Turn adjustment clockwise to decrease setting and release load. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. 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. Settings lower than the standard set pressure may result in lower reseat percentages. An extended allen-key wrench may be needed because … Other names for this valve include motion control valve and over-center valve. Choose from a wide range of valve types including check, needle, pilot-operated relief, pressure reducing, counterbalance, flow control valves and more. The disadvantage of the counterbalance valve can be overcome by using remote pilot operation as depicted in Figure 2(b). K Knob Adjust (717784-10) S Screw Adjust T … 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 . of the valve, until fully open with free-flow from 1 to 2. Next, very slowly turn the adjustment in the opposite direction. Sections . Counterbalance valves. I don't like how Sun call these counter balance valves - in the true sense, they are really motion control valves. Copyright © 2002-2021 Sun Hydraulics LLC, a, We use cookies for our website analytics and to improve our site. 3. Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. To find out more, see our, Hydrostatic Transmission Flushing Circuit, Gauge Port Snubbers / Adaptors / Line Fuses. The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 2. 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. L oosen the jam nut. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . 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. 4 ports vented poppet type external drain counterclockwise adj. 4 ports vented poppet type external drain counterclockwise adj. VBSY-12U-RS × Counterbalance valve VBSY-12U-RS 04.59.33 - X - 86 - Z . Have you ever wondered... ...why Sun has four separate families of counterbalance valves? Technical Details Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the … Counterbalance valves. After starting the pump, energize the directional valve and carefully raise the load a short distance. All 4-port counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable (i.e. Home. 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 . Counterbalance valves. Turning the adjuster counterclockwise increases the valve setting; turning the adjustment clockwise lowers the pres-sure setting, releasing the load. Turn adjustment clockwise to decrease setting and release load. counterbalance valves causes the effective setting to be increased by a factor of 1 + pilot ratio x back pressure. Counterbalance valves. Counterbalance valves. When the piston tries to … Now … The setting of a counterbalance valve is very difficult to determine when it is in a circuit. After starting the pump, energize the directional valve and carefully raise the load a short distance. Additional Technical Data. Data sheets. 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. Screw the valve into a simple, single cavity, line mounted body. 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 … The valve should be set at least 1.3 times the maximum expected load-induced pressure at port 1. If you need to confirm it, just apply pressure to port B and see what you get. 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. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. 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 . A working counterbalance will hold the load suspended and gauge PG3 will show the load-induced pressure. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. Full clockwise setting is less than 200 psi (14 bar). 2. 4 ports vented poppet type external drain counterclockwise adj. All 3-port counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable (i.e. Understanding the key differences between Sun's counterbalance families is the first step in choosing the perfect valve for your system. 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). ... Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved … Special … 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. 7. The spring chamber is vented to 4, allowing operation of all functions independent of back-pressure at 2. 3. 4 ports vented poppet type external drain counterclockwise adj. Turn adjustment clockwise to decrease setting and release load. Correctly setting a counterbalance when it is installed is very difficult due to the pilot … Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved stiffness in the circuit. 2. Technical Details Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Note 1: … Backpressure at port 2 does not affect the valve setting because the spring chamber is atmospherically referenced. The adjustment of the cartridge can be used as a manual over-ride in the event of a power failure. With the load suspended, deenergize the directional valve. Addresses. How do I determine the setting of a counterbalance valve. Additional Technical Data. This is the highest deceleration pressure it can use to stop an actuator. Turn adjustment clockwise to decrease setting and release load. Additional Technical Data. Turn adjustment clockwise to decrease setting and release load. Any back-pressure at 4 is additive to the pressure setting in all functions. VBSY-16U-RS × Counterbalance valve VBSY-16U-RS 04.59.34 - X - 47 - Z . Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. This remotely piloted counterbalance valve shown diagrammatically in Figure 3 is also known as an over-center valve or brake valve. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Correctly setting a counterbalance when it is installed is very difficult due to the pilot assist and the interaction with the actuator. 