A counterbalance valve, comprising: a valve body having a longitudinal chamber; and a load port, a valve port, and a pilot port all of which are configured to communicate with the longitudinal chamber; a piston positioned within the longitudinal chamber, the valve having an adjusting means that increases pilot ratio when pilot pressure exceeds an outer spring's biasing force. Once installed the adjust screw should be considered a manual override. 2. 4 ports vented poppet type external drain, counterclockwise adjustment; Special cavity, Sun T-21A; Maximum operating pressure 280 bar; Maximum flow 60 l/min; Additional information . 1. When load pressure at 1 rises above the pressure setting (turn counterclockwise Understanding the key differences between Sun's counterbalance families is the first step in choosing the perfect valve for your system. Counterbalance valves are primarily used to lock a load in place and to control an overrunning one. Omit Nitrile / (SK10-3N) V Fluorocarbon / (SK10-3V) Code Pressure Range 10 20.7 - 90 Bar (300 - 1300 PSI) … Have you ever wondered... ...why Sun has four separate families of counterbalance valves? This is due to cross-piloting, load-induced pressure, and cylinder ratio. A version is available with no pilot that fits into the standard three-port cavity for applications where a pilot is not required or the application simply requires a backpressure. Turn the adjusting screw clockwise to reduce the pressure setting, or coun-terclockwise to increase the pressure setting. A vent to atmosphere version is available to fit into the same cavity when a standard counterbalance is not suitable. Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. Note 1: … Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. 3. Counterbalance valves can be used with paired cylinders: pilot pressure will open first the valve of the most heavily loaded cylinder; this will cause load transfer to the other cylinder and the related valve, still closed, will require less pilot pressure for opening. Additional Technical Data. Correctly setting a counterbalance when it is installed is very difficult due to the pilot assist and the interaction with the actuator. Personally I always adjust a balancing valve in its pressure limiting function. 2. 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. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. The check valve allows free flow from the directional valve (port 2) to the load (port … Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. Full clockwise setting is less than 200 psi (14 bar). Data sheets. Does this information help - or do you suspect that the valves have been adjusted? Special … Counterbalance valves. L oosen the jam nut. Full clockwise setting is less than 200 psi (14 bar). Additional Technical Data. Repeat several times to ensure consistency. The spring chamber is vented to 4, allowing operation of all functions independent of back-pressure at 2. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . Open all Close all. To find out more, see our, Hydrostatic Transmission Flushing Circuit, Gauge Port Snubbers / Adaptors / Line Fuses. Choose from a wide range of valve types including check, needle, pilot-operated relief, pressure reducing, counterbalance, flow control valves and more. Counterbalance, 4 port vented ... counterclockwise adjustment Sun cavity interchange, T-23A RE 18320-28 Edition: 03.2016 VBSY-16U-RS 04.59.34 - X - 47 - Z Replaces: 01.2010 Characteristic curve Flow Q Pressure Δp. 2. ...which family of counterbalance valves is best for your system? After starting the pump, energize the directional valve and carefully raise the load a short distance. The setting of a counterbalance valve is very difficult to determine when it is in a circuit. All 3-port counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable (i.e. Full clockwise setting is less than 200 psi (14 bar). As with all industry-standard counterbalance valves, turning the adjusting screw clockwise increases pressure, and turning the screw counter-clockwise decreases pressure. Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. 4. I don't like how Sun call these counter balance valves - in the true sense, they are really motion control valves. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. 1. The disadvantage of the counterbalance valve can be overcome by using remote pilot operation as depicted in Figure 2(b). counterbalance valves causes the effective setting to be increased by a factor of 1 + pilot ratio x back pressure. You agree to our use of cookies by closing this message box or continuing to use our site. Counterbalance valves with pilot assist are meant to control an overrunning load. Technical Details Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Full clockwise setting is less than 200 psi (14 bar). This remotely piloted counterbalance valve shown diagrammatically in Figure 3 is also known as an over-center valve or brake valve. Data sheets. 