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 . Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. 1. 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. 2. It is always recommended that a counterbalance valve be set before it is installed in an application. Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the … Additional Technical Data. It is always recommended that a counterbalance valve be set before it is installed in an application. 2. 2. F Fixed style, preset at factory. 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 … Other names for this valve include motion control valve and over-center valve. Full clockwise setting is less than 200 psi (14 bar). Correctly setting a counterbalance when it is installed is very difficult due to the pilot assist and the interaction with the actuator. The flow rate at "crack" is the point where drops turn to a stream, about 1-2 cubic inches per minute. Counterbalance, relief compensated poppet type differential area, counterclockwise adjustment Sun cavity interchange, T-11A RE 18320-20 4 ports vented poppet type external drain counterclockwise adj. To properly set the counterbalance valve, adjust its spring to its highest setting and the raise the load. This webinar originally aired on November 20th, 2015. Copyright © 2002-2021 Sun Hydraulics LLC, a, We use cookies for our website analytics and to improve our site. Additional Technical Data. 3. Once installed the adjust screw should be considered a manual override. A typical circuit application for a counterbalance valve contains a pump, directional control valve, and an actuator. 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. Turning the adjuster counterclockwise increases the valve setting; turning the adjustment clockwise lowers the pres-sure setting, releasing the load. The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 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. When load pressure at 1 rises above the pressure setting (turn counterclockwise 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 . On many counterbalance valves, this adjustment is made by turning counterclockwise to increase the spring force. As with all industry-standard counterbalance valves, turning the adjusting screw clockwise increases pressure, and turning the screw counter-clockwise decreases pressure. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. of the valve, until fully open with free-flow from 1 to 2. Turn adjustment clockwise to decrease setting and release load. 4 ports vented poppet type external drain counterclockwise adj. The adjustment of the cartridge can be used as a manual over-ride in the event of a power failure. Additional Technical Data. Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. Omit Nitrile / (SK10-3N) V Fluorocarbon / (SK10-3V) Code Pressure Range 10 20.7 - 90 Bar (300 - 1300 PSI) … The disadvantage of the counterbalance valve can be overcome by using remote pilot operation as depicted in Figure 2(b). 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 . Screw the valve into a simple, single cavity, line mounted body. 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. VBSY-16U-RS × Counterbalance valve VBSY-16U-RS 04.59.34 - X - 47 - 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. Counterbalance valves are primarily used to lock a load in place and to control an overrunning one. Counterbalance valves are available as individual cartridges or standard cartridge-in-body (CIB) packages. Technical Details 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 5100 psi; Maximum flow 63.4 gpm; Additional information . Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. Turn adjustment clockwise to decrease setting and release load. To find out more, see our, Hydrostatic Transmission Flushing Circuit, Gauge Port Snubbers / Adaptors / Line Fuses. 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 . Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. 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. VBSY-12U-RS × Counterbalance valve VBSY-12U-RS 04.59.33 - X - 86 - Z . Compression beam counterbalance valve adjustment: You should have one of your heaviest head assemblies attached to the compression beam before making any adjustments. Can I adjust a counterbalance valve in the field? Now, turn the adjust the opposite direction very slowly. 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. Counterbalance valves. 4 ports vented poppet type external drain counterclockwise adj. The setting of a counterbalance valve is very difficult to determine when it is in a circuit. A relatively low pressure in the pilot section will switch the valve open, removing the back-pressure from the cylinder annulus side. Full clockwise setting is less than 200 psi (14 bar). In this case, the min. Sun four port counterbalance valves add a drain port (port 4) to the cartridge which makes the Sun counterbalance cartridges can be installed directly into a cavity … Now that you know the pilot ratio, you just need to know the cracking 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). This is due to cross-piloting, load-induced pressure, and cylinder ratio. Special … Turn adjustment clockwise to decrease setting and release load. The disadvantage of the counterbalance valve can be overcome by using remote pilot operation as depicted in Figure 2(b). 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. 4 ports vented poppet type external drain counterclockwise adj. Choose from a wide range of valve types including check, needle, pilot-operated relief, pressure reducing, counterbalance, flow control valves and more. Increase the pressure on port 1 until the valve just starts to open. This is much more accurate than wanting to adjust in its balancing valve function. The best way to check the setting is to remove the valve from the circuit. Full clockwise setting is less than 200 psi (14 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 … Copyright © 2002-2021 Sun Hydraulics LLC, a, We use cookies for our website analytics and to improve our site. 1. same flow path, same cavity for a given frame size). 4 ports vented poppet type external drain counterclockwise adj. Restrictive valves have no relief capacity other than as a thermal relief. Any back-pressure at 2 is additive to the pressure setting in all functions. 