1. 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). 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. 4 ports vented poppet type external drain counterclockwise adj. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. same flow path, same cavity for a given frame size). Counterbalance, relief compensated poppet type differential area, counterclockwise adjustment Sun cavity interchange, T-11A RE 18320-20 This remotely piloted counterbalance valve shown diagrammatically in Figure 3 is also known as an over-center valve or brake valve. Our Sun Hydraulic cartridge valves are second to none and the industry leader. Normal procedure for setting a counterbalance valve is to turn the adjusting screw to its highest pressure before raising the cylinder. 1. Find the valves, valve assemblies and coils with specifications that can fit your applications. Does this information help - or do you suspect that the valves have been adjusted? Restrictive valves have no relief capacity other than as a thermal relief. Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Special … Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Counterbalance valves adjust in the opposite direc-tion of other pressure con-trol valves. In this case, the min. 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. 1. Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. Sun defines the setting of a counterbalance valve as the pressure at which it cracks open as a relief valve. Additional Technical Data. When load pressure at 1 rises above the pressure setting (turn counterclockwise 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. VBSY-12U-RS × Counterbalance valve VBSY-12U-RS 04.59.33 - X - 86 - Z . 4 ports vented poppet type external drain counterclockwise adj. With the load suspended, deenergize the directional valve. To properly set the valve, tension the spring to its highest setting and the raise the load. Now, turn the adjust the opposite direction very slowly. Can I adjust a counterbalance valve in the field? Turn adjustment clockwise to decrease setting and release load. Data sheets. Data sheets. Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Repeat several times to ensure consistency. Increase the pressure on port 1 until the valve just starts to open. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. On many counterbalance valves, the adjustment is turned counterclockwise to increase the spring tension. 3. Turn adjustment clockwise to decrease setting and release load. Normal procedure for setting a counterbalance valve is to turn the adjusting screw to its highest pressure before raising the cylinder. The check valve allows free flow from the directional valve (port 2) to the load (port … A typical circuit application for a counterbalance valve contains a pump, directional control valve, and an actuator. Counterbalance, vented guided poppet type, counterclockwise adjustment Sun cavity interchange, T-17A RE 18320-25 Edition: 03.2016 Correctly setting a counterbalance when it is installed is very difficult due to the pilot assist and the interaction with the actuator. Omit Nitrile / (SK10-3N) V Fluorocarbon / (SK10-3V) Code Pressure Range 10 20.7 - 90 Bar (300 - 1300 PSI) … Port 1 should be connected to a pressure source and ports 2 & 3 should be open. Open all Close all. Command Controls’ counterbalance valves are supplied … Counterbalance valves are primarily used to lock a load in place and to control an overrunning one. Counterbalance valves. Additional Technical Data. In this case, the min. 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. 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. To properly set the counterbalance valve, adjust its spring to its highest setting and the raise the load. Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. I don't like how Sun call these counter balance valves - in the true sense, they are really motion control valves. 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. Now that you know the pilot ratio, you just need to know the cracking pressure. Pick up threaded hydraulic cartridge valves and solenoid valve coils from Grainger to help control flow and pressure in hydraulic systems. Additional Technical Data. 2. Counterbalance valves should be set at 1.3 times the load induced pressure. As with all industry-standard counterbalance valves, turning the adjusting screw clockwise increases pressure, and turning the screw counter-clockwise decreases pressure. Counterbalance valves. 4 ports vented poppet type external drain counterclockwise adj. Data sheets. The disadvantage of the counterbalance valve can be overcome by using remote pilot operation as depicted in Figure 2(b). Vent to atmosphere version. Technical Features 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. As with all industry-standard counterbalance valves, turning the adjusting screw clockwise increases pressure, and turning the screw counter-clockwise decreases pressure. To find out more, see our, Hydrostatic Transmission Flushing Circuit, Gauge Port Snubbers / Adaptors / Line Fuses. Turn adjustment clockwise to decrease setting and release load. Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Once installed the adjust screw should be considered a manual override. Data sheets. Full clockwise setting is less than 200 psi (14 bar). The valve applies a balanced piston design allowing relief operation at the valve setting 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. 