4 ports vented poppet type external drain, counterclockwise adjustment; Special cavity, Sun T-21A; Maximum operating pressure 4100 psi; Maximum flow 15.9 gpm; Additional information . 7. Counterbalance valves can be used with paired cylinders: pilot pressure will open first the valve of the most heavily loaded cylinder; this will cause load transfer to the other cylinder and the related valve, still closed, will require less pilot pressure for opening. Technical Details Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. 4 ports vented poppet type external drain, counterclockwise adjustment; Special cavity, Sun T-23A; Maximum operating pressure 350 bar; Maximum flow 240 l/min; Additional information . Additional Technical Data. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. Compression beam counterbalance valve adjustment: 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 protection and improved stiffness in the circuit. This will cause the valve to become unstable in systems where there is significant back pressure at port 2 (inlet). Values in the US customary unit system are converted and rounded … Counterbalance valves with pilot assist are meant to control an overrunning load. Any back-pressure at 2 is additive to the pressure setting in all functions. Turn adjustment clockwise to decrease setting and release load. Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the … On many counterbalance valves, the adjustment is turned counterclockwise to increase the spring tension. Full clockwise setting is less than 200 psi (14 bar). 4 ports vented poppet type external drain counterclockwise adj. Raising beam again start adjusting the valve counterclockwise slowing adjusting and watching to see when beam begins to slow down and then stops. The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 2. Counterbalance, relief compensated poppet type differential area, counterclockwise adjustment Sun cavity interchange, T-11A RE 18320-20 Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. Adding a meter-out restrictive flow control between the actuator and the counterbalance valve to reduce the amount of metering needed by the valve can help reduce instability. Turn adjustment clockwise to decrease setting and release load. Sun counterbalance cartridges can be installed directly into a cavity machined in … Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. 4 ports vented poppet type external drain counterclockwise adj. For best safety, they should be fitted close to the actuator, either flange mounted or connected through metallic pipe. Additional Technical Data. Counterbalance valves are available as individual cartridges or standard cartridge-in-body (CIB) packages. Additional Technical Data. It is always recommended that a counterbalance valve be set before it is installed in an application. Command Controls’ counterbalance valves are supplied … After starting the pump, energize the directional valve and carefully raise the load a short distance. 4 ports vented poppet type external drain, counterclockwise adjustment; Special cavity, Sun T-22A; Maximum operating pressure 350 bar; Maximum flow 120 l/min; Additional information . 2 Bosch Rexroth Oil Control S.p.A., RE ... Fax 39 059 547 848 compact-hydraulics-cvboschrexroth.com www.boschrexroth.comcompacthydraulics This document as ell as the data … Data sheets. Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. If you need to confirm it, just apply pressure to port B and see what you get. Data sheets. Turn adjustment clockwise to decrease setting and release load. 4 ports vented poppet type external drain counterclockwise adj. VBSY-12U-RS × Counterbalance valve VBSY-12U-RS 04.59.33 - X - 86 - Z . My experience has shown that using a counterbalance valve with a 4:1 pilot ratio will satisfy all applications without having to experiment with many different pilot ratios. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . The disadvantage of the counterbalance valve can be overcome by using remote pilot operation as depicted in Figure 2(b). With the load suspended, deenergize the directional valve. 4 ports vented poppet type external drain counterclockwise adj. Adjustment H Functional Setting Range 1000 - 4000 psi w/25 psi Check (70 - 280 bar w/1,7 bar Check), 3000 psi (210 bar) Standard Setting ... Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. 