sun hydraulics counterbalance valve pdf

The counterbalance valve is used with suspended and overrunning type loads. Maximum pressure capabilities up to 420 bar with flow capacities starting from 15 l / min. Our CB** family of counterbalance valves is the industry standard in load-holding applications. Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved stiffness in the circuit. This 3-ported, externally piloted unit is a 12-size cartridge style, low leakage counterbalance valve with hydraulic vent. 73 KB pdf. Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved stiffness in the circuit. Counterbalance valves are used with cylinders to safely hold suspended loads and deal with over-running loads. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. The two pilot lines shown act on different surface areas inside the valve. £74.07 exc VAT. Direct Flange Mount Relief Valve Packages. Some actuators with running-away (or overrunning) loads will let the load free fall when the directional valve that controls the actuator shifts to lower the load. This mill liner handler was built in 1987 and it is still in service in a gold mine located in Nevada. Flow Control Valves. Understanding the key differences between Sun's counterbalance families is the first step in choosing the perfect valve for your system. Two check valve cracking pressures are available. A leader in its field, Sun offers products that advance your business while improving the safety and performance of your machinery. Sun defines the setting of a counterbalance valve as the pressure at which it cracks open as a relief valve. Counterbalance Valves. Counterbalance valves with pilot assist are meant to control an overrunning load. A three-port, atmospherically vented version (CA**) is available for retrofit into three-port cavities where unexpected back pressure has created a problem. Back. Sun four-port counterbalance valves (CW**) add a drain port (port 4) to allow for a connection downstream of restriction. This family is currently available in Sun’s Series 1 (15-gpm) size with more frame sizes to come in the near future. 61 KB pdf. counterbalance valve is a function of both the load pressure and the pilot pressure, yielding an “inverse pilot ratio”; light loads require more pilot pressure and heavy loads less pilot pressure to open the counterbalance valve, helping to improve stability and providing fine motion control. Hydra Part. The valve setting dynamically self-adjusts in response to load pressure, while still providing a fixed thermal relief setting. £47.87 exc VAT. Cylinders with large platens and tooling or hydraulic motors on winch drives are two examples of such actuators. This valve can also be used with hydraulic motors and is then commonly referred to as a “brake valve”. View Range Here. up to 480 l / min. Operation . Understand the different types of valve that are available, their function and where they are used. Single Counterbalance Valve 1/2" In Line - 100-350Bar. You agree to our use of cookies by closing this message box or continuing to use our site. Double Counterbalance Valve 3/8" In Line - 100-350Bar. This means that you no longer have to compromise between stability (low pilot ratio) and efficiency (high pilot ratio). Two check valve cracking pressures are available. Settings lower than the standard set pressure may result in lower reseat percentages. Pilot ratios range from as low as 1.5:1 up to 10:1. They are available in four-port (MW**) vented versions. Have you ever wondered... ...why Sun has four separate families of counterbalance valves? Maximum pressure capabilities up to 420 bar with flow capacities starting from 15 l / min. Hydra Part. Counterbalance valves play an integral role in the important task of safely controlling an actuator which may be holding a load or a person in the air. Its proven poppet and piston design is suitable for most general applications. SunSource is one of North America's leading fluid power distribution companies, providing products, services and information in hydraulics, pneumatics, filtration, automation systems, and related industrial components, serving both the industrial and mobile equipment markets. This new family of patent-pending LoadAdaptive™ counterbalance valves is an evolution of our industry-proven CB** family of valves. Use the 25 psi (1,7 bar) check unless actuator cavitation is a concern. The flow rate at "crack" is the point where drops turn to a stream, about 1-2 cubic inches per minute. Pilot ratios range from as low as 1.5:1 up to 10:1. Sun Hydraulics is a world leader when it comes to counterbalance valves. Each frame size is available in several pilot ratios and flow gains to meet the operating requirements of a broad range of mobile and industrial hydraulic applications. Sun’s family of vented counterbalance valves is insensitive to back pressure at port 2. Learn how hydraulic counterbalance valves work. The presentation is followed by Q&A with attendees. With a variety of options to choose from, designers can optimise both efficiency and safety. Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved stiffness in the circuit. Page 1 of 2. