Hydronic Piping Accessories

Hydronic Piping Accessories

SECTION 23 2113.43

HYDRONIC PIPING ACCESSORIES

PART 1 – GENERAL

1.1 SUMMARY

  1. This section includes the following types of pumps:
  2. Pump specialty fittings: Suction diffusers, triple duty valves.
  3. Air control devices.
  4. Hydronic piping specialties.

1.2 REFERENCED STANDARDS

  1. National Electrical Code Compliance: Components shall comply with NFPA 70 "National Electrical Code."
  2. ASTM A159-83(2006) Standard Specification for Automotive Gray Iron Castings

1.3 SUBMITTALS

  1. General: In addition to procedures specified in Division 1, comply with the following.
  2. Tag submitted data with the corresponding designation of that item as scheduled in the construction documents. All information submitted shall be individually "tagged" to easily identify it with the corresponding material or equipment. Failure to comply with this requirement will result in that item or, at the discretion of the Engineer, all items submitted, being rejected without being reviewed.
  3. Product data: Furnish catalog information, performance data, and accessories provided for the product indicated.
  4. Operation and Maintenance Data: Provide installation, operation and maintenance (IOM) manuals on all equipment, factory assembly drawings and field installation drawings as required for a complete explanation and description of all items of equipment.
  5. Include installation instructions, assembly views, lubrication instructions, and replacement parts lists.

1.4 QUALITY ASSURANCE

  1. Single Source Responsibility: Obtain equipment from a single manufacturer.
  2. Equipment manufacturer shall be a company specializing in manufacture, assembly, and field performance of provided equipment with a minimum of 20 years experience.
  3. A Manufacturers' Data Report for Pressure Vessels, Form U-1 as required by the provisions of the ASME Boiler and Pressure Vessel Code shall be furnished for each compression tank upon request.

PART 2 – PRODUCTS

2.1 PUMP SPECIALTY FITTINGS

  1. Subject to compliance with requirements below, provide fittings from one of the following manufacturers:
  2. Basis of design: Bell & Gossett, ITT Fluid Handling.
  3. Other pre-approved manufacturer.
  1. Suction Diffuser: Angle or straight pattern, 175-psig pressure rating, cast-iron or ductile iron body and end cap, pump-inlet fitting; with 16 mesh bronze startup strainer and carbon steel or stainless steel combination diffuser-strainer-orifice cylinder with 3/16" diameter perforations to protect the system pump; carbon or stainless-steel straightening vanes; drain plug; and factory- or field-fabricated support.
  1. Triple-Duty Valve: Angle or straight pattern, designed to perform the functions of a nonslam check valve, throttling valve, shutoff valve and calibration balancing valve; 300-psig pressure rating at 250ºF, cast-iron body with bronze seat, pump-discharge fitting; with drain plug. The valve design shall permit repacking under full system pressure. The valve shall be equipped with brass readout valve (with integral check valve) for taking differential pressure readings across the orifice for accurate system balance.

2.2 AIR/SEDIMENT CONTROL DEVICES

  1. Subject to compliance with requirements below, provide fittings from one of the following manufacturers:
  2. Basis of design: Bell & Gossett, ITT Fluid Handling.
  3. Other pre-approved manufacturer.
  1. Expansion tanks
  2. Furnish and install as scheduled pre-charged steel expansion tank(s) with replaceable heavy duty Butyl rubber bladder or diaphragm.
  3. Each tank shall have a .302"-32 charging valve connection (standard tire valve) to facilitate the on-site charging of the tank to meet system requirements.
  4. Each tank shall be fitted with lifting rings and a floor mounting skirt for vertical installation, or designed for horizontal installation, as scheduled.
  5. Each tank must be constructed in accordance with Section VIII of the ASME Boiler and Pressure Vessel Code and stamped 125 PSI (862 kPa) working pressure.
  1. Compression tanks
  2. Furnish and install as scheduled horizontal steel compression tank(s).
  3. Each tank shall have two ½” NPT gauge glass tappings in one head.
  4. Each tank shall be fitted with a minimum of two tappings in the shell for system connections.
  5. Each tank must be constructed in accordance with Section VIII of the ASME Boiler and Pressure Vessel Code and stamped 125 psig (862 kPa) working pressure.
  6. Air control tank fitting shall be cast iron body, copper or copper plated tube, brass vent tube fitting, stainless steel ball check valve (100 gallon and larger), 175 psig working pressure, sized for compression tank
  7. Tank drain fitting shall be brass body fitting designed to admit air to compression tank, drain water, and close off system.
  8. Gauge glass: Full height with shutoff valves
  9. Tank shall be painted with one shop coat of air dry enamel
  1. Tangential-type air separators
  2. Furnish and install, as scheduled, a centrifugal, tangential type air separator.
  3. The unit shall have inlet and outlet flanged connections tangential to the vessel shell.
  4. The unit shall have an internal galvanized steel strainer and air separator with 3/16" (4.8mm) perforations and 51 percent open area designed to direct accumulated air to the compression tank (air control system) or air vent (air elimination system) via an NPT vent connection at top of unit.
  5. A blowdown connection shall be provided to facilitate routine cleaning. Specify B&G Model MBV-1 Rolairtrol accessory with appropriate fittings for manual blowdown.
  6. Vessel shell diameter to be three times the nominal inlet/outlet pipe diameter, with a minimum vessel volume for sufficient velocity reduction.
  7. The air separator(s) shall be painted with one shop coat of air dry enamel.
  8. The air separator must be designed, constructed and stamped for 125 psig at 375ºF in accordance with Section VIII, Division I of the ASME Boiler and Pressure Vessel Code, and registered with the National Board of Boiler and Pressure Vessel Inspectors.
  1. Sediment removal separator
  1. Furnish and install, as shown on the plans, a centrifugal type

