Samson S2000 Instruções de Operação descarregar pdf (Página 41)

4.8 Attaching positioners with

stainless steel housings

Positioners with stainless steel housings re

-

quire mounting parts that are completely

made of stainless steel or free of aluminum.

Note: The pneumatic connecting plate and a

pressure gauge bracket made of stainless

steel are available (order numbers listed be

-

low). The Type 3710 Pneumatic Reversing

Amplifier is also available in stainless steel.

Connecting plate

(stainless steel):

G ¼

¼ NPT

1400-7476

1400-7477

Pressure gauge

bracket (st. steel):

G ¼

¼ NPT

1400-0265

1400-7108

The Tables 1 to 5 (pages 42 to 45) apply for

attaching positioners with stainless steel

housings with the following restrictions:

Direct attachment

All mounting kits from Tables 1 and 2 can

be used. The connection block is not re

-

quired. The stainless steel version of the

pneumatic connecting plate routes the air in

-

ternally to the actuator.

Attachment according to IEC 60534-6

(NAMUR rib or attachment to rod-type

yokes)

All mounting kits from Table 3 can be used.

Connecting plate in stainless steel.

Attachment to rotary actuators

All mounting kits from Table 5 can be used

except for the heavy-duty version. Con

-

necting plate in stainless steel.

4.9 Air purging function for

single-acting actuators

The exhaust air from the positioner is di

-

verted to the actuator spring chamber to

provide corrosion protection inside the actu

-

ator. The following must be observed:

Direct attachment to Type 3277-5 (stem ex

-

tends FA/stem retracts FE)

The air purging function is automatically

provided.

Direct attachment to Type 3277, 175 to

750 cm

2

FA: Remove the stopper 12.2 (Fig. 5 on

page 19) at the connection block and

make a pneumatic connection to the

spring chamber on the vented side.

NOTICE

The method described does not apply to

old connection blocks in powder-

paint-coated aluminum. In this case,

follow the instructions for attachment

described below in “Attachment acc. to

IEC 60534-6 (NAMUR rib or

attachment to rod-type yokes) and to

rotary actuators”.

FE: The air purging function is automati

-

cally provided.

Attachment acc. to IEC 60534-6 (NAMUR

rib or attachment to rod-type yokes) and to

rotary actuators

The positioner requires an additional port

for the exhaust air that can be connected

EB 8384-4 EN 41

Attachment to the control valve – Mounting parts and accessories

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