SECTION 15515

HYDRONIC SPECIALTIES

PART 1 GENERAL

WORK INCLUDED

Expansion tanks.

Air vents.

Air separators.

Strainers.

Pump suction fittings.

Combination fittings.

Flow indicators, controls, meters.

Radiator valves.

Relief valves.

Glycol specialties.

RELATED WORK

Section 15510 - Hydronic Piping.

Section [_____ - _____:] Pipe cleaning.

REFERENCES

ANSI/ASME - Boilers and Pressure Vessels Code.

REGULATORY REQUIREMENTS

Conform to ANSI/ASME Boilers and Pressure Vessels Code Section 8D for manufacture of tanks.

QUALITY ASSURANCE

Manufacturer: For each product specified, provide components by same manufacturer throughout.

SUBMITTALS

Submit [shop drawings and] product data under provisions of Section [01300.] [01340.]

Submit [shop drawings and] product data for manufactured products and assemblies required for this project.

Include component sizes, rough-in requirements, service sizes, and finishes. Include product description, model[.] [and dimensions.]

Submit inspection certificates for pressure vessels from [___________________.] [authority having jurisdiction.]

Submit manufacturer's installation instructions under provisions of Section [01300.] [01340.]

OPERATION AND MAINTENANCE DATA

Submit operation and maintenance data under provisions of Section [01700.] [01730.]

Include installation instruction, assembly views, lubrication instructions, and replacement parts list.

DELIVERY, STORAGE, AND HANDLING

Deliver products to site under provisions of Section [01600.] [01610.]

Store and protect products under provisions of Section [01600.] [01610.]

EXTRA STOCK

Provide [one] [_____] extra [one] [10] [45] gallon ([4] [40] [170] L) drum of [ethylene] [propylene] glycol under provisions of Section [01700.] [01750.]

PART 2 PRODUCTS

ACCEPTABLE MANUFACTURERS - EXPANSION TANKS

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

EXPANSION TANKS

Construction: Closed, welded steel, tested and stamped in accordance with Section 8D of ANSI/ASME Code; [100] [125] [_____] psi ([690] [860] [_____] kPa) rating; cleaned, prime coated, and supplied with steel support saddles; with tappings for installation of accessories.

Gage Glass Set: Brass compression stops, guard, and 3/4 inch (20 mm) [red line] glass, maximum 24 inches (610 mm) length, long enough to cover tank for 2 inches (50 mm) above bottom to 2 inches (50 mm) below top.

Quick Connect Air Inlet: Automotive tire valve type, manual air vent, tank drain, and pressure relief valve.

Automatic Cold Water Fill Assembly: Pressure reducing valve, reduced pressure double check back flow preventer, test cocks, strainer, vacuum breaker, and valved by-pass.

Hot Water Heating System: Set expansion tank pressure relief valve at [_____] psi ([_____] kPa) maximum and pressure reducing valve at [_____] psi ([_____] kPa.

Chilled Water System: Set expansion tank pressure relief valve at [_____] psi ([_____] kPa) maximum and pressure reducing valve at [_____] psi ([_____] kPa).

Size: [_____] diameter, [_____] overall length, [_____] capacity.

ACCEPTABLE MANUFACTURERS - DIAPHRAGM-TYPE COMPRESSION TANKS

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

DIAPHRAGM-TYPE COMPRESSION TANKS

Construction: Welded steel, tested and stamped in accordance with Section 8D of ANSI/ASME Code; supplied with National Board Form U-1, rated for working pressure of 125 psig (860 kPa), with flexible [EPDM] diaphragm sealed into tank, and steel legs or saddles.

Accessories: Pressure gage and air-charging fitting, tank drain; precharge to [12] [_____] psig ([80] [_____] kPa).

Size: [_____] diameter, [_____] overall length, [_____] capacity.

ACCEPTABLE MANUFACTURERS - AIR VENTS

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.]

[01630.]

AIR VENTS

Manual Type: Short vertical sections of 2 inch (50 mm) diameter pipe to form air chamber, with 1/8 inch (3 mm) brass needle valve at top of chamber.

Float Type: Brass or semi-steel body, copper float, stainless steel valve and valve seat; suitable for system operating temperature and pressure; with isolating valve.

