Dwyer 265ER User Manual

Bulletin F-92

SPAN UNIT

CONNECTOR

ZERO UNIT

TORQUE MOTOR

JUNCTION BOX

FEEDBACK LEVER

VENT UNIT

BASE BODY

PILOT VALVE

FEEDBACK SHAFT

CAM

INDICATOR

COVER

INTERNAL LIMIT SWITCH VERSION

STAINLESS STEEL VERSION

STANDARD VERSION

1-49/64

[45.01]

2-35/64

[64.51]

3-5/32

[80.32]

3

-39/64

[

91.82]

5

/16

[

8.00]

4-M8x1.25P

4-51/64

[122.02]

2

-57/64 [73.51]

1

-49/64

[

45.01]

6

1/64

[24.30]

1-3/64

[26.51]

CONDUIT

ENTRY

2-PF (G) 1/2

2-NPT 1/2

OUT 2

PT (NPT) 1/4

1

0-5/16 [261.85]

6-37/64

[167.04]

7-7/8 [200.03]

6

-9/16

[

166.69]

8

-3/4

[225.30]

2

X M8X1.25

1

-31/32

[

50.01]

4-9/16

[115.89]

1-25/32

[45.24]

3-19/32

[91.29]

4

X M8X1.25

2-3/4

[69.85]

6-43/64

[169.47]

6

-9/16

[

166.69]

2X M8X1.25

1-25/32

[

45.24]

4

-41/64

[

117.87]

1

-31/32

[

50.01]

4

X M8X1.25

3-5/8

[92.08]

2

-49/64

[

70.25]

Electro-Pneumatic

POSITIONER

Electro-Pneumatic

POSITIONER

Series 265ER PRECISOR®II Electro-Pneumatic Rotary Positioner

Specifications - Installation and Operating Instructions

The Series 265ER PRECISOR®II Electro-Pneumatic Positioner is used for

rotary operation of pneumatic rotary valve actuators by means of electrical
controller or control systems with an analog output signal of 4 to 20 mA or split
ranges.

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.

• Easy to protect from hunting effect by using output orifice in small size of
actuator.

• 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.

SPECIFICATIONS
Input Signal: 4 to 20 mA DC.
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 female.
Linearity: ±2% of FS.
Hysteresis: 1% of FS.
Sensitivity: ±0.5% of FS.
Repeatability: ±0.5% of FS.
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 to 90°.
Enclosure Rating: IP66.
Operating/Ambient Temperature Limits:

265ER-XX and 265-XXLS: -4 to 158°F (-20 to 70°C);
265ER-XXSS: -40 to 158°F (-40 to 70°C);
265ER-XXFM: 4 to 140°F (-20 to 60°C).

Weight: 6.2 lb (2.8 kg).

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

RINCIPLE OF OPERATION

S
P
A
R

E

INPUT SIGNAL

4~20 mA

OUT2

O

UT1

SUPPLY

OUT2 OUT1

OUT2

OUT1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

15

E

P

ncrease the input current signal to change in lift position of valve. Force exerted

I

y (1) Torque Motor reduces Nozzle Back Pressure with increase in gap between

b

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 rotate.
The movement of (12) Actuator Stem exerted force to the (a) Feedback Spring

hrough Feedback Shaft connections. Then (10) Actuator will stop at the point of

t

orce balance exerted by the input current signal and the feedback spring.

f

BLOCK DIAGRAM OF 265ER

INSTALLATION
Example of attaching to actuator

onnection with Feedback Shaft

C

ttach to the position at which the positioner feedback shaft and the rotary

A

ctuator main shaft are almost concentric (range in which the spring pin of

a

eedback shaft edge enters the hole of fork lever assembly shaft edge).

f

NSTALLATION cont.

I
Cam Attaching Procedure

Use the DA face of cam to turn the actuator main shaft clockwise (viewed from
the positioner front cover side) at the time of input feedback shaft. Use the RA
face to turn it counter-clockwise (reverse action). Correctly attach the cam to the

lange part of feedback shaft. Attach the cam in the procedure of loosening the

f

exagonal nut with flange first, setting the using actuator to the starting position

h

nd then setting the cam reference line and the bearing contact point of span

a
adjusting arm unit to the matching position. Do not apply the supply pressure
when attaching the cam as other wise it is very dangerous. When the positioner
is shipped out of our plant, the cam is tentatively tightened to the 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)].

Attaching Procedure of Opening Degree Indication Plate

Lock the cam and then adjust the zero point and span. Then fix the opening
degree indication plate to the shaft using the M3 screw provided. At the time, set
the opening degree indication plate to the state of attaching reference line.