Bronkhorst FLOW-SMS Series - Manual (Page 14)

BRONKHORST HIGH-TECH B.V.
2.13.7 Needle Valves
- Removal
Ensure that the system is depressurised before taking the
needle valve apart.
Loosen the 4 bolts with hexagon head counter clockwise
to release the needle valve.
9.17.057 page 14
-
Replacement
Replace the gaskets AS‐007 and AS‐017,Viton,
EPDM or Kalrez.
All wetted parts have to be absolutely clean, don’t use oil
or grease and avoid dust!
Replace the needle valve centre before tighten the bolt
with hexagon head by turning clockwise, tighten crosswise
with M3 0,9 Nm.
Now the needle valve has to be tested for leakage and function.
- Adjustment
The needle valves are adjustable
with a slotted headscrewdriver to adjust the flow.
The NV‐01 is also lockable with a
nut because the fine adjustability.
Available Needle valves
Model number Description
NV‐01 Kvmin 1.0x10 ‐3 ,Kvmax 6.8x10 ‐3 Low flow needle valve, fine
NV‐02 Kvmin 5.6x10 ‐3 ,Kvmax 5.6x10 ‐2 High flow needle valve, coarse
2.13.8 Pneumatic operated shut off valves NC or NO
The actuating pressure has to be supplied with a 3/2 way valve.
When the valve is not actuated the air actuation input has to vent.
Actuation pressure
:
Minimal : 3 bar(g).
Maximal : 9 bar(g).
-
Removing
Ensure that the system is depressurised before taking
the pneumatic shut off valve apart.
Remove the actuating pressure tubing and loosen the 4 bolts
with hexagon head counter clockwise to release the valve.
-
Replacing
Replace the gasket AS‐007 and AS‐017, Viton, EPDM or Kalrez.
All wetted parts have to be absolutely clean, don’t use
oil or grease and avoid dust!
Replace the pneumatic shut off valve and tighten the
bolts with hexagon head by turning clockwise, tighten
crosswise with M3 0,9 Nm.
Replace the actuating pressure tubing.
Now the pneumatic shut off valve has to be tested for leakage and function.
Available Pneumatic shut off valves
Model number Description
PV‐01‐NC‐V Kv=0,20 Normally Closed Viton
PV‐01‐NC‐E Kv=0,20 Normally Closed EPDM
PV‐01‐NC‐K Kv=0,20 Normally Closed Kalrez
PV‐01‐NO‐V Kv=0,20 Normally Open Viton
PV‐01‐NO‐E Kv=0,20 Normally Open EPDM
PV‐01‐NO‐K Kv=0,20 Normally Open Kalrez