Armstrong 21-312AR Installatie en onderhoud - Pagina 3

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An unusual increase in system pressure may cause the

air vent to lock shut.

the

one that can handle the peak pressures.

Vent

Fails

3 .

Dirt may be lodged in the orifice.

the mechanism, the body, and the cap.

The valve and seat may be worn.

mechanism.

c .

There may be a leak in the float.

and shake it close to your ear.

inside you will be able to hear it sloshing.

the

collapsed.

For help with unusual installations or service problems, contact

your

Armstrong

Applications

Engineering

PLACEMENT OF LEVERAGE SYSTEM

1 .

Make sure the parts you have received are for the correct

orifice

size

for example) is stamped on the valve seat.

2 .

Remove the air vent cap and place it in a vise with the

mechanism up.

3 .

Disassemble the float and lever mechanism by removing the

valve lever pin and the valve seat.

4 .

Clean all dirt, pipe scale, and foreign materials from the

cap,

especially

5 .

Place the valve seat through the hole in the valve lever

clip and tighten both parts into the air vent cap.

valve

seat is tightened,

symmetrical with respect to the gasket surfaces to the left

and right of it and with respect to the centerline of the

The ears for the valve lever pin should be on the side

cap.

of the valve seat closest to the gasket surface (away from

the center of the cap).

NOT use pipe dope or lubricant on the valve seat threads.

seal is made, not by the threads, but by metal to metal contact

at the ground end of the valve seat.

in the cap is clean before screwing the valve seat into position.

6 .

Use the valve lever pin to assemble the valve lever to the

valve

lever

between the ears of the valve lever clip.

ARMSTRONG

increased

pressure

Tightly

float.

unlikely

possibility

Replace

Representative

Department.

for

your

from

the

clip.

The ears of the valve lever fit in

21AR

AND

21-312AR

Either eliminate the cause of

replace

(Leaks

Water).

that

the

float.

the

Armstrong

FOR NO. 21-AR.NO.

operating

pressure.

threaded

holes.

the lever

Make sure the seating area

AIR

VENTS

the

mechanism

Clean

the

Replace the whole

Disconnect

the

If liquid has leaked

Replace

the

float

Machine

The orifice size

When

clip should be

with

orifice,

float

has

Works

the

The