MOOG Servo Valves Pilot Operated Flow Control Valve with Analog Interface 72 Series

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The 72 Series flow control servo valves are throttle valves for 3 and preferably 4-way applications. They are a high performance, 2-stage design that covers the range of rated flows from 95 to 225 l/min (25 to 60 gpm) at 35 bar (500 psi) valve pressure drop per spool land.

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The 72 Series flow control servo valves are throttle valves for 3 and preferably 4-way applications. They are a high performance, 2-stage design that covers the range of rated flows from 95 to 225 l/min (25 to 60 gpm) at 35 bar (500 psi) valve pressure drop per spool land. The output stage is a closed center, four-way sliding spool. The pilot stage is a symmetrical double-nozzle and flapper, driven by a double air gap, dry torque motor. Mechanical feedback of spool position is provided by a cantilever spring.

The valve design is simple and rugged for dependable, long life operation. These valves are suitable for electrohydraulic position, speed, pressure or force control systems with high dynamic response requirements. The 72 Series is ideally suited for applications in the 95 to 225 l/min (25 to 60 gpm) when superior dynamics are a must. Intrinsically safe valve versions are available for use in applications with potentially hazardous environments. Specific models are certified to FM, ATEX, CSA, TIIS and IECEx standards.

Specifications:

  • Valve design: 2-stage, with spool and bushing and dry torque motor
  • Mounting surface: ISO 10372-06-05-0-92
  • Rated flow at µpN 35 bar/spool land (500 psi/spool land): 95 l/min(25 gpm) [1] / 150 l/min(40 gpm)[2] / 225 l/min(60 gpm) [3]
  • Maximum operating pressure to ports P, T, A, B, X: 210 bar (3,000 psi)
  • Pilot Design: Nozzle Flapper
  • Step response time for 0 to 100% stroke: 11 ms[1] / 18 ms[2] / 33 ms[3]

The 72 Series is part of Moog’s family of Mechanical Feedback Servo Valves. This is proven technology that performs reliably in machines where high performance, stability and accuracy are required. Moog’s Mechanical Feedback Valves are designed to provide high reliability and long service life.

Features and benefits:

  • 2-stage design: Enables high machine performance, faster cycle times and greater accuracy - all resulting in higher productivity
  • 100% factory tested to ensure critical specification: Ensures smooth and easy startup, reduces downtime and performance insures long life in critical industrial applications
  • Dual Coil torque motor: Redundancy for high reliability Dual Precision Nozzles in Torque Motor Precision flow control and predictability
  • Dry torque motor design: Eliminates potential contamination issues in the air gaps of the torque motor that could cause machine downtime
  • Hardened 440C Bushing and Spool: Provides for long life, wear resistance when used in the harsh environments; provides for low sliding friction during use
  • Emergency failsafe positioning: Most valves are set up to return to a failsafe position when the command signal is interrupted or eliminated
  • Field replaceable pilot stage filter: Enables preventive maintenance in the field, saving precious machine downtime and service costs
  • External null bias adjustment: Enables technicians to manually adjust the null bias of the valve to adapt to the conditions of the machine. This feature provides a simple adjustment to machine performance without the need to adjust a controller.

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MOOG Servo Valves Pilot Operated Flow Control Valve with Analog Interface 72 Series

MOOG Servo Valves Pilot Operated Flow Control Valve with Analog Interface 72 Series

The 72 Series flow control servo valves are throttle valves for 3 and preferably 4-way applications. They are a high performance, 2-stage design that covers the range of rated flows from 95 to 225 l/min (25 to 60 gpm) at 35 bar (500 psi) valve pressure drop per spool land.