Proportional Load Sensitive Valve

this electronically valve are widely used for crane with remote controller. For example, the Chinese famous factroy XCMG, this factory manufactory many kinds of cranes with this valve. Valve name Load sensing proportional directional spool valve.
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this electronically valve are widely used for crane with remote controller. For example, the Chinese famous factroy XCMG, this factory manufactory many kinds of cranes with this valve. Valve name Load sensing proportional directional spool valve.

1,General:

HLPSL and HLPSV load-sensing proportional directional spool valves are mainly used in engineering machinery to control hydraulic cylinders or hydraulic motors. It is adaptable to manual; electric; hydraulic and pneumatic actuations to achieve step-less speed regulation, without effect of load change. Load-sensing characteristics can make multiple actuators work at different speed and pressure at the same time and independently till the maximum pump flow is reached.

 

HLPSL valve is designed for constant displacement pump system while HLPSV valve is designed for variable displacement pump system.

Load-sensing proportional directional spool valve is a combined type valve. Generally, it consists of connection Block, Directional Valve and End Plate. If necessary, ancillary blocks can be added on directional valves. Intermediate block could be added between directional valves.

2,technical specifications

 

References		size 2	size 3	size 5
Number of Directional Valve bank		1～12	1～12	1～10
Port access type		thread connection	thread connection	thread connection
Flow code		3,6,10,16,25,40	3,6,10,16,25,40,63,80	16,25,40,63,80,120,160
Max.flow(L/min)		54	100	210
Max.pressure(bar)		420	420	420
Control Method	Pilot circuit pressure(bar)	20～40	20～40	20～40
	Manual force(N)	≥2.3Nm	≥1.3Nm	≥3Nm
Working Pressure(℃)		-40～80	-40～80	-40～80
Weight	Connection Block (kg)	1.7	4	8
	Directional Valve bank (kg)	1.9	4	8
	End Plate (kg)	0.5	1.5	2.5
Fix mode		thread connection M8	thread connection M8	thread connection M10

3, Model code

 

 

（1）Basic code of connection block

HLPSL: constant displacement pump；HLPSV: variable displacement pump；

（2） Port P & R of the connection block: 2-G3/8; 3- G1/2；4- G3/4;5, 55-G1；6- G1 1/4；

（3） Additional component：C, standard type；G，throttle valve (only used for HLPSL)；H，fixed differential overflow valve for improving the circulating pressure (about 14bar, HLPSL)； 

（4）Pilot oil circuit pressure: 0 without pressure reducing valve; 1 with pressure reducing valve (20 bar); 2 with pressure reducing valve (40 bar);

 （5）2/2-way magnetic ball valve for system unloading: C, without magnetic ball valve; F, normally open magnetic ball valve, in case of power supply, the pump is pressurized; in case of power failure, the pump carries out unloading; D: normally closed magnetic ball valve, in case of power supply, the pump carries out unloading; in case of power failure, the pump is pressurized; D．./F. . , with pressure limiting valve, it can serve as secondary pressure (F50) with pressure value indicated;

（6）tool adjustable, pressure limiting valve in the connection block: Pressure limiting valve sets such as 63, 120, 210, 280, 315, 350, 400 bar; /NF: without pressure limiting valve (only for HLPSV);

（7）Product series:-2 series; -3 3series; -5 5series;

（8）Thread size of directional spool valve ports A & B: 2-G3/8;3-G1/2; 4-G3/4; 5–G1; A, ancillary block or intermediate transition block ZPL 5S(V)/H hydraulic control shut-off valve;

(9)Directional valve block inflow controller: 1, without inflow controller; 2, standard inflow controller; 4, 3-way flow controllers for inlet and outlet (applicable to N 3/3-way valve); 5, strengthened inflow controller; 8, pre-selectable;

(10) Function symbol of valve core: L, M, F, H, J, B, R, O, N;

(11) Output flow code of ports A & B: Maximum output flow of ports A & B (generally select 3, 6, 10, 16, 25, 40, 63, 80,120,160,210 (L/min);

(12) Secondary pressure limitation: N, without pressure limiting protection; C, limit the pressure of actuator ports A & B at the same time; A---B---, limit the pressure of actuator ports A & B respectively, unit (bar);

(13) Function ON/OFF and pressure outlet: N without function ON/OFF and pressure outlet; X C type pressure limitation; S/S1 AB type pressure limitation; A electrical ON/OFF on side A; B electrical ON/OFF on side B;

(14) Operation manner: A(1,2), manual operation with long handle (1=without handle, 2=with short handle); E, electric proportional control; EA(1,2), electric proportional control and manual operation (1=without handle, 2=with short handle); D, electric switching value control; DA(1,2), electric switching value control and manual operation (1=without handle, 2=with short handle); M, manual friction positioning with long handle; H, pure hydraulic control (two pilot oil ports are in the same direction with oil ports A and B); F, pure hydraulic control (two pilot oil ports are perpendicular to oil ports A and B and outward respectively);

(15) Ancillary block: /2 Ancillary block port size G3/8; /3 Ancillary block port size G1/2; /4 Ancillary block port size G3/4; /5 Ancillary block port size G1;

(16) End plate: E1, standard end plate, external discharge of pilot oil, connecting oil return control port T externally; E2, similar to E1, external discharge of pilot oil, port Y is attached additionally; E3, external discharge of pilot oil, a 2-position 3-way magnetic ball valve is mounted; in case of power supply, the system pressure rises to the pressure of safety valve; E4, similar to E1, internal discharge of pilot oil, port T can be sealed; E5: similar to E2, internal discharge of pilot oil, port T can be sealed; E6, similar to E3, internal discharge of pilot oil, port T can be sealed;

(17) Control voltage and the length of anti-explosion type cable: G12-12VDC;

G24-24VDC;G24Ex-3m-24VDC;G12Ex-3m-12VDC;G24MA-3m-24VDC;G12MA-3m-12VDC(anti-explosion type, length of guide line: 3m, 5m, 10m, etc.)

4, Valve parts drawing

5, Valves Reference--have been used from client

 

5, Valves view

 

 

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