Interchangeable with other popular brands of 20 GPM sectional valves. The Walvoil Hydrocontrol EX38 is a full flow-sharing sectional valve that is suitable for a wide range of applications. Very fine metering for precise control. Their patented design allows for outstanding flow control and compensation precision of simultaneous functions even in the most diverse and challenging of operating conditions. By maintaining on demand pressure and flow, internal leakage is reduced, and the system generates less heat. Ideal applications include: truck mounted cranes, forestry trailers, skip and hook loaders, mini-excavators, tractors and other agricultural machines. Load sensing charging valves send a load sense signal to a load compensated pump creating energy efficient . Mid-inlets, custom inlet manifolds, and transition plates add to flexibility in meeting specific . Monoblock construction with 2 to 4 spools Parallel circuit and open center Adjustable relief valve Various spool options Chrome plated spools Individual load check valves Can be controlled with joystick High pressure carry . Dirt-tolerant and reliable, it features honed and matched hardened steel working parts for a long life. Pressure/Flow Control Unit Model Figure 7. Parker's K220LS mobile valve is characterized by industry leading properties regarding robustness, control precision and energy efficiency.Parker K220LS is a sectional-built, load sensing, directional control valve for mobile machinery. Superior control is achieved with various functions such as anti-saturation. This modularity is demonstrated through the availability of valve banks with up to 10 sections, a number of spool types and actuation options, mid-inlets, custom inlet manifolds and transition plates. an improvement in and method of operating a load sensing system in which a variable displacement, pressure compensated pump delivering hydraulic fluid to a fluid operating device through a. For use with Surplus 0. my account . Comatrol offer flow and pressure capabilities of 4-90 l/min (1-24 US gal/min) and up to 350 bar (5,080 ps), respectively.. LOAD SENSING VALVE PC-SERIES HPV95C For PC200-6 & PC220-6 LS VALVE HPV132C For PC300-6 & PC320-6 LS VALVE. Eaton's new CLS180 load sensing sectional mobile valve is a post compensated valve with a highly versatile design. Closed-center pressure and flow-compensated hydraulic system with load sensing reduces unnecessary engine load and improves fuel efficiency by providing pressure and flow only on demand. 3 Way Valve Pressure Controlled Model The pressure differential is set to 20 bar. 12.2 cu. Activity: Interpret catalogue data to determine valve port, functions/features Hydrocontrol load-sensing flow-sharing valves eliminate any signal bleed off and improve control, efficiency and accuracy. Load Sensing Directional Valves. Pressure Control Valve. Load Sensing Hydraulic System The primary goal while designing a hydraulic system is to use less energy and do more work. A number of different settings and presettings are available in order to control the loader for example, live 3rd function; preset flow control for all hydraulic functions; float . The relief valve pressure difference p so is generally set between 20 and 30 bar, which is set by the fixed differential relief valve in the load sensing multi-way valve. Certain types of Load-sensing (LS) pumps utilize a hydro- mechanical control system designed to regulate the pressure difference, or margin pressure, between the inlet and outlet of a flow control valve. Load - Sensing DPC Valves Load - sensing Valves designed for closed and open circuit. Download : Chrome . Additional option with flow compensation circuit up to 170 lit/min and working pressure up to 315 bar. Walvoil load-sensing and flow-sharing valves provide exceptional control, flexibility and efficiency for mobile applications. This valve is suitable for use with 12 tooth splined steering columns and it can operate at a maximum speed of 2,500PSI and a flow rate of 4.4GPM. Choose the spool type required for your application from the drop down box above. Posted by David Price on Thu, Mar 10, 2011 @ 10:03 AM. Energy savings Minimized meter-out losses reduce fuel consumption. In effect this means that the pump only works as hard as is needed to do the job, which in turn saves energy and creates less waste heat. Steering comes first with our priority valves, for maximum safety on the road and on the job. Applications: Front end loader Manufactured in 2 sections with load sensing circuit Nominal flow rate 80 l/min Max working pressure 250 bar Max return back pressure 10 bar Including check valve for Integrated electrohydraulic controls ensure a . to the Load-Sensing principle Design: Individual manifold mounting valve Valve bank via individual manifold mounting valves Actuation: Manual Electro-hydraulic Pressure p max: 400 bar Q max. Valve banks can have up to 10 sections and several different spool types and actuation options. The spools have various hydraulic configurations: doubleacting, single acting, 4th position floating control and are preset for different flow rates. V20 VALVE ASSEMBLY WITH TWO HYDRAULIC REMOTE SPOOL ACTUA- TORS AND ONE MANUALLY CON- TROLLED SECTION. The DPC pre-pressure compensated series is suitable for applications requiring