Ets has over 25 years of sales and service experience with the bosch rexroth group in the u. A hurrying ahead of the pulling consumer is avoided. This valve serves as a hydraulic resis tance to the actuating cylinder. They are designed to control the motion of overrunning loads. Hydraulic valve counterbalance valve bosch rexroth oil control. All the valves offered by us are widely applauded by our valuable clients for.
About 58% of these are hydraulic parts, 0% are pneumatic parts. Their most common use is for supporting loads in lifting applications such as cranes, scissor lifts or excavators. These valves are manufactured using high grade raw material in accordance with industry laid norms and guidelines. Pumps 10 industrial hydraulics bosch rexroth ag variable displacement pumps compact units valve technology counterbalance valves optional manual release. Valve world is a leading international rexrpth on valves, control valves, actuators and associated products with a worldwide distribution. Pressure reducing valve, pilot operated rexroth bosch rexroth. Weve got a selection of single and double counter balance valves available for next day delivery when purchased direct from our website, all of which come with bsp female ports as standard, however other port options are available. With their integrated electronics obe they reduce the required wiring and simplify the handling while at the same time providing exact reproducibility and a low. Bosch rexroth logic valves increase flexibility the new bosch rexroth valve series featuring iso standardized cavities carries the principle of modular design over to hydraulics. Rexroth dbds6, dbdh6k, dbds6k pressure relief cartridge valve. This valve module includes 2 sections, each one composed by a check and a relief valve pilot assisted by pressure in the opposite line. The counterbalance valve, also called a holding valve, is used to prevent a weight from falling uncontrollably.
They incorporate two cross piloted check valves which allow free flow toward the a and b outlet ports, and lock in a leakfree mode the flow returning from the actuator, until sufficient pilot pressure is built up in the opposite line and the check valve in opened. Operation principle of counterbalance valve valve products. When load pressure at 1 rises above the pressure setting turn counterclockwise. Describe a counterbalance valve using the 5 main characteristics used to classify pressure control valves. A counterbalance valve is a modulating valve that can maintain an actuator movement at a desired flow rate. Home products product groups focused delivery program goto hydraulics compact hydraulics counterbalance valves common cavity. Insufficient dampening of counterbalance valves is often the cause for undesired oscillations. Some things to consider when applying cartridge valves.
The following illustration shows a counterbalance valve schematic. Hydac counterbalance valves are direct acting poppet valves with integrated check valve which enable a jerkfree movement on the part of consumers in the presence of overcentre loads. Proportional pressure relief valve, direct operated. They are designed to create backpressure at the return line of the actuator to prevent losing control over the load. Home products product groups goto products goto hydraulics compact hydraulics counterbalance valves integrated cavity. Screw adjustment with locknut and protective cap, handknobhandwheel, and lockable handknob. Find 60 and 150 litre per minute dual counterbalance valves from the global bosch rexroth brand at hytec. Goto product focused delivery times are available only for the quantities and if applicable, the preferred options listed for the product. Our knowledge and expertise is invaluable in assisting your company with old and new series bosch rexroth servo and proportional valve repairs, as well as any of the standard directional, flow and pressure control valve repair and replacement needs. Join the grabcad community today to gain access and download. Pilot operated check valves or counterbalance valves.
Thats why we stock a wide variety of different types of hydraulic valve, including inline hydraulic pressure relief valves and other quality pressure reducer valves. To prevent acceleration of hydraulic motors and cylinders at pulling loads. Mechanical and solenoid cartridge valves for interchange in competitor cavities. The leading rexroth dbds6, dbdh6k, dbds6k pressure relief cartridge valve ped 9723ec tested manufacturers and suppliers in china, offers rexroth dbd pressure relief cartridge valve with competitive price here. Counterbalance valves bosch rexroth oil control 2 balancing valves ocgf is the reference in the field of hydraulic components, especially in the range of balancing valves. Dual counterbalance it provides static and dynamic control of load by regulating the flow in and out of the actuator, through ports c1 and c2. Rexroth type 4we10j directional valves leader bearing. More info the check valve allows free flow from the directional valve 2 to the load 1 galve a directacting, pilotassisted relief valve controls flow from port 1 to port 2. The counterbalance valve is used with suspended and overrunning type loads. Operation principle of counterbalance valve counterbalance valve is setup to creates a backpressure to prevent the load running away when the cylinder is retracting. For mounting a counterbalance valve 4 5 38 0 380 valves without valve 0 with flush and boost pressure valve. Counterbalance valves are used in hydraulic systems working with overriding runningaway or suspended load. Aug 25, 2015 counterbalanced valves the counterbalance valve is normally located in the line between a directional control valve and the outlet of a vertical mounted actuating cylinder that supports weight or must be held in position for a period of time.
