SECTION 23 21 16
HYDRONIC PIPING SPECIALTIES
PART 1	GENERAL 
1.01	Section Includes
A.	Air eliminators
B.	Dirt separators
C.	Combination air and dirt separators
D.	Hydraulic separators with integrated air eliminator and dirt separator
E.	Automatic air vents
1.02	references
A.	ASME Section VIII, Division 1 - Boiler and Pressure Vessel Code - Pressure Vessels.
1.03	Submittals
A.	 Product Data: Submit for manufactured products and assemblies used in this Project. 
1.	Manufacturer’s data and list indicating use, operating range, total range, accuracy, and location for manufactured components. 
2.	 Submit product description, model, dimensions, component sizes, rough-in requirements, service sizes, and finishes. 
3.	 Submit schedule indicating manufacturer, model number, size, location, rated capacity, load served, and features for each piping specialty. 
1.04	Quality assurance
A.	Manufacturer Qualifications:  Company specializing in manufacturing the type of products specified in this section, with minimum twenty years of documented experience.
1.05	Warranty
A.	Manufacturer standard warranty indicating that units shall be free from material and workmanship defects from the date of substantial completion for the time periods indicated below:
1.	Fabricated steel units: 3 Years.
2.	Cast brass units: 20 Years.
1.06	delivery, storage, and handling
A.	Protect components from entry of foreign materials by temporary covers, caps and closures, completing sections of the work, and isolating parts of completed system until installation.
PART 2	products
2.01	air eliminatorS
A.	Manufacturers
1.	Spirotherm, Inc. (model VSR or VHR)
B.	Full flow coalescing type air eliminator shall be fabricated steel, rated for 150 psig working pressure, and stamped and registered in accordance with ASME Section VIII, Division 1 for unfired pressure vessels.  
C.	Selection shall be based upon system flow with pipe size as a minimum. In no case shall entering velocity exceed 10 feet per second.
D.	Unit shall include internal structured elements filling the entire vessel to suppress turbulence and provide air elimination efficiency of 100% free air, 100% entrained air, and 99.6% dissolved air at the installed location. The elements must be fabricated by the manufacturer and consist of a copper core tube with continuous wound copper wire medium permanently attached and followed by a separate continuous wound copper wire permanently affixed.
E.	Each unit shall have a separate venting chamber to prevent system contaminants from harming the float and venting valve operation. At the top of the venting chamber shall be an integral full port float actuated brass venting mechanism.
F.	 Units shall include a side tap valve to flush floating dirt or liquids and for quick bleeding of large amounts of air during system fill or refill.
2.02	Dirt separators
A.	Manufacturers
1.	Spirotherm, Inc. (model TDT, THT, TDN or THN)
B.	Full flow coalescing type dirt separator shall be fabricated steel, rated for 150 psig working pressure, and stamped and registered in accordance with ASME Section VIII, Division 1 for unfired pressure vessels.  
C.	Selection shall be based upon system flow with pipe size as a minimum. In no case shall entering velocity exceed 10 feet per second.
D.	Unit shall include internal structured elements filling the entire vessel to suppress turbulence and provide minimum dirt separation efficiency of 80% of all particles 30 micron and larger within 100 passes. The elements must be fabricated by the manufacturer and consist of a copper core tube with continuous wound copper wire medium permanently attached and followed by a separate continuous wound copper wire permanently affixed.
E.	A system strainer shall be installed upstream ahead of the dirt separator to catch all large material that may have been left in piping during construction.
F.	Optional: Unit shall be manufactured with a removable lower head for internal inspection if so noted on the drawings and schedule.
2.03	combination air eliminator and dirt separators
A.	Manufacturers
1.	Spirotherm, Inc. (model VDT, VHT, VDN or VHN)
B.	Full flow coalescing type combination air eliminator and dirt separator shall be fabricated steel, rated for 150 psig working pressure, stamped and registered in accordance with ASME Section VIII, Division 1 for unfired pressure vessels, and include two equal chambers above and below the inlet / outlet nozzles.
C.	Selection shall be based upon system flow with pipe size as a minimum. In no case shall entering velocity exceed 10 feet per second.
D.	Unit shall include internal structured elements filling the entire vessel to suppress turbulence and provide air elimination efficiency of 100% free air, 100% entrained air, and 99.6% dissolved air at the installed location. Dirt separation efficiency shall be a minimum of 80% of all particles 30 micron and larger within 100 passes. The elements must be fabricated by the manufacturer and consist of a copper core tube with continuous wound copper wire medium permanently attached and followed by a separate continuous wound copper wire permanently affixed.
E.	Each unit shall have a separate venting chamber to prevent system contaminants from harming the float and venting valve operation. At the top of the venting chamber shall be an integral full port float actuated brass venting mechanism.
