ĐỒNG HỒ ĐO ÁP SUẤT WIKA 230.25

Design
ASME B40.100
Sizes
2” (50 mm)
1 ½” (40 mm)
Accuracy Class
2”: ± 2/1/2% of span (ASME B40.100 Grade A)
1 ½”: ± 3/2/3% of span (ASME B40.100 Grade B)
Ranges
Vacuum / compound to 30”Hg/0/300 psi
Pressure from 15 psi up to 5000 psi or other equivalent units of pressure or vacuum
Working Pressure

Steady:         3/4full-scale value

Fluctuating:   2/3 full-scale value

Short time:    full-scale value

Operating Temperature
Ambient: -40°F to +140°F (-40°C to +60°C)
Medium: +212°F (+100°C) maximum
Temperature Error
Additional error when temperature changes from reference temperature of 68°F (20°C) ±0.4% for every 18°F (10°C) rising or falling. Percentage of span.
Weather Protection
Weather resistant (NEMA 3 / IP 54)
Pressure Connection
Material: Face-seal nut, 316 SS
Face-seal gland, 316L SS VOD or VIM/VAR
Position: Lower mount (LM)
Center back mount (CBM)
Type of Connection: Face-seal fixed male, swivel male or female
Wetted Surface Finish: Ra < 0.25µm (Ra < 10µinch)
Bourdon Tube
Material: 316L SS
30”Hg (vac) to 1,000 psi, C-type
1,500 to 5,000 psi, helical type
Helium leak tested 1 x 10-9 scc/sec (inboard)
Socket
Material: 316L VIM/VAR electropolished
Ra < 0.25µm (Ra < 10µinch) – internal

Movement
Stainless steel
Dial
White aluminum with stop pin and black lettering
Pointer
Black aluminum
Case
304 SS, electropolished
Window
Polycarbonate: twist-lock (2”), snap cap (1½”)
Cleanliness
UHP ‘clean’ for semiconductor gas applications - in accordance with SEMI/SEMATECH
Cleaned and packed in class 100/10 cleanroom
Packaged in two bags
Purged with Nitrogen
Protective cap over threaded connection
Order Options (minimum order may apply)
Inductive Pressure Switch (830.1E)
Custom dial layout
Dual pressure scales
Optional materials for Male / Female Face-seal Nuts - 316 SS, Gall Resistant (Nitronic 60)