6
Replacing the Valve Insert
Type: 382 SP/ 382LP/ 382 HP
681 SP/ 481 SP/ 682 SP/ 482 SP /
681 HP/ 481 HP/ 682 HP/ 482 HP
1. Remove plastic protective cap; loosen counter-nut (do not unscrew!).
2. Tension spring by turning the setting spindle counter-clockwise.
3. Unscrew spring housing or remove screws.
4. Remove spring housing, spring plate, setting spindle, copper ring and spring
(only for Fig. 681/481/682/482 DN15-DN50) .
5. Lever-out the complete valve insert ( fig. a) and replace with a new one. In the
case of 682/482 DN65 - DN100 r e-fit two screws on opposite sides of the body,
as these are required as supports for the screwdrivers ( fig. b).
6. Installation is carried-out in reverse order. Observe the torques in section 2.
Fig. a):
Removing and installing the valve insert 681/481/682/482 (DN15 - DN50).
Fig. b):
Removing the valve insert 682 / 482 (DN65 - DN100).
Fig. c), d): Removing the valve insert 382.
Type: 681 LP/ 481 LP/ 682 LP/ 482 LP:
1. Remove plastic cap, release lock nut (do not unscrew!).
2. De-tension the spring by turning the setting spindle clockwise.
3. Release and unscrew bonnet with open end spanner.
4. Remove spring and slide ring.
5. Release and unscrew hexagon nuts with open end spanner and screwdriver
(fig. e).
6. Remove spring seat.
7. Loosen membranes on the outer figmeter along entire length with a screwdriver
and unscrew (fig. f).
8. Loosen and unscrew low-pressure adapter with hook spanner (optional
accessory) (fig g).
9. Remove O-ring seal.
10. Screw the hexagon nuts back onto the threaded bolts. Position two screwdri-
vers (used as lever) on the housing and in the groove of the hexagon nut, and
pull out the valve insert (fig. h)
11. To assemble, repeat the sequence in reverse order (see fig. i).
Assembly and maintenance instructions - 382, 481/681, 482/682 | Version: 06/2023 · V02
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