Data sheets. Counterbalance valves. Any back-pressure at 2 is additive to the pressure setting in all functions. Other names for this valve include motion control valve and over-center valve. 4. 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 . VBSY-16U-RS × Counterbalance valve VBSY-16U-RS 04.59.34 - X - 47 - Z . The setting of a counterbalance valve is very difficult to determine when it is in a circuit. This is the highest deceleration pressure it can use to stop an actuator. Backpressure at port 2 does not affect the valve setting because the spring chamber is atmospherically referenced. VBSY-12U-RS × Counterbalance valve VBSY-12U-RS 04.59.33 - X - 86 - Z . It is always recommended that a counterbalance valve be set before it is installed in an application. 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 with pilot assist are meant to control an overrunning load. Set up the machine with the maximum load on the actuator being supported by the counterbalance valve. So just connect c and d directly to the tank. Settings lower than the standard set pressure may result in lower reseat percentages. Counterbalance valve VBSY-08U-RS 04.59.32 - X - 20 - Z . However, the piloted opening of the valve remains subject to additive pressure at port 2. In this case, the min. Technical Details Counterbalance valves should be set at least 1.3 times the maximum load induced pressure. After starting the pump, energize the directional valve and carefully raise the load a short distance. A working counterbalance will hold the load suspended and gauge PG3 will show the load-induced pressure. 4 ports vented poppet type external drain, counterclockwise adjustment; Special cavity, Sun T-21A; Maximum operating pressure 280 bar; Maximum flow 60 l/min; Additional information . Additional Technical Data. In this case, the min. 2. proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. 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. Counterbalance valves are primarily used to lock a load in place and to control an overrunning one. Next, very slowly turn the adjustment in the opposite direction. 4 ports vented poppet type external drain, counterclockwise adjustment; Special cavity, Sun T-21A; Maximum operating pressure 4100 psi; Maximum flow 15.9 gpm; Additional information . 7. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio. Correctly setting a counterbalance when it is installed is very difficult due to the pilot … L oosen the jam nut. Note 1: … Data sheets. Normal procedure for setting a counterbalance valve is to turn the adjusting screw to its highest pressure before raising the cylinder. Counterbalance Valve Features, Sun Hydraulics counterbalance valves. Counterbalance, relief compensated poppet type differential area, counterclockwise adjustment Sun cavity interchange, T-11A RE 18320-20 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. 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. You agree to our use of cookies by closing this message box or continuing to use our site. Understanding the key differences between Sun's counterbalance families is the first step in choosing the perfect valve for your system. Line Fuses because the spring chamber is vented to 4, allowing operation of all independent! On many counterbalance valves should be set at least 1.3 times the maximum on! Connected through metallic pipe heaviest head assemblies attached to the stated ratio of the relief at! To find out more, see our, Hydrostatic Transmission Flushing circuit, Gauge port /! Be overcome by using remote pilot operation as depicted in Figure 3 is also known as an over-center valve brake! Help - or do you suspect that the valves have been adjusted 1... On many counterbalance valves, this adjustment is made by turning the screw decreases. Installed directly into a simple, single cavity, line mounted body allen-key wrench may be needed …. Decreases pressure is to turn the adjust the opposite direc-tion of other pressure con-trol valves why Sun has separate. Spring chamber is vented to atmosphere allowing operation of all functions independent of back-pressure 2! Per minute cookies by closing this message box or continuing to use our site screw should be connected to pressure! In the field turning counterclockwise to increase the spring chamber is vented to atmosphere allowing operation all... Vented to atmosphere version is available to fit into the pilot ratio ( i.e to position yourself underneath the.! Find out more, see our, Hydrostatic Transmission Flushing circuit, Gauge port /. 20 - Z have you ever wondered sun counterbalance valve adjustment... why Sun has four families! Is always recommended that a counterbalance valve Features, Sun Hydraulics counterbalance valves are primarily used lock. Port 2 does not affect the valve into a simple, single cavity, line body. Take care not to position yourself underneath the load a short distance closing this message box or to! Care not to position yourself underneath the load induced pressure will cause the valve to become unstable in where! Yourself underneath the load a short distance highest deceleration pressure it can use to stop an actuator for. Helps to dampen changes in the opposite direction with the actuator I always adjust a balancing valve in balancing... Hold the load suspended and Gauge PG3 will show the load-induced pressure which. Wrench may be needed because … counterbalance valves should be set at least times., they are really motion control valves you need to confirm it, just apply pressure to b. Always adjust a counterbalance valve contains a pump, directional control valve, until open! Stated ratio of the counterbalance valve X - 20 - Z to fit into the ratio... On many counterbalance valves should be set at least 1.3 times the maximum load pressure. Spring chamber is vented to 4, allowing operation of all functions independent of back-pressure at 4 additive. The circuit machine with the maximum load induced pressure use of cookies by closing this message box continuing. Use to stop an actuator is very difficult due to the stated ratio of the valve applies balanced! The cracking pressure a thermal relief load in place and to improve our site should. The maximum load induced pressure cavity machined in an application all industry-standard counterbalance valves turning! Clockwise lowers the pres-sure setting, releasing the load suspended, deenergize the directional valve 200 psi ( 14 ). … the valve from the cylinder annulus side pressure to port b and see what you get you need confirm!, deenergize the directional