Operating Instructions for ROCO Butterfly Valve
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BA50E103
Issue 02/06
REV 2
ERHARD-Armaturen
x
D-89502 Heidenheim
x
Postfach 1280
Phone +49 (0)7321 320-0
+49 (0)7321 320-525
e-mail: info
@
erhard.de Internet: http://www.erhard.de
Page 7/13
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Remove remaining sealing parts.
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Clean space of installation.
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Slightly grease 0-ring (23), insert into groove on the backside of the new 0-ring
(22) and press spacer with 0-ring into the installation space until reaching the
stop.
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Insert the second O-ring into the groove between body and spacer.
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Assemble shaft sealing system one after the other as follows:
Back-up ring/O-ring/back-up ring/O-ring/back-up ring (24, 25) taking care that the
O-rings at the parallel key groove of the shaft will not be damaged.
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Mount retaining ring (19) with cylindrical screw (20).
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Mount gearbox/part-turn actuator (see chapter 7).
Bearing Side:
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Dismount bearing cover (11) by unscrewing the hexagon screws (13).
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Remove old O-ring (12) from the groove of the bearing cover.
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Clean O-ring groove.
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Insert new O-ring (12) and remount bearing cover (11) . During mounting see to it
that the O-ring is retained in the groove and is not jammed between body and
bearing cover.
7 SKG Slider-crank Mechanism
7.1 Design Features
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Design (Figure 4):
Attachable quarter-turn gearbox according to the slider-crank
principle. The rotation of the stem (2) is changed into a swinging movement of the
gearbox crank by means of the stem nut (5) and the gearbox bracket (8) (articulated
lever). The gearbox crank is rigidly connected to the valve shaft by means of the
output shaft. The slider-crank mechanism is irreversible.
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Cast iron encapsulated gearbox case totally enclosed (enclosure rating IP 68).
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Interfaces:
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Output: to prEN 12116 (DIN ISO 5211), round spigot with parallel key.
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Input: flanged bearing with round trunnion for receiving the handwheel, chain
wheel, extension stem or underground installation set or flange to DIN 5210, shape
B1 (plug socket) for connecting an electric multi-turn actuator.
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Limit stops:
Solid stop nut (6) on the stem (2). ”CLOSED” position is adjustable.
Exceeding load will be absorbed by the stem and does not affect the case
components of the gearbox. Maximum input torque: 450 Nm (in the limit positions).
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Position indicator:
The indicator which is directly connected to the valve shaft is
visible through a sight glass on the gearbox case. The sight glass is made of impact
resistant polycarbonate (PC) and thus suitable for plant, pit, and underground
installation.
