HOME | PRODUCTS | PRESSURE GAUGES | SOLID FRONT PRESSURE GAUGES S3 | SF 316
• Nominal sizes
- NS 100 and 150 for model SF 316;
- NS 125 (4 1/2”) (maximum scale value 1000 bar) for model SF 317.
• 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.
• Protection degree (according to EN 60529)
- IP 55 for execution D (dry);
- IP 67 for execution F (liquid filled) and execution P (fillable - SF 317).
• 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 9/16-18 UNF or 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 316L stainless steel for scale values up to 1600 bar;
- di Ni-Span C (lega Fe Ni Cr) per valori di fondo scala 2500 e 4000 bar;
- di Monel 400 (variante V68).
- 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 Divisions related for pressure values between -1 and 4000 bar:
- pressure gauges: see table C1 at page P04;
- compound gauges: see table C1 at page P04;
- 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 pressure
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-pressure (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;
• Dial
- white aluminium with black figures (for dial modifications see available options).
• Accuracy (secondo EN 837-1)
o SF 316:
- class 1 (± 1% of full scale deflection) standard;
- class 0,6 o 0,5 (± 0,6 o 0,5% of full scale deflection) on request - option V36 o V34 (full scale 4000 bar excluded).
o SF 317:
- class 0,5 (± 0,5% of full scale deflection) standard (according to BS and ANSI).
• Ambient temperature
- -40 ÷ +60 °C dry execution;
- -20 ÷ +60 °C glycerine filled execution;
- -40 ÷ +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.
• Operating temperature
- -40 ÷ +250 °C dry execution;
- -20 ÷ +100 °C glycerine filled execution;
- -40 ÷ +120 °C silicone fluid filled execution.
note: 80 °C maximum operating temperature for glycerine filled instruments, 120 °C for silicone fluid filled ones.
Solid front safety pressure gauges
SF 316 with stainless steel casing
SF 317 with phenolic casing
Solid front pressure gauges are manufactured as per EN 837-1 and ASME B40.1. During the design of this type of pressure gauges, “safety” factor is taken into great consideration. Safety is guaranteed by a protection baffle wall positioned between the pressure element assembly and the dial, and by a blow-out device made of a back plate which allows an eventual pressure vent from the casing.