Issue link: https://onenorgren.uberflip.com/i/508614
Our policy is one of continued research and development. We therefore reserve the right to amend, without notice, the specifications given in this document. © 2015 Norgren, Inc. Simplified Valve Circuit Guide 6 Speed Control on Cylinder Extension, Metered-in. Install the flow control at the blank end of the cylinder with the free flow arrow away from the cylinder. When the valve is actuated, the rod end of the cylinder is exhausted and pressure is metered-in at the blank end. Cylinder speed depends on the load or work done on extension. Although not as stable as metered- out, this method is used in circuits using sequence valves and pressure switches. Speed Control on Cylinder Extension and Retraction—Metered out Install a flow control at each end of the cylinder with the free flow arrow toward the cylinder. When the cylinder is extended or retracted, it will be doing so against a cushion of air being slowly bled to the atmosphere. Extension and retraction speed can be controlled by adjusting the flow control needle valves. When using flow controls, they should be mounted in the cylinder ports or as close to the cylinder as possible. Flow controls MUST be mounted between the cylinder and the valve when using a poppet valve, except for the multi-directional 3-way selector valve (C1012/48) Flow Controls when used with Spool Valves. When flow controls are used with spool valves, the connections and location can be the same as when used with poppet valves. An alternate method of cylinder speed control is to use a needle valve in one or both exhaust ports of the spool valve. This method eliminates the need for a check valve in each flow control. EX CYL. 1 CYL. 2 4-WAY UNACTUATED FLOW CONTROL METERED-IN FREE FLOW IN EX CYL. 1 CYL. 2 4-WAY UNACTUATED FLOW CONTROL METERED-OUT IN 1 2 14 CYLINDER RETRACTED 4-WAY UNACTUATED 4 12 3 5 FLOW CONTROL METERED-OUT 2 14 CYLINDER RETRACTED 4-WAY UNACTUATED 4 12 3 5 NEEDLE VALVES 1