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HY-H20 HY-H10 Y2-H20 Y2-H10 YFB10 Overflow Valve
1. HY-H20 and HY-H10 unloading and overflow valves
1. Product Overview
The HY series unloading and relief valve is superimposed on the Y2 series relief valve and is superimposed with a special check valve. It is suitable for accumulator systems and high and low pressure combination pump systems.
Main functions: Automatic unloading when the charging pressure of the accumulator reaches the set value, and the accumulator supplies oil to the system; in the combination system of high and low pressure pumps, automatic unloading of low-pressure large flow pumps is realized.
2. Technical parameters
Model Nominal diameter (mm) Pressure adjustment range (MPa) Nominal flow (L/min) Rated flow (L/min)
HY-H10 10 2.5～8.0 / 6.3～16 / 8.0～20 / 16～31.5 50 40
HY-H20 20 - 125 100
3. Features
Compact structure: small size, light weight, easy to install.
Stable performance: reliable work and easy maintenance.
Flexible pressure regulation: change the adjustment pressure by rotating the pressure regulating handwheel and replacing the pressure regulating spring to adjust the pressure range.
2. Y2-H20 and Y2-H10 relief valves
1. Product Overview
The Y2 type relief valve adopts a balanced conical valve type (secondary concentric) structure, which has the characteristics of small size, light weight, easy maintenance, and high pressure and low noise.
Main functions: maintain constant hydraulic system pressure, prevent system pressure from being overloaded, and protect the safety of pump and oil circuit systems.
2. Technical parameters
Model Nominal diameter (mm) Nominal pressure (MPa) Pressure regulation range (MPa) Rated flow rate (L/min)
Y2-H10 10 31.5 0.6～8 / 4～16 / 8～20 / 16～31.5 50
Y2-H20 20 31.5 - 100
3. Features
High pressure and low noise: balancing cone valve design to reduce noise.
Flexible installation: Provides threaded connection, plate connection and flange connection.
Easy to maintain: Replacing the adjustment spring can change the pressure adjustment range.
III. YFB10 relief valve
1. Product Overview
The YFB10 type relief valve adopts a balanced piston mechanism, and the pressure is adjusted to a handwheel type, which has the advantages of small size, light weight, easy maintenance, and low noise.
Main functions: Maintain constant hydraulic system pressure and prevent overloading of system pressure.
2. Technical parameters
Model Nominal diameter (mm) Nominal pressure (MPa) Pressure regulation range (MPa) Nominal flow (L/min)
YFB10 10 31.5 0.6～8 / 4～16 / 8～20 / 16～31.5 40
3. Features
Reliable work: balanced piston design to ensure stable pressure.
Flexible installation: supports threaded connection and flange connection, and the valve cover can be installed at any position around 90°.
Easy to operate: The pressure regulating handwheel design is convenient for on-site adjustment.
4. Product comparison and selection suggestions
Characteristics HY type Y2 type YFB type
Structural features unloading and overflow valve, balanced cone valve type balanced piston type
Pressure regulation method rotation pressure regulating handwheel rotation pressure regulating handwheel handwheel
Connection method Plate type connection thread/plate type/flange connection thread/flange connection
Applicable scenario accumulator system, high and low pressure pump combination system general hydraulic system general hydraulic system
Noise level - low
Selection suggestions:
HY type: suitable for accumulator systems or high and low pressure pump combination systems that require automatic unloading function.
Type Y2: Suitable for general hydraulic systems with high requirements for noise and volume.
Type YFB: Suitable for general hydraulic systems that require handwheel pressure regulation and require installation flexibility.
V. Application areas
Construction machinery: hydraulic system for equipment such as excavators, cranes, etc.
Industrial equipment: Pressure control of hydraulic machine tools, injection molding machines and other equipment.
Agricultural machinery: hydraulic transmission system for tractors, harvesters and other equipment.
