The Chell EMV is a development of the well established
Hastings flow controller valve and retains all of the advantages
of this design. The internal dimensions are considerably smaller
than other valves which brings benefits such as smaller wetted surface
area, lower mass and thus less armature inertia - faster response
time and less overshoot. The opportunity has been taken to reduce
the number of seals and exposed screw threads, resulting in a cleaner,
welded construction. The EMV may be used either as a system inlet
controller or as an exhaust throttle valve.
Specifications
Type of valve:
Proportioning, electromagnetically operated
Wetted materials:
S316 Stainless Steel and Viton®* or Kalrez seals
Standard fittings:
Male 4 VCR - others on request
Leak integrity:
External:
Shut-off:
<1 x 10-9 Torr litre/sec
<1 x 10-7 Torr litre/sec
Electrical drive signal:
0 - 14.5 Vdc, l60mA
Flow ranges - inlet
(for P >1 5lbf/in2):
10, 50, 100, 500 sccm 3, 5, 10, 30 slpm
Flow ranges - exhaust
(for P <15lbf/in2):
as above, plus 50 slpm
Control resolution:
1 x 10-4 Full Scale
Length across VCR faces:
85mm
*Viton® is
a registered trademark of Dupont Performance Elastomers
