Samson S2000 Instruções de Operação descarregar pdf (Página 22)

4.3 Attachment according to

VDI/VDE 3847

Type 3730-4xxxxxxxx0x0060xx and

Type 3730-4xxxxxxxx0x0070xx Positioners

with air purging of the actuator's spring

chamber can be attached according to

VDI/VDE 3847.

Type 3730-4xxxxxxxx0x0000xx Positioner

without air purging of the actuator's spring

chamber can be attached according to

VDI/VDE 3847.

This type of attachment allows the

positioners to be replaced quickly while the

process is running by blocking the air in the

actuator.

The signal pressure can be blocked in the

actuator by unscrewing the red retaining

screw (20) and then turning the air blocker

(19) on the bottom of the adapter block.

Attachment to Type 3277 Actuator (see

Fig. 7)

Refer to Table 4 on page 44 for the required

mounting parts as well as the accessories.

Mount the positioner on the yoke as shown

in Fig. 7. The signal pressure is routed to the

actuator over the connecting plate (12), for

actuators with fail-safe action "actuator stem

extends" internally through a bore in the

valve yoke and for "actuator stem retracts"

through external piping.

Only the Y1 port is required for positioner

attachment. The Y2 port can be used for air

purging of the spring chamber.

1. Place follower clamp (3) on the actuator

stem, align and screw tight so that the

mounting screw is located in the groove

of the actuator stem.

2. Place the adapter bracket (6) on the

positioner and mount using the screws

(6.1). Make sure that the seals are cor

-

rectly seated. For positioners with air

purging, remove the stopper (5) before

mounting the positioner.

For positioners without air purging, re

-

place the screw plug (4) with a vent plug.

3. For actuators with 355/700/750 cm²,

remove the follower pin (2) at lever M

(1) on the back of the positioner from

pin position 35, reposition it in the bore

for pin position 50 and screw tight.

For actuators 175, 240 and 350 cm²

with 15 mm travel, the follower pin (2)

remains in pin position 35.

4. Insert formed seal (6.2) in the groove of

the adapter bracket.

5. Insert the formed seal (17.1) into the

turnboard (17) and mount the turnboard

to the adapter block (13) using the

screws (17.2).

6. Mount the blank plate (18) to the

turnboard (17) using the screws (18.1)

Make sure that the seals are correctly

seated.

Note: A solenoid valve can also be mounted

in place of the blank plate (18). The orienta

-

tion of the turnboard (17) determine the

mounting position of the solenoid valve. Al

-

ternatively, a restrictor plate can be mounted

(see AB 11 EN).

22 EB 8384-4 EN

Attachment to the control valve – Mounting parts and accessories

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