Further information should be taken from our data sheets dur. When the directional control is shifted, the platen will fall unless there is a means for creating an opposing hydraulic force. Idiots tree felling fails with chainsaw machine tree falls on head and house duration. Counterbalance valves are also known as load control, overcentre, motor overrun valves or hose burst valves. Bosch rexroth oil control poppet design provides enhanced stability at all flows and. Bosch rexroth r counterbalance valve bosch rexroth. Rexroth 4we10 3position j spool cmaflodynehydradyne. Counterbalance, standard poppet type, differential area. They reduce pressure in a branch circuit lower than that of the main circuit. Counterbalance valves with regenerative function bosch rexroth oil control manufactures a variety of valves which combine a counterbalance function with regenerative circuit. Direct operated directional spool valve with solenoid actuation. When load pressure at c2 rises above the pressure setting, the relief function is activated and flow is relieved from c2 to v2.
In case of different body materials, please consult factory. Description when pressure at v2 rises above the spring bias pressure, the check valve poppet is pushed away from the piston and flow is allowed from v2 to c2. This pressure acts on the differential area, and the force generated is counteracted by the bias spring. New spool position sensor available for this valve. A wide variety of rexroth hydraulic solenoid valve options are available to you. Pressure relief pilot operated poppet type and anti. Displacement v g max in cm3 28 55 80 107 160 250 control device 8 55 80. Hyquip supply the entire range of bosch rexroth 2way cartridge valves, for pressure functions type lc. Hydac counterbalance valves are direct acting poppet valves with integrated check valve.
Counterbalance and pilottoopen check cartridges design concepts, features, and applications sun offers a wide variety of load holding and motion control cartridges to satisfy many unique dynamic situations. With hydraulic motors, the pilot pressure needed to open the counterbalance valve can be calculated by the following formula. Calculations the pilot pressure of the counterbalance valves for different applications lower pilot ratios will increase system stability and provide better motion control. Directional spool valves, direct operated, with solenoid. Mechanical, solenoid and proportional cartridge valves for unf cavities.
Main part of ball valves is a drilled ball placed in the center of the valve. They are employed to control cylinders where it is desired to shorten the extension time, without increasing the pump flow capacity. Counterbalance valves wisconline oer this website uses cookies to ensure you get the best experience on our website. Hydraulic counterbalance valve application hydraulic valve. Single counterbalance with brake release port 4b single counterbalance with brake release port they are a combination of a pilot assisted counterbalance valve and of a shuttle for brake control through c3. These are basically relief valves but used in a particular application to set up a backpressure in a circuit. Home products product groups focused delivery program goto hydraulics check valves.
Proper irrigation rexrot perfect results low cost, operation in wide pressure range and perfect modulation even in lower flow rates detail. Pressure relief valve hydraulic pressure reducing valves sgs. Counterbalance valves bosch rexroth oil control 2 ocgf. As the industry leader in counterbalance solutions, sun hydraulics offers more than 150 standard counterbalance models in a range of capacities, pilot ratios and configurations. Proportional, highresponse and servo valves bosch rexroth ag. This valve can also be used with hydraulic motors and is then commonly called a brake valve. Understanding the pilot ratio of the counterbalance valves. Atex 1 technical data type spool valve working pressure range see table. Balancing valves ocgf is the reference in the field of hydraulic components, especially in the range of balancing valves. We hope the addition of this information to our website will help all of our customers with the selection, application, and possible trouble shooting of our load holding cartridges. Counterbalance valves bosch rexroth oil control ocgf. Learners view an animation of a counterbalance valve in operation and examine the valves internal structure. Bosch rexroth pressure relief valves womack machine supply. In this lesson well examine the last remaining member of the pressure control valve family known as a counterbalance valve commonly used to control.
This product takes into account the iso 8643 standard that is to say it holds the load if there is a hose break. Re 07008 general product information hydraulics bosch rexroth ag 532 2 scope of delivery and responsibilities 2. Variable plugin motor with axial tapered piston rotary group. When load pressure at 1 rises above the pressure setting, the direct. Compact insert valves and multifunction cartridge valves. Both counterbalance valves and pilotoperated check valves can be used to lock fluid in a cylinder to prevent drifting. E, edition, bosch rexroth ag directional spool valves, direct operated, with solenoid actuation features 43, 42 or 32 dir ectional design highpo wer solenoid p orting pattern according to iso 44010504005 and nfpa t3. The proven cb family of valves leverages a proven poppetandpiston design suitable for most general applications and provides precise, reliable load holding and motion control at an affordable price. Customer countervalance available mondays to fridays from 9am to 7pm.
Backpressure at port 2 does not affect the valve setting because the spring chamber is atmospherically referenced. Bosch rexroth 2way cartridge valves, pressure functions lc. Order spikes can cause temporary extended lead times. They ensure the load does not drop when the power is turned off.