sediment removal separator. The unit shall have ______" inlet and

outlet connections tangential to the vessel shell. Vessel shell

diameter is to be three times the nominal inlet/outlet pipe

diameter. The unit shall have a solid separation efficiency of 98%

of 200 mesh sand and water solution, and be capable of heavierthan-

water, undissolved sediment separation of at least 40

microns. The unit shall be capable of air separation and

elimination.

  1. The unit shall have a welded sump at the bottom to collect

sediment separated out by centrifugal action. Connections are to

be provided by the contractor to purge the unit of collected

sediment either manually or automatically.

  1. The sediment removal separator must be designed, constructed

and stamped for 125 psig @ 350 °F in accordance with Section

VIII, Division I of the ASME Boiler and Pressure Vessel Code, and

registered with the National Board of Boiler and Pressure Vessel

Inspectors.

  1. A manufacturer's Data Report for Pressure Vessels, Form U-1 as

required by the provisions of the ASME Boiler and Pressure

Vessel Code shall be furnished for each sediment removal

separator upon request.

  1. Each sediment removal separator shall be ITT Bell & Gossett

Model No.______for ______GPM.

  1. Coalescing removal separator
  1. Furnish and install, as shown on plans, a coalescing medium type air

and dirt separator. The unit shall have _____" flanged inlet and outlet

connections in line with the centerline of the vessel shell. The unit

shall have an internal stainless steel coalescing medium with

3/16" (4.8 mm) perforations and 51% open area designed to remove

entrained air and direct it to the compression tank (air control

system) or air vent (air elimination system) at the top of the unit and

remove suspended sediment and direct it the blow down valve at the

bottom of the unit.

  1. blow down valve and skim valve shall be provided to facilitate

routine cleaning.

  1. Vessel shell diameter to be two times the nominal inlet/outlet pipe

diameter, with a minimum vessel volume for sufficient velocity

reduction

  1. The air and dirt separator must be designed, constructed and

stamped for 125 psi (862 kPa) @ 450ºF (232ºC) in accordance with

Section VIII, Division I of the ASME Boiler and Pressure Vessel

Code, and registered with the National Board of Boiler and Pressure

Vessel Inspectors. The air and dirt separator(s) shall be painted with

one shop coat of B&G red air dry enamel.

  1. Each air and dirt separator shall be Bell & Gossett Model No. _____

Coalescing Removal Separator for ______GPM ( ______m3), Shell

Diameter. ______" (______mm) and ______psi (______ft)

pressure drop.

ITT

8200

  1. Enhanced air separator
  1. Furnish and install as shown on plans a straight or angle air separator

designed to effectively separate free air in hydronic heating/cooling

systems. The air separator shall be heavy duty cast iron designed to

function satisfactorily at working pressures up to 150 psi (10.3 bar) and

liquid temperatures up to 250ºF (121ºC). The air separator shall have

an internal diffuser and a coalescing medium design that will trap and

collect air bubbles to be released at the top of the separator.

