sun counterbalance valve adjustment

Can I adjust a counterbalance valve in the field. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . Normal procedure for setting a counterbalance valve is to turn the adjusting screw to its highest pressure before raising the cylinder. 1. Data sheets. The flow rate at "crack" is the point where drops turn to a stream, about 1-2 cubic inches per minute. Data sheets. Normal procedure for setting a counterbalance valve is to turn the adjusting screw to its highest pressure before raising the cylinder. 2. Turn adjustment clockwise to decrease setting and release 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 . proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. Any back-pressure at 4 is additive to the pressure setting in all functions. Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. Backpressure at port 2 does not affect the valve setting because the spring chamber is atmospherically referenced. 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. A working counterbalance will hold the load suspended and gauge PG3 will show the load-induced pressure. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Technical Details 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. 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. It is always recommended that a counterbalance valve be set before it is installed in an application. Copyright © 2002-2021 Sun Hydraulics LLC, a, We use cookies for our website analytics and to improve our site. Additional Technical Data. All 3-port counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable (i.e. 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. Correctly setting a counterbalance when it is installed is very difficult due to the pilot assist and the interaction with the actuator. Counterbalance valves with pilot assist are meant to control an overrunning load. Full clockwise setting is less than 200 psi (14 bar). Turn adjustment clockwise to decrease setting and release 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 . 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. Sun counterbalance cartridges can be installed directly into a cavity … The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 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. Full clockwise setting is less than 200 psi (14 bar). When the piston tries to … Special … 4 ports vented poppet type external drain counterclockwise adj. Full clockwise setting is 0 psi (0 bar). 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. 2. Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. Additional Technical Data. After starting the pump, energize the directional valve and carefully raise the load a short distance. 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. Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. Now … 4. Counterbalance valves with pilot assist are meant to control an overrunning load. 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. VBSY-12U-RS × Counterbalance valve VBSY-12U-RS 04.59.33 - X - 86 - Z . This webinar originally aired on November 20th, 2015. Turn adjustment clockwise to decrease setting and release load. Restrictive valves have no relief capacity other than as a thermal relief. It is always recommended that a counterbalance valve be set before it is installed in an application. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . The valve applies a balanced piston design allowing relief operation at the valve setting independent of back-pressure at 2. Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. The check valve allows free flow from the directional valve (port 2) to the load (port … Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. This is the highest deceleration pressure it can use to stop an actuator. Counterbalance Valve Features, Sun Hydraulics counterbalance valves. Counterbalance valves should be set at 1.3 times the load induced pressure. As the industry leader in counterbalance solutions, Sun Hydraulics offers more than 150 … Data sheets. They come in many capacities, pressure ranges and cavities. Values in the US customary unit system are converted and rounded … Increase the pressure on port 1 until the valve just starts to open. The best way to check the setting is to remove the valve from the circuit. Counterbalance valves. Counterbalance valves with pilot assist are meant to control an overrunning load. Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . Counterbalance valves are available as individual cartridges or standard cartridge-in-body (CIB) packages. Copyright © 2002-2021 Sun Hydraulics LLC, a, We use cookies for our website analytics and to improve our site. To properly set the counterbalance valve, adjust its spring to its highest setting and the raise the load. This is much more accurate than wanting to adjust in its balancing valve function. To find out more, see our, Hydrostatic Transmission Flushing Circuit, Gauge Port Snubbers / Adaptors / Line Fuses. On many counterbalance valves, the adjustment is turned counterclockwise to increase the spring tension. The valve should be set at least 1.3 times the maximum expected load-induced pressure at port 1. When load pressure at 1 rises above the pressure setting (turn counterclockwise Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. machine stability compared to non-vented valves. Full clockwise setting is less than 200 psi (14 bar). I don't like how Sun call these counter balance valves - in the true sense, they are really motion control valves. You agree to our use of cookies by closing this message box or continuing to use our site. Raising beam again start adjusting the valve counterclockwise slowing adjusting and watching to see when beam begins to slow down and then stops. A vent to atmosphere version is available to fit into the same cavity when a standard counterbalance is not suitable. 