Pilot Operated Sequence Valve – Series R4S

Parker subplate mounted sequence valves series R4S are exceptional – both in function and design – even under high flow conditions. Pacemaking in design, these valves offer improved features.

The pilot operated R4S valves enable a hydraulic system to operate in a pressure sequence. The design combines a poppet type seat valve with the pilot control. When the system pressure reaches the setting pressure, the valve opens and permits flow to the secondary subsystem. The pilot control reduces the pressure loss from primary to secondary area to a minimum.

Markets:
• Industrial

Features/Benefits:
• High performance – maximum adjustable pressure of 350 bars and a flow capacity ranging from 150 l/min to 650 l/min
• Sophisticated pilot stage design reduces pressure overtravel and cracking flow to a minimum – thus reducing heating, power and production losses at high pressure operation
• Precise adjustment and quick response – eliminate pressure variation and system shocks
• Three spring settings – for sensitive control
• Short delivery time – no warehousing necessary
• 3 pressure stages
• 3 adjustment modes:
  – hand knob
  – acorn nut with lead seal
  – cylinder lock

Applications:
• Suitable for general hydraulic applications