Supply and Delivery, Flap Gates

REQUEST FOR QUOTATIONS

SPECIFICATIONS OF GOODS AND SCOPE OF SERVICES
The Contractor shall furnish all necessary labour, materials, supplies, and transportation necessary to supply and deliver the Good(s) and any spare parts and performance of the Services in accordance with this Agreement.

Steel Flap Gates shall meet the requirements specified below:
• Zero Leakage preferred – (if this can’t be achieved, provide leakage rate).
• Gates shall have circular openings. Similar installations shall have operated successfully for five years or more ASTM F 667 and/or CSA B 182.8.
• Flap gates shall close whenever the positive pressure is higher than the negative pressure. They shall open whenever the negative pressure is higher than the positive pressure.
• The Flap gates shall be designed to withstand the 4 m design head.
• Flap gates shall be constructed entirely of stainless steel. All hardware shall be stainless steel.
• The frame shall be made of structural members or formed plate welded to form a rigid one-piece frame. The frame shall be of the flange back design suitable for mounting on a headwall.
• The mechanical sleeve type, or spigot back type, or slip on type shall be used to adapt the flap gate to a round pipe.
• The gate cover shall be made of structural members or formed plate adequately reinforced to withstand the maximum specified seating head without distortion.
• The cover shall be one piece with necessary reinforcing ribs, a lifting eye for manual operation, and with bosses to provide a pivot point connection with the links.
• Seals shall be made of resilient neoprene attached to the body by means of a retainer ring for flaps.
• Hinges shall consist of a stainless steel pin and shall have a UHMWPE bushing.
• Hinge arms shall be made of structural members or formed plates. Gates 762 mm and over in diameter shall have a 2-hinge arm arrangement, with 2 pivot joints per arm, an adjustable lower pivot with limited rotation and an adjustable upper hinge lug arrangement to permit adjustment of the gate opening sensitivity to unseating head.

ADDENDA
If the City determines that an amendment is required to this RFQ, the City Representative will issue a written addendum by posting it on the BC Bid Website at www.bcbid.gov.bc.ca and the City Website at www.surrey.ca (collectively, the “Websites”), and upon posting, any addenda will form part of this RFQ. It is the responsibility of Contractors to check the Websites for addenda. The only way this RFQ may be added to, or amended in any way, is by a formal written addendum. No other communication, whether written or oral, from any person will affect or modify the terms of this RFQ or may be relied upon by any Contractor. By delivery of a Quotation, the Contractor is deemed to have received, accepted and understood the entire RFQ, including any and all addenda.

All inquiries related to this RFQ should be directed in writing to purchasing@surrey.ca.