The Safety Block is one compact unit comprising of all the components required for easy assembly and dismantling the accumulator during servicing. A relief valve is installed for safety of the pressure line. It is recommended to use a safety block per accumulator. The principle of operation (shut-off) is based on a working principle of that of the ball valve. Each safety block is provided with a port for the pressure line coming from the pump, a port to connect the accumulator, a port for the drain and a port to connect a pressure gauge or for remotely monitoring the pressure. These safety blocks should not be used as flow control valves by placing the handle in the intermittent position and shall be used only in the extreme position (fully open or fully shut).