Dwyer 165EL User Manual

Bulletin F-90

SPAN UNIT

TORQUE MORTOR

ZERO UNIT

BASE BODY

PILOT VALVE

FEEDBACK SHAFT

FEEDBACK LEVER

VENT UNIT

BASE COVER

JUNCTION BOX

S
P
A

R
E

3

0

2

0

4

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

INPUT SIGNAL

4 ~ 20 mA

E

OUT1

OUT2

SUPPLY

6

-9/16

[

166.69]

6

-43/64

[

169.47]
2

X M8X1.25

1-25/32

[45.24]

4

-41/64

[

117.87]

2-49/64

[70.25]

1

-31/32

[

50.01]

4

X M8X1.25

STAINLESS STEEL VERSION

STANDARD VERSION

8-3/4

[225.30]

6-9/16

[166.69]

2X M8X1.25

4-9/16

[115.89]

1-25/32
[45.24]

1

-31/32

[

50.01]

4

X M8X1.25

2-3/4

[69.85]

3-19/32

[91.29]

3

-5/8

[

92.08]

Electro-Pneumatic

POSITIONER

Electro-Pneumatic

POSITIONER

Series 165EL PRECISOR®II Electro-Pneumatic Linear Positioner

Specifications - Installation and Operating Instructions

The Series 165EL PRECISOR®II Electro-Pneumatic Positioner is used for lin-

ar operation of pneumatic linear valve actuators by means of electrical controller

e

r control systems with an analog output signal of 4 to 20 mA or split ranges.

o

FEATURES

• There is no resonance in the range of 5 to 200 Hz.

• 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 feedback connection.

• Fast and accurate response.

• Low air consumption.

• Designed as multi-port type for air tubing.

• Easy to install air tubing connection in any direction.

• Designed as block build structure for maintenance and repair.

STRUCTURE

PROXIMITY DIV., DWYER INSTRUMENTS, INC.

P.O. BOX 358 • MICHIGAN CITY, INDIANA 46360 U.S. A.

low Capacity: 28 scfm (80 LPM) at

PECIFICATIONS

S

nput Signal: 4 to 20 mA DC.

I
Input Impedance: 250 ±15 Ω.
Material: Aluminum diecasting.
Air Supply: 20 to 101 psig (1.4 to 7.0

bar).

Air Supply Connection: 1/4˝ NPT.
Gage Connection: 1/8˝ NPT.
Electrical Connection: Screw

Terminal.

Conduit Connection: 1/2˝ NPT.
Linearity: ±0.2% of FS.
Hysteresis: 1% of FS.
Sensitivity: ±0.2% of FS.

F

0 psig (1.4 bar) supply.

2

Stroke: 0.5 to 6˝ (10 to 150 mm).
Enclosure Rating: IP66.
Operating Temperature:

165EL: -4 to 158°F (-20 to 70°C);
165EL-SS: -40 to 158°F (-40 to
70°C);
165EL-FM: -4 to 140°F (-20 to
60°C).

Weight: 165EL: 6.1 lb (2.7 kg);
165EL-SS: 12.6 lb (5.7 kg).
Agency Approvals: CE (165EL
only), FM (165EL only).

Repeatability: ±0.5% of FS.
Air Consumption: 0.10 scfm (3 LPM)

at 20 psig (1.4 bar) supply.

PRINCIPLE OF OPERATION

Increase the input current signal to change lift position of valve. Force exerted by
(1) Torque Motor reduces Nozzle Back Pressure with increase in gap between (2)
Flapper and (3) Nozzle. Then (5) Spool moves upward and the (7) Seat opens
simultaneously. Air pressure of OUT1 pipe is discharged to (10) Actuator. As pres­sure in the actuator chamber goes up, (12) Actuator Stem starts to move. The
movement of (12) Actuator Stem exerts 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.

Phone: [phone] www.dwyer-inst.com
Fax: [phone] e-mail: [e-mail]

BLOCK DIAGRAM OF 165EL

NSTALLATION

I

xample of attaching to actuator

E

INSTALLATION cont.
Direct Action & Reverse Action

Attach the cam in the procedure of loosening the hexagonal nut with flange first,

etting the actuator to the starting position and then setting the cam reference line

s

nd the bearing contact point of span adjusting arm unit to the same position. Do

a

ot apply the supply pressure when attaching the cam as otherwise it is very dan-

n

erous. When the positioner is shipped out, the cam is tentatively tightened to the

g
shaft. Be sure to firmly lock the cam to the lock nut [tightening torque 17.7 to 22.1
in-lbs (2.0 to 2.5 NM)].

ase of directly attaching to diaphragm valve.

C

Connection with Feedback Lever

Attach in the position that the valve stem and lever form a right angle when the
input signal is 50%. Attach to the position that the runout angle is within the range
of 10 to 30°.

Example 1.

Example 2.

Case of using a bracket.

AIR PIPING CONNECTION

Fully purge the pipe to remove foreign matter. Use a clean supply air fully
removed of humidity and dust. Use a Series AFR filter regulator to keep supply
air pressure constant.