Note: Data may vary by configuration. See CONFIGURATION section.
| Cavity |
11A-3 |
| Rated Flow |
15.85 gpm
60 L/min |
| Maximum Recommended Load Pressure at Maximum Setting |
3100 psi
215 bar |
| Maximum Setting |
4000 psi
280 bar |
| Factory Pressure Settings Established at |
109.84 cu in/min
1.8 LPM |
| Reseat |
85% of setting |
| Check Cracking Pressure |
40 psi
2.8 bar |
| Valve Hex Size |
7/8 in.
22.22 mm |
| Valve Installation Torque |
30 - 37 lbf-ft
40 - 50 Nm |
| Adjustment Screw Internal Hex Size |
5/32 in.
4 mm |
| Locknut Hex Size |
9/16 in.
14.27 mm |
| Locknut Torque |
6 - 7 lbf-ft
9 - 10 Nm |
| Weight |
0.44 lbs (Z=L, LP)
0.2 kg (Z=L, LP) |
Vented, atmospherically referenced counterbalance valve (overcenter valve) is a motion control component which used to control overrunning and load. The check section allows free flow from port 2 to port 1, then holds and locks the load against movement. The direct-acting, pilot-assisted relief valve section controls flow from port 1 to port 2 when pilot pressure is applied. Pilot pressure at port 3 reduces the pressure setting by pilot ratio of counterbalance valve and when it is fully opened, the pressure is relieved from port 1 to port 2. Due to the spring chamber being referenced to atmosphere, the valve setting is insensitive to back pressure at port 2. The pressure required to open the valve follows: Pilot Pressure = [(Relief setting)-(Load Pressure)]/ Pilot Ratio.
- This is a pilot-assisted, poppet type valve.
- Direct acting relief function is able to protect circuit from overloading.
- Setting pressure should be at least 1.3 times the maximum load induced pressure. (We suggest when the maximum setting pressure is 280 bar, the load pressure has to be lower than 215 bar)
- The pilot ratio affects the stability of the mechanical movement, the pilot ratio is low, and the pressure rises steadily.
- Compare with non-vented valves, vented valves require a lower pilot ratio to achieve machine stability.
- The minor internal leakage past the pilot piston purges the air from the pilot line, thus providing improved stability.
- Counterbalance valve is ideal for mounting directly near or in cylinder, hydraulic motor and rotary actuator as protection to increase the safety of the circuit.
- When a valve is set at standard pressure, it is important to note that the reseat percentage should not exceed 85% of the set pressure, or it will lower the reseat performance.
- Internal components are made of high-quality alloy steel, processed heat treatment and precision machined to achieve excellent wear resistance, low leakage, smooth movement and long service life.
- External components are WINNERcoat® Zinc-Nickel Plating for 1000 hours salt spray test according to DIN EN ISO 9227. Also, some ordering code with letter “P” at the end is stainless steel external components, see configuration for more details. The ordering code with letter “S” at the end is all components of cartridge valve are made of stainless steel for special requirements such as deep sea, marine, or water based hydraulic.
- Winner guarantees that all products performance a 100% functional test before shipment.