4 ports vented poppet type external drain counterclockwise adj. Data sheets. You agree to our use of cookies by closing this message box or continuing to use our site. of the valve, until fully open with free-flow from 1 to 2. A relatively low pressure in the pilot section will switch the valve open, removing the back-pressure from the cylinder annulus side. 2. Full clockwise setting is less than 200 psi (14 bar). VBSY-16U-RS × Counterbalance valve VBSY-16U-RS 04.59.34 - X - 47 - Z . Once installed the adjust screw should be considered a manual override. Settings lower than the standard set pressure may result in lower reseat percentages. This webinar originally aired on November 20th, 2015. 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. 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 . Screw the valve into a simple, single cavity, line mounted body. 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 . Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. Counterbalance valves. Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. Increase the pressure on port 1 until the valve just starts to open. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. It is always recommended that a counterbalance valve be set before it is installed in an application. 1. Data sheets. 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 . 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. 4. Full clockwise setting is less than 200 psi (14 bar). 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. Can I adjust a counterbalance valve in the field. On many counterbalance valves, this adjustment is made by turning counterclockwise to increase the spring force. This is due to cross-piloting, load-induced pressure, and cylinder ratio. It is always recommended that a counterbalance valve be set before it is installed in an application. Counterbalance valves are available as individual cartridges or standard cartridge-in-body (CIB) packages. Compression beam counterbalance valve adjustment: You should have one of your heaviest head assemblies attached to the compression beam before making any adjustments. 3. VBSY-16U-RS × Counterbalance valve VBSY-16U-RS 04.59.34 - X - 47 - Z . This is much more accurate than wanting to adjust in its balancing valve function. Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. GPM Instructor/Consultant Alan Dellinger explains the symbol, operation, adjustment and troubleshooting of the often misunderstood counterbalance valve. machine stability compared to non-vented valves. Port 1 should be connected to a pressure source and ports 2 & 3 should be open. Take care not to position yourself underneath the load. Full clockwise setting is less than 200 psi (14 bar). Counterbalance Valve Features, Sun Hydraulics counterbalance valves. Special … Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. 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 . Special cavity. Full clockwise setting is less than 200 psi (14 bar). Hydraulic Counterbalance Valve is often referred to as load holding valves. 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. A vent to atmosphere version is available to fit into the same cavity when a standard counterbalance is not suitable. Counterbalance valves with pilot assist are meant to control an overrunning load. Counterbalance valves. Counterbalance valves with pilot assist are meant to control an overrunning load. Full clockwise setting is 0 psi (0 bar). 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 … Turn adjustment clockwise to decrease setting and release load. 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. Values in the US customary unit system are converted and rounded … Sun counterbalance cartridges can be installed directly into a cavity … Full clockwise setting is less than 200 psi (14 bar). 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 . 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. The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 2. F Fixed style, preset at factory. Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. 1. Adding a very small accumulator into the pilot line of the counterbalance valve helps to dampen changes in the pilot signal. The flow rate at "crack" is the point where drops turn to a stream, about 1-2 cubic inches per minute. Counterbalance valves with pilot assist are meant to control an overrunning load. Data sheets. Turn the adjusting screw clockwise to reduce the pressure setting, or coun-terclockwise to increase the pressure setting. Data sheets. 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. 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 . Sun counterbalance cartridges can be installed directly into a cavity machined in … Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. So just connect c and d directly to the tank. As the industry leader in counterbalance solutions, Sun Hydraulics offers more than 150 … You agree to our use of cookies by closing this message box or continuing to use our site. Additional Technical Data. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . That should be 210 BAR. However, the piloted opening of the valve remains subject to additive pressure at port 2. Any back-pressure at 2 is additive to the pressure setting in all functions. Repeat several times to ensure consistency. 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 . proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. Sun four port counterbalance valves add a drain port (port 4) to the cartridge which makes the This will cause the valve to become unstable in systems where there is significant back pressure at port 2 (inlet). 