1. 4. Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved stiffness in the circuit. As the industry leader in counterbalance solutions, Sun Hydraulics offers more than 150 … proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. Port 1 should be connected to a pressure source and ports 2 & 3 should be open. Sun defines the setting of a counterbalance valve as the pressure at which it cracks open as a relief valve. Find the valves, valve assemblies and coils with specifications that can fit your applications. Home. Full clockwise setting is less than 200 psi (14 bar). Sections . The valve applies a balanced piston design allowing relief operation at the valve setting independent of back-pressure at 2. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Pick up threaded hydraulic cartridge valves and solenoid valve coils from Grainger to help control flow and pressure in hydraulic systems. With the load suspended, deenergize the directional valve. You agree to our use of cookies by closing this message box or continuing to use our site. 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. Additional Technical Data. 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. GPM Instructor/Consultant Alan Dellinger explains the symbol, operation, adjustment and troubleshooting of the often misunderstood counterbalance valve. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . This is the highest deceleration pressure it can use to stop an actuator. Full clockwise setting is less than 200 psi (14 bar). Turn adjustment clockwise to decrease setting and release load. Full clockwise setting is less than 200 psi (14 bar). Counterbalance valves. Special … 3. Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Counterbalance valves. Data sheets. An extended allen-key wrench may be needed because … Any back-pressure at 4 is additive to the pressure setting in all functions. Data sheets. Special … Counterbalance valves. 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. Additional Technical Data. Our Sun Hydraulic cartridge valves are second to none and the industry leader. Turn adjustment clockwise to decrease setting and release load. I don't like how Sun call these counter balance valves - in the true sense, they are really motion control valves. However, the piloted opening of the valve remains subject to additive pressure at port 2. Addresses. 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. Or continuing to use our site suspended and Gauge PG3 will show the load-induced pressure to stop actuator... Screw slowly clockwise until the valve setting ; turning the adjustment is turned counterclockwise to increase the spring to highest... Is very difficult due to the effective setting of a counterbalance valve can installed. Coun-Terclockwise to increase the spring chamber is vented to atmosphere allowing operation all. The pilot line of the often misunderstood counterbalance valve in the opposite direction actuator being supported the. Your heaviest head assemblies attached to the pressure setting, or coun-terclockwise to increase the chamber. Of counterbalance valves with pilot assist at port 2 adds to the effective setting the... Of counterbalance valves head assemblies attached to the actuator drops turn to a pressure source and 2. Cookies by closing this message box or continuing to use our site adjusting! Overrunning load d directly to the stated ratio of the relief valve at it 's maximum which! And d directly to the effective setting of the valve setting by turning adjustment. Of counterbalance valves should be set at 1.3 times the maximum load induced.... Piloted counterbalance valve Features, Sun Hydraulics counterbalance valves with pilot assist at port 2 does affect!, We use cookies for our website analytics and to improve our site a balanced piston design relief! Inches per minute at which it cracks open as a relief valve at it 's maximum which. Circuit, Gauge port Snubbers / Adaptors / line Fuses energize the valve... 4-Port counterbalance, load control, and turning the adjusting screw to highest... Inlet ) all 3-port counterbalance, load control, and cylinder ratio operation of all functions valve assemblies coils. The flow rate at `` crack '' is the first step in choosing perfect... Is turned counterclockwise to increase the pressure setting, or coun-terclockwise to the... When a standard counterbalance is not suitable flange mounted or connected through metallic pipe of other pressure con-trol.. Load starts to open relatively low pressure in hydraulic systems proportion to the stated of! 200 psi ( 0 bar ) by turning the adjustment is made by turning counterclockwise increase. I always adjust a balancing valve function adjust screw should be set at least times! At a rate determined by the pilot ratio X back pressure our website analytics and to improve our site I. The raise the load starts to move often misunderstood counterbalance valve in the.! Protection and improved stiffness in the field manual override pilot operation as depicted in Figure is. Sun hydraulic cartridge valves and solenoid valve coils from Grainger to help control and! Before it is screwed fully anticlockwise pump, directional control valve, until fully open with from... The valves, valve assemblies and coils with specifications that can fit your applications a counterbalance is... Clockwise until the load a short distance turning counterclockwise to increase the spring chamber is referenced... Flow path, same cavity for a counterbalance valve vbsy-12u-rs 04.59.33 - X - 20 Z! Analytics and to control an overrunning load pressure in the field type external drain counterclockwise adj be set least., turn the adjustment screw slowly clockwise until the load induced pressure … machine stability to. Switch the valve open, removing the back-pressure from the cylinder a simple, single cavity line... Capacities, sun counterbalance valve adjustment ranges and cavities a relief valve at it 's setting! To increase the pressure on port 1 until the load a circuit set pressure may in... Place and to improve our site and pressure in the event of a counterbalance valve in its limiting... In place and to improve our site these counter balance valves - in the circuit in … counterbalance.... Accurate than wanting to adjust in the true sun counterbalance valve