Mining equipment: hydraulic control of hydraulic support, boring machine and other equipment.
1. HY-H20 and HY-H10 unloading and overflow valves
1. Product Overview
The HY series unloading and relief valve is superimposed on the Y2 series relief valve and is superimposed with a special check valve. It is suitable for accumulator systems and high and low pressure combination pump systems.
Main functions: Automatic unloading when the charging pressure of the accumulator reaches the set value, and the accumulator supplies oil to the system; in the combination system of high and low pressure pumps, automatic unloading of low-pressure large flow pumps is realized.
2. Technical parameters
Model Nominal diameter (mm) Pressure adjustment range (MPa) Nominal flow (L/min) Rated flow (L/min)
HY-H10 10 2.5～8.0 / 6.3～16 / 8.0～20 / 16～31.5 50 40
HY-H20 20 - 125 100
3. Features
Compact structure: small size, light weight, easy to install.
Stable performance: reliable work and easy maintenance.
Flexible pressure regulation: change the adjustment pressure by rotating the pressure regulating handwheel and replacing the pressure regulating spring to adjust the pressure range.
2. Y2-H20 and Y2-H10 relief valves
1. Product Overview
The Y2 type relief valve adopts a balanced conical valve type (secondary concentric) structure, which has the characteristics of small size, light weight, easy maintenance, and high pressure and low noise.
Main functions: maintain constant hydraulic system pressure, prevent system pressure from being overloaded, and protect the safety of pump and oil circuit systems.
2. Technical parameters
Model Nominal diameter (mm) Nominal pressure (MPa) Pressure regulation range (MPa) Rated flow rate (L/min)
Y2-H10 10 31.5 0.6～8 / 4～16 / 8～20 / 16～31.5 50
Y2-H20 20 31.5 - 100
3. Features
High pressure and low noise: balancing cone valve design to reduce noise.
Flexible installation: Provides threaded connection, plate connection and flange connection.
Easy to maintain: Replacing the adjustment spring can change the pressure adjustment range.
III. YFB10 relief valve
1. Product Overview
The YFB10 type relief valve adopts a balanced piston mechanism, and the pressure is adjusted to a handwheel type, which has the advantages of small size, light weight, easy maintenance, and low noise.
Main functions: Maintain constant hydraulic system pressure and prevent overloading of system pressure.
2. Technical parameters
Model Nominal diameter (mm) Nominal pressure (MPa) Pressure regulation range (MPa) Nominal flow (L/min)
YFB10 10 31.5 0.6～8 / 4～16 / 8～20 / 16～31.5 40
3. Features
Reliable work: balanced piston design to ensure stable pressure.
Flexible installation: supports threaded connection and flange connection, and the valve cover can be installed at any position around 90°.
Easy to operate: The pressure regulating handwheel design is convenient for on-site adjustment.
4. Product comparison and selection suggestions
Characteristics HY type Y2 type YFB type
Structural features unloading and overflow valve, balanced cone valve type balanced piston type
Pressure regulation method rotation pressure regulating handwheel rotation pressure regulating handwheel handwheel
Connection method Plate type connection thread/plate type/flange connection thread/flange connection
Applicable scenario accumulator system, high and low pressure pump combination system general hydraulic system general hydraulic system
Noise level - low
Selection suggestions:
HY type: suitable for accumulator systems or high and low pressure pump combination systems that require automatic unloading function.
Type Y2: Suitable for general hydraulic systems with high requirements for noise and volume.
Type YFB: Suitable for general hydraulic systems that require handwheel pressure regulation and require installation flexibility.
V. Application areas
Construction machinery: hydraulic system for equipment such as excavators, cranes, etc.
Industrial equipment: Pressure control of hydraulic machine tools, injection molding machines and other equipment.
Agricultural machinery: hydraulic transmission system for tractors, harvesters and other equipment.
Mining equipment: hydraulic control of hydraulic support, boring machine and other equipment.
