The check valve allows free flow from the directional valve 2 to the load 1 while a directacting, pilotassisted relief valve controls flow from port 1 to port 2. 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. An entire amesim simulation model of the considered crane, alike the one presented in. Bulletin hy142004b1us 27 parker hannifin corporation hydraulic valve division elyria, ohio, usa the items described in this document and other documents or descriptions provided by parker hannifin corporation, its subsidiar ies and its authorized. Hydraulic counterbalance valves are often referred to as load holding valves. Incorporates direct acting relief valve for overload protection. Catalog hy153502us contents load and motor control valves. Parker hannifin corporatio hydraulic valve division elyria, ohio, usa cat dd, dd ii catalog hy142500us industrial hydraulic valves failure or improper selection or improper use of the products described herein or related items can cause death, personal injury and. Includes reverse check valve within body, saving space and minimizing installation cost. The counterbalance valves spool would then partially close, preventing an uncontrolled drop of the load.
Parker mhc022 series counterbalance valves are load holding valves with a pilot assist. Bosch rexroth r counterbalance valve bosch rexroth. Catalog hy153101us counterbalance valves technical. Turning the adjusting screw clockwise will increase the load carrying capacity of the valve. Counterbalance valve fluid power engineering engtips. The load will not run away due to the effects of external forces, such as gravity. 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. Counterbalance valves are used in hydraulic systems working with overriding runningaway or suspended load. The data are collected by the realtime system iqanmc2 parker hannifin which uses the canbus communication protocol. 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. 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. Energetic and dynamic impact of counterbalance valves in fluid power machines.
This motion controlling marvel is the successor of the counterbalance valve. Catalog hy142502us manapak sandwich valves introduction. 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. Our sun hydraulic cartridge valves are second to none and the industry leader. The counterbalance is adjusted for the payload after installation. Committed to valve business, vastas is serving the industry with advanced, safe and long lasting. Cartridge counterbalance hydraulic valves cartridge. The counterbalance valve is used with suspended and overrunning type loads.
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. Troubleshooting the counterbalance valve gpm hydraulic. In this white paper, learn how you can configure freely without requiring any custom development, and quickly update configurations as your needs evolve. Operation principle of counterbalance valve counterbalance valve is setup to creates a backpressure to prevent the load running away when the cylinder is retracting. Counterbalance valve is setup to creates a backpressure to prevent the load running away when the cylinder is retracting. A b c l d directional valve subplate sandwich valve. The counterbalance valve is set to open at a pressure slightly above the pressure required to hold the piston up. An internally piloted counterbalance valve controls cylinder extension smoothly, but reduces thrust during the working portion of the cycle. Cross valves feature products with a long dependable service life and optimum versatility due to many standard and optional features.
This unit is a direct acting, screw in cartridge style, poppet type, adjustable, pilot assisted, hydraulic counterbalance valve with free reverse, hydraulic dampening and springchamber connected to tank. The new part number shown is for a valve that replaces the function, but not the form or fit, of the old valve. Apr 27, 2019 bosch rexroth r counterbalance valve bosch rexroth. Manapak sandwich valves technical information series fm.
Uses include controlling overrunning loads in cylinders and motors. Hydraulic cartridge systems dynamic fluid products inc. This means no extra porting or manifold costs are incurred when a. Parkers counterbalance valves are externally vented. Cbggljv 3500 psi please look at pictures to see exact item you are buying. Transfer the locating pin to the hole on the opposite side of the valve body for t port option. Overcenter cartridge with where the machine framework constant counterbalance introduces instability, such as pressure. Options for use in vertical applications an optional pneumatic counterbalance is available. Dynamic machine corporation of winnipeg is a modern industrial manufacturing and repair facility. Products hydraforce hydraulic cartridge valves, custom. Mar 27, 2012 the lifeguard, however, for any hydraulic actuator, is the overcenter valve.
The name counterbalance came from the counterbalancing weights used in the earlier machine tools to prevent the ball screw from coming under heavy load. Mhc010ssnonvented counterbalance adjustable valve port work port pilot port mhc010vsvented counterbalance adjustable work port external vent port. This unit is a counterbalance valve to mount on to a low speed high torque hydraulic motor. Parker s piloted load control valves are designed to operate independent of downstream. This technical tips section is designed to help familiarize you.
Some things to consider when applying cartridge valves. This unit is a line mounting body fitted with 2 screw in cartridge style, direct acting, poppet type, adjustable, pilot assisted, hydraulic counterbalance valves with free reverse, sealed pilot port and springchamber connected to tank. The counterbalance valve will hold a load in position until pressure or an external force is applied to move the load. This has not been tested but we will stand behind this with a two week return policy. The proven counterbalance valve series zns in size ng06 cetop 03 and ng10 cetop 05 enables a. The following illustration shows a counterbalance valve schematic. To determine your needs, use the following guide for bolt length calculation. If you do not change your browser settings, you agree to their use learn more.
