cotton picker hydraulic control valve

Introduction of GKV80

Being the one of most trustworthy organization and guided by knowledgeable professionals, we are actively committed towards offering a broad assortment Sectional Valves to our clients. This range of Sectional Valve is fabricated by employing finest quality basic materials by experienced professionals keeping in mind industry defined norms and standards. Along with this, the offered range of valves is available in various customized options, shapes and sizes to meet the specific requirements of clients. We market a wide assortment of sectional valves manufactured by GRH perfectly suitable for mobile and industrial applications. These are available in various flow capacities. These valves come with a range of spool options with adjusted relief valves and its levers.

GKV 80 series sectional valves provide the following fuctions:

       ●  Inlet module with pilot supply

       ●  A /B port with overload valve on main section

       ●  A port with overload valve on work section.

       ●  B port with overload valve on work section.

       ●  A port with dump valve

       ●  B port with dump valve

       ●  A/B port with a mechanical P.O check

       ●  A port with a mechanical P.O check

       ●  B port with a mechanical P.O check

       ●  End section with oil return port.

       ●  End section without oil return port.

       ●  End section with power beyond port.

       ●  Provide other cartridge valve option 

GKV80 Series sectional valve provides the following features:

        ●  Cast iron body (inlet section, main section and end section).

        ●  Spring cap, mechanical detent cap, as well as electoral or hydraulic pilot controlled module body are made by cast aluminum or die cast aluminum.

        ● Parallel circuit, each section have its own load check valve,each section has load option relief option and relief style options.

        ● Can be changed to series circuit.

        ● Provides dump valve options for each center valve.  

        ● Provides different drive modules (Hydraulic remote, manually control, wire driving).

        ● Provides power beyond port.

        ● Can be modified to be a closed center valve.

        ● Provides mechanical detent

        ● Provides options for mechanically actuated P.O check valves to satified with the needs for tractors and mobile cranes

        ● Provides different spool fuction to be used for controlling double acting, single acting cylinders, Hydraulic Motors

        ● Provides floating fuction for spools

        ● Provides excellent flow characteristics small operating force

        ● Can be assembled with 1-8 main sections

       Technical Data

          Rated Flow Rate: 80L/min

          Maximum Flow Rate: 100L/min

          Minimum Flow Rate: 20L/min

          Maximum Pressure at P port: 350bar

          Maximum Pressure at A.B port: 350bar

          Maximum Pressure at T port: 25bar

          Internal Leakage(@70bar)A.B to T: 15-20cc/min

          Internal Leakage(@70bar)A.B to T with P.O check: 2-5cc/min

          Spool Stroke(1.2position): +7/-7mm

          With flooating function(1.2position): +7/-7 -- 10mm

          Solenoid can be either 12 VDC or 24 VDC, corresponding current is 0-1.5 or 0-0,75 Amp

       Basic Operation Principle

GKV series sectional valve is an open centered 3-position 4-way valve. When spool is in its neutral position, the flow from pump passes through the neutral passage to tank, with very low pressure drop. When one of the spool is moved to 1 or 2 position, then neutral passage is blocked. The flow from pump can only pass through parallel passage to load check valve, then, trough the bridge and spool opening to work port A or B.

For multi-section valves, if one of the section spool is in 1 or 2 position, then, there is no flow in its down stream section neutral passage. The main throttle occurs on the valve opening between bridge passage and spool. The operator can control more than one spools, but the magnitude of the flow rate for each controlled section is dependent on the load. 

Application Example

Electro-hydraulic Controlled with Manual Override

3 Sections Stack Valve 

Manual Control Valve(Tractor Hydraulic System)

4 Sections Stack Valve