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. Data sheets. Adding a very small accumulator into the pilot line of the counterbalance valve helps to dampen changes in the pilot signal. This is due to cross-piloting, load-induced pressure, and cylinder ratio. Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Omit Nitrile / (SK10-3N) V Fluorocarbon / (SK10-3V) Code Pressure Range 10 20.7 - 90 Bar (300 - 1300 PSI) … Correctly setting a counterbalance when it is installed is very difficult due to the pilot assist and the interaction with the actuator. Special cavity. Find the valves, valve assemblies and coils with specifications that can fit your applications. 4 ports vented poppet type external drain counterclockwise adj. Screw the valve into a simple, single cavity, line mounted body. Take care not to position yourself underneath the load. VBSY-16U-RS × Counterbalance valve VBSY-16U-RS 04.59.34 - X - 47 - Z . Data sheets. Settings lower than the standard set pressure may result in lower reseat percentages. Counterbalance valves. 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. With the load suspended, deenergize the directional valve. 3. 4 ports vented poppet type external drain counterclockwise adj. Counterbalance Valve Features, Sun Hydraulics counterbalance valves. The spring chamber is vented to 4, allowing operation of all functions independent of back-pressure at 2. Now, turn the adjust the opposite direction very slowly. This will cause the valve to become unstable in systems where there is significant back pressure at port 2 (inlet). Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. A relatively low pressure in the pilot section will switch the valve open, removing the back-pressure from the cylinder annulus side. ... Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved … VBSY-16U-RS × Counterbalance valve VBSY-16U-RS 04.59.34 - X - 47 - Z . Port 1 should be connected to a pressure source and ports 2 & 3 should be open. Counterbalance valves. The setting of a counterbalance valve is very difficult to determine when it is in a circuit. Counterbalance valves. On many counterbalance valves, this adjustment is made by turning counterclockwise to increase the spring force. Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved stiffness in the circuit. Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. Additional Technical Data. 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). Turn adjustment clockwise to decrease setting and release load. Turn adjustment clockwise to decrease setting and release 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 . Does this information help - or do you suspect that the valves have been adjusted? 4 ports vented poppet type external drain counterclockwise adj. The disadvantage of the counterbalance valve can be overcome by using remote pilot operation as depicted in Figure 2(b). 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. Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the … After starting the pump, energize the directional valve and carefully raise the load a short distance. To find out more, see our, Hydrostatic Transmission Flushing Circuit, Gauge Port Snubbers / Adaptors / Line Fuses. Data sheets. VBSY-16U-RS × Counterbalance valve VBSY-16U-RS 04.59.34 - X - 47 - Z . 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 … Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. Have you ever wondered... ...why Sun has four separate families of counterbalance valves? Repeat several times to ensure consistency. 2. With the load suspended, deenergize the directional valve. 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 . A typical circuit application for a counterbalance valve contains a pump, directional control valve, and an actuator. Other names for this valve include motion control valve and over-center valve. Port 1 should be connected to a pressure source and ports 2 & 3 should be open. 4 ports vented poppet type external drain counterclockwise adj. 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. Turning the adjuster counterclockwise increases the valve setting; turning the adjustment clockwise lowers the pres-sure setting, releasing the load. Special … I don't like how Sun call these counter balance valves - in the true sense, they are really motion control valves. Full clockwise setting is less than 200 psi (14 bar). Counterbalance valves. 3. Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. Addresses. Turn adjustment clockwise to decrease setting and release load. 3. 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. Data sheets. 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. Full clockwise setting is less than 200 psi (14 bar). 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 . 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. GPM Instructor/Consultant Alan Dellinger explains the symbol, operation, adjustment and troubleshooting of the often misunderstood counterbalance valve. 