Washer Type: Brass with hydroscopic fiber discs, vent ports, adjustable cap for manual shut-off, and integral spring loaded ball check valve.

ACCEPTABLE MANUFACTURERS - AIR SEPARATORS

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

AIR SEPARATORS

Dip Tube Fitting: For 125 psig (860 kPa) operating pressure; to prevent free air collected in boiler from rising into system.

In-line Air Separators: Cast iron for sizes 1-1/2 inch (40 mm) and smaller, or steel for sizes 2 inch (50 mm) and larger; tested and stamped in accordance with Section 8D of ANSI/ASME Code; for 125 psig (860 kPa) operating pressure.

Air Elimination Valve: Bronze, float operated, for 125 psig (860 kPa) operating pressure.

Combination Air Separators/Strainers: Steel, tested and stamped in accordance with Section 8D of ANSI/ASME Code, for 125 psig (860 kPa) operating pressure, with galvanized steel integral strainer with 3/16 inch (5 mm) perforations, tangential inlet and outlet connections, and internal stainless steel air collector tube.

ACCEPTABLE MANUFACTURERS - STRAINERS

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

STRAINERS

Size 2 inch (50 mm) and Under: Screwed brass or iron body for 175 psig (1 200 kPa) working pressure, Y pattern with 1/32 inch (0.8 mm) stainless steel perforated screen.

Size 2-1/2 inch (65 mm) to 4 inch (100 mm): Flanged iron body for 175 psig (1 200 kPa) working pressure, Y pattern with 3/64 inch (1.2 mm) stainless steel perforated screen.

Size 5 inch (125 mm) and Larger: Flanged iron body for 175 psig (1 200 kPa) working pressure, basket pattern with 1/8 inch (3.2 mm) stainless steel perforated screen.

ACCEPTABLE MANUFACTURERS - PUMP SUCTION FITTINGS

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

PUMP SUCTION FITTINGS

Fitting: Angle pattern, cast-iron body, threaded for 2 inch (50 mm) and smaller, flanged for 2-1/2 inch (65 mm) and larger, rated for 175 psig (1 200 kPa) working pressure, with inlet vanes, cylinder strainer with 3/16 inch (5 mm) diameter openings, disposable fine mesh strainer to fit over cylinder strainer, and permanent magnet located in flow stream and removable for cleaning.

Accessories: Adjustable foot support, blowdown tapping in bottom, gage tapping in side.

ACCEPTABLE MANUFACTURERS - COMBINATION PUMP DISCHARGE VALVES

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

COMBINATION PUMP DISCHARGE VALVES

Valves: Straight or angle pattern, flanged cast-iron valve body with bolt-on bonnet for 175 psig (1 200 kPa) operating pressure, non-slam check valve with spring- loaded bronze disc and seat, stainless steel stem, and calibrated adjustment permitting flow regulation.

ACCEPTABLE MANUFACTURERS - FLOW INDICATORS

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

FLOW INDICATORS

Brass construction, threaded for insertion into piping system, packless, with paddle with removable segments, vapor proof electrical compartment with switches.

ACCEPTABLE MANUFACTURERS - FLOW CONTROLS

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

FLOW CONTROLS

Construction: Brass or bronze body with union on inlet[,] [and outlet,] temperature and pressure test plug on inlet [and outlet] [blowdown/backflush drain.]

Calibration: Control flow within 5 percent of selected rating, over operating pressure range of 10 times minimum pressure required for control, maximum minimum pressure [3.5] [_____] psig ([24] [_____] kPa).

Control Mechanism: Stainless steel or nickel plated brass piston or regulator cup, operating against stainless steel helical or wave formed spring.

Accessories: In-line strainer on inlet and ball valve on outlet.

ACCEPTABLE MANUFACTURERS - FLOW METERS

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

FLOW METERS

Orifice principle by-pass circuit with direct reading gage, soldered or flanged piping connections for 125 psig (860 kPa) working pressure, with shut off valves, and drain and vent connections.

Cast iron, wafer type, orifice insert flow meter for 250 psig (1 720 kPa) working pressure, with read-out valves equipped with integral check valves with gasketed caps.

Calibrated, plug type balance valve with precision machined orifice, readout valves equipped with integral check valves and gasketed caps, calibrated nameplate and indicating pointer.