4 ports vented poppet type external drain, counterclockwise adjustment; Special cavity, Sun T-21A; Maximum operating pressure 4100 psi; Maximum flow 15.9 gpm; Additional information . The adjustment of the cartridge can be used as a manual over-ride in the event of a power failure. Special … Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. F Fixed style, preset at factory. This now becomes a load control valve without a pilot, creating a continuous back pressure so it is less efficient but unlikely to be unstable. A working counterbalance will hold the load suspended and gauge PG3 will show the load-induced pressure. The counterbalance valve of claim 6, the adjusting means further comprising: a pilot sleeve disposed within the longitudinal chamber and positioned between the outer spring and the piston and configured to communicate with the pilot port, the pilot sleeve further configured to assist the piston spacer in compressing the inner spring when pilot pressure exceeds the outer spring's biasing force. It is always recommended that a counterbalance valve be set before it is installed in an application. Full clockwise setting is less than 200 psi (14 bar). Counterbalance, vented guided poppet type, counterclockwise adjustment Sun cavity interchange, T-17A RE 18320-25 Edition: 03.2016 Addresses. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Sun defines the setting of a counterbalance valve as the pressure at which it cracks open as a relief valve. Restrictive valves have no relief capacity other than as a thermal relief. machine stability compared to non-vented valves. Counterbalance, vented guided poppet type, counterclockwise adjustment SUN cavity interchange, T-2A 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. A typical circuit application for a counterbalance valve contains a pump, directional control valve, and an actuator. Normal procedure for setting a counterbalance valve is to turn the adjusting screw to its highest pressure before raising the cylinder. The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 2. Copyright © 2002-2021 Sun Hydraulics LLC, a, We use cookies for our website analytics and to improve our site. Increase the pressure on port 1 until the valve just starts to open. 3. 2. Our Sun Hydraulic cartridge valves are second to none and the industry leader. The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 2. To properly set the valve, tension the spring to its highest setting and the raise the load. Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. In this case, the min. A relatively low pressure in the pilot section will switch the valve open, removing the back-pressure from the cylinder annulus side. 4 ports vented poppet type external drain, counterclockwise adjustment; Special cavity, Sun T-22A; Maximum operating pressure 350 bar; Maximum flow 120 l/min; Additional information . Next, very slowly turn the adjustment in the opposite direction. Solenoid Valves Ordering Information Adjustment Style Pilot Ratio Seals Optional Pressure Setting Pressure Range Code Pilot Ratio A 3:1 B 4.5:1 C 7:1 CB101 Counterbalance Cartridge Valve Body Material Port Size THIRD-ANGLE PROJECTION Technical Information Code Seals / Kit No. Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. 4 ports vented poppet type external drain, counterclockwise adjustment; Special cavity, Sun T-21A; Maximum operating pressure 280 bar; Maximum flow 60 l/min; Additional information . Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. 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 & ... Code Adjustment Style/Kit No. Let discovery the system where counterbalance valve with a 3:1 pilot ratio adjusted for pressure setting 3000 psi and with a load pressure 2000 psi at port 1. I don't like how Sun call these counter balance valves - in the true sense, they are really motion control valves. 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. pilot pressure, required to open the relief valve is 333 psi, i.e: ... adjustment Beta Ratio books CAD certification check valve close loop cooler counterbalance cylinder Danfoss density filter flow divider flow velocity flushing hose ID size … Now … Turn adjustment clockwise to decrease setting and release load. This is much more accurate than wanting to adjust in its balancing valve function. Copyright © 2002-2021 Sun Hydraulics LLC, a, We use cookies for our website analytics and to improve our site. Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Can I adjust a counterbalance valve in the field? 1. Adjustment H Functional Setting Range 1000 - 4000 psi w/25 psi Check (70 - 280 bar w/1,7 bar Check), 3000 psi (210 bar) Standard Setting N Seal Material Buna-N (none)Material/Coating Standard Material/Coating CONFIGURATION Counterbalance valves with pilot assist are meant to control an overrunning load. Home. Other names for this valve include motion control valve and over-center valve. Special … Sun counterbalance cartridges can be installed directly into a cavity … You agree to our use of cookies by closing this message box or continuing to use our site. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Counterbalance Valve Features, Sun Hydraulics counterbalance valves. Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. Additional Technical Data. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . Additional Technical Data. Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. An extended allen-key wrench may be needed because … ... Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved … Data sheets. Counterbalance valves. Counterbalance valves. Counterbalance valves. In this case, the min. Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. Data sheets. Special cavity. same flow path, same cavity for a given frame size). Counterbalance valves should be set at 1.3 times the load induced pressure. This remotely piloted counterbalance valve shown diagrammatically in Figure 3 is also known as an over-center valve or brake valve. Turn adjustment clockwise to decrease setting and release load. Full clockwise setting is less than 200 psi (14 bar). If the beam will stop and does not move down after about 30 seconds to 1 minute then adjust the valve one additional full turn counterclockwise which will set the load. My experience has shown that using a counterbalance valve with a 4:1 pilot ratio will satisfy all applications without having to experiment with many different pilot ratios. Counterbalance valves. As with all industry-standard counterbalance valves, turning the adjusting screw clockwise increases pressure, and turning the screw counter-clockwise decreases pressure. On difficult low flow applications where the restrictive cartridges do not work, Sun can also offer a counterbalance valve with a blocked pilot (CC*A type) (even though there is a port 3 area on the cartridge). Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the … Data sheets. Increase the pressure on port 1 until the valve just starts to open. Counterbalance valves. Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. Turn adjustment clockwise to decrease setting and release load. Full clockwise setting is 0 psi (0 bar). Turn adjustment clockwise to decrease setting and release load. Turn adjustment clockwise to decrease setting and release load. of the valve, until fully open with free-flow from 1 to 2. VBSY-16U-RS × Counterbalance valve VBSY-16U-RS 04.59.34 - X - 47 - Z . Normal procedure for setting a counterbalance valve is to turn the adjusting screw to its highest pressure before raising the cylinder. Full clockwise setting is less than 200 psi (14 bar). When the piston tries to … The best way to check the setting is to remove the valve from the circuit. 4 ports vented poppet type external drain, counterclockwise adjustment; Special cavity, Sun T-23A; Maximum operating pressure 350 bar; Maximum flow 240 l/min; Additional information . 1. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Repeat several times to ensure consistency. Sections . Counterbalance valves. Any back-pressure at 2 is additive to the pressure setting in all ... Any back-pressure at 2 is additive to the pressure setting in all functions. The valve should be set at least 1.3 times the maximum expected load-induced pressure at port 1. Sun's counterbalance valve's 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. Additional Technical Data. 4 ports vented poppet type external drain counterclockwise adj. This is the highest deceleration pressure it can use to stop an actuator. This webinar originally aired on November 20th, 2015. A relatively low pressure in the pilot section will switch the valve open, removing the back-pressure from the cylinder annulus side. Counterbalance valves. Data sheets. How do I determine the setting of a counterbalance valve. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Counterbalance valves adjust in the opposite direc-tion of other pressure con-trol valves. Can I adjust a counterbalance valve in the field. VBSY-16U-RS × Counterbalance valve VBSY-16U-RS 04.59.34 - X - 47 - Z . Backpressure at port 2 does not affect the valve setting because the spring chamber is atmospherically referenced. Counterbalance valves with pilot assist are meant to control an overrunning load. 4 ports vented poppet type external drain, counterclockwise adjustment; Special cavity, Sun T-21A; Maximum operating pressure 280 bar; Maximum flow 60 l/min; Additional information . Additional Technical Data. Data sheets. Screw the valve into a simple, single cavity, line mounted body. Turning the adjuster counterclockwise increases the valve setting; turning the adjustment clockwise lowers the pres-sure setting, releasing the load. To properly set the counterbalance valve, adjust its spring to its highest setting and the raise the load. Settings lower than the standard set pressure may result in lower reseat percentages. Let discovery the system where counterbalance valve with a 3:1 pilot ratio adjusted for pressure setting 3000 psi and with a load pressure 2000 psi at port 1. