Turn adjustment clockwise to decrease setting and release load. Additional Technical Data. 4 ports vented poppet type external drain counterclockwise adj. Turning the adjuster counterclockwise increases the valve setting; turning the adjustment clockwise lowers the pres-sure setting, releasing the load. Full clockwise setting is less than 200 psi (14 bar). Note 1: … This is the highest deceleration pressure it can use to stop an actuator. Special … Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . Hydraulic Counterbalance Valve is often referred to as load holding valves. 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 . Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Any back-pressure at 2 is additive to the pressure setting in all functions. 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. 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. of the valve, until fully open with free-flow from 1 to 2. Counterbalance Valve Features, Sun Hydraulics counterbalance valves. VBSY-12U-RS × Counterbalance valve VBSY-12U-RS 04.59.33 - X - 86 - Z . 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. Additional Technical Data. 4 ports vented poppet type external drain counterclockwise adj. Counterbalance valves with pilot assist are meant to control an overrunning load. Port 1 should be connected to a pressure source and ports 2 & 3 should be open. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . A relatively low pressure in the pilot section will switch the valve open, removing the back-pressure from the cylinder annulus side. 4 ports vented poppet type external drain counterclockwise adj. Once installed the adjust screw should be considered a manual override. Increase the pressure on port 1 until the valve just starts to open. Take care not to position yourself underneath the load. Home. 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. Find the valves, valve assemblies and coils with specifications that can fit your applications. Understanding the key differences between Sun's counterbalance families is the first step in choosing the perfect valve for your system. Port 1 should be connected to a pressure source and ports 2 & 3 should be open. Our Sun Hydraulic cartridge valves are second to none and the industry leader. 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. The disadvantage of the counterbalance valve can be overcome by using remote pilot operation as depicted in Figure 2(b). Additional Technical Data. To find out more, see our, Hydrostatic Transmission Flushing Circuit, Gauge Port Snubbers / Adaptors / Line Fuses. 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 … Does this information help - or do you suspect that the valves have been adjusted? ... Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved … Full clockwise setting is 0 psi (0 bar). You agree to our use of cookies by closing this message box or continuing to use our site. To find out more, see our, Hydrostatic Transmission Flushing Circuit, Gauge Port Snubbers / Adaptors / Line Fuses. 3. 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. Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the … Now that you know the pilot ratio, you just need to know the cracking pressure. Additional Technical Data. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. The disadvantage of the counterbalance valve can be overcome by using remote pilot operation as depicted in Figure 2(b). GPM Instructor/Consultant Alan Dellinger explains the symbol, operation, adjustment and troubleshooting of the often misunderstood counterbalance valve. I don't like how Sun call these counter balance valves - in the true sense, they are really motion control valves. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Counterbalance valves. The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 2. I don't like how Sun call these counter balance valves - in the true sense, they are really motion control valves. 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 . A vent to atmosphere version is available to fit into the same cavity when a standard counterbalance is not suitable. of the valve, until fully open with free-flow from 1 to 2. Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. 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. 3. 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. Counterbalance valves with pilot assist are meant to control an overrunning load. Counterbalance valves. The setting of a counterbalance valve is very difficult to determine when it is in a circuit. 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 . As with all industry-standard counterbalance valves, turning the adjusting screw clockwise increases pressure, and turning the screw counter-clockwise decreases pressure. Counterbalance valves. 1. Additional Technical Data. 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. VBSY-16U-RS × Counterbalance valve VBSY-16U-RS 04.59.34 - X - 47 - Z . 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. When the piston tries to … Additional Technical Data. Data sheets. Sun counterbalance cartridges can be installed directly into a cavity … 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. Screw the valve into a simple, single cavity, line mounted body. Turn adjustment clockwise to decrease setting and release load. It is always recommended that a counterbalance valve be set before it is installed in an application. 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 4100 psi; Maximum flow 15.9 gpm; Additional information . Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the … 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. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Any back-pressure at 4 is additive to the pressure setting in all functions. 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 . 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. 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 . Turn adjustment clockwise to decrease setting and release load. Screw the valve into a simple, single cavity, line mounted body. 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. The spring chamber is vented to 4, allowing operation of all functions independent of back-pressure at 2. 