Lockshield

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An adjustable lockshield is located on the return on the underside of a radiator and is provided with a slotted screw or a hexagon socket. Often, for safety and optical reasons, a cover with a fiber seal is screwed on, which can be loosened by hand or with a wrench. The lockshield is sealed by a single O-ring on the valve stem.

The lockshield has the function of a throttle valve with which manual hydraulic settings are made possible, which allow hydraulic balancing . Screwing in the valve screw reduces the flow of heating water through the radiator, and screwing it out increases the flow. Furthermore, a lockshield allows a radiator to be dismantled without having to drain the water from the entire system. This is particularly advantageous for central heating systems in multi-storey buildings.

Lockable screw connections are used on the heating surfaces of heating systems and air conditioning systems. These screw connections allow individual shut-off, emptying and filling of z. B. radiators, in order to be able to carry out painting or maintenance work without interrupting the operation of other radiators. The regulating cone integrated in the screw connection enables hydraulic balancing by means of a fixed setting if no adjustable thermostatic valves are used in the inlet or if there are flow noises.

For this purpose, the reduced setting is distributed to both fittings in front of and behind the radiator. The presetting is reproducible, ie it is not changed when the lock is actuated. The settings for the kv / kvs values can be found in the corresponding diagram. A setting should, if possible, always be carried out in advance, because the lockshield is located in the "sump" of the radiator, which means that contamination can occur more quickly.

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