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HYDRAULIC COMPONENTS
 
 
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    Flow dividers
    Directional control valves
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» Home » Directional control valves

 
Directional control valves
 
D&D Ricambi Srl: the leader on supply of hydraulic components and systems
hydraulic components for construction, earthmoving, agricultural and industrial machinery
 
 
 

  External gear motors, series APM


The essential components of series APM external gear motors are an aluminium alloy body and two gearwheels supported by plain bearings.

The front flange can be the SAE standard, or the British or German OEM patterns.

Particular attention has been focussed on the design of the shaft seal, which is often affected by back-pressures.



Advantages


High overall efficiency thanks to optimised hydraulic compensation
Optimum quality/price ratio
Customised models can be built for specific applications
Low maintenance requirements, even in heavy-duty operating conditions
Various components and accessories are available for radial/axial loads, integral anti-cavitation valve, etc.
 
 

  Gerotor Motors

Gerotor motors are slow speed / high torque motors.
The power element of this motor is the power unit, comprising rotor, outer ring (stator) and 7 cylinders.

The patented rotor profile prevents direct leakage between the pressure chambers, resulting in negligible internal leakage and high volumetric efficiency.



Advantages


Without drain line
Integrated speed sensor
Integrated valves
Parking brake or wheel hub
 
 

  Internal Gear Unit QXM

The QXM drive unit can be used in open- and closed-loop hydrostatic drives, and can operate both as a pump and as a motor.

The QXM works as a pump to lift the load and it can recover energy when the load is being lowered.

Used as a bi-directional pump / motor (four-quadrant operation), the unit can power the complete motion cycle of a cylinder.



Advantages


Very low noise levels
Negligible pressure pulsations
Long service life
Suitable for special fluids
4-quadrant (fully bi-directional pump / motor) or
2-quadrant operation is possible
Low susceptibility to cavitation
 
 

  Internal-Gear Motor, Series QXM-HS

The QXM-HS (High Speed) internal-gear motor was developed specifically for use at extremely high speeds. Its first-rate efficiency and extremely low noise levels also make a significant contribution to reducing the costs of both energy and anti-noise measures.

Thanks to the special motor flange, adapted for such applications, and the integral ports for auxiliary functions, the motor can be used in many applications without needing any further modification.



Advantages


Particularly suitable for high speeds

Very low hydraulic and mechanical losses

Can carry high external radial loads

Low noise levels

Cost-savings in system design, assembly and maintenance
 
 

  Internal Gear Flow Divider QXT

Series QXT internal flow dividers divide a flow into as many as four portions.

The division ratios are constant and are unaffected by the loads at the actuators.

They can be used, for example, to provide synchronised movement of unequally loaded cylinders. Several hydraulic motors can be driven at the same speed, irrespective of their external loads.


Advantages


High division accuracy
A very wide range of division ratios is available
The inlet flow can be divided into as many as four portions
High efficiency
Long service life
Also suitable for special fluids
 
 
 
 
 
     
         

 

 Directional control valves
  Monoblock valves
  Sectional valves
  Pressure pre-compensated Load-Sensing and Flow Sharing valves
  Diverter valves
  Directional control valves with direct acting solenoid
 
 Pilot and power devices
  Pilot power valves and feeding unit
  Electronic systems
  Handles and accessories
 
 Hydraulic valves
  Parts in body
  SAE cartridge valves
 
 Bucher Hydraulics
  Mobile- & Industrial hydraulics
  Elevator hydraulics
  Hydraulic drives for high voltage switch gear
  Dyna-Lift ®
 
 Applications
  Applications


Agricultural machinery, trucks, construction equipment, cranes, construction machinery and forklift areas are served by Walvoil with more and more dedicated and tested products for each application: monoblock for Front Loader, integrated solutions for compactors, control valves for excavators , distributors with load sensing control for electro telescopic lift trucks interfaced with digital electronics.

 

 

 

 
 
 

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Thanks to the know-how and partnerships with global leaders suppliers of hydraulic components, our organization is able to offer customers the best solutions.

Our technical department is available to suggest the best solutions for every need.
Besides standard products supply, D&D Ricambi Srl provides custom solutions for small quantitatives.
 
SP 231 Km 80,176 - 70026 Modugno (Ba)
Fax +39 080.5352723  e-mail:info@dedricambi.it

 

 

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