Brooks Instrument Control Valve - Manual (Page 15)

4-1
Section 4 Maintenance
Installation and Operation Manual
X-VA-8503-eng
Part Number: 541B087AHG
March, 2008
Needle Control Valves Models 8503 and 8504
4-1 Maintenance
The Brooks Model 8503 and 8504 NRS Valves require no maintenance when
installed in a dirt-free flow line.
Repair or disassembly of the valve in the field is not recommended. During
assembly parts are ultrasonically cleaned and "clean" room assembled for
trouble-free operation. DO NOT attempt to disassemble the valve.
If there is evidence that the valve has been disassembled in the field, the
factory warranty will be voided, and no credit will be issued.
The optional filter elements should be periodically inspected and
ultrasonically cleaned or replaced if necessary. When reinstalling the filter
elements use care to prevent any dirt or foreign matter from entering the
lines.
If problems are encountered with the operation of the valve, the complete
unit should be replaced or returned to the factory for servicing.