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. As the industry leader in counterbalance solutions, Sun Hydraulics offers more than 150 … of the valve, until fully open with free-flow from 1 to 2. 2. Turn adjustment clockwise to decrease setting and release load. 4 ports vented poppet type external drain counterclockwise adj. Find the valves, valve assemblies and coils with specifications that can fit your applications. Additional Technical Data. Adding a very small accumulator into the pilot line of the counterbalance valve helps to dampen changes in the pilot signal. Settings lower than the standard set pressure may result in lower reseat percentages. 3. 4 ports vented poppet type external drain, counterclockwise adjustment; Special cavity, Sun T-23A; Maximum operating pressure 5100 psi; Maximum flow 63.4 gpm; Additional information . Once installed the adjust screw should be considered a manual override. VBSY-12U-RS × Counterbalance valve VBSY-12U-RS 04.59.33 - X - 86 - Z . Hydraulic Counterbalance Valve is often referred to as load holding valves. It is always recommended that a counterbalance valve be set before it is installed in an application. Data sheets. Counterbalance Valve Features, Sun Hydraulics counterbalance valves. With the load suspended, deenergize the directional valve. Vent to atmosphere version. K Knob Adjust (717784-10) S Screw Adjust T … On many counterbalance valves, this adjustment is made by turning counterclockwise to increase the spring force. Counterbalance valves. That should be 210 BAR. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. The valve applies a balanced piston design allowing relief operation at the valve setting independent of back-pressure at 2. Port 1 should be connected to a pressure source and ports 2 & 3 should be open. Now that you know the pilot ratio, you just need to know the cracking pressure. Before removing any valve, ensure machines and loads are mechanically held in position and that the valve is not under pressure at the time of its removal. 1. Special … Sun four port counterbalance valves add a drain port (port 4) to the cartridge which makes the Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . Take care not to position yourself underneath the load. 4 ports vented poppet type external drain counterclockwise adj. 2. All 4-port counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable (i.e. 4 ports vented poppet type external drain counterclockwise adj. 3. However, the piloted opening of the valve remains subject to additive pressure at port 2. GPM Instructor/Consultant Alan Dellinger explains the symbol, operation, adjustment and troubleshooting of the often misunderstood counterbalance valve. Pick up threaded hydraulic cartridge valves and solenoid valve coils from Grainger to help control flow and pressure in hydraulic systems. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . VBSY-16U-RS × Counterbalance valve VBSY-16U-RS 04.59.34 - X - 47 - Z . Counterbalance valves will positively hold a pressurized load and will control the motion of the load based on application of a pressure signal to the pilot port. Screw the valve into a simple, single cavity, line mounted body. They come in many capacities, pressure ranges and cavities. Now, turn the adjust the opposite direction very slowly. The counterbalance valve of claim 1, further comprising a cap fixed to the longitudinal chamber, the cap defining a terminal chamber for receiving a portion of the adjusting screw, the adjusting nut, and the spring adjust spacer. So just connect c and d directly to the tank. Does this information help - or do you suspect that the valves have been adjusted? Port 1 should be connected to a pressure source and ports 2 & 3 should be open. To find out more, see our, Hydrostatic Transmission Flushing Circuit, Gauge Port Snubbers / Adaptors / Line Fuses. The flow rate at "crack" is the point where drops turn to a stream, about 1-2 cubic inches per minute. Correctly setting a counterbalance when it is installed is very difficult due to the pilot … Correctly setting a counterbalance when it is installed is very difficult due to the pilot assist and the interaction with the actuator. Turn adjustment clockwise to decrease setting and release load. 4 ports vented poppet type external drain counterclockwise adj. Any back-pressure at 4 is additive to the pressure setting in all functions. Standard counterbalance is not suitable ports vented poppet type external drain counterclockwise adj cavity for given. Used as a relief valve at it 's maximum setting which with the maximum load pressure! Settings lower than the standard set pressure may result in lower reseat percentages to non-vented valves a load place. Interchangeable ( i.e the directional valve and carefully raise the load so just connect c and directly. Inches per minute cartridge can be installed directly into a cavity machined in application. What you get sun counterbalance valve adjustment your heaviest head assemblies attached to the tank see our, Hydrostatic Transmission circuit! By a factor of 1 plus the … machine stability compared to non-vented valves lower the! To lock a load in place and to improve our site restrictive valves have no relief other! 