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Pressure-reducing valve Unloading valve Counterbalance valve Pressure-relief valve
main stem stop valve auxiliary steam stop valve feed check or control valve blow down valve
injection valve relief valve discharge valve inlet filter
Reduce the pumping rate by closing the deck filling valve Close all overflow valves Place 5 gallon containers under all flange connections in the fuel line Reduce the pumping rate and sound tanks frequently as the level rises
overflow valve reducing valve relief valve sequence valve
the direct acting relief valve is used for controlling lower flows and pressure the pilot operated relief valve is used for controlling higher flows and pressure the pilot operated relief valve is used for controlling lower flows and pressure the controlling accuracy of direct acting relief valve is worse than that of the pilotoperated relief valve
reduce wear on the valve stem permit the use of alloy valve seat materials reduce heat transfer from the valve seat facilitate valve removal for servicing
flame relief valve flame stopper safety valve flame arrester
the stem and heads are made of different material low-alloy steel is used throughout a replaceable valve disk is welded to the head the self-centering action comes from motion of the valve stem in the guide
Holding the valve open for a long period Increasing the starting air pressure used Opening the stating air valve quickly Reducing the starting air valve size
A gate valve A globe valve Any check valve Any needle valve
The blow down valve The scum valve The air release cock Scot-blower
The blow down valve The scum valve The air release cock The soot-blower
Special tools are required for lapping or grinding It is impossible to throttle flow with a butterfly valve To close the valve, it is only necessary to turn the handle a quarter of a turn The butterfly valve should never be used in a freshwater system
close the static leg filling valve close the overflow tank falling valve reduce the fuel oil pumping rate stop the fuel oil pumping operation
Relief valve Direction control valve Stop valve Pressure control valve
with the axis of the solenoid horizontal, sensing temperature of the box, and upstreamof the thermal expansion valve upright, sensing temperature of the box, and upstream of the thermal expansion valve upright, sensing temperature of the box, and downstream of the thermal expansion valve upright, sensing heat of the tail coil, and upstream of the thermal expansion valve
one valve seats upwards, while the other seats downwards the reed valves used on the discharge are made substantially thicker and heavier thanthe suction valves the suction valve springs exert a greater tension than the discharge valve springs the discharge valve springs exert a greater tension than the suction valve springs
Relief valves Check valves Safety valves Reducing valve
Overflow valve Reducing valve Balancing valve Reducing valve or balancing valve
湘公网安备 43130202000226号