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EX-FLOW M ASS F LOW C ONTROLLERSFOR G ASES

G

ENERAL

To convert a mass flow meter to a mass flow controller,a control valve is added. The instruments of the modelseries F-111X and F-112AX can be supplied with a close coupled separate valve. The electrical connectionof flow meter and control valve to the intrinsically safeE-7000 readout system is done with separate cables.The readout system contains a controller function p.c.board to complete the control loop.The instruments starting with a figure 2 in the modelnumber (that is F-203AX thru F-216BX) are mass flowmeters and control valves integrated in one base block.The electrical connection is the same as for separatevalves.

D

IMENSIONALDRAWING

C

ONTROL

V

ALVE

C M H L A K B

C

D
IMENSIONS (
MM )W
EIGHT

ONTROL

V

ALVES

M
ODEL ABCHKLM(
KG )

Are available in two different types of protectiondetermined by the coil: Coil XB: protection II 1 G/D EEx ia IIC T6, requires anintrinsically safe power supply.

F-001AC 47100508225251060,5 F-002AC 781315011059531061,5

Coil XC: protection II 2 G/D IP6X T 130°C EEx me IIT4, encapsulated, no intrinsically safe powersupply required.

F-003AC 971675012474671063,2 F-003BC 1141975014189841065,1 F-033C 771305011869551062,3 F-042C 129-506699761066,6
Dimensions of control valves with XB-coils are identical, only dimension M=104 mm.

D

IRECT

A

CTING

V

ALVES

F-001AC D

IMENSIONALDRAWING

M

ASS

F

LOW

C

ONTROLLER

Consist of a valve module that can be mounted into abase block. This may be a separate valve F-001AC-X, oran MFC (F-203AX, F-206AX/BX, F-213AX or F-216AX/BX). In the larger valves/controllers this valvemodule is used as a pilot valve (see below).

C H

V

ARY

-P V

ALVE

F-033C, F-042C

Are 2-stage control valves, pressure rating 700 bar max.The pilot valve acts as described above. The secondstage is a patented pressure compensation valve. Thesevalves maintain a constant

L

∆ P of 4 bar across the firststage. Thanks to this feature both inlet- and outletpressures may change without affecting the functioningof the Vary-P-Valve.

A K B D
IMENSIONS (
MM )W
EIGHT M
ODEL ABCHKL(
KG ) F-203AX/F-213AX 1712408217274675,5

P

ILOT

-O

PERATED

V

ALVES

F-002AC, F-003AC ,F-003BC

F-206AX/F-216AX 2333038219674677,5

Are indirect-acting valves that make use of a complete Vary-P-valve (as described above) as a pilot. Thanks tothis unique construction they are also pressure com-pensated. The pilot controls the pressure on rear sideof a spring loaded cylinder, of which the front side isexposed to the inlet pressure of the main valve. The cylinder provides the positioning force for the mainvalve. In case the pressure difference is bigger than the spring force, the main valve opens. Block diagrams of the various valves are found in theEL-FLOW brochure.

F-206BX/F-216BX 25133782214898410,7 F-230MX/F-231MX/ F-232MX 1151698216169564,1 F-240MX/F-241MX/ F242MX 153-8218199768,7

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