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SKP25
U.. Pressure Regulating Gas Valve Actuators
Technical Instructions
Document Number 155-752
July 9, 2014
Siemens Building Technologies, Inc.
Page 3
Specifications,
Continued
Physical characteristics
Weight
3.5 lb (1.6 kg)
Enclosure
NEMA 1, 2, 5 and 12 for indoor use
NEMA 3, 3R, and 4 with optional AGA66 gasket
Dimensions
See Figure 3
Specification for valve bodies
See
gas valve Technical Instructions,
P/N 155-512P25
Connections
Conduit connection
Two 1/2-inch NPSM threaded knock-outs
Electrical connection
Spring loaded terminals for 14 AWG wires
Gas connection
1/4” NPT
Air connection
1/4” NPT
Gas pressure test connection
Hose barb with close-off screw
Operating characteristics Output force
100 lb (450 N)
Maximum stroke
1 inch (26 mm)
Opening time for maximum stroke
Varies with valve size, 14 seconds for max. stroke
Closing time
< 0.8 seconds
Operation/installation
Outlet pressure spring range
0" to 8.5" WC ( standard, unpainted spring, AGA29)
for SKP25.0
models
6" to 48" WC (yellow spring, AGA22)
40" to 100" WC (red spring, AGA23)
for SKP25.411U1 models
1.5 to 10 psi (standard, yellow spring, AGA22)
8.5 to 20 psi (red spring, AGA23)
With air pressure loading for SKP25.4
± 0.6" WC bias (black spring AGA28)
models or zero governor
or for SKP25.611U1
0" to – 4" WC bias (white spring)
Maximum sensing line pressure
20 psi
Maximum sensing line vacuum
3 psi for SKP25.0
models
Minimum sensing line diameter
1/4" inside diameter
Minimum distance between
sensing line and gas valve outlet
5 times the pipe diameter
Minimum time required for high to low fire 5 seconds
load changes
Auxiliary features
Proof of closure switch
Non-adjustable
Setting range of auxiliary switch
40% to 100% of stroke
Switch rating
6A/250 Vac resistive; 3A/120 Vac pilot duty
