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Bellows low to high pressure valve for HP, UHP, corrosive gases and fluids – K300
Key advantages
  • 100% Helium leak test performed on all valves
  • Sustainable metallic bellows providing a high internal/ external tightness
  • Fluid specific seat material as standard options: Metal - Metal on request
  • Visual Open-Close indicator for both manual and pneumatic versions
  • Individual serial number for full traceability
  • Corrosion resistant internal option available: Hastelloy® bellows
  • Electropolished surface roughness
  • 100% degreased for Oxygen use
  • Corrosion resistant external option available: Inox actuation for both manual and pneumatic versions

CONSTRUCTION MATERIAL

  Parts Material
Wetted parts Body SS 316L, VAR
Seat PCTFE or Vespel
Bellows SS 316L
Head/body seal gasket UNS N02201 (Nickel)
Non-wetted parts Handwheel Anodized aluminium
Actuator Body SS 316L and Painted
anodized aluminium
Others SS 430F and C38500

SURFACE FINISH

- EP4 EP2
Ra 0.8 μm Ra 0.4 μm EP  Ra 0.25 μm EP 

SEAT DIAMETER / FLOW CAPACITY/MAX WORKING PRESSURE 

Valve Seat diameter Flow capacity
(Cv)
Max. working
pressure
K308 8mm 0.78 30 bar
K312 12mm 3 100 bar
K320 20mm 7 100 bar
K332 32mm 18 30 bar
K350 50mm 45 30 bar
K380 80mm 114 15 bar

All specifications subject to change without notice

MANUAL DIMENSIONS

MAN. K308 LPMI K312 LPMI  K312 HPMI K320 LPMI K320 HPMI K332 LPMI K350 LPMI K380 LPMI
C 37mm (1.46") 51.5mm (2.03") 51.5mm (2.03") 51.5mm (2.03") 51.5mm (2.03") 62mm (2.44") 63mm (2.48") 275mm (10.83")
O 38.5mm (1.52") 55.5mm (2.19") 55.5mm (2.19") 56.5mm (2.22") 56.5mm (2.22") 70mm (2.76") 75mm (2.95") 297mm (11.69")
ØB 48mm (1.89") 70mm (2.76") 70mm (2.76") 70mm (2.76") 70mm (2.76") 108mm (4.25") 135mm (5.31") 195mm (7.68")
ØE (up to) 22.5mm (0.89") 31.5mm (1.24") 31.5mm (1.24") 38.5mm (1.52")  38.5mm (1.52")  52mm (2.05" 77mm (3.03") 120mm (4.72") 
ØV - - 100mm (3.94") - 100mm (3.94") - - 300mm (11.81")
ØVM 35mm (1.38") 50mm (1.97")   50mm (1.97") - 125mm (4.92") 125mm (4.92") -
He 41mm (1.61") 76.5mm (3.01") 76.5mm (3.01") 85.5mm (3.37") 85.5mm (3.37") 102mm (4.02") 125.5mm (4.94") 175mm (6.89")
L 90mm (3.54") 140mm (5.51") 140mm (5.51") 140mm (5.51") 140mm (5.51") 180mm (7.09") 250mm (9.84") 400mm (15.75")
N 45mm (1.77") 70mm (2.76") 70mm (2.76") 75mm (2.95") 75mm (2.95") 110mm (4.33")  150mm (5.90")  235mm (9.25")

PNEUMATIC DIMENSIONS

PNEU. K308 LPNC/LPNO K312 LPNC/LPNO K312 HPNC/HPNO K320 LPNC/LPNO K320 HPNC/HPNO K332 LPNC/LPNO K350 LPNC/LPNO K380 LPNC/LPNO
C 11mm (0.43")  32mm (1.26") 32mm (1.26") 32mm (1.26") 32mm (1.26") 32mm (1.26") 27mm (1.06") 26mm (1.02"
O 12.5mm (0.49") 36mm (1.42") 36mm (1.42") 37mm (1.46") 37mm (1.46") 40mm (1.57") 39mm (1.53") 38mm (1.50")
ØB 48mm (1.89") 70mm (2.76") 70mm (2.76") 70mm (2.76") 70mm (2.76") 108mm (4.25") 135mm (5.31") 195mm (7.68")
ØE (up to) 22.5mm (0.89") 31.5mm (1.24") 31.5mm (1.24") 38.5mm (1.52") 38.5mm (1.52") 52mm (2.05") 77mm (3.03") 120mm (4.72")
ØV 58mm (2.28")  100mm (3.94") 100mm (3.94") 100mm (3.94") 100mm (3.94") 185mm (7.28") 255mm (10.04") 255mm (10.04")
He 87mm (3.42") 138mm (5.43") 166.5mm (6.56") 176mm (6.93") 202mm (7.95") 267mm (10.51") 347mm (13.66") 441mm (17.36")
L 90mm (3.54") 140mm (5.51") 140mm (5.51") 140mm (5.51") 140mm (5.51") 180mm (7.09") 250mm (9.84") 400mm (15.75")
N 45mm (1.77") 70mm (2.76") 70mm (2.76") 75mm (2.95") 75mm (2.95") 110mm (4.33") 150mm (5.90") 235mm (9.25") 

Dimensions are for reference only and are subject to change without notice

Specifications
Fluid mediaStandard, high and ultra high purity and corossive gases or liquids
Max. working pressuresee table below
Pneumatic actuator operating pressure0.5 - 0.7 MPa (5 - 7 bar)
Temperature range233.15 K to 393.15 K (-40°C to +120°C)*
Flow capacity (cv)see table below
Nominal seat diametersee table below
Certified max. helium outboard leak rate (at max. pressure)≤ 1.10-10 Pa.m3 .s-1
Certified max. helium across the seat leak rate (at max. pressure)≤ 3.10-10 Pa.m3 .s-1
Dimensional drawings
Product Configurator
 
Size
Pressure-range (1)
Actuation
Body material
Seat material
End-connection (2)
Surface finish
Options (3)
K3
08
LP
MI
I
/K
BWO
-
-
 
(1) High-pressure version available for K312 and K320
(2) Size to be defined by customer and ROTAREX
(3) Combinable
(4) Only for K308 and K312
Downloadable catalogs, brochures
  • Line Valves for UHP, Speciality and Cryogenic gases and fluids
    Last update: May 17, 2021
    Available in: en/fr
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