beautypg.com

Installation and operation manual – Brooks Instrument Control Valve User Manual

Page 12

background image

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.