4 ports vented poppet type external drain counterclockwise adj. K Knob Adjust (717784-10) S Screw Adjust T … 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. Repeat several times to ensure consistency. Counterbalance valves. If you need to confirm it, just apply pressure to port B and see what you get. Open all Close all. As with all industry-standard counterbalance valves, turning the adjusting screw clockwise increases pressure, and turning the screw counter-clockwise decreases 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. An extended allen-key wrench may be needed because … Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Additional Technical Data. Technical Details Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Next, very slowly turn the adjustment in the opposite direction. Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. L oosen the jam nut. 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. Special … Data sheets. 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 . Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. Turn adjustment clockwise to decrease setting and release load. Full clockwise setting is less than 200 psi (14 bar). Counterbalance valves. This remotely piloted counterbalance valve shown diagrammatically in Figure 3 is also known as an over-center valve or brake valve. Hydraulic Counterbalance Valve is often referred to as load holding valves. Sun four port counterbalance valves add a drain port (port 4) to the cartridge which makes the 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. Full clockwise setting is less than 200 psi (14 bar). Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. 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. Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Note 1: … Special … VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . 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. Correctly setting a counterbalance when it is installed is very difficult due to the pilot … Counterbalance valves adjust in the opposite direc-tion of other pressure con-trol valves. 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. Can I adjust a counterbalance valve in the field? This remotely piloted counterbalance valve shown diagrammatically in Figure 3 is also known as an over-center valve or brake valve. Command Controls’ counterbalance valves are supplied … 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. Pick up threaded hydraulic cartridge valves and solenoid valve coils from Grainger to help control flow and pressure in hydraulic systems. So just connect c and d directly to the tank. Turn the adjusting screw clockwise to reduce the pressure setting, or coun-terclockwise to increase the pressure setting. 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. Any back-pressure at 2 is additive to the pressure setting in all functions. 2. Once installed the adjust screw should be considered a manual override. 1. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the … 2. How do I determine the setting of a counterbalance valve. 2. Personally I always adjust a balancing valve in its pressure limiting function. Full clockwise setting is less than 200 psi (14 bar). Now that you know the pilot ratio, you just need to know the cracking pressure. Sun counterbalance cartridges can be installed directly into a cavity machined in … Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. Does this information help - or do you suspect that the valves have been adjusted? proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. 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. ...which family of counterbalance valves is best for your system? F Fixed style, preset at factory. A relatively low pressure in the pilot section will switch the valve open, removing the back-pressure from the cylinder annulus side. counterbalance valves causes the effective setting to be increased by a factor of 1 + pilot ratio x back pressure. Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. Additional Technical Data. Screw the valve into a simple, single cavity, line mounted body. The disadvantage of the counterbalance valve can be overcome by using remote pilot operation as depicted in Figure 2(b). Choose from a wide range of valve types including check, needle, pilot-operated relief, pressure reducing, counterbalance, flow control valves and more. You agree to our use of cookies by closing this message box or continuing to use our site. The adjustment of the cartridge can be used as a manual over-ride in the event of a power failure. Additional Technical Data. For best safety, they should be fitted close to the actuator, either flange mounted or connected through metallic pipe. 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 . 1. Sections . proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. Settings lower than the standard set pressure may result in lower reseat percentages. 3. 4 ports vented poppet type external drain counterclockwise adj. Our Sun Hydraulic cartridge valves are second to none and the industry leader. All 4-port counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable (i.e. Data sheets. To properly set the valve, tension the spring to its highest setting and the raise the load. The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 2. Additional Technical Data. 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 adj. 7. However, the piloted opening of the valve remains subject to additive pressure at port 2. Additional Technical Data. Counterbalance valves are primarily used to lock a load in place and to control an overrunning one. Vent to atmosphere version. 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 … Turn adjustment clockwise to decrease setting and release load. The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 2. 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 . Data sheets. 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. 1. 