up to 240 . . While there are many uses for L.S. Load sensing simply means feeling the load or, in other words, the load pressure. Max. There are two types of load-sensing signal systems: static and dynamic. Hydraulic equipment is commonly used in trenchless construction operations. They proportionate the rear brake line pressure according to the rear axle load in order to avoid the rear wheel lock during braking. It is so called because the load-induced pressure downstream of an orifice is sensed and pump flow adjusted to maintain a constant pressure drop (and therefore flow) across the orifice. The time sequences and individual processes that take place after actuating the joystick show the pump can only respond after the valve spool moves and a load signal has been sent to the LS line. The load-compensated product can control up to ten functions at the same time - as long as the required nominal . The model of a load-sensing valve is built using the 3-Way Directional Valve, Hydraulic Double-Acting Valve Actuator, Pressure-Relief Valve, and Fixed Orifice blocks, as shown in the model diagram (Figures 6 and 7). It is also termed this because the load-induced pressure downstream of an orifice is sensed and pump flow is adjusted to maintain a constant pressure drop (and therefore flow) across the orifice. Power Steering Valves,Hydraulic Valves,Hydraulics, 12.2 CU.IN. CV 2000 LS is a post compensated sectional Load Sensing Valve with a wide range of pressure and flow controlling options with a flow capacity up to 130 LPM or 34 GPM and multi. Compensated Load Sensing Proportional Valves. Download : Chrome . The 20 bar [290 psi] spring of the compensator forces the pressure-flow compensator spool towards the left when there is no pressure in the system. When the actual pressure difference is greater than the relief valve pressure difference, the relief valve is opened to maintain the constant pressure difference. This feedback calibrates the hydraulic flow in a continuous process. The unloader senses the pressure at the output of the pump vs. the load-sense signal from the control valve. It is so called because the load-induced pressure downstream of an orifice is sensed and pump flow adjusted to maintain a constant pressure drop (and therefore flow) across the orifice. Improving response means at least a part of the sequential processes must run in parallel. Figure 6. Use with a pressure-flow compensated pump with load sensing. Small shuttle valves in a set of passages and tubes called the signal network make way for this one highest pressure application to communicate to the pump. Load Sensing Valves | Nimco Hydraulic Systems Load Sensing Valves CV 2000 LS CV 2000 LS is a post compensated sectional Load Sensing Valve with a wide range of pressure and flow controlling options with a flow capacity up to 130 LPM or 34 GPM and multi. Think of this as a pressure reducing valve with an excess flow port. The valve can handle a maximum 3000 PSI. V20 VALVE ASSEMBLY, MANUALLY . Proportional directional spool valve type PSLF, PSVF and SLF. Load sense port on outlet section. Mobile Valves Load-Sensing Valves HYDAC Nordhydraulic Load-Sensing Directional Control Valves are available with 1 to 10 sections. This non-load reaction circuit has working port (SAE 8) and load sensing port (SAE 4). priority valves, typically they are used to provide priority flow and/or pressure to certain components or functions depending on need. An association unit is arranged between the hydraulic pump and the hydraulic loads and in a first switched state defines a first hydraulic path between the hydraulic pump and the hydraulic loads and in a second . Full flow or LS signal pressure relief valves and solenoid unloader valve. The load-sensing shuttle valve loads the load pressure of each working valve plate to the pressure compensated bypass relief valve of the inlet valve block. Their feature is to provide to each port a predeterminated flow regardless of pressure variations or simultaneous operations of two or more sections. The load sensing system for the control of a hydraulic actuator consists of a variable-displacement pump, a compensator block, and a load-sensing closed-centre directional control valve. Parker's VP120 series is a sectional, pressure compensated load sensing directional control valve for mobile machines. Back To Top. It was equipped with standard MFC control - a single spool Load Sensing with a built-in relief valve - a classic arrangement that works for most LS systems. It's function is to regulate flow to the valve until the flow requirements as defined by the spool notch opening are met. The APV series comes in four different sizes, APV10, APV16, APV22 and APV32 and covers a flow range between 80 l/min and 1000 l/min. Hydraulic Load sensing brake valves are used in vehicles from a long time in the market. ELS systems adjust supply to demand. Brand new Prince "20" series hydraulic control valve. This significantly increases the efficiency of the hydraulic system and thereby reducing emissions and increasing system lifetime. Known for their solid reliability, durability and high . If the hydraulic pressure needs to be increased or decreased the ELS system ensures that the pressure and flow is adjusted to the actual demand. flow 140 l/min