Counterbalance valve technical information series cb101. Suns floating cartridge construction and cavity design approach allows products to operate precisely and reliably at higher pressures and. To determine your needs, use the following guide for bolt length calculation. Home products product groups goto products goto hydraulics compact hydraulics counterbalance valves integrated cavity. Sun hydraulics investor relations helios technologies. Sun hydraulics investor relations helios technologies counterbalance valve cbca lhn distributors relief pdf valves check cartridge buy online ckclxfn catalog pressure po. Counterbalance valves with pilot assist are meant to control an overrunning load. The sun hydraulics loadmatch counterbalance valves are selfsetting for maximum convenience.
Suns floating cartridge construction and cavity design approach allows products to operate precisely and reliably at higher pressures and flow rates in the most demanding applications. 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. Back pressure may adversely affect the operation of a standard nonvented counterbalance as it directly increases the valve setting, opposing pilot pressure. Bosch rexroth dual counterbalance valve r leader hydraulics. Make offer sun hydraulics aluminum manifold lal 1co1a2. A b c l d directional valve subplate sandwich valve. The counterbalance valve will hold a load in position until pressure or an external force is applied to move the load. An internally piloted counterbalance valve controls cylinder extension smoothly, but reduces thrust during the working portion of the cycle. Catalogue section, inch version pdf files, metric version pdf files. The check valve allows free flow from the directional valve port 2 to the. Hydraulic poppet cartridge valves with position indicating switch, 2 pages, inch and metric.
Atmosphericallyvented counterbalance valves with pilot assist are meant to control an overrunning load. Cbealhn product description counterbalance valves with pilot assist are meant to control an overrunning load. Apr 11, 2016 in this lesson well examine the last remaining member of the pressure control valve family known as a counterbalance valve commonly used to control the descent of a lifted object and negative or. Jun 22, 2019 other names for this valve include counterbalande control valve and over center valve. The check section allows free flow from the directional valve port 2 to the load port 1, while normally blocking flow from port 1 to port 2. In this lesson well examine the last remaining member of the pressure control valve family known as a counterbalance valve commonly used to control the descent of a lifted object and negative or. When the directional control is shifted, the platen will fall unless there is a means for creating an opposing hydraulic force. Turning the adjusting screw clockwise will increase the load carrying capacity of the valve. Counterbalance valves are used in hydraulic systems working with overriding runningaway or suspended load. When there is no pressure applied to the full piston side of a cylinder figure 1. The proven counterbalance valve series zns in size ng06 cetop 03 and ng10 cetop 05 enables a reliable operation by controlling the actuator movement at overrunning loads. Sun hydraulic cartrdige valves sun hydraulics dtdamcn. This 3ported, externally piloted unit is a 12size cartridge style, low leakage counterbalance valve with hydraulic vent. Changes in the valve s internal leakage will also affect its contamination resistance and could therefore result in early valve failure.
Lm7 catalog hy153502us counterbalance valve series mhc010 parker hannifin corporation hydraulic cartridge systems check valves shuttle valves loadmotor controls flow controls. Hydraulic counterbalance valve application hydraulic valve. 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. To overcome the added pressure on the valve port, the part balanced. Operation principle of counterbalance valve counterbalance valve is setup to creates a backpressure to prevent the load running away when the cylinder is retracting. 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. When pressure builds between the closed center directional valve and counterbalance valve, it is applied to the valve port of the counterbalance valve. A utomatically controls setting at reduced loads to minimize energy wasted during machine cycles at less than full load. Other names for this valve include motion control valve and over center valve. Suns products allow machine designers to develop innovative and efficient control systems for all types of capital goods. Cbcalhn standard counterbalance valve, t11a wojanis.
Relief compensated type counterbalance valves or cc type these valve modules have a special configuration of the relief piston that allows the relief opening independently from any back pressure whereas the piloted opening remains subject to additive pressure at port v2. Customer service available mondays to fridays from 9am to 7pm. Operates with lower pilot pressure than typical counterbalance valves. Sun hydraulic cartrdige valves sun hydraulics dtdamcn224. Satisfaction guarantee if you are not satisfied with your purchase, we will refund you click here for more info.
Aug 14, 2019 the control cover allows for variable damping buildup and simplifies adjustment to each application. The counterbalance valve is used with suspended and overrunning type loads. Suns loadadaptive counterbalance valve is designed to provide both stability and energy efficiency in a single valve solution. A guide to suns counterbalance families sun hydraulics. As the industry leader in counterbalance solutions, sun hydraulics offers more than 150 standard. Sun hydraulics 1 hydraulics valves cartridge valves. The symbol shown is a counterbalance valve that is externally piloted from the other cylinder line. With the beam in the up position pump on valve in the natural position wait for a few seconds to see if compression beam begin to drift down if so and it is.
The counterbalance valves spool would then partially close, preventing an uncontrolled drop of the load. The check valve allows free flow from the directional valve port 2 to the load port 1 while a directacting, pilotassisted relief valve controls flow from port 1 to port 2. Cartridge valve and manifold technologies 2012 sun hydraulics corporation higher capacity lower pressure drop for a given flow rate in the same size, or. Can replace existing sun counterbalance applications. Counterbalance and pilottoopen check valves sun hydraulics. 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. As an example, consider a press with a twoton platen fig. This website uses cookies to ensure you get the best experience on our website. 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.