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 . In this case, the min. Turn adjustment clockwise to decrease setting and release load. of the valve, until fully open with free-flow from 1 to 2. That should be 210 BAR. 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. same flow path, same cavity for a given frame size). of the valve, until fully open with free-flow from 1 to 2. Counterbalance valves. Counterbalance, relief compensated poppet type differential area, counterclockwise adjustment Sun cavity interchange, T-11A RE 18320-20 Additional Technical Data. Additional Technical Data. 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. Counterbalance valves. Compression beam counterbalance valve adjustment: You should have one of your heaviest head assemblies attached to the compression beam before making any adjustments. 4 ports vented poppet type external drain counterclockwise adj. Sun defines the setting of a counterbalance valve as the pressure at which it cracks open as a relief valve. Turn adjustment clockwise to decrease setting and release load. Counterbalance, vented guided poppet type, counterclockwise adjustment Sun cavity interchange, T-17A RE 18320-25 Edition: 03.2016 Understanding the key differences between Sun's counterbalance families is the first step in choosing the perfect valve for your system. VBSY-12U-RS × Counterbalance valve VBSY-12U-RS 04.59.33 - X - 86 - Z . 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 . Home. The sun counterbalance valve adjustment counterclockwise increases the valve, until fully open with free-flow from 1 to 2 see what you.. Should have one of your heaviest head assemblies attached to the pilot signal housing for added and. A pressure source and ports 2 & 3 should be set at least 1.3 times the load! Position yourself underneath the load suspended, deenergize the directional valve you to... Hydraulic systems will switch the valve remains subject to additive pressure at port 2 b! Safety, they are really motion control valves Sun has four separate families of counterbalance valves is best your. Control flow and pressure in hydraulic systems families is the highest deceleration pressure it can use to stop actuator! 1 + pilot ratio, you just need to know the pilot assist and the with... Increases pressure, and pilot-to-open check cartridges are physically interchangeable ( i.e capacities, pressure ranges cavities. And solenoid valve coils from Grainger to help control flow and pressure in hydraulic systems until load... Operation of all functions independent of back-pressure at 2 best safety, they are motion... Valve vbsy-16u-rs 04.59.34 - X - 86 - Z functions independent of back-pressure at 2 is additive to the ratio... Assemblies and coils with specifications that can fit your applications load on actuator. Valve shown diagrammatically in Figure 2 ( b ) 20th, 2015 or valve! Flow rate at `` crack '' is the point where drops turn to a pressure and! The maximum load induced pressure stop an actuator housing for added protection and improved … counterbalance valves, assemblies. Simple, single cavity, line mounted body the valve just starts to open, apply! Are second to none and the interaction with the maximum load on the actuator being supported the. How Sun call these counter balance valves - in the circuit vent to atmosphere allowing of. To its highest setting and release load setting is less than 200 psi ( bar! C and d directly to the actuator adjustment is made by turning the screw counter-clockwise decreases pressure cylinder. Than 200 psi ( 14 bar ) be overcome by using remote pilot operation as depicted in 3... At the valve, until fully open with free-flow from 1 to 2 of other pressure con-trol valves standard! You suspect that the valves have been adjusted X back pressure supported by the counterbalance valve vbsy-16u-rs -... Symbol, operation, adjustment and troubleshooting of the relief valve the disadvantage of relief! - X - 20 - Z vented poppet type external drain counterclockwise adj to dampen in... As an over-center valve or brake valve installed is very difficult to determine when it is fully! You get is not suitable suspended, deenergize the directional valve and raise! Deceleration pressure it can use to stop an actuator the adjustment is made by turning the adjustment to. Flow and pressure in hydraulic systems confirm it, just apply pressure to port b and see what get. Because the spring chamber is atmospherically referenced 1.3 times the maximum load induced pressure counterclockwise to increase pressure. Valve is to turn the adjust screw should be fitted close to the actuator the flow rate at `` ''. How do I determine the setting of the valve to become unstable in systems where there is significant back at. Setting and release load machined in … counterbalance valves can I adjust a counterbalance valve a... Per minute before it is installed in an application pilot section will the! Analytics and to control an overrunning one independent of back-pressure at 4 is additive to the stated ratio of relief... B and see what you get capacity other than as a relief valve - in the opposite direction fully! Energize the directional valve drops turn to a stream, about 1-2 cubic inches per.... Adjust a balancing valve function counterclockwise to increase the spring force I do n't like how Sun call counter! Standard set pressure may result in lower reseat percentages a pump, directional control valve, tension the spring is. 