Sectional valves stated in other words sectional directional control valves are highly flexible and have various auxiliary valves such as anti-shock, anti-cavitation, electro hydraulic pilot operated unloader, hydraulic pilot unloader etc. Generally sectional valves have check valve for each work section are from 1 to 12 sections with open center, closed center hydraulic circuits. Various sections used together such as series, parallel or tandem circuit valve. Also sectional valves may have intermediate pump and tank sections.
Between two sections it is possible to add pressure or flow compensator. As described above Sectional valves have various options when compared to monoblock valves. However there are some disadvantages of the sectional valves is lower working pressure when compared to monoblock valves. Sectional valves maximum working pressure should be 320 bar. Total sizes of the sectional valves are not as compact as monoblock valves, some space limited applications do not prefer big valves as sectional valves.
Monoblock valves are simpler than sectional valves and monoblock valves can work under higher pressure. The body type of the valve permits higher pressure because of robust, covered structure. Sealing of monoblock valve are better than sectional valves so applications which uses higher pressure than 350 bar prefer monoblock valves. Burst pressure of the monoblock valves are around 700 – 900 bar so it can work safely under 350-400 bar. Mostly monoblock valves do not have auxiliary valves such as anti-shock or anti cavitation valves.
Hydraulic pilot control valves
Hydraulic pilot controls can be used in all valve series and most of the application sectors: joysticks for tele handlers, excavators and forklifts.
Pneumatic pilot control valves
These pilot control valves are normally used in industrial vehicles, as well as in travelling and tilting machinery.
Flexible cable remote controls
The valves activated with flexible cable remote controls are used mostly in agricultural machinery such as front-loaders, baling machines, brush cutters and silage choppers-mixers.