15601-2
HYDRONIC HEATING SYSTEMS
PIPING AND SPECIALTIES
Valves (general):
1. Gate Valves:
a. Uptoand including 2-1/2 inch - screwed or solder end, bronze body, rising
stem, solid bronze disc, 125 psi steam pressure. Equal to Nibco T-111 or
S-111.
2. Globe Valves:
a. Up to and including 2-1/2 inch - screwed or solder end, bronze body, TFE
disc, 125 psi steam pressure. Equal to Nibco T-211 or S-211.
3. Check Valves:
a. Up to and including 2-1/2 inch - screwed or solder end, bronze body,
Buna-N disc, 200 pst WOG cold pressure. Equal to Nibco T-413-W or S-
413-W.
4. Ball Valve: Acceptable in lieu of gate and globe valves for 2 inch and smaller,
full port bronze ball screwed or solder ends, 3-part bronze body, TFE or equal
resilient seat, lever handle, 400lb. WOG. Equal to NIBCO S-595-W.
Strainer:
1. "Y" Pattern: Bronze or cast iron body, screw or flange ends, 250 psi body,
stainless steel screen of 40 mesh.
2. Basket Type: Bronze or cast iron body, clamped cover, 125 psi working
pressure, perforated brass basket, equal to Mueller #125.
Air Separation (as indicated):
1. In Line: In-line cast iron or fabricated steel, removable strainer, 125lb ASME
Construction, Spirotherm, Spirovent or Equal.
Pressurized Diaphragm Expansion Tank:
Size and capacity as indicated on the Drawings.
Steel shell designed and constructed per ASME Section VIII.
Heavy duty butyl rubber diaphragm removable for inspection.
Working pressure - 125 psig.
Operating temperature - 240°F.
Vertical floor mounted style.
. Equal to Wessels NTA or equal.
riple Duty Valves
Equal to Bell & Gossett Model 3D or 3DS.
Cast iron body construction.
Designed to permit repacking under full line pressure.
Non-slam check valve with a spring loaded weighted disc and a calibrated
adjustment feature permitting regulation of pump discharge flow and shut off.
5. Acceptable in lieu of gate, check and balancing valve on discharge of each
pump.
Vents:
1. Provide vents at all piping high points and where indicated.
2. Automatic vents shall be %-inch connection, 125 PSI working pressure, brass
body with built-in air chamber. Provide gate valve between piping system and
vent.
3. Manual vents shall consist of a minimum 3/4-inch air chamber with 3/8-inch
piping and gate valve off top.
ALNEANDAAAKNS
13089K
