Dosapro Milton Roy G A Series, Инструкция по эксплуатации, Страница: 21 / 40

VII - 2
B1. Removing the valve assemblies
See Figure 7.2c.- 7.2d
1. For the discharge circuit: Unscrew the
valve assembly body [14] (or the 4-
function valve body). Remove the spring
[3], ball [4] and ball seat [5] (and mark the
direction of fitting).
2. For the suction circuit: Unscrew the valve
assembly body [13]. Hold the body in the
vertical position to avoid losing the ball
[4]. Remove the spring [3], ball and ball
seat [5] (and mark the direction of fitting).
3. Clean the tapped holes in the liquid end
[10].
4. Clean the body, seat and ball assemblies.
In case of wear, proceed with the
replacement of the « seat - ball »
assemblies or the valve assemblies.
Discharge Suction
4 Ball
5 Ball seat
6 Valve assembly body
10 Liquid end
14 Valve assembly body
Fig. 7.2c : Sectional drawing of valve assy
ischarge Suction
3 Spring
4 Ball
5 Ball seat
10 Liquid end
13 Valve assembly body
14 Valve assembly body
Fig. 7.2d : Sectional drawing of valve assy
B2. Reinstalling the valve assemblies
See Figure 7.2a.
1. Insert a washer [e] and a cartridge [c]
(taking care to comply with the direction
of fitting) in the valve assembly body [6
(or the 4-function valve body)].
2. Screw the valve assembly body [16] (or
the 4-function valve body) into place
without torquing.
B2. Reinstalling the valve assemblies
See Figure 7.2b.
For each valve assembly:
1. Insert the balls ([5] and {4]) and the ball
stop [3] into the valve assembly body [6]
(taking care to comply with the direction
of fitting).
2. Fit a seal [2] on the ball stop and a seal [2]
under the valve assembly body.
3. Screw the valve assembly body onto the
liquid end body [10]. Tighten to a torque
of 20 m.N.
4. Tighten the union [1] (to a torque of 20
m.N).
B2. Reinstalling the valve assemblies
See Figure 7.2c-7.2d.
For the discharge circuit:
1. Insert a ball seat [5] in the liquid end [10]
(taking care to comply with the direction
of fitting). Insert a ball [4]. Insert a spring
[3] in the valve assembly body [14] or the
4-function valve body.
2. Screw the valve assembly body or the 4-
function valve body into place without
torquing (complying with the arrow
indicating the direction of flow of the
liquid).
3. Tighten by 1/8 of a turn to ensure leak-
tightness.
For the suction circuit:
1. Install a spring [3] in the liquid end body
[10]. Fit a ball seat [5] (taking care to
comply with the direction of fitting) and a
ball [4] on the valve assembly body [13].
2. Screw the valve assembly body into the
liquid end [10] without torquing
(complying with the arrow indicating the
direction of flow of the liquid).
3. Tighten by 1/8 of a turn to ensure leak-
tightness.
V
V
S
H
>45l/h
P-D
>45l/h
P-D
>45l/h
P-D
≤
45l/h
P-D