Sequence valves
The sequence valve is a close relative of the pressure relief valve and is used where a set of operations are to be controlled in a pres sure related sequence. Figure 4.27 shows a typical example where a workpiece is pushed into position by cylinder 1 and clamped by cylinder 2.
Sequence valve V2 is connected to the extend line of cylinder 1. When this cylinder is moving the workpiece, the line pressure is low, but rises once the workpiece hits the end stop. The sequence valve opens once its inlet pressure rises above a preset level.
Cylinder 2 then operates to clamp the workpiece. A check valve across V2 allows both cylinders to retract together.
Incoming search terms:
Related posts:
Concepts for estimating pumping energy costs:Flow regulated by throttling
System selection considerations:System selection considerations
Operating problems:System related
Hydraulic accessories:Flexible hoses.
Fine material:Procedure and Operating point
Control components in a hydraulic system:Pressure control valves
Hydraulic accessories:Beta ratio
Control components in a hydraulic system:Manifolds
Pneumatic piping, hoses and connections.
Air treatment:Stages of air treatment,Filters,Air dryers and Lubricators.
Compressor types:Piston compressors,Screw compressors,Rotary compressors and Dynamic compressors.
Air Compressors, Air Treatment and Pressure Regulation:relief valves
Safety, Fault-Finding and Maintenance:computer simulation
INTRODUCTION AND OVERVIE:FLUID MECHANICS
THE SECOND LA W OF THERMODYNAMICS:THE CARNOT REFRIGERATOR AND HEAT PUMP