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:
Compressed Air Transmission and Treatment:Pressure gauges and indicators.
Energy and Efficiency:Output energy available
Air flow rate evaluation:The Ideal Gas Law
Particle degradation:Influence of variables
Multiple use systems:Multiple material handling and Air supply control.
Low pressure and vacuum:Suction nozzles and Feed rate control.
Material property influences:Conveying modes and Dilute phase non-suspension flow.
Hydraulic accessories:Steel tubing.
Process Control Pneumatics:Pneumatic controllers
INTRODUCTION AND OVERVIE:THERMODYNAMICS
INTRODUCTION AND OVERVIE:FLUID MECHANICS
BASICCONCEPTS OF THE RMODYNAMICS:ENERGY AND ENVIRONMENT
PROPERTIES OF PURE SUBSTANCES:INTERNAL ENERGY, ENTHALPY, AND SPECIFIC HEATS OF SOLIDS AND LIQUIDS
GAS MIXTURES AND PSYCHROMETRICS:COMPOSITION OF A GAS MIXTURE: MASS AND MOLE FRACTIONS
SUMMARY OF INTRODUCTION TO FLUID MECHANICS