P820 Series (316L type double melt)_Ultra high purity pressure gauge (EP grade)
Service intended
P820 series are specially designed for the ultra-high purity gas distribution system used in a semiconductor, electronic, medical, biotechnology and pharmaceutical industry.
| Nominal diameter | 50 (2″) and 63 mm (2½”) |
| Accuracy | Grade A: 50 (2″) and 63 mm (2½”) Grade B: 50 (2″) and 63 mm (2½”) |
| Scale range | -0.1 ~ 0 to 0 ~ 28 MPa |
| Working pressure | Steady pressure : 75 % of full scale value Fluctuating pressure : 67 % of full scale value |
| Working temperature | Ambient : -40 ~ 65 °C Fluid : Max. 100 °C |
| Temperature effect | Accuracy at temperature above and below the reference temperature (20 ℃) will be effected by approximately ±0.4 % per 10 ℃ of full scale |
Standard features
| Pressure connection | Type 316L SS double melt electropolished low mount or center back mount surface finish Ra≤0.25㎛ ■ ¼” NPT male thread ■ Swivel male or female face seal fitting |
| Element | Type 316L SS <6 MPa : C-type bourdon tube ≥6 MPa : Helical type bourdon tube |
| Case | Type 304SS, Electropolished with pressure relief |
| Cover and window | Twist-lock polycarbonate |
| Movement | Stainless steel |
| Dial | White aluminium with pointer stop pin With black/red lettering, dual pressure scale (bar/psi) |
| Pointer | Black painted aluminium alloy |
| Helium leak rate | Tested to confirm leakage rates of less than 10 mbar • ℓ/sec |
| Certificates | ATEX II 2G Ex h IIC T6…T1 Gb ATEX II 2D Ex h IIIC T85°C….T450°C Db |
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