Vent Connection - Emerson Fisher 3610J Instruction Manual

Instruction Manual
D200149X012
Figure 9. FlowScanner
™
Connections for Fisher 3610J and 3610JP Positioners
GAUGE
STEM PROVIDED
WHEN GAUGE
IS SPECIFIED
BODY PROTECTOR
BODY
NOTE:
1 BODY PROTECTOR AND BODY NOT
REQUIRED WITH THE 3610J POSITIONER.
12B8050‐A
A6081‐1

Vent Connection

3610J and 3620J positioner relays exhaust actuator pressure through the positioner case and into the 1051, 1052,
1061, and 1069 actuator housings. These actuator housings provide a 1/4 NPT connection and a screen is normally
installed in this connection to prevent blockage from debris or insects. Restricting this vent area can produce a
pressure buildup in the case and degrade positioner performance. There is also a 1/4 NPT connection on the 3622
converter housing where the vent (key 28) is installed. 585, 585R, 585C, and 585CR actuators do not have a 1/4‐inch
vent connection.
WARNING
Personal injury or property damage could result from fire or explosion of accumulated gas if a flammable gas is used as the
supply pressure medium and the positioner/actuator is in an enclosed area. The positioner/actuator assembly does not
form a gas‐tight seal, and a remote vent line is recommended. However, a remote vent line cannot be relied upon to
remove all hazardous gas, and leaks may still occur. Provide adequate ventilation and necessary safety measures. Vent line
piping should comply with local and regional codes and should be as short as possible with adequate inside diameter and
few bends to reduce case pressure buildup.
WARNING
3620J, 3620JP, 3621JP positioners and the 3622 electro‐pneumatic converter do not meet third party approvals for use with
natural gas as the supply medium. Use of natural gas as the supply medium can result in personal injury or property
damage from fire or explosion.
If a remote vent is required, the vent line must be as short as possible with a minimum number of bends and elbows.
Vent line piping should have a minimum inside diameter of 19 mm (3/4 inches) for runs up to 6.1 m (20 feet) and a
minimum inside diameter of 25 mm (1 inch) for runs from 6.1 to 30.5 meters (20 to 100 feet).
Diagnostic System Figure 10. FlowScanner Diagnostic System
Connections for Fisher 3621J and 3620JP Positioners
GAUGE
STEM PROVIDED
WHEN GAUGE
IS SPECIFIED
BODY PROTECTOR
BODY
NOTE:
1 BODY PROTECTOR AND BODY NOT
REQUIRED WITH THE 3620J POSITIONER.
12B8051‐B
A6083‐1
3610J and 3620J Positioners
September 2017
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