P840 series (316L type) (P841, P842, P843)
Service intended
P840 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 mm (2") |
| Switch point accuracy |
±2.0 % of full scale |
| Scale range |
0 ~ 28 MPa |
| Working pressure |
Steady pressure : 75 % of full scale value
Fluctuating pressure : 67 % of full scale value |
| Working temperature |
Ambient : -20 ~ 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
Mechanical
| Pressure connection |
Type 316L SS electropolished low mount or center back mount
surface finish Ra≤0.25 ㎛
■ ¼" NPT male thread
■ VCR® 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 |
| Pointer |
Black painted aluminium alloy |
| Dial |
White PVC, with pointer stop pin
With black/red lettering, dual pressure scale (bar) |
| Helium leak rate |
Tested to confirm leakage rates of less than
10 -9 mbar • ℓ/sec |
Standard features
Electrical
| Connection |
26 AWG, PVC
6 feet (2 m) |
| Maximum switching current |
0.5 amps AC/DC noninductive load |
| Maximum power |
10 W/DC, 12 VA/AC |
| Maximum switching voltage |
28 V AC/DC |
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