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.
Related posts:
Financial justification:Life cycle cost (LCC)
Concepts for estimating pumping energy costs:Systems with static head
Engineering Data:Graphical symbols for pneumatic systems and components
Applications on pneumatic:Industrial tools
Moisture and condensation:Humidity and Specific humidity
Troubleshooting and material flow problems:Pipeline blockage and On commissioning.
Control components in a hydraulic system:Flovvrneters.
COMPRESSORS:Axial Compressors
COMPRESSORS:Helical Lobe Compressors
Definition of terms: Mass and force ,Pressure ,Work, energy and power and Torque.
Hydraulic and Pneumatic Accessories:Hydraulic coolers and Heat exchangers
Hydraulic and Pneumatic Accessories:Hydraulic and Pneumatic fuses
BASICCONCEPTS OF THE RMODYNAMICS:PROPERTIES OF A SYSTEM
SUMMARY OF ENTROPY
NATURAL CONVECTION:NATURAL CONVECTION INSIDE ENCLOSURES