모델명	:	422.12/423.12
	제조회사	:	WIKA
	원산지	:	GERMANY

국문 카다로그	국문 메뉴얼	영문 카다로그	영문 메뉴얼

Sealgauge Diaphragm Pressure Gauge
Cast Iron Case
Carbon Steel Wetted 
Parts
Process Industry Series
Type 422.12 - Dry Case
Type 423.12 - 
Liquid-filled Case 





Applications

With liquid filled case for applications with high dynamic pressure 
pulsations or vibration

Suitable for corrosive environments and gaseous or liquid media that will 
not obstruct the pressure system

Process industry: chemical/petrochemical, power stations, mining, on and 
offshore, environmental technology, mechanical engineering and plant 
construction 



Special Features

Excellent load-cycle stability

Heavy duty cast iron case

High overpressure safety 

 












Standard Features
 


 



Design
EN 837-3
Temperature error
Additional error when temperature 
changes
from reference temperature of 68°F (20°C) ±0.8%
for every 18°F 
(10°C) rising or falling. 
Percentage of span.

Sizes
4” & 6” (100 & 160 mm)
Weather protection
Weather resistant (NEMA 3 / IP54) - 
dry case
Weather tight (NEMA 4X / IP65) - liquid-filled case

Accuracy class
± 1.5% of span
Pressure connection and lower diaphragm 
housing
Material: carbon steel, black finish
Lower mount 
(LM)
1/2” NPT female

Ranges
Vacuum / Compound to 200 psi
Pressure from 10” 
H2O to 100” H2O
(6” flange diameter)
Pressure from 6 psi to 600 psi
(4” 
flange diameter)
or other equivalent units of pressure or vacuum
Case and upper diaphragm housing
Material: cast iron, 
black finish
Case with black-painted steel bayonet ring

Working pressure
Steady: full scale 
value
Fluctuating: 0.9 x full scale value

Diaphragm element
≤30 psi: 316L stainless steel
> 
30 psi: carbon steelAll ranges with Buna-N sealing gasket

Overpressure safety
< 6 psi: 5 x full scale 
value
≥6 psi: 3 x full scale value, max. 
600 psi
Movement
Material: copper alloy with nickel-alloy 
wearable parts

Operating temperature
Ambient: -4°F to +140°F(-20°C to 
+60°C)
Medium: +212°F(+100°C) maximum
Dial
White aluminum with black lettering