Clarke FG2000 Spezifikationen PDF herunterladen (Seite 6)

Prismatic and Flat Glass Gages

BEFORE YOU INSTALL THE GAGE GLASS:

- Support brackets should be considered for gages over four feet long and

weighing in excess of 100 pounds. The support brackets will helpprevent

overloading of the connecting valves and piping. The brackets will also help

prevent damage caused by excessive vibration.

- While the advantage of using automatic ball check valves ahead of a level gage

is evident, the principal disadvantage is the check valves will prevent effective

blow-down of the gage itself. When the level gage drain valve is opened,

pressure inside the level gage drops, and the check valve balls are driven into

the almost closed positions by system pressure.

- Confirm that the gage glass model number and the pressure rating, which can

be found on the nameplate, meet the required specifications and design

conditions for the application.

Maintenance

Water Gage Removal Procedure

This procedure applies to all Clark-Reliance water level gages with nipple end

connections. Nipple end connected water gages are designed in various models to

service pressure up to 1500 PSIG (103.4 BarG) saturated steam applications.

Water gages designed for use with bronze water gage valves have an overall length

of 2 ¾” (70mm) less than the design of the water gage valve centers. Water gages

designed for use with steel water gage valves have an overall length of 3 ¼”

(82.5mm) less than the design of the water gage valve centers.

1) Isolate the water gage valves and open the drain valve.

2) Remove the packing yoke bolts on steel valves. On bronze valves loosen

the nipple packing nut.

3) Grasp the water gage firmly and push up into the upper (steam) valve. This

action will disengage the water gage from the lower (water) valve.

4) Carefully swing the water gage off to one side and drop it out from the steam

valve.

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Clarke FG2000 Spezifikationen Seite 6