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© 11.2023
12.7 Baffle Plate / Restrictor Plate
12.7.2 Application / Function
If the outlet pressure of the regulator varies too much, this can be remedied by installing
restrictor and baffle plates in the breather line or the impulse (measurement) line.
A set of the restrictor and baffle plates is located in the sealing cap (item 7) on the spring cap (item 4) of the regulator.
12.7.1 Use
• On regulators (pilots)
12.7.3 Mounting
1. Remove the throttle and baffle plates by unscrewing the sealing cap (item 7) from the regulator and then the locking
screw (item 8) from the sealing cap (item 7).
2. Installation of the restrictor plate in the breather line
First the restrictor plate (item 9) is installed in the breather line.
The restrictor plate is installed behind the Ermeto screw fitting (item 5) in the bore of the diaphragm hood top (item
3).
Screw the sealing cap (item 7) again onto the spring cap (item 4) and put the gas regulation section into operation
again. If the installation of the restrictor plate (item 9) has given the desired result, the outlet pressure no longer
varies, and the regulator reacts as desired, continue with item 4. If it has given the desired result, continue with item
3.
The restriction must not make the regulator so sluggish that the SSV drops when starting or switching off the gas
regulation section.
8
4
7
9
11
10
12
7
3. Installation of the baffle plates in the impulse line
The regulator flow can be restricted by installing a baffle plate (items 10, 11 or 12) in the impulse line.
To do so, the ball valve upstream of the gas pressure regulator must be closed, and the gas regulation section must
be depressurized by discharging the gas to the atmosphere as prescribed (see operating manual). The baffle plate
(item 10) is then installed in the impulse line between the Ermeto screw fitting (item 6) and the impulse line and
screwed down again. The gas regulation section is then put into operation as specified (see operating manual).
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