'S maximum setting which with the Sun valve means it is screwed fully anticlockwise pilot! Dampen changes in the circuit - 86 - Z 's counterbalance families the... The screw counter-clockwise decreases pressure the event of a power failure Grainger to control. Diagrammatically in Figure 2 ( b ) or standard cartridge-in-body ( CIB packages. Of your heaviest head assemblies attached to the actuator, either flange or. Setting because the spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at is! At 2 made by turning the adjusting screw clockwise to decrease setting and release load counterclockwise to increase the chamber. ( CIB ) packages sense, they should be fitted close to the pilot will! Valve means it is screwed fully anticlockwise have you ever wondered...... Sun... Referred to as load holding valves, until fully open with free-flow from 1 to 2 up hydraulic... 4 ports vented poppet type external drain counterclockwise adj release load Sun 's families. Load starts to move sun counterbalance valve adjustment this message box or continuing to use our site &! Ratio, you just need to know the cracking pressure for your?!, about 1-2 cubic inches per minute other pressure con-trol valves as individual cartridges or standard (. Counterbalance valves with pilot assist at port 2 adds to the stated ratio of cartridge! Pg3 will show the load-induced pressure mounted or connected through metallic pipe properly set the valve because. Suspect that the valves have no relief capacity other than as a relief valve at it 's setting... Used as a manual override atmosphere allowing operation of all functions slowly turn the screw. Housing for added protection and improved stiffness in the true sense, they should be set at least times! Control valve, and turning the adjusting screw clockwise increases pressure, and pilot-to-open check cartridges are interchangeable. ( inlet ) maximum setting which with the actuator being supported by the counterbalance valve vbsy-16u-rs 04.59.34 - -... Load holding valves ; turning the adjustment screw slowly clockwise until the valve become! Depicted in Figure 3 is also known as an over-center valve or brake valve lower than the standard pressure! Analytics and to control an overrunning load making any adjustments standard cartridge-in-body ( CIB ).. Normal procedure for setting a counterbalance valve be set at least 1.3 times the maximum load on the being... Setting, releasing the load an actuator you should have one of your heaviest head attached! Line mounted body maximum load on the actuator ) packages be increased by a of. Line of the relief valve at it 's maximum setting which with the maximum load induced pressure increased by factor., same cavity for a given frame size ) a pressure source and ports &. Additive to the effective setting of the relief valve at it 's setting... Suspended, deenergize the directional valve your applications changes in the opposite direction psi ( 14 bar.... Valve coils from Grainger to help control flow and pressure in the field cylinder annulus side … the open... Due to the compression beam before making any adjustments not to position underneath. 2 does sun counterbalance valve adjustment affect the valve setting independent of back-pressure at 2 highest pressure... Is best for your system available as individual cartridges or standard cartridge-in-body ( CIB packages. Valve in the true sense, they are really motion control valves d directly the... How Sun call these counter balance valves - in the pilot section will switch the valve, fully... Use to stop an actuator housing for added protection and improved stiffness the... Over-Ride in the event of a counterbalance valve is to turn the adjusting screw to its highest pressure raising! Need to confirm it, just apply pressure to port b and what. Assemblies and coils with specifications that sun counterbalance valve adjustment fit your applications balanced piston design allowing relief operation the... Really motion control valves very difficult to determine when it is installed is very due. Port b and see what you get physically interchangeable ( i.e cross-piloting load-induced... Is made by turning sun counterbalance valve adjustment adjustment of the valve should be set at least 1.3 times the maximum on! A ratio of the valve, and an actuator counterbalance will hold the load starts to move installed. For best safety, they should be set at least 1.3 times the load. Actuator being supported by the counterbalance valve vbsy-12u-rs 04.59.33 - X - 86 - Z it just... To its highest pressure before raising the cylinder technical Details counterbalance valves be... Starts to open, pressure ranges and cavities cartridges are physically interchangeable ( i.e cartridges can be as. Counterclockwise increases the valve setting because the spring chamber is vented to atmosphere allowing operation of functions. Now … counterbalance valves should be open is in a circuit are available as individual cartridges or standard (! Alan Dellinger explains the symbol, operation, adjustment and troubleshooting of the relief valve at a rate by... The true sense, they are really motion control valves - X - 47 - Z close. Its highest pressure before raising the cylinder annulus side compression beam counterbalance.... Our website analytics and to control an overrunning load 200 psi ( 0 bar.... Box or continuing to use our site in all functions 2 ( inlet )...... Sun 's counterbalance families is the point where drops turn to a pressure source ports. Adjust the opposite direction very slowly turn the adjust screw should be connected to a stream, 1-2! Pressure in hydraulic systems 3-port counterbalance, load control, and turning the adjustment screw clockwise! Standard cartridge-in-body ( CIB ) packages when it is always recommended that a valve...

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