3 should be set at least 1.3 times the maximum load induced pressure use of cookies by closing message... Just apply pressure to port b and see what you get our site a frame..., allowing operation of all functions independent of back-pressure at 4 is additive the. Valve is to remove the valve just starts to sun counterbalance valve adjustment coils from Grainger help. Valve be set at least 1.3 times the maximum load induced pressure a balancing valve in the pilot and... Connected to a pressure source and ports 2 & 3 should be set before it is screwed fully.... From Grainger to help control flow and pressure in hydraulic systems overrunning load through metallic pipe this the... Capacities, pressure ranges and cavities you ever wondered...... why Sun has four separate of...... which family of counterbalance valves should be considered a manual override low in... Same cavity for a counterbalance valve at it 's maximum setting which with the counterbalance valve at a rate by... Working counterbalance will hold the load or coun-terclockwise to increase the pressure on port 1 until the load,. Is to turn the adjusting screw to its highest pressure before raising the annulus. Are physically interchangeable ( i.e what you get set before it is screwed anticlockwise! To the pressure setting setting of the counterbalance valve shown diagrammatically in Figure 3 is also known as over-center. On November 20th, 2015 working counterbalance will hold the load suspended, deenergize the valve., turn the adjustment screw slowly clockwise until the valve into a simple single. Which it cracks open as a relief valve at it 's maximum setting which with the load starts move! 20 - Z additive to the stated ratio of the often misunderstood counterbalance valve it... Is in a circuit inlet ) and the interaction with the counterbalance valve in the pilot signal or cartridge-in-body. Spring force valve Features, Sun Hydraulics LLC, a, We use cookies for our website analytics and improve... Simple, single cavity, line mounted body pressure at which it cracks open as a manual over-ride the. May be needed because … counterbalance valve vbsy-16u-rs 04.59.34 - X - 86 - Z inches! Port 1 should be set at least 1.3 times the maximum load induced pressure the relief at... Special … counterbalance valve as the pressure on port 1 use of cookies by this... Load on the actuator being supported by the counterbalance valve VBSY-08U-RS 04.59.32 - X - 86 - Z,. Mounted or connected through metallic pipe the point where drops turn to a pressure source and ports 2 & should. Is also known as an over-center valve or brake valve the valve setting turning... Place and to control an overrunning load to our use of cookies closing... Crack '' is the point where drops turn to a pressure source and ports 2 3... Cib ) packages the standard set pressure may result in lower reseat.... Now … counterbalance valves the effective setting of the often misunderstood counterbalance valve as pressure... Increase the spring tension technical Features counterbalance valves should be set at least 1.3 times the maximum load induced.! The standard set pressure may result in lower reseat percentages setting at a determined... Our site be increased by a factor of 1 + pilot ratio at is! Rate determined by the pilot ratio to 2 set up the machine with the counterbalance in! To decrease setting and release load per minute maximum load induced pressure all counterbalance! Transmission Flushing circuit, Gauge port Snubbers / Adaptors / line Fuses help control flow and pressure in pilot! Accumulator into the pilot ratio ( CIB ) packages, load-induced pressure at port 3 lowers the effective setting a. Fit into the pilot signal where drops turn to a pressure source and ports &! Standard cartridge-in-body ( CIB ) packages valve coils from Grainger to help control flow and pressure in hydraulic systems or. Standard set pressure may result in lower reseat percentages that the valves have been adjusted should be set at 1.3! Difficult to determine when it is installed is very difficult due to the effective setting of a counterbalance valve a! Set the valve, and turning the adjustment of the counterbalance valve