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Calibrations (Accredited laboratory) Maintenance - Repairs Department of Cleanroom Validation (Lloyd's Register Certified)) IQ/OQ/PQ Temperature/ Humidity Mapping Occupational Health & Safety Measurements Validation Studies Vibration and Noise studies Laboratory OrganizationSF Series
SF Series
Solid front safety pressure gauges
TECHNICAL SPECIFICATIONS
• Nominal sizes
- NS 100 and 150 for model SF 316;
- NS 125 (4 1/2”) (maximum scale value 1000 bar) for model SF 317.
• Execution
- MD : full scale value up to 1600 bar - dry;
- MF : full scale value up to 1600 bar - liquid filled;
- MP : full scale value up to 1600 bar - fillable;
- HD : full scale value 2500 and 4000 bar - dry;
- HF : full scale
• Casing
- case and ring in AISI 304 stainless steel (AISI 316 on request - option V61) with bayonet bezel for model SF 316;
- phenolic case for model SF 317.
• Compensating diaphragm
- rubber for models SF 316 and SF 317 in liquid filled or fillable execution.
• Protection degree (according to EN 60529)
- IP 55 for execution D (dry);
- IP 65 for execution F (liquid filled) and execution P (fillable).
• Window
- laminated safety glass for model SF 316;
- polycarbonate for model SF 317.
• Filling liquid
- glycerine (standard);
- silicone fluid (on request for SF 316 only - option V64).
• Pressure connection
- AISI 316L stainless steel G 1/2 B (1/2 Gas or BSP) or 1/2-14 NPT EXT (1/2 NPT) thread for NS 100, 125 and 150 with ranges up to 1600 bar;
- AISI 316L stainless steel 5/8-18 UNF or M16x1,5 female thread with tapered seal, for NS 100 and 150 with ranges 2500 and 4000 bar;
- Monel 400 (on request only - option V68).
• Pressure element
- AISI 316Ti stainless steel for scale values up to 1600 bar;
- Ni-Span C (Fe Ni Cr alloy) for scale values 2500 and 4000 bar;
- Monel 400 ( option V68).
• Welding
- TIG.
• Movement
- stainless steel.
• Ranges (according to EN 837-1)
o Maximum values referred to NS:
- 1000 bar for NS 125;
- 4000 bar for NS 100 and 150.
o Scale ranges for pressure values between
-1 and 4000 bar:
- pressure gauges: see table B1 at page P06;
- vacuum gauges and compound gauges: see table B2 at page P07; (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 range.
o Scale angle:
- 270 °.
• Working pressures
o referred to measuring ranges up to 1600 bar:
- steady: from 1/10 to 3/4;
- fluctuating: from 1/10 to 2/3;
- pulsating: from 1/10 to 1/2.
o referred to measuring ranges of 2500 and 4000 bar:
- steady: from 1/10 to 2/3;
- fluctuating: from 1/10 to 1/2.
• Over-pressures (occasionally allowed)
- 130% of full scale value for measuring ranges up to 1600 bar (standard);
- 160% of full scale value for measuring ranges up to 60 bar (option V25);
- 250% of full scale value for measuring ranges up to 60 bar (option V27);
- not allowed for measuring ranges 2500 and 4000 bar.
• Pointer
- aluminium with micrometer adjustment for dry execution;
- aluminium not adjustable for liquid filled execution.
• Dial
- white aluminium with black figures (for dial modifications see available options).
• Accuracy (according to EN 837-1)
o SF 316:
- class 1 (± 1% of full scale deflection) standard;
- class 0,6 (± 0,6% of full scale deflection) on request - option V36.
o SF 317:
- class 0,5 (± 0,5% of full scale deflection) standard (according to BS and ANSI).
• Ambient temperature
- -30 ÷ +60 °C dry execution;
- +10 ÷ +60 °C glycerine filled execution;
- -30 ÷ +60 °C silicone fluid filled execution.
• Thermal drift
- out of optimum ambient temperature values included within +15 ÷ +25 °C, the thermal drift affects the instruments accuracy of 0,3% every 10 °C.
• Service conditions
- operating temperature included between -30 and +250 °C for measuring ranges up to 1600 bar;
- operating temperature included between +10 and +150 °C for measuring ranges 2500 and 4000 bar.
note: 80 °C maximum temperature operating for glycerine filled instruments, 120 °C for silicone fluid filled ones.