Cast iron or bronze, globe style, balance valve with handwheel with vernier type ring setting and memory stop, [drain connection,] readout valves[.] [equipped with integral check valves and gasketed caps.]

Portable meter consisting of case containing [one, 3 percent accuracy pressure gage with 0-60 feet (0-180 kPa) pressure range] [two, 3 percent accuracy pressure gages with 0-135 inches (0-34 kPa) and 0-60 feet (0-180 kPa) pressure ranges] for 500 psig (3 450 kPa) maximum working pressure, color coded hoses for low and high pressure connections, and connectors suitable for connection to read-out valves.

ACCEPTABLE MANUFACTURERS - RADIATOR VALVES

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

RADIATOR VALVES

Angle or straight pattern, [rising stem,] inside screw globe valve for 125 psig (860 kPa) working pressure, with bronze body and integral union for screwed connections, renewable composition disc, plastic wheel handle for shut-off service, and lockshield key cap [and set screw memory bonnet] for balancing service.

ACCEPTABLE MANUFACTURERS - RELIEF VALVES

[___________________________________________.]

[___________________________________________.]

[___________________________________________.]

Substitutions: Under provisions of section [01600.] [01630.]

RELIEF VALVES

Bronze body, teflon seat, stainless steel stem and springs, automatic, direct pressure actuated, capacities ASME certified and labelled.

GLYCOL SYSTEM

Mixing Tank: [45] [_____] gallon ([170] [_____] L) steel drum with fittings suitable for filling and hand pump for charging, rubber hose for connection of hand pump to system.

Storage Tank: Closed type, welded steel constructed, tested and stamped in accordance with Section 8D of ANSI/ASME Code; [100] [125] [_____] psi ([690] [860] [_____] kPa) rating; cleaned, prime coated, and supplied with steel support saddles. Construct with tappings for installation of accessories.

Expansion Tank: [Diaphragm] expansion tank and vent fitting with air [separator,] [eliminator,] and automatic air vent.

Air Pressure Reducing Station: Pressure reducing valve with shut-off valves, strainer, check valve and needle valve bypass.

Glycol Solution: Inhibited [ethylene] [propylene] glycol and water solution mixed [50-50] [_____] suitable for operating temperatures of [-40] [_____] degrees F ([-40] [_____] degrees C).

PART 3 EXECUTION

INSTALLATION AND APPLICATION

Install specialties in accordance with manufacturer's instructions to permit intended performance.

Support tanks inside building from building structure[.] [in accordance with manufacturer's instructions.]

Where large air quantities can accumulate, provide enlarged air collection standpipes.

Provide manual air vents at system high points and as

indicated.

For automatic air vents in ceiling spaces or other concealed locations, provide vent tubing to nearest drain.

Provide air separator on suction side of system circulation pump and connect to expansion tank.

Provide valved drain and hose connection on strainer blow down connection.

Provide pump suction fitting on suction side of base mounted centrifugal pumps[.] [where indicated.] Remove temporary strainers after cleaning systems.

Provide combination pump discharge valve on discharge side of base mounted centrifugal pumps[.] [where indicated.]

Support pump fittings with floor mounted pipe and flange supports.

Provide radiator valves on water inlet to terminal heating units such as radiation, unit heaters, and fan coil unit.

Provide radiator balancing valves on water outlet from terminal heating units.

Provide relief valves on pressure tanks, low pressure side of reducing valves, heat exchangers, and expansion tanks.

Select system relief valve capacity so that it is greater than make-up pressure reducing valve capacity. Select equipment relief valve capacity to exceed rating of connected equipment.

Pipe relief valve outlet to nearest floor drain.

Where one line vents several relief valves, make cross sectional area equal to sum of individual vent areas.

Clean and flush glycol system before adding glycol solution. Refer to Section [_____.]

Feed glycol solution to system through make-up line with pressure regulator, venting system high points. [Set to fill at 12 psig (80 kPa).] [Pressure system cold at 5 psig (35 kPa).]

Perform tests determining strength of ethylene glycol and water solution and submit written test results.

EXPANSION TANK SCHEDULE

Drawing_Code	TK-1	TK-2	TK-3 TK-4

Location

Service

Capacity

Diameter

Length

END OF SECTION