3 Way/2 Position Pilot Operated Directional Control Valves

Parker’s series of 5-way, 2-position pilot operated directional control valves are ideal for very high flow applications with a wide range of pressure capabilities. These valves can be used as diverter or switching valves controlling functions or subsystems on a wide array of machinery within the agriculture, construction, industrial, and oil & gas markets.

The variety of options and reliable performance allows for these valves to be implemented in power units, priority steering, or general high flow pressure compensation applications, and can even be configured to include a transitional state when shifting the valve to divert the flow path. The high flow capacity coupled with pilot operation and an assortment of spring settings means Parker can ensure optimal functionality by providing the best valve for the application dependent on the pilot pressure available.

Markets:
• Agriculture Machinery
• Construction equipment
• Material Handling Equipment
• Oil & Gas
• Vocational & Municipal Equipment

Features/Benefits:
• High flow capacity
• Used as high flow switching or metering element
• Can be configured with transitional states
• Range of spring settings available
• Sealed pilot option available
• All external parts zinc plated

Applications:
• Balers
• Drills
• High flow pressure compensation
• Mixers
• Power units
• Presses
• Priority steering or braking

Additional Technical Insight:
N5 cartridge valves from Parker provide design flexibility for high pressure and high flow applications because they are actually 5-ported cartridges. Each version has 3 work ports, 1 Main pilot port, and one spring chamber vent that can sometimes be used as a second pilot / sense port. Each cartridge contains a spool that is offset by a spring to allow a non-piloted flow configuration. Once pilot pressure is applied to port 1, the spool shifts against the spring creating a second flow configuration. Multiple spool configurations, transition types, and switching pressures are available to cover a wide range of applications. N5A125 and N5A300 cartridge valves have an open transition which connects all 3 work ports together during the shifting of the spool. Both versions operate in the same manner with the key difference being flow rating. The N5A125 is rated for 42 GPM (160 LPM) and the N5A300 is rated for 105 GPM (400 LPM.) They can be used as normally-open, normally-closed and selector directional control valves and in a wide range of pressure and/or flow control circuits. The 5th port spring chamber can be vented to tank or used as a sensing port for applications that require high flow pressure or flow control. N5B125 and N5B300 have the same respective flow ratings and operate in the same manner as the respective N5A125 and N5A300. The key difference is that N5B cartridges have a closed condition transition. Please contact your Parker Application Engineer for assistance selecting the best transition condition for your application. N5C and N5D are similar in their operation to N5A and N5B cartridges but without the transition conditions and with either all work ports blocked or all work ports open. N5C125 and N5C300 cartridges have spools that are spring offset to a condition where all 3 work ports are open. Once pilot pressure is applied to port 1, all 3 work ports are blocked. N5D125 and N5D300 valves are spring offset to an all ports blocked condition. Once pilot pressure is applied, the spool shifts and all ports are connected together. Flow ratings for both size 125 styles is 42 GPM (160 LPM) and the size 300 styles are rated for 105 GPM (400 LPM.)