Datasheet

39
Series AF10-A to AF60-A
Valve seat
Bowl
Valve
Lever
Float
Chamber
Piston
Spring
Housing
Seal
Drain cock
:
;
.
@
=
2
B
>
8


Drain
Bowl
Valve
Lever
Float
Valve seat
Chamber
Piston
Spring
Housing
Seal
Drain cock
:
;
.
@
=
2
>
B
8


Drain
Bowl
Float
Lever
Valve
Valve seat
Knob
:
@
.
;
=
B
Drain
Working Principle: Float Type Auto Drain
• When pressure inside the bowl is
released:
Even when pressure inside the bowl q is re-
leased, spring y keeps the piston u in its up-
ward position.
This keeps the seal created by the seal !0 in
place; thus, the inside of the bowl q is shut off
from the outside air.
Therefore, even if there is an accumulation of
condensate in the bowl q, it will not drain out.
• When pressure is applied inside the
bowl:
Even when pressure is applied inside the bowl
q, the combined force of the spring y and the
pressure inside the bowl q keeps the piston u
in its upward position.
This maintains the seal created by the seal !0
in place; thus, the inside of the bowl q is shut
off from the outside air.
If there is no accumulation of condensate in the
bowl q at this time, the fl oat w will be pulled
down by its own weight, causing the valve r,
which is connected to the lever e, to seal the
valve seat t.
• When there is an accumulation of
condensate in the bowl:
The fl oat w rises due to its own buoyancy and
the seal at the valve seat t is interrupted.This
allows the pressure inside the bowl q to enter
the chamber i.
The result is that the pressure inside the cham-
ber i surpasses the force of the spring y and
pushes the piston u downward.
This causes the sealing action of the seal !0 to be
interrupted and the accumulated condensate in
the bowl q drains out through the drain cock !1.
Turning the drain cock !1 manually counter-
clockwise lowers the piston u, and causes the
seal created by the seal !00 to be interrupted,
thus allowing the condensate to drain out.
• When pressure inside the bowl is
released:
When pressure is released from the bowl q,
the piston u is lowered by the spring y.
The sealing action of the seal !0 is interrupted,
and the outside air flows inside the bowl q
through the housing hole o and the drain cock
!1.
Therefore, if there is an accumulation of con-
densate in the bowl q, it will drain out through
the drain cock.
• When pressure is applied inside the
bowl:
When pressure is 0.1 MPa or more, the force of
the piston u surpasses the force of the spring
y, and the piston goes up.
This pushes seal !0 up so that it creates a seal,
and the inside of the bowl q, is shut off from
the outside air.
If there is no accumulation of condensate in the
bowl q at this time, the fl oat w will be pulled
down by its own weight, causing the valve r,
which is connected to the lever e, to seal the
valve seat t.
• When there is an accumulation of
condensate in the bowl:
The fl oat w rises due to its own buoyancy and
the seal at the valve seat t is interrupted.
This allows the pressure inside the bowl q to
enter the chamber i. The result is that the
combined pressure inside the chamber i and
the force of the spring y lowers the piston u.
This causes the sealing action of the seal !0 to
be interrupted, and the accumulated conden-
sate in the bowl q drains out through the drain
cock !1.
Turning the drain cock !1 manually counter-
clockwise lowers the piston u, and causes the
seal created by the seal !0 to be interrupted,
thus allowing the condensate to drain out.
N.C. type: AD37-A, AD47-AN.O. type: AD38-A, AD48-A
Compact auto drain N.C. type:
AD17-A, AD27-A
• When pressure inside the bowl is
released:
Even when pressure inside the bowl q is re-
leased, the weight of the float w causes the
valve r, which is connected to the lever e, to
seal the valve seat t. As a result, the inside of
the bowl q is shut off from the outside air.
Therefore, even if there is an accumulation of
condensate in the bowl q, it will not drain out.
• When pressure is applied inside the
bowl:
Even when pressure is applied inside the bowl
q, the weight of the fl oat w and the differential
pressure that is applied to the valve r cause
the valve r to seal the valve seat t, and the
outside air is shut off from the inside of the bowl
q.
• When there is an accumulation of
condensate in the bowl:
The fl oat w rises due to its own buoyancy and
the seal at the valve seat t is interrupted.
The condensate inside the bowl q drains out
through the knob y.
Turning the knob y manually counterclockwise
lowers it and causes the sealing action of the
valve seat t to be interrupted, which allows
the condensate to drain out.