MOOG D680 Series Proportional Control Valves

MOOG D680 Series Proportional Control Valves

DESCRIPTION

The D633 Series pilot valve consists of a permanent magnet linear force motor, a drive rod connecting motor arm a t u re and the spool guided in a bushing. The linear force motor contains a coil, permanent magnets, pole pieces, an arm a t u reand a centering spring arr a n g e m e n t . The 4-way spool controls fluid flow from the pre s s u report to one of the load ports, and also from the other load port to re t u rn. Deflection of the centering spring due to spool displacement, provides a re t u rn force for the armature.

MOOG SERVO- AND PROPORTIONAL CONTROL VALVES

For over 50 years Moog has manufactured pro p o rtional cont rol valves with integrated electronics. During this time, more than 200,000 valves have been delivered. These servo- and pro p o rtional control valves have been pro v e n to provide reliable control for injection and blow molding equipment, diecasting machines,presses, heavy industry equipment, paper, lumber processing, and other applications

O P E R ATIONAL FEATURES OF THE DIRECT DRIVE PILOT VA LVE

 A direct drive pilot valve re q u i res no pilot leakage flow. This results in considerable energy savings, especially for systems with multiple valves. 

 The dynamics of the direct drive valve is nearly independent of the operating pre s s u re . 

 Reliable operation. The excellent pre s s u re gain of the pilot valve with spool / bushing, provides high spool driving forc e s to the long stroke main spool. This ensures enhanced main spool position control even with high flow forces and contaminated fluids. 

 Excellent dynamics based on a high natural frequency allows high main spool position loop gain, resulting in extre m e l y good static and dynamic response of the main valve.

O P E R ATIONAL FEATURES OF THE COMPLETE VA LV

 Valve body for high rated flow, optional with external pilot supply using X and Y port s . 

 Reduced spool drive area with D683 and D684 Series re s u l t s in the following advantages: - i m p roved dynamic re s p o n s e - reduction in pilot fluid flow for fast movements of the main spool. 

 Failsafe versions available with defined safe spool position using a spring and a 4/2-way solenoid valve for control flow s h o rt circ u i t

 The D680 series pro p o rtional control valves are of two-stage d e s i g n . By combining a fastfirststage, suitable main spool drive are a and integrated electronics, an optimum pro p o rtional valve can be off e re d

Main Features

High dynamic response: Due to the design of pilot stage with high intrinsic frequency, D680 series proportional valves have excellent dynamic response performance, which can quickly respond to system commands and achieve precise control.

High anti-pollution: The valve body is optimally designed with a compact internal structure, which reduces the possibility of pollutants entering and improves the anti-pollution capability of the system.

High rated flow: The series of valves has a high rated flow to meet the needs of high flow hydraulic systems.

Integrated amplifiers and control circuits: The valves have built-in integrated amplifiers and control circuits, providing a high degree of functional flexibility and facilitating user commissioning and maintenance.

A variety of fail-safe solutions: provide different fail-safe solutions to ensure that in the event of a system failure can quickly cut off the hydraulic source, to protect equipment and personnel safety.

Technical specifications

Hydraulic parameters

Rated flow rate: 30 to 1500 l/min (8 to 395 gpm), with a maximum flow rate of up to 3600 l/min (950 gpm) per throttle side at a differential pressure of Δp @ 5 bar (75 lbs).

Maximum working pressure: 350 bar (5000 psi).

Mounting type: ISO 4401 sizes 05, 07, 08 and 10.

Electrical parameters

Supply voltage: 24 volts DC (18 to 32 VDC).

Rated signal options: +/-10 volts, +/-10 mA and 4-20 mA.