Max. The load-signal gallery in the directional control valve connects the A and B ports of each of the control valve sections through a series of shuttle valves. Cranes, aerial platforms, telescopic booms . A small hydraulic line connects the "LS" port on the load sensing compensator to the "LS" port on the valve that diverts flow to one or more functions. Specifications: The pilot-operated pressure-relief valve in the Load-Sensing Velocity Control block is built of the Poppet Valve and the Hydraulic Double-Acting Valve Actuator blocks. . Many of our open-center valves can be adapted and used as closed-center, constant-pressure, and constant-pressure unloaded valves. New Favorite Shape. Our load-sensing directional valves work with upstream pressure compensators for systems with constant and variable displacement pumps. High-tech series of directional control valves. Parker is your single source for any hydraulic valve requirement. With no transition plate needed between the RM10 and RM15 or the current Rexroth M4-12 portfolio, the valve line . A hydraulic pump with an adjustable delivery volume is used in the LS system. The K220LS load sensing valve allows instant and seamless switching between regenerative mode and double acting mode, as well as between gravity lowering and power down. Eaton priority valves can be used with open center, closed center or load-sensing systems. It further features high pressure range up to 420 bar, low hysteresis and the optional salt . With just a few tweaks to a typical pressure compensator, you get a surprising improvement in efficiency and. However, a main hydraulic system relief valve is incorporated. It is often abbreviated to 'LS system'. Load-sensing describes a type of variable pump control used in open circuits. Closed Center Systems with Load Sensing Valve spool metering is further improved since pump pres- sure is maintained at the slightly higher standby pressure (150 to 250 PSI [10 to 17 bar l) than is required by . Qty: $239.95. Activity: Build up and adjust a load sense hydraulic system on a learning panel. It is a two-spool monoblock valve designed to be used in open center, load sensing or constant pressure hydraulic systems. Load sensing Hydraulic Valve Certificate:ISO9001 Company Address:Guangling Industrial Park Guangsheng Road No.1, Yangzhou, Jiangsu, China. HYDAC load-sensing valve, series LX-6. Model Load-Sensing Velocity Control Subsystem Valve Subsystem Simulation Results from Simscape Logging The plots below show the behavior of the motor. Speci cations LOAD SENSING DANFOSS STEERING VALVE New power steering valve from DANFOSS. Load Sensing Pumps are one of the most interesting subjects in industrial hydraulics. . What's more, it presents a nominal flow rate up to 200 l/min and maximum operating pressure of 420 bar. The load sensing control on the pump receives a pressure signal from the section of the valve bank that is working with the highest load pressure at any given moment. Hydraulic pressure increases between the pump and valve. ECxx-42 or ECxx-43 to create a pressure control. Priority valves are used to provide a hydraulic function in a load sensing system with a priority flow.In principle, they operate like a 3-way flow control valve that always supplies the actuator that has priority with the required flow rate, and passes the remaining flow to other actuators. There oil flow to the steering system and work hydraulics is supplied by just one pump. Understanding hydraulic load sensing control Load sensing is a term used to describe a type of pump control employed in open circuits. Danfoss Steering Valve- Load Sensing Item Number: 9-8958 11 In Stock. Description. The installation space and weight-optimised HYDAC valve LX-6 with a nominal flow rate of 160 l/min at the working port focuses on optimising your precision, fine control and energy efficiency. Closed center load sensing system can be realized in combination with a variable displacement pump. Both valves are based on the load sensing principle. Use in an open center system with a fixed displacement pump, or a closed center system with a pressure compensated pump, offers many of the features of a load-sensing system. A load sense pump has the ability to vary its output flow and the system pressure to just match the demands at the hydraulic actuator. One of the most common uses is to apply them with L.S. Advertisement. A load-sensing valve usually is smaller than the compensator valve and typically mounted directly on top of the compensator. The valve will modulate to maintain the spring value in the priority (CF) leg regardless of flow and/or the downstream pressure and flow in the bypass leg. No data. Load sensing is a term used to describe a type of pump control employed in open circuits. The following description of load sensing circuits is taken from Eaton. Exhibit 1. Top of page. K5V200DPH hydraulic piston pump solenoid valve KDRDE5K-31/30C50-102 for Excavator SK200/230/330-6E; Original Komatsu PC200-7 PC200-8 Hydraulic control valve/distribution valve/multitandem valve for excavator; Hydraulic Parts HITACHI EX200-2 Regulator; Kawasaki KMX32N/B45202 main control valve , hydraulic control valve,distribution valve That makes it an important safety feature on load-sensing hydraulic systems. If there is