Poppet type with female threaded sleeve bosch rexroth. Sandwich plate design, 1 10 directional valve elements. Solenoid operated valves pilot operated poppet type 2way. Bosch rexroth oil control hydraulics hydraulic valve counterbalance valve 05420103033500a vbsode1235a counterbalance valve. The counterbalance valve will hold a load in position until pressure or an external force is applied to move the load. Double acting for travel drives and winch drives,size,20,25,nominal pressure,350 bar,5100 psi,nominal pressure up to,350 bar,5100 psi,maximum pressure,420 bar,6100 psi,maximum pressure up,420 bar,6100 psi,direct attachment on rexroth axial piston motors a2fm a2fe a6vm a6ve. Describe the basic operation of a counterbalance valve. View counterbalance and pilottoopen check technical tips. High performance, energy saving and controllability are the main features of walvoils integrated proposals dedicated construction and earth moving machines. Full range of counterbalance valves for sun cavities. Ets uses the latest test stand technology to ensure our customers will receive quality remanufactured bosh rexroth pump and motor units available. Compare the operation of these two hydraulic circuits when the laterally manipulated load is fully supported by some outside force.
We bring forth to our clients a wide range of counterbalance valve. Counterbalance valves common cavity bosch rexroth usa. For more information, refer to bosch rexroth data sheet ra 25 402. They consist of a stackable housing with a control spool, two solenoids and two return springs. Counterbalance, standard guided poppet type common cavity, size 08 when pressure at 2 rises above the spring bias pressure, the check seat is pushed away from the piston and flow is allowed from 2 to 1. Engineering technology services ets specializes in bosch rexroth pump and motor repair services as well as bosch rexroth spare parts such as proportional and servo valve parts. The grabcad library offers millions of free cad designs, cad files, and 3d models. Therefore, the vast majority of counterbalance applications are satisfied with a 3. Counterbalancepilottoopen cartridge valve technical. When load pressure at 1 rises above the pressure setting turn counterclockwise to increase setting.
The sandwich plate design directional valve elements l8580 are compact direct operated pressure compensated proportional solenoid valves which control the start, the stop, the direction and the quantity of the oil flow, with a flow sharing principle. Rexroth pump and motor spare parts repair engineering. Preferred application for safety and control tasks with double acting consumers. Counterbalance valves are used with cylinders to safely hold suspended loads and deal with overrunning loads. Turning the adjusting screw clockwise will increase the load carrying capacity of the valve. The single and doubleacting counterbalance valves limit the return flow of the hydraulic fluid until the rotational speed and the given inlet flow match again. Counterbalance, standard guided poppet type, counterclockwise adjustment sun cavity interchange, t11a when pressure at 2 rises above the spring bias pressure, the check seat is pushed away from the piston and flow is allowed from 2 to 1.
As an example, consider a press with a twoton platen fig. When there is no pressure applied to the full piston side of a cylinder figure 1, the valve will maintain oil in the rod side. Counterbalance valves are also known as overcentre valves or motion control valves. Counterbalance valve technical information series cb101. For this reason, counterbalances are often referred to as motion control valves. Pressure is developed at the work port of the holding valve when the actuator is pressurized.
In this case a load must be controlled while in motion and a counterbalance valve should be used. The mini hydraulic unit provides high pressure at any position of mounting. Bosch rexroth counterbalance valves counterbalance valves are also known as overcentre valves or motion control valves. Single counterbalance, relief compensated bosch rexroth. Pilot operated check valve leakfree for installation in manifolds cartridge valve. Counterbalance, standard poppet type differential area. Catalog hy153502us contents load and motor control valves. Avoidance of a hurrying ahead of the pulling consumer.
Mechanical, solenoid and proportional cartridge valves for unf cavities,full range of counterbalance valves for sun cavities,mechanical and solenoid cartridge valves for interchange in competitor cavities,wide range of 2way, 2position solenoid valves,compact insert valves and multifunction cartridge valves. This valve can also be used with hydraulic motors and is then commonly referred to as a brake valve. Flow is blocked from 1 to 2 until pressure increases to meet the selected valve setting, lifting. Bosch rexroth oil control has developed counterbalance valve modules with a variety of special devices in order to achieve a more controllable and stable pilot function for better load lowering. Bosch rexroth oil control hydraulics hydraulic valve counterbalance valve 05420103033500a vbsode1235a. At sgs, were committed to ensuring that you can find precisely what you need when youre looking for a standard or hydraulic pressure relief valves. Brueninghaus hydromatik rexroth a6vm motor hydraulic variable motor a6vm55, a6vm80, a6vm107, a6vm140, a6vm160, a6vm200, a6vm250 series 6 size nominal pressure. Troubleshooting the counterbalance valve gpm hydraulic. Bosch rexroth oil control manufactures a variety of valves for pressure, flow and motion control of actuators working in both forward and reverse direction. The pressure reducing valves basically comprise of a main valve 1 with main spool insert 3 and pilot control valve 2 with pressure adjustment element. The counterbalance valve is a pressure control device and functions as follows.
682 1360 651 537 565 1656 256 278 948 51 1514 891 1536 1154 648 1129 820 324 1587 186 1645 1095 596 11 685 668 658 988 1133 114 429 276 300 800 1085 1051 957 1102 18 395