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Logic elements

A logic element is a type of hydraulic valve that is used as a logic gate where a control signal tells how the logic element should react. They are used in a variety of hydraulic circuits and systems, and combined with other valves they can create functions for directional control, flow control and pressure control. Logic elements are available in both balanced and unbalanced versions.

Balanced logic elements are not affected by the load

Balanced logic elements are not affected by the load in the system, they only react to the control pressure. They are used, for example, when you want to be able to open or close the valve regardless of the load.

Unbalanced logic elements does not require an external pilot source

Unbalanced logic elements are affected by the load in the system. One advantage is, for example, that you do not need an external pilot source. Instead you can use the pressure from the load to open the valve.

Monitored and safety classified logic elements

We also offer logic elements that are monitored. With these you get feedback in the form of an electrical signal that indicates whether the valve is in the open or closed position. The monitored logic elements are often used when personal safety is important or if they are specifically recommended in machine or safety standards. Monitored logic elements are common in industries such as steel mills and paper mills where you have designated work areas for safety reasons. The monitored logic elements can, for example, confirm that functions are fully switched off during service or in emergency shutdown systems.

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Logic element
Pilot-to-close, spring biased closed with metering notches, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
Modell
Logic element
Normally open, modulating
Manufacturer: Sun Hydraulics
Logic element
LPBC
LPDC
LPFC
LPFCL
LPHC
LPJC
Modell
Logic element
Normally closed, pilot source from port 1, modulating
Manufacturer: Sun Hydraulics
Logic element
LRJA
LRBA
LRDA
LRFA
LRHA
Modell
Logic element
Normally closed with shuttle, modulating
Manufacturer: Sun Hydraulics
Logic element
LRDS
Modell
Logic element
Normally closed, modulating
Manufacturer: Sun Hydraulics
Logic element
LRBC
LRDC
LRFC
LRHC
LRJC
Modell
Logic element
Normally open, pilot source from port 1, modulating
Manufacturer: Sun Hydraulics
Logic element
LPBA
LPDA
LPFA
LPHA
LPJA
Modell
Logic element
Normally open with shuttle, modulating
Manufacturer: Sun Hydraulics
Logic element
LPDS
Modell
Logic element
Bi-directional, modulating
Manufacturer: Sun Hydraulics
Logic element
LHDT
LHFT
LHHT
Modell
Logic element(
Normally closed, direct operated, balanced poppet
Manufacturer: Sun Hydraulics
Logic element(
DKDS
DKFS
DKHS
DKJS
Modell
Logic element
Normally closed, vent to operate, balanced poppet
Manufacturer: Sun Hydraulics
Logic element
DKDR
DKFR
DKHR
DKJR
Modell
Logic element
Normally closed, vent to operate, with integral pilot control cavity, balanced poppet
Manufacturer: Sun Hydraulics
Logic element
DKDR8
DKFR8
DKHR8
DKJR8
Modell
Logic element
Normally closed, pressure adjustable, balanced poppet
Manufacturer: Sun Hydraulics
Logic element
DKDP
DKFP
DKHP
DKJP
Modell
Logic element
Normally open, directly operated, balanced poppet
Manufacturer: Sun Hydraulics
Logic element
DODS
DOFS
DOHS
DOJS
Modell
Logic element
Normally open, vent to operate, balanced poppet
Manufacturer: Sun Hydraulics
Logic element
DODR
DOFR
DOHR
DOJR
Modell
Logic element
Normally open, vent to operate, with integral pilot control cavity, balanced poppet
Manufacturer: Sun Hydraulics
Logic element
DODR8
DOFR8
DOHR8
DOJR8
Modell
Logic element
Normally open, pressure adjustable, balanced poppet
Manufacturer: Sun Hydraulics
Logic element
DODP
DOFP
DOHP
DOJP
Modell
Logic element
3 ports, normally closed, direct operated, balanced poppet
Manufacturer: Sun Hydraulics
Logic element
DKDC
DKFC
DKHC
DKJC
Modell
Logic element(1)
Poppet, control 1 to 2 with integral T-8A pilot control, 2-way
Manufacturer: Sun Hydraulics
Logic element(1)
DFCA-8(10)
DFDA-8(10)
DFEA-8(10)
DFFA-8(10)
Modell
Logic element
3 ports, normally closed, vent to operate, balanced poppet
Manufacturer: Sun Hydraulics
Logic element
DKDD
DKFD
DKHD
DKJD
Modell
Logic element(2)
Poppet, control 2 to 1 with integral pilot control cavity, 2-way
Manufacturer: Sun Hydraulics
Logic element(2)
DFCB-8(10)
DFDB-8(10)
DFEB-8(10)
Modell
Logic element
3 ports, normally open, direct operated, balanced poppet
Manufacturer: Sun Hydraulics
Logic element
DODC
DOFC
DOHC
DOJC
Modell
Logic element
3 ports, normally open, vent to operate, balanced poppet
Manufacturer: Sun Hydraulics
Logic element
DODD
DOFD
DOHD
DOJD
Modell
Logic element
Pilot-to-close, spring biased closed, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LODC
LOFC
LOHC
LOJC
LOKC
Modell
Logic element
Vent-to-open, spring biased closed, with pilot source from port 1 and integral pilot control cavity, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LODA8
LOFA8
LOHA8
LOJA8
LOKA8
Modell
Logic element
Vent-to-open, spring biased closed, with pilot source from port 1, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LODA
LOFA
LOHA
LOJA
LOKA
Modell
Logic element
Vent-to-open, spring biased closed, with pilot source from port 2, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LODB
LOFB
LOHB
LOJB
LOKB
Modell
Logic element
Vent-to-open, spring biased closed, with pilot source from port 1 or 2, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LODD
LOFD
LOHD
LOJD
LOKD
Modell
Logic element
Vent-to-open, spring biased closed, with pilot source from port 2 and integral pilot control cavity, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LODB8
LOFB8
LOHB8
LOJB8
LOKB8
Modell
Logic element
Vent-to-open, spring biased closed, with pilot source from port 1 or 2 and integral pilot control cavity, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LODD8
LOFD8
LOHD8
LOJD8
LOKD8
Modell
Logic element
Pilot-to-close, spring biased open, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LODO
LOFO
LOHO
LOJO
LOKO
Modell
Logic element
Pilot-to-open, spring biased closed, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LKDC
LKFC
LKHC(10)
LKJC(10)
Modell
Logic element
Pilot-to-open, spring biased closed with position indicating switch, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LKFC-Z
LKHC-Z
LKJC-Z
Modell
Logic element
Pilot-to-close, spring biased closed with position indicating switch, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LOFC-Z
LOHC-Z
LOJC-Z
LOKC-Z
Modell
Logic element
Pilot-to-close, spring biased closed with metering notches and position indicating switch, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LOEC-Z
LOGC-Z
Modell
Logic element
Pilot-to-close, spring biased open with position indicating switch, unbalanced poppet
Manufacturer: Sun Hydraulics
Logic element
LOFO-Z
LOHO-Z
LOJO-Z
LOKO-Z
Modell
Logic element(3)
Bypass/Restrictive, modulating
Manufacturer: Sun Hydraulics
Logic element(3)
LHDA(10)
LHFA(10)
LHHA(10)
LHJA(10)