Monoblock Directional Control Valves
81Pages

Monoblock Valves

COMPANY INTRODUCTION 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 &...

GDV Series Technical LiteratureIntroduction of GRH’s Monoblock Valves GRH Mono-block valves are open center valves. Mainly used in mobile machinery such as, agricultural machinery, construction machinery, mining equipment, material handling equipment as well as maintenance machines. All valve series are adapted to 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. It provides different inlet port and return...

GRH Mono-Block Valves Series Pressure Compensating Variable Elow Control Valves 75

-Block Valves Index GDV25 Series Mono-block Valves

GDV25 Series Technical LiteratureGDV25 Series Mono-block Valve’s Features GDV25 series Mono-block valve provides the following features: • Cast iron body. • Spring cap and mechanical detent cap are made in die cat aluminum. • Parallel circuit. Inlet passage has a load check valve. • Provides manual control and wire pulling control modules. • Provides power beyond options. • Provides mechanical detent. • Provides different spool functions to satisfy with the needs for customers to control double and single cylinders, as well as to control hydraulic motors. • Provide excellent flow...

GDV25 Series Technical Literature

GDV25 series mono-block valve is an open center, 3 position 4 way valve. Flow from pump passes through inlet port and enters to inlet passage. The inlet passage connects two passages: one is through the load check into the parallel passage to supply flow to metering spool; Another is to neutral passage. When spool is in neutral position, spool metering with parallel passage is blocked. The oil from pump has to pass though neutral passage. When all spools are in neutral position, parallel passage for each spool is blocked, and neutral passage is wide open. Therefore, oil from pump is...

GDV25 Series Technical Literature GDV25 Series Valve Dimeansion

GDV25 Series Technical Literature GDV25 Series Valve Dimension

GDV25 Series Technical Literature GDV25 Series Inlet Port Options Option Code: PI (Port on top)

GDV25 Series Technical Literature GDV25 Series Power Beyond Options Power Beyond Option Code: D1 (T port at the top, power beyond port connector at front) Return Port Option Cod: DO (Without Power Beyond)

Spool Function GDV25 Series Technical Literature GDV25 Series Typical Spool Functions Hydraulic Schematics

Drive Style Code Hydraulic Schematics

GDV25 Series Technical Literature GDV25 Series Order Code GDV25 I Spool function Drive code Inlet relief setting (bar) * Inlet port code t Return port code First spool GDV25 Series Order Example GDV25 Inlet relief setting (2 lObar) Power beyond | Spool function Standard manually controlled Inlet port on top Return port on top First spool function Spool function Spool function

-Block Valves Index GDV45 Series Mono-Block Valves Index

GDV45 Series Technical LiteratureGDV45 Series Mono-block Valve’s Features GDV45 series Mono-block valve provides the following features: • Cast iron body • Spring cap and mechanical detent cap are made in die cat aluminum. • Parallel circuit. Inlet passage has a load check valve. • Provides manual control and wire pulling control modules. • Provides power beyond options. • Provides mechanical detent. • Provides different spool functions to satisfy with the needs for customers to control double and single cylinders, as well as to control hydraulic motors. • Provide excellent flow...

GDV45 Series Performance Data

GDV45-1 is an one spool valve. It is also an open center, 3 position 4 way valve. When spool is in neutral, flow from pump passes through neutral passage to tank. Produces very little pressure drop. When spool is moved to“ 1 ”or“ 2 ’’position, the neutral passage is blocked by spool. The flow from pump has to pass though the parallel passage to provide flow to spool’s metering to work port. The spool stroke is 7 mm. For ZD45-1 mono-block valve, it cannot provide power beyond function. GDV45-2 Two spool mono-block valve is also an open center, 3 position 4 way valve. When spools are all in...

GDV45-3 is a three spool mono-block valve. It is also an open center, 3 position 4 way valve. Assuming the three spools were moved as shown in above picture. The first spool is in neutral (“0”position). The spool metering to“ A l”and“ B l”are all blocked. The second spool is moved to“ 2 ’’position, Flow from parallel passage flows through spool opening to “B2”port, flow from “A2” port return passage through spool’s another opening. The third spool is moved to “ 1 ’’position, flow from parallel passage flows to“ A 3”through spool opening. Flow in“B3”port flows to return passage through the...

GDV45 Series Valve Dimension GDV45-2:2 Spool Mono-block Valve

GDV45 Series Valve Dimension GDV45-3:3 Spool Mono-block Valve GDV45-4:4 Spool Mono-block Valve GDV45 Series Technical Literature

GDV45 Series Technical Literature GDV45 Series Inlet Port Options Inlet Option Code: PI (Inlet port at front)

GDV45 Series Mono-block Valve Return Port Options