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Hydraulic Valves


     Youli Monoblock spool valves now Available to buy on line, follow the link

                      parquiponline.com

Monoblock Spool Valve ( c/w relief valve)



3/8" bsp 40 ltrs per minute

Operating pressure 250 bar maximum

Back pressure on port T 25 bar maximum

Part Number           Size             Flow                  Spool              Price ea

MBSV 01             3/8” bsp     40 Litre per min       Single             

The Above Valve is Ideal for Log Splitters

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3/8" bsp 45 ltrs per minute

Operating pressure Parallel or tandem circuit 315 bar maximum

Operating pressure Series circuit 210 bar maximum

Back pressure on outlet port T 25 bar maximum

Part Number          Size                 Flow            Spools            

MBSV 02             3/8”bsp       45 Litre per min        2                   

MBSV 03             3/8”bsp       45 Litre per min        3                   

MBSV 04             3/8”bsp       45 Litre per min        4                   


1/2" bsp 60ltrs per minute

Part Number           Size                Flow                Spools             Price ea

MBSV 08               ½” bsp         60 Litre per min    Single              


3/4" bsp 90 ltrs per minute

Part Number           Size                  Flow              Spools            

MBSV 12                3/4" bsp       90 Litre per min    Single             


FLOW CONTROL VALVES WITHOUT CHECK


USE AND OPERATION
This valve is used to adjust flow speed of actuators in both directions. As pressure compensation is not provided, flow adjustment depends on pressure and fluid viscosity. High adjustment sensitivity.

Body: Zinc-plated steel
Internal parts: Hardened and ground steel
Seals: Buna N standard
Tightness: Needle type, Minor leakage with closed valve.

Applications: Connect a port to the pressure. Flow will be adjusted in the other one. When used on actuator with double pilot check valve, VRFB has to be mounted between the actuator and the double pilot check valve. Flow adjustment is made by rotating the aluminium hand knob after loosening the side locking screw. This particular configuration allows an accurate and
sensitive adjustment.

Part No                                 Description                         Price ea

HFRC14              1/4" bsp flow control without check      
HFRC383/8" bsp flow control without check
HFRC121/2" bsp flow control without check


FLOW CONTROL VALVES WITH CHECK


USE AND OPERATION
This valve is used to adjust flow speed of actuators in one direction; flow is free in the reverse one. As pressure compensation is not provided, flow adjustment depends on pressure and fluid viscositity. High adjustment sensitivity.

Body: Zinc-plated steel
Internal parts: Hardened and ground steel
Seals: Buna N standard
Tightness: Needle type, Minor leakage with closed valve.

Applications: Connect V to the pressure flow and C to the actuator to set; flow is adjusted from C to V and is free in the reverse direction. When used on actuator with double pilot check valve, VRFU has to be mounted between the actuator and the double pilot check valve. Flow adjustment is made by rotating the aluminium hand knob after loosening the side locking screw. This configuration allows an accurate and sensitive adjustment

Part No                               Description                            Price ea

HFRCV14            1/4" bsp flow control with check           
HFRCV383/8" bsp flow control with check    
HFRCV121/2" bsp flow control with check


Hose Burst Valves



Hose Burst Valves are used to stop a load falling out of control if a hose bursts. Ideally, they should be screwed directly into the ram ports and the hoses attached to them.If this is not possible the valve needs to be fitted in-line as near to the ram as possible.The valve can be used assembled into it’s body or alone as a cartridge valve.

Female / Female

Part No                     Size                 Description                                  

HBVFF14                ¼” BSP        Max flow L/min 25  350 bar max.        

HBVFF38                3/8” BSP      Max flow L/min 50  350 bar max.         

HBVFF12                ½” BSP        Max flow L/min 80   350 bar max        


Male / Female

HBVMF14                ¼” BSP        Max flow L/min 25  350 bar max.         

HBVMF38                3/8” BSP      Max flow L/min 50  350 bar max.         

