Đại lý Tema Vasconi tại Việt Nam

MM900 serie | Đồng hồ đo áp suất dạng màng Tema Vasconi

In the pressure gauges series MM900, the sensing element is a diaphragm with concentric corrugations actuating the amplifying mechanism through a pivot.  Designed for the measurement of pressure, vacuum of viscous fluids, crystallizing or polluted process fluids.  These instruments are more reliable ane easy to protect against overpressure than  the Bourdon tube type according to EN837-3.

TECHNICAL CHARACTERISTICS

• Diameters: 100-150 mm
• Case and ring: st. st. 304, bayonet type ring
• Protection degree : IP55/IP65 (EN60529/IEC529)
• Transparent: glass, thickness 4mm, gasket in neoprene
• Movement: st. st., 
• Dial: aluminium with black numerals on white background 
• Pointer: Aluminium., black painted, micrometric adjustable
• Blow out: neoprene, upper 
• Upper part material : forged in st. st. 316
• Pivot : AISI316
• Sensing element: diaphragm with concentric corrugations in st. st.  
• 316 for ranges ≤ 2,5 bar. Zinc plated steel  for ranges  ≥ 4 bar
• Gasket material :  PTFE or VITON
• Lower part material :  forged st. st. 316
• Connection dimension: threaded ½”NPTM or BSP/M
•     suitable for flange UNI, ANSI 
• Mounting: direct, lower connection type 901
• Ranges: see table at page 2
• Overpressure:  +25% F.S. for range up to 60bar 
• Accuracy: class 1,6 acc. to EN837 at 20°C
• Ambient temperature limit:  -25/+65°C
• Fluid temperature limit: max 100°C
• Construction  acc. to ATEX directive 94/9/EC, gr.II cat. 2GDc  (on request) 
• Construction according to PED directive 97/23/EC (on request)

OPTIONS AND ACCESSORIES 

• Sovrapressione speciale
• Cassa ed anello in AISI316
• Esecuzione tropicalizzata
• Trasparente in Plexiglass o vetro di sicurezza
• Parti a contatto rivestite in TEFLON
• Membrana rivestita con materiali speciali :Monel, 
• Hastelloy B o C , Tantalio ,  Nickel
• Esecuzione per pressione assoluta 
• Fermi sul movimento 
• Trasparente in Acrilico con indice di max azzerabile dal fronte 
• Contatti elettrici (vedi prospetto dedicato)
• Riempimento con glicerina al 90% per T.amb.0÷65°C
• Riempimento con glicerina al 98% per T.amb.-15÷65°C
• Riempimento con olio al silicone per T.amb.-45÷65°C
• Riempimento con oli fluorurati per impiego su 
• Ossigeno e T. .amb –60÷65 °C
• Sgrassaggio per servizio su ossigeno
• Smorzatore di pulsazioni , limitatore di pressione esterno, sifoni di raffreddamento, valvola portamanometro 
• Special overpressure 
• Case and ring st st 316
• Tropical version
• Acrylic window or laminated safety glass 
• Wetted parts coated with PTFE
• Diaphragm coated with special material : Monel , 
• Hastelloy B or C , Tantalum , Nickel
• Absolute pressure version 
• Over and underload stop
• Acrylic window with max value pointer settable from  front
• Electrical contacts (see dedicated leaflet) 
• Glycerine filling at 90% for T.amb.0 ÷65°C
• Glycerine filling at 98% for T.amb.-15 ÷65°C
• Silicon oil filling for T.amb.-45 ÷65°C
• Fluorinated oil filling for use on Oxygen or for T.amb  –60 ÷65°C
• Degreasing for use on Oxygen 
• Pulsation dampener ,Exthernal overpressure protector, 
• Pig-tail syphon , Valves