Special Purpose Valve section of CV9 Catalog0 pages

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Special Purpose Valves

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One-Shot (Pulse)

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This valve provides a momentary (pulse) output at its cylinder port when pressure is applied at its inlet. No additional flow is

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possible until pressure at the inlet is removed, reset time allowed, and pressure reapplied. Reset time is slightly longer than output

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pulse time.

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OS-1

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Operation

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When the incoming signal

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is applied to the IN port, the

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spool is immediately shifted,

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allowing the pressure to and

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through the CYL port,

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becoming the output signal.

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Pressure then bleeds across an

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orifice through the piston head. When pres-

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sure is equal on both sides of the piston head there is a

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force unbalance on the spool. This force unbalance returns the

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spool to its original position. In this position the incoming signal

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is blocked and the CYL is connected to the EXH, in turn venting

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the output signal.

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Before the valve can produce another output signal it must

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be reset. This is accomplished when the input signal is removed

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from the IN port and the pressure behind the piston bleeds back

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through the orifice and drops to zero psi.This also self cleans the

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orifice every cycle. The next incoming signal can then produce

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another output signal.

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NOTE! The incoming signal MUST be of sufficient pressure

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and volume to shift the spool before bleeding across the orifice

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and balancing out.

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Sizing

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Model Number	Approximate Pulse Time, Seconds @80 psi	Approximate ResetTime, Seconds @80 psi	Port Size	Weight Oz.
OS-1	3/4	1	1/8 NPT	3.1
OS-3	1-1/2	2	1/8 NPT	4.8

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Spool action can be

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observed for trouble

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shooting circuit.

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Operating pressure:

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45 to 150 psi.

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Operating temperature:

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0° to + 180°F.

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No springs.

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Self-cleaning orifice.

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Features

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• One moving part.

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• Buna-N seals.

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• Pulse time preset

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at factory.

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(See Model Chart)

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• Shorter pulse can be

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field set with ordinary

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sewing needle.

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• Can be cleaned or

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repaired without

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removing from installation.

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Applications

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• Signal Conversion-Pulse, to convert a constant or maintained

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signal from a limit valve or other source to a pulse or momentary

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signal for a double piloted valve or other device. This allows the

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double piloted valve to be shifted back even though the originat-

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ing limit valve is still held open. See sequencing circuit on page

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13.4.

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• Single Cycle, to convert a signal from a hand or foot control

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to a pulse signal. This allows only one cycle of the circuit even

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if the operator holds the starting device on. The operator must

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release the starting device to reset the one-shot/pulse valve and

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then reactuate to achieve the next cycle. See pressure sensing

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circuit on page 13.4.

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• Open End Blast, to provide a pulse of air through a nozzle or

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tube for automatic part blow off or chip removal.

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Symbol

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IN	V	EXH
		I
		CYL

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Dimensions

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Model No. OS-1 & OS-3 1/8 NPT Ports

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Materials:

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Body, Aluminum, Unanodized

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Cap, Brass

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Spool, Aluminum

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1/8 NPT Ports -

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1.25

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.75

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2 Mounting Holes

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for #10 Screws

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.97-

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S3

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.28

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-^.44

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*78-»

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- 1.56 -<•

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■ 2.31 OS-1 —»■

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h- 3.81 OS-3

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I

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7

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.16

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13.1

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Specifications subject to change without notice or incurring obligation

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10-26-04

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