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Bellow point of use - S21
S21 point of use is designed for specialty gas applications. It is based on the S20 pressure regulator technology.
Key advantages
  • Bellow technology permits a large range of accurate outlet pressures in a compact design
  • Flexible mounting options on wall or panel
  • Must be installed with a flash back arrestor for use with acetylene
  • Acetylene version available (AD)

FLOW CURVES

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Specifications
Female portsG 3/8 (inlet/outlet) or 1/4 NPT (inlet/outlet)
Seat sealEPDM
O-ringEPDM - Standard / FPM
Diaphragm (valve)Hastelloy®
BellowBronze (Brass version) / AISI 316L (SS version)
Weight± 0,9 kg
Leak rate10-8 M bar l/s
Temperature range-20 to +60 °c
GaugesLow pressure (M10 x 1 or 1/4 NPT)
Inlet pressure50 bar, AD: 20 bar
Outlet Pressure1/3/10 bar, AD: 1,5 bar
Nominal flow2/2,5/3,5 Nm3 /h (N2 ), AD: 1 Nm3 /h
Oxygen useinlet pressure ≤ 30 bar max. for brass and stainless steel
Dimensional drawings
Drawing
Product Configurator
 
Body material
 
Outlet Pressure
End connections
O-ring material
Gauges
Plate
S
L
S21
1
G
EPDM
0
STD
 
Chrome plated brass
Stainless steel
 
1 bar
3 bar
10 bar
Acetylene version 1,5 bar
G 3/8 - G 3/8
1/4 NPT- 1/4 NPT
EPDM - standard
FPM
Without
With
Without plate
With metal plate
Downloadable catalogs, brochures
  • Download
    Pressure Regulators Catalog
    Last update: Feb 21, 2022
    Available in: en/fr/de/fr/de
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