4 Valve Description
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BOA-CVE C/CS/W/IMS/EKB/IMS EKB
Actuators (technical data refers to basic configuration):
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Configurable, microprocessor-controlled actuators
Power supply: 24 V AC/DC
Position setpoint: 2 - 10 V DC
Actual-position feedback value: 2 - 10 V DC
Control valve characteristic: linear
Leakage rate 0.05 % of Kvs
Limit switching force-dependent in closing direction and stroke-dependent in
opening direction
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3-point actuators
Power supply: 230 V AC
Actual-position feedback: 2 limit switches
Leakage rate A to DIN EN 12266-1, drop-tight
Stopping via limit switches in closing direction and opening direction
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Actuating time and actuating speed can be freely selected as a function of
actuator type and Kv
s
value.
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Operating data stored in permanent memory
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After a power failure, operation is resumed in accordance with the operating
data.
Variants
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Actuator configured to match the order specification
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Integrated process controller
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Power back-up unit
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Heating of the motor space
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Other supply voltages on request
4.5 Function
Design
The control valve consists of a single-piece bonnetless pressure-retaining body 100,
the functional unit (stem 200 and valve disc 350) and the actuating element
(actuator). Stem 200 runs in special plastic bearings. This ensures that the movement
of stem 200 cannot be impaired by corrosion products. A seal ring at the valve/
actuator interface prevents any ingress of dirt.
Function
It is operated by an electric actuating element (actuator).
Sealing
The stem seal is maintenance-free and does not require re-tightening.
4.6 Scope of supply
The following items are included in the scope of supply:
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Control valve
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Valve operating manual
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Actuator operating manual
4.7 Noise characteristic
When operated within the operating conditions documented in the order
confirmation and/or characteristic curves booklets, the valve will not exceed a sound
pressure level of 80 dB in acc. with IEC 60534-8-4. Unfavourable piping layouts or off-
design operating conditions may give rise to physical phenomena like cavitation,
resulting in significantly higher sound pressure levels.
