FR1538109A
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Method and device for adjustment, control or servo-control
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DE1247794B
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Safety device for engine valves or the like, especially for district heating systems
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DE1253429B
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Control device for heating systems, especially those that are fed from a district heating network
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DE1135185B
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Adjustable fine throttle for pressure medium operated control and measuring devices
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DE854133C
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Control valve
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DE847238C
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Control valve
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DE910607C
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Servomotor for controller, especially for pressure or temperature controller
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DE814978C
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Control valve with piston balanced single-seat valve cone
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DE888634C
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Control valve
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DE765823C
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Two-way valve with three valve connection spaces
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DE618715C
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Regulating device for liquid thermostats
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DE616150C
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Thermostat for fluid heat regulator
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DE467481C
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Steam trap with float lever control and double seat valve
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