So, if the pressure on the tank line is high, or if the pressure setting is critical, then a vented style counterbalance valve would be required. When pressure builds between the closed center directional valve and counterbalance valve, it is applied to the valve port of the counterbalance valve. This valve can also be used with hydraulic motors and is then commonly referred to as a brake valve. Parker directional control valves, open center, models. A counterbalance valve will only open enough to allow the load to move at the desired flow rate, thus preventing the load from overspeeding the pump. Let discovery the system where the counterbalance valve on the rod end of. Cross offers directional control valves, single and double selector valves and inline relief valves. This means no extra porting or manifold costs are incurred when a vented counterbalance is needed. Hydraforce products meet global quality standards including iso 9001, qs 9000 and ce. Counterbalance valves with pilot assist are meant to control an overrunning load. Parker s counterbalance valves are externally vented. Counterbalance valves are used with cylinders to safely hold suspended loads and deal with overrunning loads. A fullyequipped machine shop capable of any sized projects. The lifeguard, however, for any hydraulic actuator, is the overcenter valve.
Vr9034 regenerative valve hydraulic valves cbf hydraulic. Pressurizing the line leading to the cylinders capend port also applies pilot pressure to the counterbalance valve. They are designed to create backpressure at the return line of the actuator to prevent losing control over the load. There are several new additions and product improvements to our check valve product line. B18 parker hannifin corporation hydraulic valve division elyria, ohio, usa b technical information series fm specifications fm2 fm3 fm6 mounting nfpa d03, nfpa d05, nfpa d08, pattern cetop 3, cetop 5, cetop 8, ng 6 ng 10 ng 25 maximum 345 bar 345 bar 345 bar pressure 5000 psi 5000 psi 5000 psi maximum 76 lpm 1 lpm 341 lpm flow 20 gpm. Multiple options are available for pressures as high as 6000 psi 420 bar and flows up to 90 gpm 350 lpm.
Improved accuracy can be achieved with the mapping option. Operation the check valve is a guided poppet design. Parker counterbalance valves are screwin type cartridge valves that control the pressure at an actuator controlling its motion. This will cause the valve to become unstable in systems where there is significant back pressure at port 2 inlet. Counterbalance valve technical information series cb101. Catalog hy14 2502us manapak sandwich valves 2502b1. Counterbalance valve parker hannifin corporation hydraulic cartridge systems check valves shuttle valves loadmotor controls flow controls technical dc. Find out how your company can benefit from plm built on salesforce. Parker offers an extensive line of standard load and motor control valves which are typically referred to as counterbalance valves. Looking for parker counterbalance cartridge valve, 5000 psi, 12. The counterbalance valve operates as a pressure relief valve. These valves work best when used in conjunction with a control valve that vents the valve ports to tank when centered.
Parker valve cartridge load and motor control valves fluid power. They are frequently employed to counterbalance a load as shown. Every cartridge valve, manifold and electrohydraulic control goes through rigorous testing and inspection to perform beyond industry standards. 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. For additional information see technical tips on pages lm1lm4. E2b040z276nmk3 series e2a040, e2b040, e2h040 hydradyne llc. Pilot assisted, designed for motion control applications. Insufficient dampening of counterbalance valves is often the cause for undesired oscillations. Parker hannifin corporatio hydraulic valve division elyria, ohio, usa cat dd, dd ii catalog hy142500us industrial hydraulic valves failure or improper selection or improper use of the products described herein or related items can cause death, personal injury and property damage. The setting pressure is lowered by the pressure in the inlet line. To overcome the added pressure on the valve port, the part balanced.
Cartridge valves technical information cross reference list. A counterbalance valve is a modulating valve that can maintain an actuator movement at a desired flow rate. Eaton offers 178 mm 7 in or 305 mm 12 in bolt kits one bolt kit for these sandwich valves comprises 4 bolts. This is particularly useful in regenerative circuits, meterout circuits, servo valves and proportional valves circuits. Pilot operated check valves or counterbalance valves. Parker directional control valves, open center, models va20.
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. Buy parker e2b040z276nmk3 threaded cartridge style counterbalance valve. This valve can also be used with hydraulic motors and is then commonly called a brake valve. Counterbalance valves are one of the most misunderstood products in the hydraulic. This document and other information from parkerhannifin corporation. We are commited to offering a broad selection of valves and components with worldwide availability and premier customer and technical support. Forward and reverse limit sensors are also standard. Let discovery the system where the counterbalance valve on the rod end of the cylinder with a load retracting the cylinder cap.
These valve assemblies provide relief, counterbalance, and flow control functions for mounting. Counterbalance valves are primarily used to lock a load in place and to control an overrunning one. Origa valves 32way valve, 18 inch catalog 0952 characteristics 1 characteristics to vdi 3290 pressures quoted as gauge pressure characteristics symbol unit description. Energetic and dynamic impact of counterbalance valves in. Our offering includes hydraulic valve products for mobile and industrial applications. Used hydraulice counterbalance valve by sun hydraulics. They can control moving loads, prevent loads from running ahead of the pump, lock loads in any position without drift, and provide static overload relief and thermal expansion. Both counterbalance valves and pilotoperated check valves can be used to lock fluid in a cylinder to prevent drifting.
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