Control valves
Electric actuators
Maximum differential pressures (p) bar for SPIRA-TROL valves
(KE, LE, KEA and LEA with PTFE or graphite stem seal)
Notes:
1) Refer to the valve TI for maximum valve operating pressures.
2) The actuator differential pressures shown in the table below also apply to the spring reserve versions.
DN15
DN20 DN25 DN32 DN40
Valve size
Valve travel
Kvs value
EL3500 series
actuator and
derivatives
Modulating duty*
(metal-to-metal)
Class IV shut-off
(metal-to-metal)
Class VI shut-off
(soft seating)
20 mm
DN50
36
Graphite
1.2
-
1.1
PTFE
24.8
9.8
24.4
4
Graphite
9.5
-
9.5
PTFE
19.5
6.3
19.3
6.3
Graphite
7.8
-
7.5
PTFE
13.0
2.2
12.8
10
Graphite
5.2
-
5.0
PTFE
10.0
2.1
9.9
16
Graphite
4.0
-
3.8
PTFE
4.4
-
4.2
25
Graphite
1.7
-
1.6
PTFE
3.1
-
3.0
* Modulating duty - For pure control applications providing control across the full valve operating range but not guaranteeing shut-off to
a greater level than the minimum flowrate based on the valve 50:1 turndown.
Dimensions / weights (approximate) in mm and kg
135 x (161)
135 x (161)
Actuator with spring reserve
(SE and SR)
Actuators without
spring reserve
Spring reserve
(SE and SR)
Weight
2.4 kg
284
233
192
141
242
Non spring
reserve
Weight
1.3 kg
67.4
67.4
Installation and wiring
The valve should be installed in the horizontal line. The position of the actuator will depend on the type of valve to which it is fitted
and the temperature of the media. However, it is not recommended that the actuators be fitted directly below the valve or in a wet
environment. Full Installation and Maintenance Instructions are supplied with the product.
Termination details
See Installation and Maintenance Instructions for more details.
Accessories
All EL3500 actuators are supplied (as standard) with a linkage kit suitable for LE / KE valves. However, the following optional extras are
also available at extra cost:
EL3904 spare linkage kit
EL3906 spare linkage kit
EL3808 linkage kit
EL3809 linkage kit
Auxiliary potentiometer
EL3903 auxiliary switches
EL3905 high temperature kit
How to order
To receive this actuator
for use with;
For LE / KE valves.
For SPIRA-TROL control valves
For the self-acting range of valves BX, BM, SB, KA KB, KC, NS and TW (DN15 to DN50 for TW only).
For the self-acting range of valves TW (DN80 to DN100).
EL3901 (10 k) or EL3902 (220 ) are available for mounting on site. They can be used as a feedback
potentiometer and/or to provide remote indication of the valve position. A cable gland is supplied with this.
Their switching points are adjustable over the full length of the actuator stroke. The switches can be used
e.g. to provide remote indication of any stroke position. A cable gland is supplied with this.
Enables all EL3500 to be used for valve medium temperatures from 150°C to 250°C.
LE or KE valve, order:
TW DN20 to DN50, or BX,
BM, SB, KA, KB, KC, NS valves, order:
TW DN80 to DN100 valve, order:
1 - EL3501 actuator
1 - EL3501 actuator and 1 - EL3808 linkage kit
1 - EL3501 actuator and 1 - EL3809 linkage kit
EL3500 Series Electric Actuator
TI-P321-13 CH Issue 6
4.3.28