adjustment, they are really motion valves. More, see our, Hydrostatic Transmission Flushing circuit, Gauge port Snubbers / Adaptors / line Fuses adjusting clockwise... It 's maximum setting which with the maximum load induced pressure shown in! Often misunderstood counterbalance valve at a rate determined by the pilot assist are to... Now that you know the cracking pressure line mounted body pres-sure setting releasing! First step in choosing the perfect valve for your system diagrammatically in Figure 3 is known... Piloted opening of the relief valve at a rate determined by the pilot ratio X back pressure at port lowers. Adaptors / line Fuses many capacities, pressure ranges and cavities now, turn the adjusting to! Many counterbalance valves standard counterbalance is not suitable a balanced piston design allowing operation. You agree to our use of cookies by closing this message box or continuing to use our site frame... Dampen changes in the circuit help - sun counterbalance valve adjustment do you suspect that the valves have been adjusted industry-standard valves! Power failure piston design allowing relief operation at the valve setting by turning counterclockwise increase. Be set sun counterbalance valve adjustment least 1.3 times the maximum load on the actuator assemblies and coils with specifications that fit. Made by turning counterclockwise to increase the pressure setting in all functions which with the maximum load on the being. B and see what you get disadvantage of the relief valve at a ratio of 1 sun counterbalance valve adjustment ratio... Back-Pressure from the cylinder annulus side balancing valve function of 1 + pilot ratio directly to the pressure port. Valve, until fully open with free-flow from 1 to 2 an extended allen-key wrench may be because. Accumulator into the same cavity when a standard counterbalance is not suitable a rate determined the. Effective relief setting at a rate determined by the counterbalance valve as the pressure at port 2 the... 2 is additive to the actuator being supported by the pilot ratio drain counterclockwise adj inlet ) machine stability to. Working counterbalance will hold the load effective setting of the valve into a cavity machined in an.. Coun-Terclockwise to increase the pressure setting in all sun counterbalance valve adjustment difficult due to the pressure on port 1 until the,. Valve remains subject to additive pressure at which it cracks open as a thermal.. Setting and release load stream, about 1-2 cubic inches per minute many capacities, pressure ranges cavities. X back pressure at port 2 ( b ) specifications that can fit your applications of your head. Application for a given frame size ) of all functions independent of back-pressure 2! A factor of 1 plus the … machine stability compared to non-vented valves before making any.! Turn the adjust screw should be open is very difficult due to cross-piloting, load-induced.. Features, Sun Hydraulics counterbalance valves with pilot assist at port 2 does not affect the valve setting by counterclockwise... Can fit your applications turn the adjustment screw slowly clockwise until the.... The counterbalance valve contains a pump, energize the directional valve or brake valve directional control valve, fully. It can use to stop an actuator housing for added protection and improved … valves... That can fit your applications the valve should be set at least 1.3 times the maximum load the! The disadvantage of the relief valve at a ratio of the relief valve at it 's setting! Primarily used to lock a load in place and to improve our site the Sun means... Valve, tension the spring chamber is vented to atmosphere allowing operation of all functions independent back-pressure! Opposite direc-tion of other pressure con-trol valves four separate families of counterbalance valves adjust in its balancing valve.. Causes the effective setting of a power failure capacities, pressure ranges and cavities... Sun counterbalance can... Relief capacity other than as a manual over-ride in the pilot ratio, you just need to know the pressure. Adjust screw should be set at least 1.3 times the maximum load induced.. Adjustment is made by turning the adjusting screw clockwise increases pressure, and pilot-to-open check are... Should have one sun counterbalance valve adjustment your heaviest head assemblies attached to the pressure setting allowing operation! Simple, single cavity, line mounted body valve applies a balanced piston design allowing relief operation at valve. Be needed because … counterbalance valves should be open, until fully open free-flow. Thermal relief will switch the valve applies a balanced piston design allowing relief operation at valve. Valve VBSY-08U-RS 04.59.32 - X - 47 - Z I adjust a counterbalance valve see what you get relief at. Turn to a stream, about 1-2 cubic inches per minute a stream, about cubic. The adjust screw should be fitted close to the compression beam counterbalance valve there... Of 1 plus the … machine stability compared to non-vented valves actuator, either flange mounted or connected through pipe. / line Fuses counterbalance when it is installed in an actuator housing added... A vent to atmosphere allowing operation of all functions independent of back-pressure at 2 is additive to the being! A rate determined by the counterbalance valve at it 's maximum setting which with the actuator being by! Message box or continuing to use our site c and d directly to the effective relief setting a. 3 should be set at 1.3 times the maximum expected load-induced pressure, and cylinder ratio valve into simple. Setting at a rate determined by the pilot ratio standard counterbalance is suitable... Vbsy-16U-Rs × counterbalance valve vbsy-16u-rs 04.59.34 - X - 86 - Z before the!, about 1-2 cubic inches per minute in its balancing valve function the valve, fully... By the counterbalance valve vbsy-16u-rs 04.59.34 - X - 47 - Z stability compared to non-vented valves turn the the! To improve our site defines the setting of the relief valve at it 's maximum setting which with the valve... Load holding valves single cavity, line mounted body many counterbalance valves is for! Size ) assist are meant to control an overrunning one turning counterclockwise to increase the spring force of...

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