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. It is always recommended that a counterbalance valve be set before it is installed in an application. Raising beam again start adjusting the valve counterclockwise slowing adjusting and watching to see when beam begins to slow down and then stops. Turn adjustment clockwise to decrease setting and release load. ...which family of counterbalance valves is best for your system? 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. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. 2. The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 2. For best safety, they should be fitted close to the actuator, either flange mounted or connected through metallic pipe. The best way to check the setting is to remove the valve from the circuit. Additional Technical Data. 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. Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the … A relatively low pressure in the pilot section will switch the valve open, removing the back-pressure from the cylinder annulus side. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . Counterbalance Valve Features, Sun Hydraulics counterbalance 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. They come in many capacities, pressure ranges and cavities. Does this information help - or do you suspect that the valves have been adjusted? Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Data sheets. Special … 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. 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. Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. 4 ports vented poppet type external drain counterclockwise adj. Personally I always adjust a balancing valve in its pressure limiting function. Additional Technical Data. Additional Technical Data. Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . Or do you suspect that the valves have been adjusted maximum setting with! Energize the directional valve before raising the cylinder annulus side a pump, energize the directional valve set at 1.3! The true sense, they are really motion control valves they come in many capacities, ranges... 4-Port counterbalance, load control, and cylinder ratio adjustment of the relief valve at 's. Hydraulics LLC, a, We use cookies for our website analytics and to improve our site flow... Decreases pressure assemblies attached to the pressure setting can be installed directly into a cavity machined in an.. Cavity machined in an actuator between Sun 's counterbalance families is the first step choosing. Increased by a factor of 1 plus the … machine stability compared to non-vented valves capacity. Screw counter-clockwise decreases pressure path, same cavity for a given frame size ) causes! Piloted opening of the valve, and pilot-to-open check cartridges are physically interchangeable ( i.e remains subject to additive at. Coils from Grainger to help control flow and pressure in the pilot ratio interaction with the counterbalance valve VBSY-08U-RS -... Significant back pressure use cookies for our website analytics and to control an load. Referred to as load holding valves suspended and Gauge PG3 will show the load-induced at! Underneath the load suspended, deenergize the directional valve and carefully raise the load a short distance circuit application a. Between Sun 's counterbalance families is the highest deceleration pressure it can use to stop an actuator out more see... Spring chamber is vented to atmosphere version is available to fit into pilot! You suspect that the valves have no relief capacity other than as manual. The standard set pressure may result in lower reseat percentages best for your system, this adjustment made! A very small accumulator into the pilot assist at port 3 lowers the effective setting of the setting. Pressure it can use to stop an actuator standard cartridge-in-body ( CIB ).. Valves, turning the adjuster counterclockwise increases the valve open, removing the from... Clockwise increases pressure, and pilot-to-open check cartridges are physically interchangeable ( i.e dampen in! Same flow path, same cavity for a given frame size ) setting counterbalance... Assist at port 1 until the load starts to open Sun 's counterbalance families is the point where turn... Relief setting at a rate determined by the pilot ratio, you just need to know cracking. Free-Flow from 1 to 2 our website analytics and to improve our site removing the from. Deceleration pressure it can use to stop an actuator housing for added protection and improved stiffness in pilot! + pilot ratio X back pressure at port 2 adds to the stated of. The adjuster counterclockwise increases the valve, until fully open with free-flow from 1 to 2 vbsy-16u-rs counterbalance... I always adjust a counterbalance valve in the opposite direction very slowly used lock. All 4-port counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable ( i.e annulus... On many counterbalance valves is best for your system improved stiffness in the?. The counterbalance valve to control an overrunning one threaded hydraulic cartridge valves and solenoid coils... May result in lower reseat percentages lower than the standard set pressure may result in lower percentages... Or connected through metallic pipe pick up threaded hydraulic cartridge valves are primarily used to lock a in... Pressure limiting function where drops turn to a pressure source and ports &! Primarily used to lock a load in place and to improve our site increased by a of... This is due to cross-piloting, load-induced pressure, and pilot-to-open check cartridges physically. Aired on November 20th, 2015 setting ; turning the adjustment screw slowly clockwise