Dwyer 165NL - Manual

The Series 165NL PRECISOR ® Pneumatic Positioner, is used for pneumatic
valve actuators by means of pneumatic controller or control systems with an out-
put signal of 3 to 15 psi or split ranges.
FEATURES
• Perform 1/2 Split Control without any other substitutes.
• Easy to adjust zero and span.
• Easy to convert from Reverse Action to Direct Action or vice versa.
• Easy to protect from hunting effect by using output orifice in small size actuator.
• Easy Feedback Connection.
• Fast and accurate response.
• Low air consumption.
• Easy installation.
• Designed as block build structure for maintenance and repair.
• Proved the reliability through over 500,000 times of Repeat Test and Vibration
Test.
• Superior anti-corrosion by special surface treating.
OPERATING PRINCIPLES
Increase the input signal to change lift position of valve. Force exerted by (1)
Torque Motor reduces Nozzle Back Pressure with increase in gap between
between (2) Flapper and (3) Nozzle. Then (5) Spool moves upward and the seat
opens simultaneously. Air pressure of OUT1 pipe is discharged to (10) Actuator.
As pressure in the actuator chamber goes up, (12) Actuator Stem start to move.
The movement of (12) Actuator Stem exerted force to the (a) Feedback Spring
through Feedback Shaft connections. Then (10) Actuator will stop at the point of
force balance exerted by the input current signal and the feedback spring.
SPECIFICATIONS
Input Signal: 3 to 15 psi (0.2 to 1 bar).
Material: Aluminum diecasting.
Air Supply: 20 to 100 psig (1.4 to 6.9 bar).
Air Supply Connection: 1/4˝ NPT.
Gage Connection: 1/8˝ NPT.
Linearity: ±0.2% of F.S.
Hysteresis: 1% of F.S.
Sensitivity: ±0.2% of F.S.
Repeatability: ±0.5% of F.S.
Air Consumption: 0.10 scfm (3 LPM) at 20 psig (1.4 bar) supply.
Flow Capacity: 28 scfm (80 LPM) at 20 psig (1.4 bar) supply.
Stroke: 0.5 to 6˝ (10 to150 mm).
Enclosure Rating: IP66.
Operating Temperature: -4 to 158°F (-20 to 70°C).
Weight: 3.1 lb (1.7 kg).
PROXIMITY DIV., DWYER INSTRUMENTS, INC.
P.O. BOX 358 • MICHIGAN CITY, INDIANA 46360 U.S.A.
Phone: 219/879-8000 www.dwyer-inst.com
Fax: 219/872-9057 e-mail: [email protected]
Series 165NL PRECISOR ® II Pneumatic Linear Positioner
Specifications - Installation and Operating Instructions
Bulletin F-91
1-31/32
[50.01]
2x M8X1.25P
4-41/64
[117.87]
1-25/32
[45.24]
1-3/64
[26.59]
4x M8X1.25P
1-25/32
[45.24]
3-5/8
[92.08]
6-9/16
[166.69]
4-13/16
[122.24]
1/4
[6.35]
8-27/32
[224.63]
5-7/32
[132.56]
2-49/64
[70.25]