Comatrol (Danfoss)

Check valves allow free flow in one direction and block flow in the opposite direction, Comatrol product range consists of Standard Check Valves, Reverse Flow Check Valves, Slip-In Check Valves, Inline Check Valves.

Functions :

• Low pressure relief valve
• Bypass for filter elements
• Logic for load-sensing circuits
• Anti-cavitation
• Load holding

Product Series :
CV**, CP***, 3C**, 3CM**, RS**, 2RN**

Shuttle valves are of two types, load shuttle valves and hot oil shuttle valves.

Type : Load Shuttle Valve
Functions :

• Logic for load sensing circuits
• Bi-directional motor brake release

Type : Hot Oil Shuttle Valve
Functions :

• Diverting fluid from the low pressure side of a closed-circuit hydrostatic loop for cooling and/or filtering.

Product Series :
CP***, SV**, VS**

Pressure Relief valves are used as safety devices to protect hydraulic systems and components. Comatrol product range consists of Direct-acting Poppet, Differential area Poppet, Bi-directional Poppet and Pilot-operated Spool types.

Advantages :

• Fast response
• Contamination tolerant
• Low leakage
• Low cost

Product Series :
CP***, RV**, VEN**, VME**, VA*

Pressure reducing valves are pressure limiting devices that limit pressure in one portion of a circuit while leaving system pressure unaffected.

Type : Direct-acting Pressure Reducing Valve
Advantages :

• Fast response
• Economical

Type : Pilot-operated Pressure Reducing/relieving valve
Advantages :

• Smooth, stable response
• High pressure capability
• Precise pressure control with varying flow rates

Product Series :
CP***, PRC**, PRR**, PPRC**, PRMP**, PRR**

Sequence valves usually use a pressure signal to shift a spool, thereby opening or closing a flow path at a pre-set pressure.
Unloading valves are typically used to unload a pump outlet to tank at a minimum pressure drop, resulting in higher system efficiencies with less heat generation.

Sequence Valves :
Functions :

• Providing a sequenced series of operations such as in a clamp and lift circuit.
• Use as a relief valve where the return line has high or varying backpressure.

Unloading Valves :
Functions :

• Pump unloading in an accumulator charging system
• Pump unloading in a 2 pump highlow circuit
• Providing a sequenced series of operations such as in a clamp and lift circuit

Product Series :
CP***, VDP**, VDB**, AUV**

Pressure compensated flow control valves are used to limit or regulate flow. Comatrol product range consists of restrictive-type, priority-type, and divider/combiner type.
Combination valves in manifolds for additional features such as fully adjustable flow or free reverse flow are also available.

Type : Restrictive – pressure compensated
Functions :

• Meter-in or meter-out applications to control actuator speeds.

Type : Priority – pressure compensated
Functions :

• Used in meter-in applications, directs fixed flow rate to a priority function, such as steering, while secondary flow is available to other intermittent functions.

Type : Flow Divider/Combiner
Functions :

• Combining flow (forward) or dividing flow (reverse) to hydraulic wheel motors for vehicle drive application ( Consult Slimline for further details )
• Synchronizing motion of hydraulic cylinders ( Consult Slimline for further details )

Product Series :
CP***, VR**, VRF**, VRC**, HFCV**, FCH**, SC**, BC**, VDF**, 2F**

Pilot-operated ( pilot-to-open ) check valves will positively hold a pressurized load and will release the load upon applying pressure signal to the pilot port.

Functions :

• Pilot-operated check valve will prevent leakage and lock the cylinder in position

Product Series :
RPC**, CP***, MC**, RPV**

Counterbalance valves will positively hold a pressurized load and will control the motion of the load based on application of a pressure signal to the pilot port.

Functions :

• Leak-free load holding
• Protection against hydraulic line failure
• Protection against pressure shocks caused by external forces or overrunning loads
• Smooth, modulated motion control when the directional valve is suddenly closed

Product Series :
CP***, CB**, VCB**, DCB**

Directional valves are either manually or hydraulically actuated spools.

Functions :

• Directional control valves for high flow with pilot pressure controlled by solenoid valves.
• Bypass valves for flow dividers in vehicle traction circuits.

Product Series :
CP***, CE**, DMP**, DV**

Logic Elements are multi-purpose devices. These valves, when used with other cartridge valves, can create a wide variety of circuits for control of pressure, flow, and direction.

Functions :

• Load-sensing for a fixed displacement pump with single or multiple actuators.
• Bypass-type pressure-compensated flow control.
• Pump unloading.
• Selector circuit.

Product Series :
VLP**, HLEA**, HLE**, LE**, PC**

Solenoid valves are electrically-operated, on-off poppet or spool-type valves.

Functions :

• Load holding
• Blocking
• Directional control applications

Product Series :
SV**, SVP**, HSV**, HSVP**, CP***