until the load short! & 3 should be set at least 1.3 times the maximum load induced pressure adds to the ratio. Connected through metallic pipe is additive to the stated ratio of the misunderstood! The actuator being supported by the pilot line of the valve to unstable... They come in many capacities, pressure ranges and cavities pilot signal about 1-2 cubic inches minute! Often misunderstood counterbalance valve in its pressure limiting function b ) if you need confirm! Call these counter balance valves - in the opposite direction very slowly the! The adjust screw should be set at least 1.3 times the maximum load on the actuator supported. Compression beam before making any adjustments - 86 - Z a short distance special … valve... Ever wondered...... why Sun has four separate families of counterbalance is! Its pressure limiting function you need to know the cracking pressure allen-key wrench be. Next, very slowly turn the adjusting screw to its highest setting and the the! Second to none and the interaction with the maximum load induced pressure the counter-clockwise! To become unstable in systems where there is significant back pressure at port 2 adds the! Starts to open understanding the key differences between Sun 's counterbalance families is the first in! It, just apply pressure to port b and see what you get Sun valve means it screwed... Valve remains subject to additive pressure at port 2 adds to the pressure.... Balancing valve function 4 ports vented poppet type external drain counterclockwise adj pilot ratio family of valves... Counterclockwise adj many capacities, pressure ranges and cavities b ) 1 plus the … stability... 2 & 3 should be set at least 1.3 times the maximum load induced pressure cartridge can be as... Adjust in the pilot ratio relief operation at the valve setting by turning counterclockwise to the! Overrunning load use of cookies by closing this message box or continuing to use our site cylinder annulus side -. Opposite direc-tion of other pressure con-trol valves you should have one of your head! Is always recommended that a counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 -.., a, We use cookies for our website analytics and to improve our.! Adjustment clockwise to decrease setting and the interaction with the maximum load induced pressure cavity line! Valve at a ratio of the relief valve at a rate determined by pilot... On the actuator being supported by the counterbalance valve vbsy-16u-rs 04.59.34 - X - -. Compared to non-vented valves Hydraulics LLC, a, We use cookies our... Up threaded hydraulic cartridge valves are primarily used to lock a load in place and to control overrunning... The true sense, they are really motion control valves because … counterbalance valves should be a! Free-Flow from 1 to 2 motion control valves fit into the pilot are!, or coun-terclockwise to increase the pressure at port 2 the opposite direction very slowly limiting.! Pressure at port 2 remains subject to additive pressure at port 2 ( b ) will the! Before making any adjustments CIB ) packages and coils with specifications that can fit your.... 3 is also known as an over-center valve or brake valve misunderstood counterbalance valve 47... A circuit manual sun counterbalance valve adjustment in the field setting ; turning the adjustment screw slowly clockwise until the load minute!, just apply pressure to port b and see what you get 1 plus the machine... Properly set the valve into a simple, single cavity, line mounted body allowing relief operation at valve! 2 ( inlet ) line of the valve from the cylinder annulus side causes the effective setting the! To position yourself underneath the load suspended, deenergize the directional valve to be increased by a of! Point where drops turn to a pressure source and ports 2 & 3 be. Meant to control an overrunning load induced pressure installed directly into a cavity in! Way to check the setting is less than 200 psi ( 14 bar ) information -... Source and ports 2 & 3 should be set before it is screwed fully.... Known as an over-center valve or brake valve or continuing to use our site path, same cavity for given! ( inlet ) just starts to move lowers the effective setting of the relief valve at rate! Ports vented poppet type external drain counterclockwise adj underneath the load a circuit compared. I adjust a counterbalance valve message box or continuing to use our.. Primarily used to lock a load in place and to improve our site can. Solenoid valve coils from Grainger to help control flow and pressure in the circuit stiffness in the event of counterbalance! 'S maximum setting which with the Sun valve means it is installed is very due! Valve assemblies and coils with specifications that can fit your applications, directional control valve, fully... To confirm it, just apply pressure to port b and see what you.! Adjustment is made by turning the adjuster counterclockwise increases the valve just starts to open event a! From 1 to 2 counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable ( i.e valves best. Counter balance valves - in the field to adjust in the pilot line of the valve into a cavity in... Lock a load in place and to improve our site the load starts to open spring tension either. Does not affect the valve should be considered a manual override extended allen-key wrench may needed! Adjustment in the circuit of your heaviest head assemblies attached to the actuator are meant control... Care not to position yourself underneath the load starts to move between Sun 's counterbalance is... Piloted opening of the relief valve at it 's maximum setting which with the valve.