Install Instructions
Page 1 of 3
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Installation & Maintenance Instructions
SERIES
Form No.V8525
2-WAY DIRECT-ACTING SOLENOID VALVES
NORMALLY CLOSED OPERATION Ċ 3/8, 1/2 OR 3/4 NPT
SV311
FUEL GAS SERVICE
WARNING
To prevent the possibility of death, serious injury or
property damage, the Series SV311 Gas Valve must be
installed and serviced (tested) only by a qualified
service technician avoiding the following hazards:
Electrical Hazard. Turn off electrical power to
solenoid.
S Pressure Hazard. Depressurize valve and vent
hazardous or combustible fluid to a safe area before
inspecting or removing the valve from service.
S Explosion/Fire Hazard. Extinguish all open flames
and avoid any type of sparking or ignition when
leakage testing.
Service Notices
Except for solenoid replacement, the Series SV311 valves are
not repairable. When any performance problems are detected
during routine inspection, replace valve immediately.
See separate solenoid installation and maintenance
instructions for information on: Wiring, Solenoid
Temperature, Causes of Improper Operation, and Solenoid
Replacement.
DESCRIPTION
Series SV311 valves are 2-way normally closed direct-acting
solenoid valves designed for fuel gas service. Valve bodies are
made of rugged aluminum with trim and internal parts made
of steel and stainless steel. Series SV311 valves are provided
with a general purpose/watertight solenoid.
Provisions for Seat Leakage Testing
Series SV311 valves are provided with a 1/8 NPT
downstream side tap and pipe plug for checking seat
leakage. LeakageĂ testing frequency shall be at least
annually in accordance with NFPA-86 or original
equipmentĂ manufacturer Ărecommendations.
OPERATION
Normally Closed: Valve is closed when solenoid is
de-energized; open when energized.
NOTE: No minimum operating pressure differential
required.
INSTALLATION
Check nameplate for correct catalog number, pressure,
voltage, frequency, and service. Never apply incompatible
fluids or exceed pressure rating of the valve.
Temperature Limitations
Ambient and fluid temperature range: -40F (-40C) to
175F (79C).
Positioning
This valve is designed to perform properly when mounted in
any position. However, for optimum life and performance,
the solenoid should be mounted vertically and upright to
reduce the possibility of foreign matter accumulating in the
plugnut/core tube sub-assembly area.
Piping
CAUTION: Piping must comply with applicable
local and national codes and ordinances, including
the National Fuel Gas Code ANSIĂ Z223.1/NFPA ĂNo. 54.
Connect piping to valve according to markings on valve
body. The use of a drip leg is recommended. Apply pipe
compound sparingly to male pipe threads only. If applied to
valve threads, the compound may enter the valve and cause
operational difficulty. Avoid pipe strain by properly
supporting and aligning piping. When tightening the pipe,
do not use valve or solenoid as a lever. Locate wrenches
applied to valve body or piping as close as possible to
connection point. Valves should be checked for external
leakage at piping connections after installation, see Testing
for External Leakage section.
CAUTION: To avoid damage to the valve body, DO
NOT OVERTIGHTEN PIPE CONNECTIONS. If TEFLON*
tape, paste, spray or similar lubricant is used, use extra
care when tightening due to reduced friction.
CAUTION: To protect the solenoid valve, install a
strainer or filter, suitable for the service involved, in the
inlet side as close to the valve as possible. Clean
periodically depending on service conditions. See
ASCO Series 8600, 8601 and 8602 for strainers.
*DuPont's Registered Trademark