Watts SVS User Manual
For Steam Heating Applications
ES-SV
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Series SV
Non-Vacuum Float Type,
Steam Air Vents
Series SV Non-Vacuum Float Type Steam Air Vents are
designed to vent air on non-vacuum steam heating systems.
Used on radiators, convectors and steam mains.
Model SV
For ordinary one-pipe steam systems not requiring proportional
venting, (Non-Adjustable).
1
⁄8" (3mm) angle connection
Model SVA
Adjustable air vent for proportional venting to steam heating
systems.
1
⁄8" (3mm) angle connection
Models SVS-1, SVS-2
Non-adjustable air vents for steam system.
1
⁄8" and 1⁄4" (3 and 8mm) straight connections
Model SVS-3
Straight connection, non-adjustable vent for mains.
1
⁄2", 3⁄4" (15, 20mm)
SVA
SVS-2
Typical Installations
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact
Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
One-Pipe Radiator System
Watts
Radiator
Valve
pitch piping down from here
Supply Main
Watts Air
Vent
3
⁄4
" Fitting
*See Note
3
⁄4" (20mm) Nipple
Supply Main
1-Pipe or
dry return
2-Pipe
*Add additional
vents as required.
15" (381mm) Min.
Boiler Water Line
Reducer
Main Vent
*See Note
Nipple 6" to 10"
(150 to 250mm)
18" (457mm) Min.
Wet
Return
ES-SV 0334 © Watts Regulator Co., 2003 Printed in U.S.A.
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.wattsreg.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca
Materials of construction
Float: Brass
Body: Brass
Pressure
Model SVA
Maximum operating pressure 1.5psi (10.3 kPa).
Maximum pressure 10psi (68.0 kPa).
Model SV, SVS-1, SVS-2, and SVS-3
Maximum operating pressure 6psi (41.3 kPa).
Maximum pressure 10psi (68.9 kPa).
Model SVA Adjustable Features
Top View Setting
Actual Port Opening
• Fast Venting
Full open or
7
⁄
8 port for the radiation farthest from the boiler or
hard to heat radiation (coldest rooms).
• Medium Venting
1
⁄2
or
3
⁄4
port for radiation located between middle and end of
main (warm rooms).
• Slow Venting
1
⁄8 or 1⁄4 port for radiation located closest to boiler (hot rooms).
Dimensions
31⁄
8"
(81mm)
13⁄4"
(43mm)
37⁄
16"
(89mm)
11⁄4
(32mm)
37⁄
16"
(89mm)
11⁄4"
(32mm)
SV, SVA
SVS-1, SVS-2
SVS-3
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