  1. NOTE: Choose either A or B to complete this specification.
  1. For Use with Conventional Compression Tanks:

The Enhanced Air Separator shall eliminate free air in the system by

directing the air to a conventional compression tank. The Enhanced Air

Separator shall allow expansion of the system fluid to be directed to

the compression tank.

  1. For Use with Precharged Bladder & Diaphragm Expansion Tanks:

The Enhanced Air Separator shall also assist in eliminating free air

from the system by directing the air to a large capacity air vent while

deaerated water is circulated to the system. The Enhanced Air

Separator shall allow expansion of the system fluid to be directed to a

precharged BLADDER or DIAPHRAGM (CHOOSE ONE) expansion

tank.

  1. The Enhanced Air Separator shall be ITT Bell & Gossett Model No.

EAS- ______Enhanced Air Separator.

  1. Automatic air vents
  1. Body and bonnet shall be of cast iron construction, with stainless steel, brass, and EPDM internal components (Model 107A) or non-ferrous (Model 87), suitable for a maximum operating temperature of 240°F and 150 psig working pressure.

2.3 HYDRONIC PIPING ACCESSORIES

  1. Subject to compliance with requirements below, provide fittings from one of the following manufacturers:
  2. Basis of design: Flex-Hose Company, Inc.
  3. Other pre-approved manufacturer.
  1. Stainless steel bellow flexible connectors
  2. Construction shall be of annular corrugated stainless steel close-pitch hose (made in USA) with stainless steel overbraid (made in USA).
  3. The corrugated metal hose, braid(s), and a stainless steel ring-ferrule/band (material gauge not less than .048") must be integrally seal-welded using a 100% circumferential, full-penetration TIG weld.
  4. End fittings shall be flat-face plate steel flanges with 150# ANSI drilling and outside diameter, carbon steel schedule 40 male NPT thread, or carbon steel schedule 40 square-cut/roll grooved to match piping connections. Fittings must be attached using a 100% circumferential TIG weld.
  5. Braided stainless steel pump connector(s) shall be suitable for operating temperatures up to 850 ºF.
  6. The rated working pressure of the braided metal hose shall have a minimum 4:1 safety factor.
  7. Each braided stainless steel pump connector shall be individually leak tested by the manufacturer using air-under-water or hydrostatic pressure.
  8. Flanged pump connectors shall be prepared for shipment using cut-to-length spacers, securely positioned between the flanges to prevent axial compression damage and maintain the manufactured length. Spacers must be removed prior to system start up.
  1. Spherical rubber flexible connectors
  2. Provide molded single or double arch spherical connector/expansion joint(s).
  3. The molded spherical body shall be manufactured using multiple plies of nylon tire cord fabric bonded within the neoprene elastomer (to avoid exposure to atmosphere or media) or EPDM and shall be reinforced with a spring steel wire.
  4. Floating/rotatable flanges shall be zinc-coated plate steel and must have drilled bolt holes in accordance with ANSI 150# standard.
  5. The rated design pressure of the molded body shall have a minimum 3:1 safety factor (burst to operating pressure) based on a maximum operating temperature of 220 ºF, and must also be capable of 26" Hg vacuum.
  6. Double arch units shall have exterior galvanized ductile iron reinforcing ring between sphere arches to maintain double profile.
  1. Expansion loops
  2. Construction to be 3 equal length sections of annular corrugated stainless steel (or bronze) close-pitch hose (made in USA) with stainless steel (or bronze) overbraid (made in USA) that will absorb or compensate for pipe movements in all 6 degrees of freedom (3 coordinate axes, plus rotation about those axes) simultaneously.
  3. The corrugated metal hose, braid(s), and a stainless steel ring-ferrule/band (material gauge not less than .048") must be integrally seal-welded using a 100% circumferential, full penetration TIG welds. End fittings shall be selected per application. Fittings must be attached using a 100% circumferential TIG weld.
  4. Braided stainless steel loops shall be suitable for operating temperatures up to 850 degrees F. Braided bronze loops shall be suitable for operating temperatures up to 400 degrees F
  5. Loops must be designed for pressure testing to 1.5 times their maximum rated working pressure and a minimum 4:1 (burst to working) safety factor.
  6. Each braided loop shall be individually leak tested by the manufacturer using air-under-water or hydrostatic pressure.
  7. Loops shall be prepared for shipment using a cut-to-length metal shipping bar, tacked securely between the elbows of the two parallel legs, to maintain the manufactured length during shipping. Shipping bar must be removed prior to system start-up.
  8. An appropriate hanger assembly kit shall be used to support and hang the loop. The hanger assembly shall be UL Listed Seismic Wire/Cable assemblies conforming to the requirements of the ASCE (American Society of Civil Engineers) guidelines for structural applications of wire rope, in that the cable is pre-stretched and the permanent end fittings maintain the break strength of the cable with a safety factor of two.
  9. The pre-manufactured flexible loop shall be installed and guided following the manufacturer's printed installation instructions.
  1. HYDRONIC SPECIALTIES
  1. Safety relief valves
  1. Furnish and install as shown on plans a diaphragm operated