F.	Units shall include a side tap valve to flush floating dirt or liquids and for quick bleeding of large amounts of air during system fill or refill.
G.	Optional: Unit shall be manufactured with a removable lower head for internal inspection if so noted on the drawings and schedule.
H.	Optional: Unit shall be manufactured with internal magnet(s), if so noted on the drawings and schedule.
1.	Magnet(s) shall be positioned at the centerline of the inlet and outlet nozzles for maximum effectiveness during normal operation.
a.	Units sized 2” through 6” shall have one magnet 
b.	Units with 8” though 12” shall have two magnets
2.	Magnet(s) shall be removable from the vessel.
3.	Magnet(s) shall be made of high-strength Neodymium alloy.
4.	Magnet(s) shall be disengaged for dirt blowdown by means of a spring-loaded pull, without requiring removal of the magnet from the vessel or isolating the unit from the system.
5.	Magnet option shall be provided with 360 rotatable  blow down valve.  
2.04	hydraulic separator with integrated air eliminator and dirt separator
A.	Manufacturers
1.	Spirotherm, Inc. (model VDX, VXN)
B.	Full flow coalescing type hydraulic separator shall be fabricated steel, rated for 150 psig working pressure, stamped and registered in accordance with ASME Section VIII, Division 1 for unfired pressure vessels, and include three performance chambers within the vessel.  One chamber above the higher nozzle set for air elimination, one below the lower nozzle set for dirt separation, and one between the nozzles for hydraulic separation.
C.	 Selection shall be based upon system flows with pipe size as a minimum.
D.	Unit shall include internal structured elements filling the entire vessel to suppress turbulence and provide air elimination efficiency of 100% free air, 100% entrained air, and 99.6% dissolved air at the installed location. Dirt separation efficiency shall be a minimum of 80% of all particles 30 micron and larger within 100 passes. The elements must be fabricated by the manufacturer and consist of a copper core tube with continuous wound copper wire medium permanently attached and followed by a separate continuous wound copper wire permanently affixed.
E.	Each unit shall have a separate venting chamber to prevent system contaminants from harming the float and venting valve operation. At the top of the venting chamber shall be an integral full port float actuated brass venting mechanism.
F.	Optional: Unit shall be manufactured with a removable lower head for internal inspection if so noted on the drawings and schedule.
G.	Optional: Unit shall be manufactured with internal magnet(s), if so noted on the drawings and schedule.
1.	Magnet(s) shall be positioned at the centerline of the bottom inlet and bottom outlet nozzles for maximum effectiveness during normal operation.
a.	Units sized 2” through 6” shall have one magnet 
b.	Units with 8” though 12” shall have two magnets
2.	Magnet(s) shall be removable from the vessel.
3.	Magnet(s) shall be made of high-strength Neodymium alloy.
4.	Magnet(s) shall be disengaged for dirt blowdown by means of a spring-loaded pull, without requiring removal of the magnet from the vessel or isolating the unit from the system.
5.	Magnet option shall be provided with 360 rotatable  blow down valve.  
2.05	automatic air vents
A.	Manufacturers
1.	Spirotherm, Inc. (model VTP)
B.	All valves shall be cast brass, rated for 150 psig design pressure and 270°F operating temperature.
C.	Units to include non-ferrous floats, stainless steel linkage and a Viton seal which closes against a brass spring operated seat.
PART 3	Execution
3.01	Installation
A.	Install specialties in accordance with manufacturer's instructions.
B.	Air eliminator should be installed at the point of lowest solubility in the system: that being where the temperature is the highest (i.e. after the boiler and/or heat exchanger or before the chiller) and the pressure is the lowest (i.e. before the pump suction),
C.	Dirt separators should be installed upstream of the system components that are affected by the dirt in the system.  It does not take the place of a system strainer and should be installed after that a strainer to ensure no large construction type debris enters the dirt separator.
D.	Air eliminator, dirt separators and hydraulic separators must be mounted in a straight run of horizontal piping in a perfectly upright position to allow the vent to operate freely and/or dirt to settle. There is no minimum length of straight run required before or after the unit.
E.	The flow may be directed to either side of the unit. There is NO directional arrow. Either connection may be used for inlet or outlet.
F.	Automatic air vents should be installed at high points in the system and / or on specific components requiring a separate vent.
3.02	maintenance
A.	Periodic blow-down through the bottom connection to purge any dirt or sediment collected in the bottom of the vessel is system dependent and may or not be necessary subject to other installed components  and overall piping or system condition. A container should be used to catch any debris.
B.	Units with optional removable head can be disassembled and the elements removed for inspection or cleaning. The removable head is a user-specified feature and frequency of inspection and/or cleaning is user or system dependent.

END OF SECTION