Emerson Fisher 4320 Manuel d'instructions télécharger pdf (Page 25)

Instruction Manual

D103621X012

4320 Position Monitor

April 2014

Never plug, block or restrict port 5 as any blockage or restriction may cause an internal pressure buildup inside the

enclosure, resulting in damage to the housing gasket.

Install the supplied vents in the exhaust ports (ports 3 and 5) to prevent debris from falling into the spool valve. Apply a

general purpose instant sealant to pipe threads and fittings. A flow control, such as a needle valve, may be used in Port

3, but should never be used in Port 5. To achieve IP67 protection, remote venting of ports 3 and 5 is required.

Figure 18. 4-Way Spool Valve Installation

NOTE:

1 THE DD POINTS TO THE PILOT VALVE PORTS AND NOT SPECIFICALLY TO THE

SPOOL VALVE PORTS.

EXHAUST OF PORT 2

(WHEN ACTUATOR CLOSED)

EXHAUST OF PORT 4

(WHEN ACTUATOR OPENS)

SUPPLY

PORT TO

ACTUATOR CLOSE

PORT TO

ACTUATOR OPEN

ALWAYS INSTALL

VENTS (SUPPLIED)

ALWAYS INSTALL

VENTS (SUPPLIED)

PLUG

PORT TO OPEN/CLOSE

PORT TO CLOSE PORT TO OPEN

SUPPLY

FAIL LAST POSITION

5 1 3

4 2

DOUBLE-ACTING ACTUATORS SPRING RETURN ACTUATORS

5 1 3

4 2

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 67 68

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Emerson Fisher 4320 Manuel d'instructions Page 25