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Read and understand this manual prior to
operating or servicing this product.
Operating Manual
Pneumatic Stroke Limitation
for
DELTA SW4 / M4
Page 2
Page 3
Content Page
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
UK
8. Spare Parts Lists
Stroke Limitation SW4, M4 - RN 01.054.87
Pneumatic Stroke Limitation
for DELTA SW4 / M4
Operating Manual Rev.0
1
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Page 5
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.
UK
- 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
2
Page 6
3. Mode of Operation
A pneumatic stroke limitation can be used for the valve
series DELTA SW4 / M4.
UK
guide rod
yoke
guide rod
cylinder
air
connection
centering
ring
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.
3
Pneumatic Stroke Limitation
for DELTA SW4 / M4
Operating Manual Rev.0
Page 7
UK
4. Dimensions
D
L in mm D in mm
L
stroke limitation SW4 - 110 196 126
stroke limitation SW4 - 165 218 189
Pneumatic Stroke Limitation
for DELTA SW4 / M4
Operating Manual Rev.0
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.)
4
Page 8
operating cam
hex. nut
centering disk
UK
6. Service Instructions
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.
pneumatic
stroke limitation
centering
ring
actuator
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.
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Pneumatic Stroke Limitation
for DELTA SW4 / M4
Operating Manual Rev.0
Page 9
6. Service Instructions
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.
UK
g. Screw-on the adapter (8).
2
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:
1
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).
Pneumatic Stroke Limitation
for DELTA SW4 / M4
Operating Manual Rev.0
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).
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7. Trouble Shooting
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.
UK
(see service instructions, 5.IV.)
8. Spare Parts Lists
(see annex)
Pneumatic Stroke Limitation
7
for DELTA SW4 / M4
Operating Manual Rev.0
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Your local contact:
APV
Zechenstraße 49
D-59425 Unna
Phone: +49(0) 23 03/ 108-0 Fax: +49(0) 23 03 / 108-210
For more information about our worldwide locations, approvals, certifications, and local representatives, please visit www.apv.com.
Copyright © 2008 SPX Corporation
The information contained in this document, including any specifications and other product details, are subject to change without notice.
While we have taken care to ensure the information is accurate at the time of going to press, we assume no responsibility for errors or
omissions nor for any damages resulting from the use of the information contained herein.
UK
Translation of original manual
rev. 0
BA HUBSWM4002
ID-No.: H204516
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