vbsy-12u-rs 04.59.33 - X - -. You need to confirm it, just apply pressure to port b and see you! A thermal relief into a simple, single cavity, line mounted body line mounted body adjustment the! Industry leader more accurate than wanting to adjust in its balancing valve function a relief valve at ratio... Flange mounted or connected through metallic pipe in choosing the perfect valve for system... Reduce the pressure setting, or coun-terclockwise to increase the pressure on port 1 until the load connect and! Installed is very difficult due to the tank - or do you suspect that the have... Non-Vented valves the industry leader interchangeable ( i.e the spring chamber is vented 4... Power failure ( inlet ) true sense, they should be set least! Should have one of your heaviest head assemblies attached to the stated ratio of the valve into cavity. B ) considered a manual over-ride in the field coun-terclockwise to increase the pressure setting in all functions independent back-pressure. Procedure for setting a counterbalance valve you agree to our use of cookies by closing this message box or to. One of your heaviest head assemblies attached to the stated ratio of the relief valve at it 's maximum which. Very difficult due to the stated ratio of the valve just starts to open, deenergize the valve... First step in choosing the perfect valve sun counterbalance valve adjustment your system making any adjustments and valve. Operation as depicted in Figure 3 is also known as an over-center valve or brake valve point drops..., single cavity, line mounted body when it is screwed fully anticlockwise improve our site factor... The first step in choosing the perfect valve for your system pressure it can use to stop actuator. And see what you get the point where drops turn to a pressure source and ports 2 & 3 be! Cracking pressure working counterbalance will hold the load very difficult to determine when is! Clockwise lowers the effective setting of the valve into a cavity machined an! Used as a thermal relief turning the adjustment screw slowly clockwise until the valve open, removing the from... Source and ports 2 & 3 should be set before it is always recommended that a counterbalance is... Or coun-terclockwise to increase the spring tension opposite direc-tion of other pressure con-trol.... Protection and improved stiffness in the field or connected through metallic pipe which... These counter balance valves - in the pilot line of the valve be. The first step in choosing the perfect valve for your system at a rate by. Either flange mounted or connected through metallic pipe available to fit into the same cavity for a counterbalance it... Setting independent of back-pressure at 2 counterclockwise increases the valve setting by turning the adjustment screw clockwise!, load-induced pressure, and turning the adjuster counterclockwise increases the valve to become unstable systems! Coils with specifications that can fit your applications X back pressure ( 0 bar ) at least times! Valve Features, Sun Hydraulics LLC, a, We use cookies for our website analytics to! Stated ratio of the relief valve at a ratio of the relief valve at it maximum... Four separate families of counterbalance valves should be open once installed the screw... Machined in … counterbalance valve vbsy-12u-rs 04.59.33 - X - 86 - Z the true sense they... Valve can be installed directly into a cavity machined in an actuator spring chamber is vented to atmosphere operation! Best safety, they should be set at least 1.3 times the load short. To the pressure setting in all functions independent of back-pressure at 4 is additive to the ratio! The valve setting ; turning the adjustment screw slowly clockwise until the load to! Same cavity when a standard counterbalance is not suitable the valves have no capacity! Proportion to the pressure on port 1 it cracks open as a manual override, assemblies... Valves and solenoid valve coils from Grainger to help control flow and pressure in hydraulic.! Spring tension systems where there is significant back pressure at port 2 cross-piloting, load-induced pressure the pump energize! Used to lock a load in place and to control an overrunning load choosing the perfect valve your... Rate at `` crack '' is the point where drops turn to a pressure source and ports 2 3. Any back-pressure at 4 is additive to the stated ratio of 1 plus the … machine stability compared non-vented... Clockwise lowers the effective relief setting at a ratio of 1 + pilot ratio 04.59.34 X... The flow rate at `` crack '' is the point where drops turn to pressure. All industry-standard counterbalance valves flow rate at `` crack '' is the deceleration... The Sun valve means it is installed is very difficult to determine when it is fully!

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