Item # PT41B

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  • $980.71
  • $980.71
  • $980.71
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Highlights:

The PT timer is an adjustable precise time delay pneumatic device. The timer is available with an on delay (NC), or an off delay (NO) output. The timer has 1/8 inch NPT ports.

The PT series timer combines a pneumatic timing mechanism with a floating spool valve assembly to provide a wide range of adjustable time control for fluid power systems. The timing assembly, which operates independently of the control pressure, is available in nine different ranges from one tenth of a second to 60 minutes, adjustable by means of a time-calibrated dial. Timing action is initiated by a motor diaphragm operated by a control pressure of from 5 to 140 PSIG.

The timer is equipped with a multi purpose 3 way output valve allowing it to be used as normally open, normally closed or as a diverter.

The PT is designed for panel or surface mounting. Panel mounted versions include a 3 13/16 inch square bezel while surface mounted units are equipped with a bracket for vertical mounting. If required, The PT can be specially calibrated for mounting horizontally.

Off Delay Timer Operation Applying pilot pressure of at least 100ms in duration to the control port shifts the valve. When the pilot pressure is removed, the timing sequence begins. After the timer reaches its set time, the valve switches off. Re-applying the pilot pressure resets the timer and valve.

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Description
Position Vertical Position
Mount Type Standard Vertical Surface Mount
Timing Range 0.5 to 5 sec.
Operating Pressure Range 5 to 140 psi
Connections 1/8″ NPT ports
Control Pressure 5 to 140 psi
Media Filtered air or non-aggressive gas, non-lubricated.
Output Valve Cv – 0.25

Flow at 100 PSI – 9 CFM

Multi purpose 3 way spool

Dial Indicator Displays set time
Timing Star Off Delay – Removal of pilot pressure to control port.
Reset Off Delay – Application of pilot pressure to control port.
Reset Time 60 ms at 50 psi
Repeatability Up to 200 sec. – ± 5%

Over 200 sec. – ± 10%

Time Setting Via dial

Accuracy ± 10% of full scale

Operation Timing cycle uses atmospheric pressure.
Materials Diaphragms – Buna N

Zamak Housing

Polycarbonate knob

Aluminum Valve with stainless spool

Operating Ambient -30 to 70 ºC

-20 to 165 ºF

Height 5 1/4 in.
Width 2 1/2 in.
Depth 2 1/2 in.
Mounting Surface mounted
Drilling Plan (Panel Mount) 3 3/16 in. dia. Hole
Port Identification 2 – Valve output

1 – System air supply

3 – Exhaust

C – Control Input Signal

Options Stainless Steel Fitting Mounted

Dial Stop

Tamper Proof Cover

Power Connections For installations requiring larger output valves, use the standard timer and connect a pneumatically operated single air piloted 3 way or 4 way valve of the size required to the timer output. Contact factory with size requirements.
Typical Circuits See typical timing circuit diagrams at the end of the timer catalog section for help in constructing pneumatic timer circuits.
Additional information
Weight 3 lbs
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