HBVMF12                ½” BSP        Max flow L/min 80   350 bar max        


In line Check Valve.



One-way valve for in-line use where bi-directional flow can cause system failure.


Part No                   Size                      Description                      

HNRV14                ¼” BSP                Max Pressure 350 bar          

HNRV38                3/8” BSP              Max Pressure 350 bar          

HNRV12                ½” BSP                Max Pressure 350 bar          

HNRV34                ¾” BSP                Max Pressure 350 bar          

HNRV1                   1" BSP                Max Pressure 350 bar         



Double Pilot Operated Check Valve.



Pilot check valves are used to block the cylinder in both directions. Flow is free in one direction

and blocked in the reverse direction until pilot pressure is applied.



Body: zinc-plated steel

Internal parts: Hardened and ground steel

Seals: Buna N standard

Poppet type: No leakage

Applications: connect v1 and v2 to pressure flow and c1 and c2 to the actuator.

PILOT RATIO 1:5,5, MAX FLOW L/MIN 35, MAX PRESSURE BAR 350, CRACKING PRESSURE BAR 3

Part No      Size                     Description                                             

DPCV14      1/4" bsp       Double pilot check valve                                 

DPCV38     3/8" bsp        Double pilot check valve                                 




Double Pilot Check Valve (straight type)




DOUBLE PILOT OPERATED CHECK VALVES - TYPE A USE AND OPERATION
Pilot check valves are used to block the cylinder in both directions.

Flow is free in one direction and blocked in the reverse direction until pilot pressure is applied.

Body: zinc-plated steel
Internal parts: Hardened and ground steel
Seals: Buna N standard
Poppet type: No leakage

Applications: connect v1 and v2 to pressure flow and c1 and c2 to the actuator.


Part No        Size                      Description                                               Price ea

DPCV38S     3/8" bsp  MAX PRESSURE BAR 350   MAX FLOW L/MIN 30     

DPCV12S     1/2" bsp  MAX PRESSURE BAR 350   MAX FLOW L/MIN 55     


Diverter Valve 3 way



USE AND OPERATION
3 way diverter valves are used to divert the flow towards 2 different outlets.

Body: Cast iron
Internal parts: Hardened and ground steel
Seals: Buna N standard
Tightness: Minor leakage.

Applications: Connect P to the pressure flow, A and B to the circuit ports where the flow has to be diverted to. With the lever in position 1, the flow is connected towards port A; with the lever in position 2, the flow is connected towards port B. With the lever in the central position, ports P, A and B are all connected (open centre).


Part No                  Size                  Description                           

DV383                 3/8" bsp      35 ltr/min   250 Bar Max                   

DV123                 1/2" bsp      60 ltr/min   250 Bar Max                    


Diverter Valve 4 way



USE AND OPERATION
This valve is used to reverse oil flow from 2 ways in towards two ways out. It could be used to control a double acting actuator or to reverse the rotation of an hydraulic motor.

Body: Cast iron
Internal parts: Hardened and ground steel
Seals: Buna N standard
Tightness: Low leakage.

Applications: Connect P to the pressure flow, T to the tank and ports A and B to the actuators or motor. With lever in position 1, P is connected to A and at the same time B drains into the tank T; with lever in position 2, P is connected to B and at the same time A drains into tank T. With lever in the central position all ports are closed (closed centre).

Part No                   Size                      Description                        

DV384                    3/8" bsp         35 ltr/min   250Bar Max                 

DV124                    1/2" bsp         60 ltr/min    250 Bar Max               


      

Lever Ball Valve,



Part No                     Size                 Pressure max                

HLBV14                  ¼”bsp                   500 Bar                        

HLBV38                 3/8”bsp                  500 Bar                        

HLBV12                  ½”bsp                   500 Bar                        

HLBV34                   3/4"                      315 Bar                        

HLBV1                      1"                       315 Bar