Installation and operation manual – Brooks Instrument Control Valve User Manual
Page 12

2-4
Section 2 Installation
Installation and Operation Manual
X-VA-8503-eng
Part Number: 541B087AHG
March, 2008
Needle Control Valves Models 8503 and 8504
2-9 Panel Mounting NRS Valve With Digital Handle (Reference Figure 2-1)
a. Open the valve by rotating the knob (19) counterclockwise until stop is
reached.
b. Loosen four set screws (22) and remove counter housing (23) from
bonnet nut (20).
c. Loosen bonnet set screw (24) and remove bonnet nut (20) and front
panel nut (15F) from bonnet (12).
d. From rear of panel, insert the valve bonnet into the panel opening. The
amount of valve protrusion is controlled by adjusting rear panel nut (15R).
e. Install and tighten front panel nut (15F).
f.
Install and tighten bonnet nut (20) and tighten set screw (24).
g. Install counter housing (23) on bonnet nut (20). Make sure digits indicate
150. Tighten four set screws (22).
h. Connect the inlet and outlet connecting lines to the valve body.
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