Bell & Gossett 87, 67, 17Sr, 17Jr, 4V Installation Manual
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BELL & GOSSETT
Bell & Gossett
ITT Fluid Technology Corporation
Miscellaneous Accessories
INSTRUCTION MANUAL
A90602
REVISION B
No. 26 Vacuum
Breaker
Nos. 87, 67 and 7
Automatic Air Vents
Nos. 17 Sr. and 17 Jr.
Automatic Air Valves
No. 4V
Coin-Operated
Air Vent
Installation, Operation and Maintenance Instructions
INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.
SAFETY
INSTRUCTION
This safety alert symbol will be used in this manual to draw
attention to safety related instructions. When used, the safety
alert symbol means ATTENTION! BECOME ALERT! YOUR
SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN A SAFETY HAZARD.
DESCRIPTION
Air vents are designed to vent the accumulation of troublesome air whenever it can be trapped.
The No. 87, 67 and 7 models are automatic air vents of float
type while the No. 17 Sr. and 17 Jr. automatic models are
hygroscopic in operation.
The No. 4V air vent is a manual type vent specially designed
for radiators.
The No. 26 vacuum breaker is designed to protect closed
vessels and piping systems against collapse when induced
vacuum exceeds design conditions. When used on steam
systems the vacuum breaker permits the normal return of
condensate to the boiler.
INSTALLATIONS INSTRUCTIONS
1. Install air vent in hydronic piping system or in hydronic system components where air is expected to accumulate and
must be removed for proper hydronic system operation.
Vacuum breakers are installed in steam systems or other
systems where vacuum from condensing steam or from
other sources must be controlled.
2. #7, #67 and #87 air vents are float type and must be
installed in the vertical position with vent connection pointing up.
3. The #87 air vent can be installed on 1/2" nipple or into a 3/4"
NPT female connection.
4. The #17 Sr and #17 Jr air vents will function better if
installed on a 1/2" or 3/4 5 5" to 6" long NPT nipple.
OPERATIONAL LIMITS
Model No. Pressure psig (Bar) Temperature ˚F (˚C)
CAUTION: Uncontrolled venting of water can
occur with automatic air vents if foreign material
prevents vent from closing. A No. 113023 overflow connector and 1/4" OD copper tube should be used to direct
unwanted flow to a drain. Failure to follow these instructions could result in property damage and/or moderate
personal injury.
CAUTION: Pipe compound can foul the air vent or
vacuum breaker operating mechanism. Use pipe
joint compound sparingly on male pipe threads only.
Failure to follow these instructions could result in property
damage and/or moderate personal injury.
CAUTION: Overtightening and breakage can
occur with the use of teflon pipe joint compounds.
Teflon provides lubricity so that care must be exercised
not to overtighten joints. Failure to follow these instructions could result in property damage and/or moderate
personal injury.
CAUTION: Venting hot water or steam can cause
injury. When working near any air vent or vacuum
breaker be careful not to get inline with vent connection.
Failure to follow these instructions could result in property
damage and/or moderate personal injury.
87 150 (10.3) 240 (116)
67 35 (2.4) 240 (116)
7 75 (5.1) 240 (116)
17Sr 30 (2.1) 225 (107)
17Jr 30 (2.1) 225 (107)
4V 150 (10.3) 250 (121)
26 2" Hg Vacuum to 150 (10.3) 240 (116)
© COPYRIGHT 1992, 1996 BY ITT INDUSTRIES, INC.
OPERA
Bell & Gossett
ITT Fluid Technology Corporation
TING INSTRUCTIONS
CAUTION: Dirt and scale from the system can foul
the automatic air vent operating mechanism. On
#7, #67 and #87 air vents keep vent cap closed tight during system filling to prevent dirt from running into valve
vent mechanism. Failure to follow these instructions
could result in property damage and/or moderate personal
injury.
1. Automatic air vents can be used for automatically or manually venting hydronic systems. To manually operate the #7,
#67 and #87 vents press down on the vent stem (tire type
valve).
CAUTION: Hot venting water can be hazardous.
Avoid contact with venting fluid and only manually
vent when system temperature is below 100˚F (38˚C).
Failure to follow these instructions could result in property
damage and/or personal injury.
To shutoff #7, #67 and #87 vents so they can not vent
automatically, (only those without overflow connector
installed), screw cap on top of vent down tight. For normal
automatic venting open cap only about one full turn so that
there is a slow release of air. A fast release of air will allow
dirt or scale to foul the vent mechanism. The small hole in
the side of the cap allows air to escape with cap in place.
When an overflow connector and tube to a safe drain is
used, continuous automatic venting is provided.
2. The #4V coin operated air vent is a manual vent and is
opened by the use of a coin or screwdriver inserted and
turned in the slotted screw on top of the vent. The vent is
opened and air bled off until water appears. Vent is then
closed by securely tightening the vent screw.
3. The #17 Sr and #17 Jr automatic air vents are not float
types and operate hygroscopically. Air is allowed to escape
but water is not. Both vents have a manual venting feature
which is operated by screwing the black plastic cap
halfway up on the #17 Sr or by opening the screw in the
center of the #17 Jr two turns maximum.
CAUTION: Hot venting water can be hazardous.
Avoid contact with venting fluid and only manually
vent when system temperature is below 100˚F (38˚C).
Failure to follow these instructions could result in property damage and/or personal injury.
Screwing the black plastic cap on the #17 Sr all the way up
cuts off manual venting but allows venting to continue.
Turning the black plastic cap all the way down on the #17
Sr closes the vent to both automatic and manual venting.
The automatic venting of the #17 Jr can not be shutoff.
Manual venting is stopped by screwing down the center
vent screw tightly.
4. The #26 vacuum breaker can be adjusted to open at any
vacuum between 1/4" Hg and 20" Hg. This is accomplished
by pulling off the brass cover and adjusting the position of
the brass nuts. The top nut is a jam nut used for locking
the set position. Threading the nuts down will increase the
vacuum at which the vent opens and threading the nuts up
will decrease the vacuum at which the vent opens. After
adjustments are made make sure the jam nut is tightened
against the spring nut so that it is locking the set position.
Replace the protective cover.
SERVICE INSTRUCTIONS
There is no service required for any of the air vents or vacuum
breaker.
CAUTION: Corrosion or leakage of vents or vacuum
breaker can cause damage or injury. Periodically
inspect the air vents or vacuum breaker for signs of leakage or corrosion. If noted the vent or vacuum breaker
must be replaced. Failure to follow these instructions
could result in property damage and/or moderate personal
injury.
For further information, contact ITT Bell & Gossett, 8200 N. Austin Avenue, Morton Grove, IL 60053,
Phone (847) 966-3700 – Facsimile (847) 966-9052.
PRINTED IN U.S.A. 5-96
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