11/99 3 - 10 DS 3.401
Note: Actuators ALX 1251 and ALE 1352 are short stroke actuators
and cannot connect to any valves using the linkage kits detailed in the
above table.
CONSTRUCTION
VALVE STROKE TIME
This table gives total stroke time related to type, size and stroke of valve with type of actuator used.
LINKAGE KITS
SPECIFICATION
VALVE
MANUFACTURER
VALVE
LNK 1501 Landis & Gyr VVF52
LNK 1502 Honeywell V5011A
LNK 1503 Fisher Y Body ¾" to 1½", A Body 1½"
LNK 1504 Fisher Y Body 2" to 3", A Body 2" to 4"
LNK 1505 Hymatic 1700 ¾" to 1½", 1450 1¼", 1400R 1½"
LNK 1506 Hymatic 1400R 2" to 3", 1700 2" to 3"
LNK 1521 Siebe VB up to 2"
Case: Mild steel baseplate with moulded polycarbonate housing and removable terminal cover (fire resistant
to UL94V-0).
Mounting Bracket: Die cast aluminium
Protection Class: IP 54
Drive: Operates on screw-jack principle, driven by a reversible synchronous motor via a gear train.
Motor: Split phase, capacitor reversing type, continuously rated.
Gear Ratio: Standard speed (8.5 s/mm) 89:1
Medium speed (5.0 s/mm) 51:1
Fast speed (2.5 s/mm) 51:1
Super Fast speed (1.8 s/mm) 27:1
Spindle Coupling: Freely rotating coupling, screwed:
3
/
8
" 24-UNF, female (ALM 1601, ALX 1201, ALE 1302, 1327, 1376)
¼" 32-UNEF, female (ALX 1251, ALE 1352)
Manual Operator & Override: Hand operator with gear train disengagement feature.
Position Indicator: Spindle anti-rotation plate moves against stroke scale on mounting bracket. Marked 0 to 10,
representing 0 to 100% stroke. Fix scale to suit valve stroke, see 'Commissioning'.
Limit & Transfer Switches: ALM & ALX: Load dependent switches, self-adjusting to match valve stroke. Control signal transfers
from terminal 1 to 1T and 2 to 2T at respective limits of valve stroke (not electrically separate).
ALE: Limit switches operate as for other actuators, but are internally connected between electronics
card and motor windings. The transfer function is not necessary as multi-stage sequencing is derived
from the 0-10 Volt output signals from the MMC or other multi-stage controllers.
Electronic Positioner:
(ALE only)
Built-in printed circuit board connected by plug and socket for easy servicing. Internally connected to
1000 Ohm position feedback potentiometer, driven via gears from output shaft. Separate 0-10Vdc
output signal available to monitor position or as a service aid.
Terminals: Accept 2 x 1.5mm² or 1 x 2.5mm² cable
Conduit Entries: Three x 21mm dia. knockout (detachable plate). (Use only bottom two on ALE.)
Auxiliary Switches: Available as add-on accessory, see 'specification'.
Note: ALX 1251 and ALE 1352 have one voltage-free single pole change-over switch rated 5A, 250V,
built-in. Operating point, non-adjustable, is just before limit switch at position '0'.
VALVE TYPE AND SIZE VALVE
STROKE
VALVE STROKE TIME (Secs)
Actuator speed
8.5 s/mm
Actuator speed
5.0 s/mm
Actuator speed
2.5 s/mm
Actuator speed
1.8 s/mm
VZ & MZ ½" & ¾"
VSF & MJF 15mm
9.5mm (
3
/
8
") 81 48 24 17
VZ & MZ 1"-2"
VSF & MJF 20, 25mm
15.9mm (
5
/
8
") 135 80 40 29
VSF & MJF 32-50mm
VZF & MZF 65-100mm
25.4mm (1") 216 – 64 46
VZF & MZF 125, 150mm 38mm (1½") 323 – 95 69
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