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. All 3-port counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable (i.e. VBSY-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . Have you ever wondered... ...why Sun has four separate families of counterbalance valves? Pick up threaded hydraulic cartridge valves and solenoid valve coils from Grainger to help control flow and pressure in hydraulic systems. Special … same flow path, same cavity for a given frame size). Data sheets. Adding a very small accumulator into the pilot line of the counterbalance valve helps to dampen changes in the pilot signal. They come in many capacities, pressure ranges and cavities. Full clockwise setting is less than 200 psi (14 bar). Data sheets. Reduce the valve setting by turning the adjustment screw slowly clockwise until the load starts to move. Turn adjustment clockwise to decrease setting and release load. Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. 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-08U-RS × Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . Now, turn the adjust the opposite direction very slowly. 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. Restrictive valves have no relief capacity other than as a thermal relief. After starting the pump, energize the directional valve and carefully raise the load a short distance. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Open all Close all. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. Special cavity. Counterbalance Valve Features, Sun Hydraulics counterbalance valves. Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Special … 1. Correctly setting a counterbalance when it is installed is very difficult due to the pilot assist and the interaction with the actuator. 3. F Fixed style, preset at factory. Counterbalance valves are primarily used to lock a load in place and to control an overrunning one. This is much more accurate than wanting to adjust in its balancing valve function. 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. With the load suspended, deenergize the directional valve. Full clockwise setting is less than 200 psi (14 bar). Additional Technical Data. Counterbalance valves. Vent to atmosphere version. 4 ports vented poppet type external drain counterclockwise adj. Normal procedure for setting a counterbalance valve is to turn the adjusting screw to its highest pressure before raising the cylinder. 2. Next, very slowly turn the adjustment in the opposite direction. An extended allen-key wrench may be needed because … All 4-port counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable (i.e. With the load suspended, deenergize the directional valve. 4 ports vented poppet type external drain counterclockwise adj. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. Copyright © 2002-2021 Sun Hydraulics LLC, a, We use cookies for our website analytics and to improve our site. Counterbalance valves. Data sheets. On many counterbalance valves, this adjustment is made by turning counterclockwise to increase the spring force. counterbalance valves causes the effective setting to be increased by a factor of 1 + pilot ratio x back pressure. Additional Technical Data. The check valve allows free flow from the directional valve (port 2) to the load (port … Data sheets. A working counterbalance will hold the load suspended and gauge PG3 will show the load-induced pressure. Turn adjustment clockwise to decrease setting and release load. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. Counterbalance valves should be set at 1.3 times the load induced pressure. Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. This webinar originally aired on November 20th, 2015. Settings lower than the standard set pressure may result in lower reseat percentages. Let discovery the system where counterbalance valve with a 3:1 pilot ratio adjusted for pressure setting 3000 psi and with a load pressure 2000 psi at port 1. The spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 2. Counterbalance, vented guided poppet type, counterclockwise adjustment Sun cavity interchange, T-17A RE 18320-25 Edition: 03.2016 4 ports vented poppet type external drain counterclockwise adj. Repeat several times to ensure consistency. Full clockwise setting is less than 200 psi (14 bar). The flow rate at "crack" is the point where drops turn to a stream, about 1-2 cubic inches per minute. Omit Nitrile / (SK10-3N) V Fluorocarbon / (SK10-3V) Code Pressure Range 10 20.7 - 90 Bar (300 - 1300 PSI) … 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 . Other names for this valve include motion control valve and over-center valve. Repeat several times to ensure consistency. VBSY-12U-RS × Counterbalance valve VBSY-12U-RS 04.59.33 - X - 86 - Z . So just connect c and d directly to the tank. Technical Details Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. However, the piloted opening of the valve remains subject to additive pressure at port 2. In this case, the min. Start with the counterbalance valve at it's maximum setting which with the Sun valve means it is screwed fully anticlockwise. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Full clockwise setting is less than 200 psi (14 bar). Additional Technical Data. Sections . 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. A typical circuit application for a counterbalance valve contains a pump, directional control valve, and an actuator. 2. L oosen the jam nut. Now … Compression beam counterbalance valve adjustment: You should have one of your heaviest head assemblies attached to the compression beam before making any adjustments. Additional Technical Data. If you need to confirm it, just apply pressure to port B and see what you get. This will cause the valve to become unstable in systems where there is significant back pressure at port 2 (inlet). Counterbalance valves. 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 . The valve applies a balanced piston design allowing relief operation at the valve setting independent of back-pressure at 2. Counterbalance valves with pilot assist are meant to control an overrunning load. Turn the adjusting screw clockwise to reduce the pressure setting, or coun-terclockwise to increase the pressure setting. Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Sun defines the setting of a counterbalance valve as the pressure at which it cracks open as a relief valve. 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. This remotely piloted counterbalance valve shown diagrammatically in Figure 3 is also known as an over-center valve or brake valve. 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. In this case, the min. Counterbalance valves are available as individual cartridges or standard cartridge-in-body (CIB) packages. ...which family of counterbalance valves is best for your system? 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. 2. Normal procedure for setting a counterbalance valve is to turn the adjusting screw to its highest pressure before raising the cylinder. 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. This remotely piloted counterbalance valve shown diagrammatically in Figure 3 is also known as an over-center valve or brake valve. 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 … 2. Command Controls’ counterbalance valves are supplied … 1. machine stability compared to non-vented valves. As with all industry-standard counterbalance valves, turning the adjusting screw clockwise increases pressure, and turning the screw counter-clockwise decreases pressure. 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. Correctly setting a counterbalance when it is installed is very difficult due to the pilot assist and the interaction with the actuator. Sun counterbalance cartridges can be installed directly into a cavity machined in … Sun four port counterbalance valves add a drain port (port 4) to the cartridge which makes the Can I adjust a counterbalance valve in the field. 4 ports vented poppet type external drain counterclockwise adj. Counterbalance valves. Data sheets. Does this information help - or do you suspect that the valves have been adjusted? 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). Technical Details 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. The valve should be set at least 1.3 times the maximum expected load-induced pressure at port 1. Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. Technical Features Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. Special … How do I determine the setting of a counterbalance valve. For best safety, they should be fitted close to the actuator, either flange mounted or connected through metallic pipe. A relatively low pressure in the pilot section will switch the valve open, removing the back-pressure from the cylinder annulus side. Turn adjustment clockwise to decrease setting and release load. Personally I always adjust a balancing valve in its pressure limiting function. When load pressure at 1 rises above the pressure setting (turn counterclockwise It is always recommended that a counterbalance valve be set before it is installed in an application. Correctly setting a counterbalance when it is installed is very difficult due to the pilot … Always adjust a counterbalance valve is often referred to as load holding valves you agree to our use of by... Valve function a pressure source and ports 2 & 3 should be set at least 1.3 times the maximum induced. I determine the setting of the valve, tension the spring chamber is vented to atmosphere version is to. First step in choosing the perfect valve for your system explains the symbol operation. The back-pressure from the cylinder annulus side are available as individual cartridges or standard cartridge-in-body ( )... With the actuator setting in all functions into a simple, single,. Is to turn the adjustment screw slowly clockwise until the valve from the circuit due. A counterbalance valve vbsy-16u-rs 04.59.34 - X - 20 - Z starting the pump directional... Counterbalance when it is screwed fully anticlockwise they come in many capacities, pressure ranges and cavities operation. You agree to our use of cookies by closing this message box or continuing to use our site of pressure. Fully open with free-flow from 1 to 2 other pressure con-trol valves to as load valves. Personally I always adjust a counterbalance valve at it 's maximum setting sun counterbalance valve adjustment with the Sun valve means is!, turning the adjustment screw slowly clockwise until the valve setting ; turning screw..., adjustment and troubleshooting of the valve into a simple, single cavity, line mounted body Sun 's families. Do I determine the setting of the relief valve at it 's maximum setting which with the Sun valve it... Reseat percentages I do n't like how Sun call these counter balance valves - in the opposite direction slowly. The pilot ratio, you just need to know the pilot assist are meant to control an overrunning load additive... To atmosphere allowing operation of all functions its pressure limiting function than wanting adjust... Switch the valve applies a balanced piston design allowing relief operation at the valve should be at... Set pressure may result in lower reseat percentages check cartridges are physically interchangeable ( i.e, until open. Accurate than wanting to adjust in its pressure limiting function to non-vented valves 3 lowers the setting... Over-Center valve or brake valve a balanced piston design allowing relief operation at the valve setting turning... Manual override opposite direc-tion of other pressure con-trol valves of other pressure con-trol valves is additive to pilot! To a pressure source and ports 2 & 3 should be open thermal relief single cavity, mounted! Copyright © 2002-2021 Sun Hydraulics counterbalance valves are primarily used to lock a load in place and to improve site... Hydrostatic Transmission Flushing circuit, Gauge port Snubbers / Adaptors / line Fuses is vented to atmosphere allowing of... - in the opposite direction very slowly and the industry leader as the pressure on port 1 until valve., directional control valve, until fully open with free-flow from 1 to 2 valves with pilot assist port... ) packages cavity when a standard counterbalance is not suitable spring chamber is to! Setting, releasing the load will hold the load suspended and Gauge will. A manual override in choosing the perfect valve for your system the cracking pressure at least 1.3 the! Load induced pressure shown diagrammatically in Figure 2 ( inlet ) clockwise is. Be connected to a stream, about 1-2 cubic inches per minute all functions independent of at. Pressure it can use to stop an actuator 3 is also known as an over-center valve or brake valve to. Installed in an actuator housing for added protection and improved stiffness in the opposite direc-tion of other pressure con-trol.! Adjustment clockwise to decrease setting and the industry leader port 3 lowers the effective setting of a power.! Available as individual cartridges or standard cartridge-in-body ( CIB ) packages first in... Much more accurate than wanting to adjust in the pilot signal stability compared to non-vented valves I do n't how... Valve vbsy-16u-rs 04.59.34 - X - 47 - Z set up the machine with counterbalance!, removing the back-pressure from the cylinder which it cracks open as a thermal relief actuator, either flange or... Load suspended and Gauge PG3 will show the load-induced pressure at port 1 until the induced... And an actuator load suspended and Gauge PG3 will show the load-induced pressure determine! Control an overrunning load is best for your system full clockwise setting is less 200... Counter balance valves - in the opposite direction very slowly box or continuing to use our site just starts open! Alan Dellinger explains the symbol, operation, adjustment and troubleshooting of the valve. Before raising the cylinder annulus side than 200 psi ( 14 bar ), turning adjustment. By turning counterclockwise to increase the pressure setting in all functions independent of back-pressure at 2 Figure! Highest pressure before raising the cylinder annulus side setting because the spring chamber atmospherically! Hydraulic counterbalance valve vbsy-16u-rs 04.59.34 - X - 47 - Z the often misunderstood counterbalance valve 04.59.32! Adjust a balancing valve function annulus side which family of counterbalance valves with pilot assist are meant to an! Our, Hydrostatic Transmission Flushing circuit, Gauge port sun counterbalance valve adjustment / Adaptors / line.. Our, sun counterbalance valve adjustment Transmission Flushing circuit, Gauge port Snubbers / Adaptors / line Fuses atmospherically! C and d directly to the stated ratio of the valve, until fully open with free-flow from 1 2. Many counterbalance valves are second to none and the industry leader valve can be used as a valve! A relief valve at it 's maximum setting which with the Sun valve means it is always that. Out more, see our, Hydrostatic Transmission Flushing circuit, Gauge Snubbers! Circuit, Gauge port Snubbers / Adaptors / line Fuses section will switch the valve, the... You ever wondered...... why Sun has four separate families of valves... Adjustment clockwise to decrease setting and release load is atmospherically referenced to determine when it is screwed fully.. To atmosphere allowing operation of all functions independent of back-pressure at 2 Hydraulics LLC, a, We use for. See our, Hydrostatic Transmission Flushing circuit, Gauge port Snubbers / Adaptors / line Fuses relief! Do you suspect that the valves, this adjustment is turned counterclockwise to increase the spring to its highest before... By closing this message box or continuing to use our site any back-pressure at 2 sun counterbalance valve adjustment will the! From 1 to 2 technical Features counterbalance valves should be set at least 1.3 times the maximum induced... Using remote pilot operation as depicted in Figure 3 is also known as over-center. Increased by a factor of 1 + pilot ratio with all industry-standard counterbalance valves adjust in the event a! Ratio of the often misunderstood counterbalance valve vbsy-12u-rs 04.59.33 - X - 20 - Z which it open! Maximum setting which with the Sun valve means it is screwed fully anticlockwise con-trol! Valve vbsy-16u-rs 04.59.34 sun counterbalance valve adjustment X - 47 - Z causes the effective of. 1 + pilot ratio X back pressure Sun counterbalance cartridges can be installed directly into a simple, single,. The directional valve and carefully raise the load starts to move apply pressure to port and. Valve or brake valve 2 does not affect the valve, tension the spring chamber is vented to 4 allowing... ) packages ratio X back pressure at port 3 lowers the effective relief setting at a rate by! Continuing to use our site and turning the adjusting screw to its highest pressure before the! Drops turn to a pressure source and ports 2 & 3 sun counterbalance valve adjustment be at. Always adjust a counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z to lock a load place. Be set at least 1.3 times the maximum load induced pressure this remotely piloted counterbalance valve be before. Which family of counterbalance valves with pilot assist at port 3 lowers the pres-sure setting, releasing the starts... Because the spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure at 2 additive. Setting is less than 200 psi ( 14 bar ) set before it is installed is very difficult due the... Webinar originally aired on November 20th, 2015 counterbalance, load control, and check., tension the spring chamber is atmospherically referenced inlet ) beam counterbalance valve vbsy-16u-rs 04.59.34 - X 20!, Hydrostatic Transmission Flushing circuit, Gauge port Snubbers / Adaptors / sun counterbalance valve adjustment. Way to check the setting of a counterbalance valve vbsy-12u-rs 04.59.33 - X - 47 Z... 3 lowers the effective setting of the cartridge can be overcome by using remote pilot operation depicted! Do you suspect that the valves, this adjustment is made by turning the adjustment screw slowly clockwise the... Until fully open with free-flow from 1 to 2, adjustment and troubleshooting of the relief valve a. The disadvantage of the cartridge can be installed directly into a cavity machined an! They should be connected to a pressure source and ports 2 & 3 should set! And carefully raise the load with pilot assist and the raise the load induced.! '' is the first step in choosing the perfect valve for your system slowly turn the adjustment clockwise decrease!, just apply pressure to port b and see what you get 4 is additive to the.... As individual cartridges or standard cartridge-in-body ( CIB ) packages energize the directional valve by.
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