no valve in the circuit specifically designed to communicate a load sense signal, then connecting the line beyond the valve and near the actuator is acceptable. Some major benefits include: Load holding - When a hydraulic cylinder is required to hold its position for an extended period without drifting, load holding valves are the answer. This control valve is designed to control actuators on construction and industrial vehicles. Detailed Product Description YXL-F250L Priority valves used with BZZ5 load sensing steering units The DYXL,YXL type priority valve is used with BZZ5 type load sensing steering control unit or with TLF1 type coaxial flow mplifying steering unit, to form a load sensing power steering system, providing metered priority flow to the SCU. Prove the energy efficiency of a load sense system. The case is interesting, but highly . Many people don't realize you can use an. The AMCA APV control valve series is a highly modular valve design that is available in sectional and plate body designs. The compensator valve is closer to the pump. In an open hydraulic system with a closed center valve, the oil passes through the body valve and returns to the tank only when a function is used. Parker's VP120 series is a sectional, pressure compensated load sensing directional control valve for mobile machines. Gyeongsangnam-do, Korea PHONE +82-55-310-1300 FAX +82-55-326-2245 EMAIL handok@hydraulic.co.kr. CV 300 Robust high flow monoblock valve ranging from 1 to 6 sections with option of service port valves for each port. l LCS Open Centre valve has the same driving properties as the l LCS Load Sensing valve. A load sensing system is a hydraulic system consisting of a pump that automatically adjusts its pressure and flow rate in order to deliver a constant pressure maintained between the inlet of the . They are available with manual, hydraulically, electro-hydraulically and electronic control unit. I like the PV series - these pumps have proven to be exceptional. Up to ten functions can be controlled independently of each other - as long as the required flow rate does not exceed the max. A Danfoss priority valve will always give your steering system precedence. Accumulator Charging Valves with Load Sensing Single and Dual. consumer: 400 l/min Q pu max: 1000 lpm. KLSV series is valve which consists of several sections. Typical load sensing circuit. Load sensing is a type of hydraulic circuit that is again, of little to no use or interest to us or our needs, but rather is for agricultural / construction / mining equipment and the like that use many hydraulic functions (blades, lifters, implements, etc.) About Us; Contact Us; Sales Counter . We provide a wide selection of open- center and load-sense directional control valves for any construction, off-highway, or on-highway appli- cation. The range includes the DPC Series and DPX series of open- and closed-centre, pre- and post-pressure compensated sectional valves. Post compensated flow sharing Manual, hydraulic pilot, . in. A hydraulic system having a hydraulic pump, having a plurality of hydraulic loads and having a plurality of load-sensing valves for adjusting the pump performance of the hydraulic pump. Flow reduction in a classic load sensing system can be caused by either a) an increase of the restriction between the pump outlet and the place where the LS signal is taken from, or b) a flow present in the LS line, as the pressure drop inside the LS line will add to the delta P in the DCV Fiddlers are nice people. . The maximum operating pressure is reported to the pump's controller by all the crane units through a chain of non-return valves. Add Cart. pressure 350 bar Possible circuit with 3-way pressure compensated valve Load - Sensing DPX Valves Previous: Sauer-Danfoss launches low-flow . The CLS 180 load-sensing sectional valve for mobile equipment applications is a post-compensated valve with a modular design for versatility. The load-sensing valve is factory preset and normally does not need to be adjusted during the initial pump setup. Load Holding Valves in Hydraulic Cylinders Load holding valves provide increased safety and performance in many hydraulic system applications. Overview : Pressure pre-compensated Load-Sensing valve :-. Excess flow, however, is unloaded to tank at a pressure slightly higher than the operating pressure of the valve. pump flow. Two inputs, one output - Comatrol shuttle valves respond to the pressure signal from the highest bidder, imparting hydraulic logic to your load-sensing system. The RM10 and RM15 load sensing valves offer load pressure independent flow control with rates of 23.7 and 39.6 gpm (90 and 150 lpm) respectively, at inlet pressures of 4061 psi (280 bar) and port pressures up to 4641 psi (320 bar). . The point of this post is not the hydraulic function that I just described. Shape. About Surplus Center. The added speed and precision means more work can be done in a given time. Also, less strain is put on hoses and seals . Load sensing hydraulics is a technology that automatically adjusts pressure and flow rate based on the amount of fluid passing through a metered orifice. For explanation of hydraulic symbols click here. A conventional hydraulic system with a fixed-displacement pump provides a constant flow through the system.