Sun hydraulics products have been setting the standard for the screwin hydraulic cartridge valve industry. Suns loadmatch counterbalance valves incorporate an energysaving selfsetting design. Sun hydraulics pressure control cartridge valves sun nonvented counterbalance valves. Make offer sun hydraulics cbegljn counterbalance valve, new. Learners view an animation of a counterbalance valve in operation and examine the valves internal structure. Make offer sun hydraulics mby counterbalance valve body new sun hydraulics bcd obk8ab valve block, new. Sun counterbalance valves with pilottoopen assist will shut off with very low approaching.
Models 12 npft 34 npft no manual release b81c00 b121c00 b81c0m b121c0m b81cfm b121cfm manual release flush manual release. Pressurizing the line leading to the cylinders capend port also applies pilot pressure to the counterbalance valve. You should have one of your heaviest head assemblies attached to the compression beam before making any adjustments. Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added. Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved stiffness in the circuit. Aug 14, 2014 the sun hydraulics loadmatch counterbalance valves are selfsetting for maximum convenience.
Sun hydraulics designs and manufactures high performance screwin hydraulic cartridge valves and manifolds which are used to control force, speed and motion as integral components in fluid power systems. Sun counterbalance valves with pilottoopen assist will shut off with very low. The counterbalance valve, also called a holding valve, is used to prevent a weight from falling uncontrollably. Standard counterbalance valves help prevent static or dynamic loads from uncontrolled or uninitiated movement. Sun s counterbalance valves hysteresis is typically less than 15%, which means the valve will have reseated to a closed position at 85% of its cracking or opening pressure. With no pressure in the line leading to the cylinders capend port, the counterbalance valve prevents the load from dropping. Wholesale trader of sun hydraulic cartrdige valves sun hydraulics dtdamcn224 valves, sun hydraulics, sun hydraulic valve and pilottoopen check valve offered by al ameen enterprises, kolkata, west bengal. Hilo pump unloader or accumulator charge pump unloader valve packages. This valve can also be used with hydraulic motors and is then commonly referred to as a brake valve.
Settings lower than the standard set pressure may result in lower reseat percentages. Axiom hydraulics is the exclusive supplier of sun hydraulics counterbalance valves to hydraulic applications across southern africa. Load holding cartridges powered by sun quickprint, your ondemand, customized catalogue solution. Sep 09, 2014 suns loadmatch counterbalance valves incorporate an energysaving selfsetting design. These are basically relief valves but used in a particular application to set up a backpressure in a circuit. Learners view an animation of a counterbalance valve in operation and examine the valves. Counterbalance valves reduce the risks of overspeed and cavitation for axial piston motors in open circuits. Features sealed spool type design for improved stability and accuracy as well as low leakage low leakage poppettype check valve for reliable load holding all external parts have yellow zinc dichromate finish. In heavy industry a counterbalance valve will be referred to as a load control valve but not a load lock or load holding valve as they are not zero leak. Troubleshooting the counterbalance valve gpm hydraulic. Sun assembly check valve 20gpm pilot to close t11a part number settype psi port size description list price codaxcnecb aluminum 3000psi 38 npt 90.
Counterbalance valves by terry bartelt stephen schneider. Load control valves counterbalance, vented counterbalance and motion control valve packages for applications up to 350 bar 5000 psi and 190 lmin 50 usgpm eaton vickers screwin cartridge valves vvlovmc001e1 june 2003 h1 h. Sun hydraulics continues its pursuit of the perfect counterbalance valve, introducing our nextgeneration cartridge family that offers an average energy savings of 30% over standard counterbalance valves and offers stability across many applications. Welcome log in your account your cart 0 product products 0 product 0.
Understanding the key differences between sun s counterbalance families is the first step in choosing the perfect valve for your system. This catalog is published by sun hydraulics corporation, 1500 west. These valve assemblies provide relief, counterbalance, and flow control functions for mounting. Sun hydraulics screwin cartridge valves sun hydraulics pressure control cartridge valves sun nonvented counterbalance valves. They are designed to create backpressure at the return line of the actuator to prevent losing control over the load. 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. Internally piloted counterbalance valve with cylinder pressing figure 5 shows the maximum force from different types of counterbalance circuits while acting on a part with the cylinder. These counterbalance valves can be mounted in, at or near hydraulic cylinders and motors to protect against load runaway through hose failure and to improve system stability. Loadmatch counterbalance valves sun hydraulics corporation. The sun three port counterbalance cartridges with pilot to open. Counterbalance valve diagnosis heavy equipment forums. Sun four port counterbalance valves add a drain port port 4 to the cartridge which makes the valve insensitive to back pressure at port 2. Eaton offers 178 mm 7 in or 305 mm 12 in bolt kits one bolt kit for these sandwich valves comprises 4 bolts. The proven cb family of valves leverages a proven poppetandpiston design suitable for most.
Counterbalance valves control motion by guaranteeing the directional valve always sees a positive load pressure, even with overrunning loads. You must select at least 1 quantity for this product. Changes in the valves internal leakage will also affect its contamination resistance and could therefore result in early valve failure. It is always recommended that a counterbalance valve be set before it is installed in an application. Insufficient dampening of counterbalance valves is often the cause for undesired oscillations. The following illustration shows a counterbalance valve schematic. A significant benefit of the sun hydraulics, cartridge system is the ability of the honed spool section to float relative to the cartridges thread. Download a pdf about the sun counterbalance families. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Other names for this valve include counterbalande control valve and over center valve.
1430 910 17 300 637 1054 624 1171 936 1505 1036 271 1256 337 1241 258 770 1083 1592 161 218 38 37 312 975 162 1137 254 197 1229 1076 780 1064 47 734 137 806 1010 622 131 1479 1338 477 794 251 1260