These instructions refer to the current Compac S2-350 solenoid valve. The
solenoids are available in several types: Standard, high oil and low temperature.
Always quote the dispenser serial number when ordering parts and check the
model number on the valve body before installation.
NOTE: For applications where the gas has a high oil content, a special piston with
an O ring seal is available. If you are having problems, discuss this option with your
service agent. If the special piston is used for low oil content gas, no harm will
occur, but the service life of the seal may be shortened.
Before you start, make sure you have:
- A seal kit - Part number FC-SK-0001
▪ 1 x Teflon valve seal
▪ 1 x solenoid top O-ring seal
▪ 1 x gas return line O-ring seal
- O-ring lubricant
- Solenoid piston – Part number FC-VLV-PSTN-0001 (optional standard)
- Solenoid piston – Part number FC-VLV-PSTN-S2 (optional high oil)
- Solenoid top service kit standard. Part number FC-SVK-0003 (replace valve top
if leak detected through stem)
- Solenoid top service kit - low temperature option (-40 degrees C). Part number
FC-SVK-0004 (replace valve top if leak detected through stem).
CAUTION: Never remove or service the stem. If it is leaking, it must be replaced
using the appropriate top service kit.
CAUTION: Cleanliness is essential. When working on the open solenoid assembly,
cover the opening with a cloth to prevent dust and dirt from entering.
CAUTION: O-rings that are subjected to natural gas at high gaswell when exposed
to air. Once swollen, they cannot be reused and must be replaced.
CAUTION: The Nitrile O-rings have a life span of over 10 years from cure date but
improper handling of these O-rings before use can shorten their useful life. O-rings
will deteriorate if exposed to ozone or ultraviolet light so keep in original packaging
and away from UV light. If in unsure about their condition, do not use old O-rings
and order new ones.
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