Loadsensitive Proportional Directional Spool Valve with Location Sensor Switch

HLPSL and HLPSV load-sensitive proportional multi-way directional spool valve that integrates pressure, flow, and direction control. They are generally composed of three functional modules: connecting blocks, directional valves, and End plate. In the hydraulic system of engineering machinery equipment, it is used to control the movement direction and speed of hydraulic cylinders, motors, and other actuators. It has the characteristics of compact structure, good energy-saving, and can achieve step-less speed control, as well as multiple executing mechanisms acting in combination under different loads.
HLPSL type valves are used in constant displacement pump systems, while HLPSV type valves are used in variable pump systems. Compared to the two, HLPSV valves generally have a slower response, but their energy-saving effect will be better.

(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.)
 

Jiangsu KM Hydraulic Control System Co., Ltd. was founded in 2009 and is a national high-tech enterprise specializing in the research and development, manufacturing, and sales of high-end hydraulic components under China Baoan Group (stock code: 000009). It is also a national "specialized, refined, and innovative" small giant enterprise.
The company's main product, load sensitive proportional valve, is a core component of hydraulic system control for construction machinery and equipment. It is widely used in emergency rescue, tunnel engineering, mining equipment, and municipal vehicles. It has provided supporting services for many well-known domestic host factories and helped to localize core hydraulic components for high-end mechanical equipment. Adhering to the philosophy of "serving customers with technology, moving customers with attitude, and retaining customers with quality", we provide customers with high-quality products, services, and solutions, and are committed to becoming a globally trusted hydraulic component supplier.