Bellows low to high pressure valve for HP, UHP, cryogenic gases and fluids – K900

K900 is a stop globe valve with replaceable bellows sealing. It is dedicated to low pressure at cryogenic temperature and can be actuated by a manual handwheel or a pneumatic actuator. The valve is ideally suited for liquid nitrogen and liquid oxygen, pure and ultra pure gases or liquids, combustible gases or liquids, oxidizings gases or liquids, toxic and corrosive gases or liquids, radioactive gases or liquids and noble gases or liquids.

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
Cryogenic extension

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CONSTRUCTION MATERIAL

	Parts	Material
Wetted parts	Body	SS 316L
	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
K908	8mm	0.78	30 bar
K912	12mm	3	100 bar
K920	20mm	7	100 bar
K932	32mm	18	30 bar
K950	50mm	45	30 bar
K980	80mm	114	15 bar

All specifications subject to change without notice

MANUAL DIMENSIONS

MAN.	K908 LPMI	K912 LPMI	K912 HPMI	K920 LPMI	K920 HPMI	K932 LPMI	K950 LPMI	K980 LPMI
C	37mm (1.46")	49mm (1.93")	49mm (1.93")	49mm (1.93")	49mm (1.93")	45mm (1.77")	41mm (1.61")	629mm (24.76"
O	38.5mm (1.52")	53mm (2.09")	53mm (2.09")	54mm (2.13")	54mm (2.13")	57mm (2.24")	53mm (2.09")	641mm (25.24")
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	35mm (1.38")	50mm (1.97")	100mm (3.94")	50mm (1.97")	100mm (3.94")	125mm (4.92")	125mm (4.92")	300mm (11.81")
He	181mm (7.13")	289mm (11.38")	289mm (11.38")	298mm (11.73")	298mm (11.73")	537mm (21.14")	563mm (22.17")	-
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.	K908 LPNC/LPNO	K912 LPNC/LPNO	K912 HPNC/HPNO	K920 LPNC/LPNO	K920 HPNC/HPNO	K932 LPNC/LPNO	K950 LPNC/LPNO	K980 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	227mm (8.94")	346mm (13.62")	375mm (14.76")	384mm (15.12")	410mm (16.14")	665mm (26.18")	690mm (27.16")	794,5mm (31.26")
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 refrence only and are subject to change without notice

Specifications

Fluid media	Standard, high and ultra high purity and corrosive gases or liquids
Pneumatic actuator operating pressure	0.5 - 0.7 MPa (5 - 7 bar)
Temperature range	77.15 K to 523.15 K (-196°C to +250°C)*
Flow capacity (cv)	See table above
Nominal seat diameter	See table above
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
Max. working pressure	See table above

Dimensional drawings

Product Configurator

	Size	Pressure-range (1)	Actuation	Body material	Seat material	End-connection (2)	Surface finish	Options (3)
K9	08	LP	MI	I	/K	BWO	-	-
	Seat Ø8mm 08 Seat Ø12mm 12 Seat Ø20mm 20 Seat Ø32mm 32 Seat Ø50mm 50 Seat Ø80mm 80	Low pressure (15/30 bar version) LP High pressure (100 bar version) HP	Manual MI Pneumatic normally open NO Pneumatic normally closed NC	SS316L I	PCTFE /K PI (Vespel®) /V	Butt welded orbital BWO Butt welded BW Socket welded SW Metal face seal - Male MV Metal face seal - Female FV	Ra 0.8µm - Ra 0.4µm (electropolished) EP4 Ra 0.25µm (electropolished) EP2	No option - Bottom support FP Actuator vent for H2 H2 Solenoid valve EV Double limit switches MRE2 Proximity sensors (ATEX) DPI2 Purge port (2) PGP

I am interested

(1) High-pressure version available for K912 and K920
(2) Size to be defined by customer and ROTAREX
(3) Combinable

Downloadable catalogs, brochures

Line Valves for UHP, Speciality and Cryogenic gases and fluids

Last update: Sep 02, 2024
Available in: en/FR/CN/KR