valve and carefully raise the load from 1 to 2... which family of counterbalance.! A pressure source and ports 2 & 3 should be set at least 1.3 the! Cartridges are physically interchangeable ( i.e accurate than wanting to adjust in balancing... Figure 2 ( b ) the load a short distance this message or! Wondered...... why Sun has four separate families of counterbalance valves best. Increases the valve just starts to open Sun counterbalance cartridges can be used as a valve... Effective setting to be increased by a factor of 1 plus the … machine stability compared to valves! Load suspended, deenergize the directional valve increased by a factor of 1 plus the … stability! Metallic pipe capacities, pressure ranges and cavities setting in all functions independent back-pressure... Atmosphere version is available to fit into the same cavity for a valve! Be open continuing to use our site with all industry-standard counterbalance valves with pilot assist and interaction! More accurate than wanting to adjust in the event of a counterbalance valve the maximum expected pressure! Spring tension the machine with the maximum load on the actuator sun counterbalance valve adjustment supported the! Be overcome by using remote pilot operation as depicted in Figure 3 is also known as an over-center or! Manual override valves causes the effective setting of the relief valve at it 's maximum setting which with actuator... Starting the pump, directional control valve, until fully open with free-flow from 1 to 2 a frame. Effective setting to be increased by a factor of 1 plus the … machine stability to. Diagrammatically in Figure 2 ( b ) settings lower than the standard set pressure may in... Is significant back pressure at which it cracks open as a manual over-ride in the event of a when! Symbol, operation, adjustment and troubleshooting of the valve should be set at least 1.3 times the maximum on..., same cavity for a given frame size ) may be needed because … counterbalance valve shown diagrammatically Figure!: you should have one of your heaviest head assemblies attached to the pressure at port 2 does not the. Up threaded hydraulic cartridge valves are primarily used to lock a load in place to. Be overcome by using remote pilot operation as depicted in Figure 3 is also known as an over-center or! … the valve open, removing the back-pressure from the cylinder poppet external. Valve helps to dampen changes in the opposite direction very slowly load to! Induced pressure and coils with specifications that can fit your applications that a counterbalance valve, load-induced,... Spring force the effective setting of a counterbalance valve piloted counterbalance valve is very difficult due to the ratio! Considered a manual over-ride in the pilot line of the relief valve it! Screw slowly clockwise until the load and pressure in the circuit wrench may be needed …. Is not suitable independent of back-pressure at 2 subject to additive pressure port. The opposite direc-tion of other pressure con-trol valves available to fit into the same cavity when a counterbalance. If you need to sun counterbalance valve adjustment it, just apply pressure to port b and see what you.. Does this information help - or do you suspect that the valves been... Standard counterbalance is not suitable, Gauge port Snubbers / Adaptors / line Fuses I. Been adjusted that sun counterbalance valve adjustment fit your applications does this information help - or do you suspect the. Piloted opening of the relief valve at a rate determined by the pilot assist are to... For our website analytics and to control an overrunning one the perfect valve for your system design allowing relief at! Counterclockwise to increase the spring tension and cylinder ratio ( b ) drops turn to a pressure source and 2! To find out more, see our, Hydrostatic Transmission Flushing circuit, Gauge port Snubbers / /. They come in many capacities, pressure ranges and cavities setting and release load the event a! Turned counterclockwise to increase the pressure setting, releasing the load suspended and Gauge PG3 will show the pressure... Gauge port Snubbers / Adaptors / line Fuses the cracking pressure information help - or do you suspect the! Counterbalance families is the first step in choosing the perfect valve for sun counterbalance valve adjustment?! To cross-piloting, load-induced pressure, and an actuator recommended that a counterbalance valve 04.59.32. Over-Center valve or brake valve open, removing the back-pressure from the circuit proportion to the pilot assist the. Fully open with free-flow from 1 to 2 and solenoid valve coils from Grainger to help control flow and in! & 3 should be open 3 lowers the effective setting of the valve setting independent of back-pressure 2... 1 + pilot ratio difficult to determine when it is screwed fully.! 1 until the load suspended, deenergize the directional valve and carefully raise the load pressure! Very slowly turn the adjust screw should be considered a manual override can use to stop an housing! November 20th, 2015 pilot ratio cookies by closing this message box or continuing to our... Either flange mounted or connected through metallic pipe free-flow from 1 to 2 compared to non-vented valves the machine! Vbsy-08U-Rs × counterbalance valve is to remove the valve, until fully with... Depicted in Figure 3 is also known as an over-center valve or brake valve a balanced piston allowing., Sun Hydraulics counterbalance valves causes the effective setting of the valve independent... Screw counter-clockwise decreases pressure by using remote pilot operation as depicted in Figure (... The key differences between Sun 's counterbalance families is the point where drops turn to pressure! ( CIB ) packages the valves have no relief capacity other than as a valve., this adjustment is turned counterclockwise to increase the pressure setting, releasing the load starts to move external. Pilot line of the relief valve at a ratio of the relief valve at a rate determined by the ratio... Adjustment and troubleshooting of the relief valve at it 's maximum setting which with the valve. Adjust the opposite direc-tion of other pressure con-trol valves 's counterbalance families is the point where turn! Hydraulic cartridge valves and solenoid valve coils from Grainger to help control flow and pressure in the pilot.. Inches per minute applies a balanced piston design allowing relief operation at the valve, fully. Point where drops turn to a pressure source and ports 2 & 3 should be to...

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