Sectional Directional Control Valves
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Sectional Valves

GRH is specialized in providing hydraulic components and solutions for hydraulic systems. With continuous improvement and enthusiasm over the past 30 years, GRH has developed into an emerging power in the fluid power industry since it was established in 1986. Research and development are the driving force that facilitates GRH’s ability to create new products. Standards of TS16949 and IS014000 are our guiding principles. Employees’ capabilities and creativity are major factors that differentiate GRH from our competitors. GRH designs and produces Hydraulic Gear Pumps & Motors, Monoblock...

GRH Sectional Valves are open center valves. Mainly used in mobile machines such as, agricultural machinery, construction machines, mining equipment, material handling equipment as well as maintenance machines. All valve series adapted modular design. The system designer can choose different modules to design a complex system. Main valve spool is designed to satisfy with the customer’s requirements, which provides excellent flow characteristics and very low flow force. With different inlet modules, it can be used in any applications. There are number of different main valve modules to...

GKV80 Series Technical Literature

GKV80 series sectional valves are open center valves. Mainly used in mobile machines such as, agricultural machinery, construction machines, mining equipment, material handling equipment as well as maintenance machines. All valve series adapted modular design. The system designer can choose different modules to design a complex system. Main valve spool is designed to satisfy with the customer’s requirements, which provides excellent flow characteristics and very low flow force. With different inlet modules, it gives user the freedom for choosing different relief valve and different port...

GKV80 Series Technical LiteratureMain Features 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 has its own load check valve. Each section has load relief option and relief style options. • Can be changed to series circuit. • Provides dump valve options for each work port. • Provides different drive modules (electrical, hydraulic remote,...

GKV80 Series Technical LiteratureMajor Technical Data 80 L/min 100 L/min 350 bar 350 bar 25 bar 15-20 CC/min 2-5 CC/min +7/-7mm +11-1 -10mm corresponding current Rated flow rate Maximum flow rate Minimum flow rate 20 L/min Maximum pressure at P port Maximum pressure at A/B port Maximum pressure at T port Internal leakage (at 70 bar) A/B to T Internal leakage (at 70 bar) A/B to T With P.O. check Spool stroke (1/2 position) With floating fimction (1/2 and F position) Solenoid can be either 12 VDC or 24 VDC, is 0 - 1.5 or 0 - 0.75 Amp.

Performance Data Pressure Drop (bar) Pressure Drop (bar) Flow Rate (L/min) -P-A -P-B Flow Rate (L/min) GKV80 Series Technical Literature

GKV80 Series Technical LiteratureOperation Principle ZK 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, the neutral passage is blocked. The flow from pump can only pass though parallel passage to load check valve, then, through the bridge and spool opening to work port “A”or“B”. For multi-section valves, if one of the section’s spool is in “ 1 ”or“ 2 ’’position, then, there is no flow in...

Inlet Section Dimension GKV80 Series Technical Literature

Hydraulic Schematics Main Function Inlet section with pilot supply Inlet section without pilot supply Basic inlet

GKV80 Series Technical Literature Typical Work Section Dimension GKV80 Series Technical Literature

GKV80 Series Technical Literature Typical Work Section Dimension

Hydraulic Schematics Main Function Load relief valves at both at both A and B ports Load relief valve at A port Load relief valve at B port

GKV80 Series Technical Literature Typical Work Section Hydraulic Schematics Hydraulic Schematics Main Function Load relief valves and PO check at both A and B ports Load relief valves at both A and B ports and PO check at B port Load relief valves at both A and B ports and PO check at A port

Typical Work Section Hydraulic Schematics Code Hydraulic Schematics Main Function Load relief valves at both A and B ports and Manually controlled (Section thickness is 50mm) Basic Work Section Manually controlled (Section thickness is 50mm) Load relief valves at both A and B ports and Manually controlled 4th position floating (Section thickness is 50mm)

Hydraulic Schematics Main Function Basic work section Manually controlled . . , , , . . . , • , , Agricultural tractor Applications A dump valve at A port (Section thickness is 50mm) Load relief valves and anti-cavitation valves at both A and B ports Manually controlled Mobile cranes and tractor hitch 4th position floating applications Mechanically operated PO check at B port. (Section thickness 50mm) Load relief valves and anti-cavitation valves at both A and B ports Manually controlled Mobile cranes and tractor hitch 4th position floating applications Mechanically operated PO check at A...

Typical End Section Dimension GKV80 Series Technical Literature

Typical End Section Hydraulic Schematics Hydraulic Schematics Main Function End section without T port End section with T port End section with power beyond port Tractor applications

Drive Style Code Hydraulic Schematics

Drive Style Code GKV80 Series Technical Literature Typical Spool Functions Hydraulic Schematics

Section drawing Without load relief valve Without load relief valve