Safety Relief Valve, ASME labeled for relieving pressure of psig

_____ with a rating of ______BTU/Hr. The fluid should not

discharge into the spring chamber. The valve should have a low

blow-down differential.

  1. The valve seat and all moving parts exposed to the fluid are to be

of non-ferrous material.

Manufacturer ITT Bell & Gossett Model No. ______ASME

Safety Relief Valve set at ______psig, rated at

______BTU/Hr.

  1. Pressure reducing valves
  1. Furnish and install as shown on plans, a diaphragm operated Pressure

Reducing Valve with brass body, low inlet pressure check valve and inlet

strainer. The strainer must be easily removed without system shutdown.

  1. The valve seat, strainer and stem must be removable and of non-corrosive

material.

  1. ITT Bell & Gossett, No. ______. Set @______lbs.
  1. HYFAB make up assembly
  1. Includes Bell and Gossett safety relief valve and pressure reducing valve.
  2. The unit shall have shutoff ball valves.
  3. A pressure gauge will be included to monitor system pressure.
  4. Includes a dielectric nipple so that dissimilar metals may be connected without corrosion.
  5. All of the above components shall be factory assembled and tested as a complete unit.

2.5HYDRONIC BALANCE

  1. Circuit Setter valve
  1. Valve is designed to allow installer to pre-set for proportional system balance prior to start-up.
  2. Shall be of bronze body/brass ball construction with glass and carbon filled TFE seat rings.
  3. Differential pressure read-out ports across the valve seat area.
  4. Valve shall have a NPT tapped drain port.
  5. Designed for maximum working pressure of 175 psig at 250°F.
  1. Circuit Sentry valve
  1. +/- 5% accuracy across full differential pressure range.
  2. Valve housing shall be of brass construction with EPDM O-rings.
  3. Unit shall have a differential pressure range from 2 psi to 60 psi.
  4. Read out ports with internal checks.
  1. OPTIFLO control valve
  1. Pressure independent electronically actuated valve.
  2. Externally adjustable balancing valve with a full modulating control valve.
  3. Modulating control with full authority regardless of any fluctuations in differential pressure.
  4. Integrated pressure/temperature ports.
  1. Coil Hook-up kit
  1. Coil hook-up kit shall include components which are required for commissioning a terminal unit.
  2. Includes the following components:
  1. Combination wye strainer and shut off valve with one pressure/temperature port, drain valve, tailpiece and union end.
  1. Union accessory with one pressure/temperature port, manual air vent, tailpiece and union end.
  1. Circuit Sentry automatic flow limiting, commissioning and shut-off valve with two pressure/temperature ports, tailpiece and union end.
  1. Flexible hose connectors (optional)

PART 3 – EXECUTION

3.1 EXAMINATION

  1. Examine areas, equipment foundations, and conditions, for compliance with requirements for installation tolerances and other conditions affecting performance.
  2. Examine rough in for piping systems to verify actual locations of piping connections prior to installation.
  3. Correct unsatisfactory conditions prior to installation of equipment.

3.2 INSTALLATION

  1. General: Comply with the ANSI/HI 1.4-2000 and manufacturer's written installation and alignment instructions.
  2. Install equipment in locations and arranged to provide access for periodic maintenance, including removal of accessories.
  3. Support devices and piping separately so that the weight of the piping system does not rest on the pump.
  4. Refer to the drawings for details of installation of accessories.
  5. Perform start-up procedures per manufacturer’s instructions.
  6. Install air separator on suction side of pump, or as shown on system diagram.
  7. Install air vents at system high points and as shown on system diagram.
  8. Support expansion tanks and compression tanks with sufficient structural support for weight of tank, fittings and connections, in addition to the weight of the water when the tank is full.

3.3 ADJUSTING AND CLEANING

  1. A copy of the balance report shall be included in the operating and maintenance manual.

END OF SECTION 23 2113.43

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