SPX DELTA SW4 Manuel utilisateur

Read and understand this manual prior to

operating or servicing this product.

Operating Manual

Pneumatic Stroke Limitation

for

DELTA SW4 / M4

1. General Terms 2

2. Safety Instructions 2

3. Mode of Operation 3

4. Dimensions 4

5. Technical Data 4

6. Service Instructions 5 - 6

7. Trouble Shooting 7

8. Spare Parts Lists

Stroke Limitation SW4, M4 - RN 01.054.87

Content Page

Pneumatic Stroke Limitation

for DELTA SW4 / M4

Operating Manual Rev.0

1. General Terms

This operating manual has to be read carefully and must be

observed by the competent operating and maintenance personnel.

We have to point out that we will not accept any liability for damage

or malfunctions resulting from the non-compliance with this

operating manual.

Descriptions and data given herein are subject to technical

changes.

2. Safety Instructions

DANGER!

- The technical safety symbol draws your attention to important

directions of operating safety.You will find it wherever the activities

described are bearing risks of personal injury.

- Electric and pneumatic connections must be separated.

- Do not reach into the open valve.

- Risk of injury by suddenly operating valve. In dismantled state

there is the risk of bruising at movable parts of the valve.

- Observe service instructions to ensure a safe maintenance of

the valve.

- The welded actuator is under spring load, do not open it by force.

Pneumatic Stroke Limitation

for DELTA SW4 / M4

Operating Manual Rev.0

3. Mode of Operation

yoke

guide rod

centering

ring

air

connection

cylinder

A pneumatic stroke limitation can be used for the valve

series DELTA SW4 / M4.

The valves SW4 / M4 with pneumatic stroke limitation must

be designed in the

version NC = normally closed.

The valve design NO = normally open is not suited for the

pneumatic stroke limitation.

The pneumatic stroke limitation allows a continuous adjustment

of a total valve stroke of 0 - 100 %.

Equipped with the pneumatic stroke limitation, the valve seat

can take three different positions:

open, throttled and closed.

The required opening cross section is adopted by an

adjusting screw.

A separate control is needed to operate the pneumatic

stroke limitation.

The inner parts of the cylinder are maintenance-free.

Pneumatic Stroke Limitation

for DELTA SW4 / M4

Operating Manual Rev.0

4. Dimensions

L in mm D in mm

stroke limitation SW4 - 110 196 126

stroke limitation SW4 - 165 218 189

5. Technical Data

cylinder: 1.4301

max. stroke: 28 mm

throttle adjustment: continuous from 0 to 100 %

air connection (for hose): 6x1 mm

max. control air pressure: 8 bar

min. control air pressure: 6 bar

(Use dry and clean control air, only.)

Pneumatic Stroke Limitation

for DELTA SW4 / M4

Operating Manual Rev.0

I. Modifications for valve ranges SW4 / M4

a. Dismantle the SW4 or M4 valve insert from the valve housing

according to the instructions given in the respective operating

manual.

b. Replace the standard SW4 or M4 guide rod against the extended

guide rod to install the stroke limitation.

II. Replacement of guide rod

a. Remove the operating cam.

b. Unscrew hexagon nut by holding up the centering disk.

Remove centering disk.

c. Detach valve shaft from actuator.

d. Clamp valve shaft into a vice.

Attention: Do not damage the valve shaft.

(Use protective bracket.)

e. Take the centering disk and a wrench, size 17 , to remove

the guide rod from the valve shaft.

f. Put the extended guide rod in the shaft.

Tightening torque: 40 Nm

g. Push the valve shaft through the yoke and the actuator.

III. Assembly of stroke limitation

a. Slide the centering ring on the guide rod.

b. Fasten the pneumatic stroke limitation with yoke by

the 4 hex. screws on the actuator.

c. Attach the centering disk. Screw-on the hex. nut.

Hold up the centering disk for this purpose and fasten the

hex. nut with a tightening torque of 40 Nm.

d. Place the operating cam and tighten it.

e. Secure the valve position indicator.

Install the Control Unit.

6. Service Instructions

operating cam

centering disk

hex. nut

centering

ring

pneumatic

stroke limitation

actuator

Pneumatic Stroke Limitation

for DELTA SW4 / M4

Operating Manual Rev.0

IV. Adjustment of stroke limitation

a. Remove the Control Unit or valve position indicator.

b. Remove the adapter (8).

c. Release the nut (10) by a spanner.

Hold up the adjusting screw for this purpose.

d. Set the adjusting screw accordingly.

turn right : to increase stroke

turn left : to reduce stroke

e. Control the stroke limitation with air to check and to measure

the stroke.

f. Fasten the nut (10). Hold up the adjusting screw for this purpose.

g. Screw-on the adapter (8).

h. Attach the relevant valve position feedback.

V. Control of stroke limitation

To open a sectional stroke in the valve, observe the

following aspects for the control of the valve:

6. Service Instructions

valve position step of control

valve from open position to sectional stroke

open Control actuator (1)

sectional stroke 1. Leave actuator (1) controlled.

2. Control pneumatic stroke limitation (2).

3. Vent actuator (1).

closed Vent pneumatic stroke limitation (2).

valve from closed position to sectional stroke

closed Main cylinder (1) and stroke limitation (2)

depressurized.

sectional stroke Control pneumatic stroke limitation (2).

Pneumatic Stroke Limitation

for DELTA SW4 / M4

Operating Manual Rev.0

The item numbers refer to the spare parts list RN: 01.054.87.

Air leakage at the

seal screw (3) : Replace seal screw (3).

Permanent

air leakage at the

nut (10) : Replace stroke limitation (1).

Flow quantity

too small or too high : Adjust sectional stroke of valve.

(see service instructions, 5.IV.)

8. Spare Parts Lists

(see annex)

7. Trouble Shooting

Pneumatic Stroke Limitation

for DELTA SW4 / M4

Operating Manual Rev.0

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