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Globe valve for oxygen pipelines - R178
R178 is a globe valve with body, bonnet and most of the internal ports made of copper aluminum. It is particularly suited for pressure equalization across on isolation gate valve. Used as bleed, shut off or line valves for consignment of secondary by-pass systems. The valve is designed for combustive gases, pure gases, oxidizing gases and can be actuated by a manual handwheel or a pneumatic actuator.
Key advantages
  • One direction shown by an arrow
  • Leakage class IV-1
  • Pressure up to 100 bar
  • Oil free standard
  • Minimum pressure losses under medium pressure
  • Large range of flanges diameter and seat
Specifications
Operating press. range (ps)0 to 100 bar
Operating temp. range (ts)-20 to +60 °c
Direction of flowOne direction as shown by the arrow on the valve body
InstallationAll positions
Lackage classTaux A (acc. to EN 12266-1) or IV-1 (acc. to DIN3230 STD)
Seat diameter020 to 0100 Mm
Material (envelope)Copper-Aluminium (CuAl)
Material (o-ring)FPM
Material (seat/guiding)PCTFE
Electrical conductivityCopper braid between shutter and body
Production testsIndividual tests (hydraulic at 150 bars leaktightness at 110 bars)
Manual actuationHandwheel
Pneumatic actuationDouble acting or single acting actuator (autopneumatic)
DimensionsDN20 to DN100
Face and finishRF (Raised Face), FF (Flat Face), Ring Type Joint (RTJ) Other on demand
Dimensional drawings
Drawing
Product Configurator
type
Actuator
Diameter number (dn)
0seat
Pressure number (pn)
Flange type
material
R178
MS
20
20
100
FF
CU AL
 
Manual
MS
Manual + spindel extension
MR
Auto-pneumatic
P1
Pneumatic with manual emergency control
PM
Pneumatic with manual emergency control and spindel extension
PMR
DN20
20
DN25
25
DN50
50
DN80
80
DN100
100
020mm
20
025mm
25
050mm
50
080mm
80
0100mm
100
PN 100
100
Other on demand
Flat Face
FF
Raised Face
RF
Ring Type Joint
RTJ
Other on demand
CopperAluminium
CU AL
Downloadable catalogs, brochures
  • Download
    Merobel Valves and Regulators
    Last update: May 17, 2021
    Available in: en
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