:
Measurement on clean gas or vapors not liable to condensate inside the instrument.
?CASING: DN 150, IP 55 (IEC 144).
Case and bayonet bezel ring from AISI series 300 stainless steel.
?CAPSULE ELEMENT:
Elastic element: corrugated diaphragm from gauged metal sheet, artificially aged to stabilize elastic characteristic.
Wetted parts: diaphragms: Nickel-Silver 18 for 4 and 6 mbar spans, AISI 304 or 316 for other ranges.PVC tube.
Other parts: AISI 304.
?MOUNTING: direct, surface or flush.
?RANGES: from -600/0 to 0I600 mbar (see table overleaf).
?MOVEMENT: High precision, nickel-plated brass construction, watchmaker alloy geared quadrant, nickel pinion, bronze hairspring with protecting disc.
?DIAL Copper free (max. 0,1%) aluminium. inalterable black numerals and graduations or white background.
Graduated scales and markings according to EN 837.
?POINTER Anodised duralumin with micrometer front adjustment.
?ACCURACY: Class 1 to EN 837 (at 20° C).
?AMBIENT TEMPERATURE: -10 to + 70° C.

GENERAL FEATURES OF SERIES M
?CASING: DN 150, IP 55 (IEC 144).
Case and bayonet bezel ring from AISI series 300 stainless steel.
?DIAPHRAGM ELEMENT: Elastic element corrugated diaphragm from gauged metal sheet, artificially aged to stabilize elastic characteristic.
Wetted parte: see table overleaf, point 1.
?MOUNTING: Direct, or surface through optional bracket.
?RANGES: from vacuum to 0/25 bar (see table overleaf).
?MOVEMENT: Heavy-duty, AISI series 300 stainless steel, with bushed pivots.
?DIAL: Copper free (max. 0,1 %) aluminium. Inalterable black numerals and graduations on white background.
Graduated scales and markings according to EN 837.
?POINTER: Anodised duralumin with micrometer front adjustment.
?ACCURACY: Class 1 to EN 837 (to 20° C).
?TEMPERATURE ERROR: max. ± 0,6% of span x 10 K.
?AMBIENT TEMPERATURE: -20 to +70°C.