Spirax Sarco 6A Air Vent Installation guide

Spirax Sarco
Brand
Spirax Sarco
Model
6A Air Vent
Type
Installation guide

This manual is also suitable for

Spirax Sarco 6A Air Vent is a versatile device designed for use in systems where air, condensate, and steam may be present, such as one-pipe steam heating systems. It effectively discharges air while preventing the escape of condensate or steam. The vent features both a float and a thermostatic bellows, ensuring reliable operation under varying conditions. Its outlet check valve further prevents the re-entry of air. The 6A Air Vent is suitable for installation at the highest point in piping systems or equipment where air tends to accumulate.

Spirax Sarco 6A Air Vent is a versatile device designed for use in systems where air, condensate, and steam may be present, such as one-pipe steam heating systems. It effectively discharges air while preventing the escape of condensate or steam. The vent features both a float and a thermostatic bellows, ensuring reliable operation under varying conditions. Its outlet check valve further prevents the re-entry of air. The 6A Air Vent is suitable for installation at the highest point in piping systems or equipment where air tends to accumulate.

Complete rebuild of all internals
(except float) element set #3
• Remove 6Aunit from pipe work.
• Loosen inlet cap #2 and remove from body.
• Remove thermostatic element #3-4 and discard.
• Remove valve head #5 from float #10.
• Loosen sealing nut #9.
• Remove valve seat #6 from body.
• Remove spring clip #8 from valve seat #6 and remove ball
valve #7.
• Thread new thermostatic element #3-4 into cap, torque to
12-15 ft-lbs.
• Assemble new valve head #5 to float #10, snug up (do not
over tighten).
• Thread new valve seat fitting #6 into body #1 a few turns
. Back sealing ring #9 off so it doesn’t bind on body.
• Holding 6Awith valve seat fitting down. Take float/valve head
assembly and place it in side the body. Make sure the valve
head #5 slides into valve seat fitting #6.
• Thread cap assembly with thermostat on to body and torque
to 110-120 ft-lbs.
• Turn valve seat fitting #6 clockwise until head and seat touch.
(note: do not turn tight, which will compress thermostat)
• With valve head #5 touching the seat #6 (valve closed). Back
off valve seat fitting 1-1/4 turns which will give you a travel
of .078".
• Hold valve seat fitting in position and tighten sealing ring #9.
IMI 4.008
May 2004
6A Air Vent
INSTALLATION AND MAINTENANCE INSTRUCTIONS
The 6A Air Vent has both a float and a thermostatic
bellows for use where air, condensate and steam may
be present (as in one pipe steam heating systems.)
The 6A will discharge air, while preventing the escape
of either condensate or steam. An outlet check valve
prevents the re-entry of air.
Limiting Operating Conditions
Max. Operating Pressure (PMO) 15 psig (1 barg)
I n s t a l l a t i o n
The air vent should be positioned with the inlet at the bottom at the
highest point in the piping system or equipment where air collects.
The valve will be closed when either condensate or steam enters
the body. The discharge can be hot and wet, and the 6Ashould be
positioned accordingly.
Spare Parts
Element Set* 3
Element 3A
Seat & Gasket 4 & 5
Float 6
* Part No. 3 Element Set
converts Type 6T Air Vent
to current Type 6A design.
SPIRAX SARCO, INC. • 1150 NORTHPOINT BLVD. • BLYTHEWOOD, SC 29016
PHONE 803-714-2000 • Fax 803-714-2222
Spirax Sarco Applications Engineering Department
Toll Free at:
1-800-833-3246
6
3A
3
6
7
9
6
5
1
10
3
4
2
4& 5
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Spirax Sarco 6A Air Vent Installation guide

Spirax Sarco
Brand
Spirax Sarco
Model
6A Air Vent
Type
Installation guide
This manual is also suitable for

Spirax Sarco 6A Air Vent is a versatile device designed for use in systems where air, condensate, and steam may be present, such as one-pipe steam heating systems. It effectively discharges air while preventing the escape of condensate or steam. The vent features both a float and a thermostatic bellows, ensuring reliable operation under varying conditions. Its outlet check valve further prevents the re-entry of air. The 6A Air Vent is suitable for installation at the highest point in piping systems or equipment where air tends to accumulate.

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