SECTION 23 21 16 Hydronic Piping Specialties PART 1 GENERAL 1.01 SECTION INCLUDES Unit shall be a Bell & Gossett Suction Diffuser Plus Model __-3X or __-3Z, as manufactured by Xylem. 1.02 RELATED SECTIONS Section 23 01 70 Operation & Maintenance of Central HVAC Equipment – Section 23 20 00 HVAC Piping and Pumps – Section 23 21 13 Hydronic Piping – Section 23 21 23 Hydronic Pumps – Section 23 21 23.13 In-Line Centrifugal Hydronic Pumps – Section 23 21 23.16 Base-Mounted, Centrifugal Hydronic Pumps – 1.03 REFERENCES ANSI American National Standards Institute.. – ISO International Standards Organization. – 1.04 SUBMITTALS Submit data cover sheet. Dimensional print(s). Sales bulletin. Installation, operation & maintenance manual. 1.05 QUALITY ASSURANCE The product manufacturer shall be fully certified by the International Standards Organization per ISO 9001. The manufacturer shall carry a minimum product liability insurance of $5,000,000.00 per occurrence. 1.06 MAINTENANCE MATERIAL SUBMITTALS PART 2 PRODUCTS 2.01 MANUFACTURERS Subject to compliance with these specifications, the following manufacturers shall be acceptable: Suction Diffuser Xylem Inc. Bell & Gossett Suction Diffuser Plus Model __-3X or __-3Z. Pre-approved equal. 2.02 COMPONENTS Suction Diffuser The suction diffuser body shall be made of either cast iron or ductile iron. The suction diffuser shall include a Flow Cone to eliminate recirculation and direct flow completely out of the body and into the pump suction. The suction diffuser shall include a full-length, 4-plane, removable straightening vane. The straightening vane shall be made of either carbon steel or 304 stainless steel. The suction diffuser shall include a full-length removable orifice cylinder with 3/16” perforations and 51% open area.
SECTION 23 21 16 Hydronic Piping Specialties PART 1 GENERAL 1.01 SECTION INCLUDES Unit shall be a Bell & Gossett Suction Diffuser Plus Model __-3X or __-3Z, as manufactured by Xylem. 1.02 RELATED SECTIONS Section 23 01 70 – Operation & Maintenance of Central HVAC Equipment Section 23 20 00 – HVAC Piping and Pumps Section 23 21 13 – Hydronic Piping Section 23 21 23 – Hydronic Pumps Section 23 21 23.13 – In-Line Centrifugal Hydronic Pumps Section 23 21 23.16 – Base-Mounted, Centrifugal Hydronic Pumps 1.03 REFERENCES ANSI – American National Standards Institute.. ISO – International Standards Organization. 1.04 SUBMITTALS Submit data cover sheet. Dimensional print(s). Sales bulletin. Installation, operation & maintenance manual. 1.05 QUALITY ASSURANCE The product manufacturer shall be fully certified by the International Standards Organization per ISO 9001. The manufacturer shall carry a minimum product liability insurance of $5,000,000.00 per occurrence. 1.06 MAINTENANCE MATERIAL SUBMITTALS PART 2 PRODUCTS 2.01 MANUFACTURERS Subject to compliance with these specifications, the following manufacturers shall be acceptable: Suction Diffuser Xylem Inc. Bell & Gossett Suction Diffuser Plus Model __-3X or __-3Z. Pre-approved equal. 2.02 COMPONENTS Suction Diffuser The suction diffuser body shall be made of either cast iron or ductile iron. The suction diffuser shall include a Flow Cone to eliminate recirculation and direct flow completely out of the body and into the pump suction. The suction diffuser shall include a full-length, 4-plane, removable straightening vane. The straightening vane shall be made of either carbon steel or 304 stainless steel. The suction diffuser shall include a full-length removable orifice cylinder with 3/16” perforations and 51% open area.
Suction-Diffuser-Plus.docx