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. CP441-1 Counterbalance Valve Twitter . The presentation is followed by Q&A with attendees. A three-port, atmospherically vented version (CA**) is available for retrofit into three-port cavities where unexpected back pressure has created a problem. Reverse flow is blocked until pilot pressure is applied at port 3. For further assistance or guidance in selecting the best counterbalance valve for your application, please contact your local distributor.Download a PDF of this article here. Note that our standard counterbalance valves are non-vented. The LoadMatch family offers the best solution for many load-holding applications with the following operating requirements: LoadMatch Products | LoadMatch Article | LoadMatch Video. The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 2. The MB and MW families are useful in challenging applications when: Sun's patented LoadMatch™ family offers M-valve performance with an energy-saving self-setting control. Counterbalance valves. This valve can also be used with hydraulic motors and is then commonly called a brake valve. Single Counterbalance Valve 3/8" In Line - 100-350Bar. Back pressure may adversely affect the operation of a standard non-vented counterbalance as it directly increases the valve setting, opposing pilot pressure. As the industry leader in counterbalance solutions, Sun Hydraulics offers more than 150 … Counterbalance Valves. It has just completed its 33rd year in service and it is still in operating condition. Sun’s 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. Generate PDF LoadHolding Selector. Functionally, it is a counterbalance valve that seats as a poppet valve and modulates as a spool valve, offering the best of both worlds. depend on Sun Hydraulics to make our machines safer and more efficient. This is the highest deceleration pressure it can use to stop an actuator. Hydrostatic Transmission Flushing Circuit, Gauge Port Snubbers / Adaptors / Line Fuses. Standard counterbalance valves feature the following: Two check valve cracking pressures available: 25 psi or 4 psi (1,7 or 0,3 bar), Series 1 and 2 available with fixed-settings (fifth letter “X”: CB**X), Counterbalance Products | Counterbalance Tech Tip. Counterbalance Valves Single Counterbalance Valve 3/8" In Line - 100-350Bar - Ext Pilot. Hydra Part. This webinar video explains Sun's counterbalance families and how to choose. The check valve allows free flow from the directional valve (port 2) to the load (port 1) while a direct-acting, pilot-assisted relief valve controls flow from port 1 to port 2. Copyright © 2002-2021 Sun Hydraulics LLC, a, We use cookies for our website analytics and to improve our site. Use the 25 psi (1,7 bar) check unless actuator cavitation is a concern. Download a PDF about the Sun Counterbalance families. the best valve for your application. Both counterbalance valves and pilot-operated check valves can be used to lock fluid in a cylinder to prevent drifting. Sun four-port counterbalance valves (CW**) add a drain port (port 4) to allow for a connection downstream of restriction. £47.51 exc VAT . Two check valve cracking pressures are available. Catalog HY15-3502/US Counterbalance Valve Series CB101 Parker Hannifin Corporation Hydraulic Cartridge Systems Check Valves Shuttle Valves Load/Motor Controls Flow Controls Pressure Controls Logic Elements Directional Controls Manual Valves Solenoid Valves Proportional Valves Coils & Electronics Bodies & Cavities Technical Data SH CV LM FC PC LE DC MV SV PV CE BC TD … £45.26 exc VAT. 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. Settings lower than the standard set pressure may result in lower reseat percentages. 27 Matching Models. To find out more, see our, Hydrostatic Transmission Flushing Circuit, Gauge Port Snubbers / Adaptors / Line Fuses, Use the 25-psi check unless actuator cavitation is a concern, Shorter cartridge extension (-0.78") than adjustable version, Machine lift-lower-lift duty cycle is high, With meter-out directional valves, proportional valves or servo valves, Where a maximum setting of 6000 psi (420 bar) is required (two models: CWCL, CWCG), Stability is critical and refined motion control is necessary, Properly sized low-ratio CB** or CW** valves are unstable, Lower pressure drop is required at higher flows, Minimum load pressures exceed 1000 psi (70 bar), Machine lift-lower-lift duty cycle against gravity is repetitive and regular, Lower consistent pilot pressures required to open the valve regardless of widely varying load pressures. Use the 25 psi (1,7 bar) check unless actuator cavitation is a concern. You agree to our use of cookies by closing this message box or continuing to use our site. COUNTERBALANCE VALVES Introduction They are modulating valves which allow free flow into the actuator and then block the reverse flow until they feel a pilot pressure inversely proportional to the load in the pilot line. Download a PDF about the Sun Counterbalance families. And like the standard counterbalance valves, these are non-vented valves. Sort By: … They help manage pressure created by impacts and loads to help stabilize loads, avoid equipment damage, and cope with hose failure and more. Sun Hydraulics is a leading designer and manufacturer of high-performance screw-in cartridge valves and manifolds that control force, speed and motion in fluid power systems. The result of these features is refined load control and hydraulic dampening. The valve should be set at least 1.3 times the maximum expected load-induced pressure at port 1. This allows for lower pilot pressures because the pilot pressure required to open the valve is independent of load-induced pressure. Hydra Part. A built-in dampening device smooths the opening of the valve while allowing the valve to close quickly. The control creates a dynamic setting that is lower than the thermal relief setting but is never more than necessary to provide safe, reliable load control.

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