Attachment 1 NWFSC filter specifications 8-26.pdf

Manchester Seawater, Equipment Specifications:

General Requirements:

• Equipment shall be shipped and delivered to Manchester Washington. All shipping and delivery costs shall be included in equipment pricing. Vendor shall schedule delivery with COR at least 30 days prior to delivery.

• Delivery must be completed within 270 days of award; installation by third party will be the responsibility of NWFSC. Additional support and site visits to be coordinated with COR within one year of award.

• All components (drum filters, debris screens, and aeration system) shall be provided by the same supplier as part of an integrated filtration system. The supplier shall be responsible for designing the equipment to operate together as fully functional filtration system, with the debris screen removing large debris and the drum filter providing fine filtration.

• System shall be delivered in a state appropriate for outdoor storage pending installation.

Inspection/Acceptance may be delayed until installation, and will not be complete until written acceptance by COR. Full performance warranty must be at least one year following installation.

• Required submittals:

o Submit general product data, dimensional shop drawings, electrical wiring diagrams, materials of construction for all components including accessories and spare parts o Submit capacity ratings for drum filters and debris screen for the following conditions:

▪ 10-micron filtration with 25 mg/l TSS loading

▪ 20-micron filtration with 25 mg/l TSS loading o Submit capacity of overflow (filter occluded condition) o Submit capacity of filter tank (when operating with 20- and 30-micron screens) o Submit operating power requirements o Submit Operating Hydraulic profile for the drum filter and debris screen system under:

▪ Normal operation with clean filter screens

▪ Normal operation with dirty filter screens

▪ Operation under emergency overflow (filter screens occluded) at 1500 gpm and

2500 gpm o Submit drum filter backwash water consumption (gpm) when backwash pump is running o Submit drum filter hot water consumption (gpm) when cleaning with the hot water rinse system o Submit description of drum filter controls and alarms o Submit shipping and operating weights of all equipment

Drum Filters:

• Number of Filters: 3

• Flow @ 10-micron filtration: 1500 gpm (Manufacturer Rating @ 10 micron)

• Screens: 10 microns

• Fluid: Seawater

• Fluid TSS: ` 25 mg/l

• Configuration: Tank Mounted with internal level control pan and emergency overflow weirs

• Hydraulic Capacity of Tank: 2506 gpm

• Hydraulic Capacity of Filter Overflow: 2506 gpm

• Materials of Construction: Plastic and Grade 2205 Duplex Stainless Steel (no exceptions)

• Connectors (nuts, bolts, washers): Grade 2205 Duplex Stainless Steel (no exceptions)

• Backwash Pump: Unit Mounted (skid mounted pumps not allowed)

• Backwash Systems:

o For Normal Operations: Moving Spray-bar (35 gpm max) o Hot Water: Separate Moving Spray-bar (2.2 gpm max)

• Backwash Water Strainer: 2” diameter minimum

• Backwash Strainer Mesh: As recommended by mfr.

• Water Inlet: 16” diameter, flanged end

• Water Outlet: 16” diameter flanged end

• Backwash Outlet: 4” diameter, plane end

• Power: 480V, 3 phase

• Controls:

o Mounting: Unit Mounted o Power Connection: Single Point Power Connection o Surge Protection: Provide lightning protection o Operating Modes:

▪ Continuous Drum Rotation with Intermittent Backwash

▪ Timed Backwash and Cleaning Operation

▪ Backwash based on upstream water level

▪ Hot water cleaning o Alarms:

▪ Horn and Strobe

▪ Alarm on High Level

▪ Provide dry contact for connection to an alarm dialer

• Spare Parts:

o Extra set of 10-micron screens for two filters o (5) sets of 20-micron screens (sufficient for in installation on five screens) o (1) extra set of backwash nozzles (for one filter) o (1) drum drive motor o (1) backwash pump o (2) backwash strainer baskets o (1) moving spray-bar motor o (1) hot water moving spray-bar motor o (1) drive chain o (1) set of drum seals o (1) set of drive bearings

• Accessories (provided by filter supplier) o Portable water heater for hot water cleaning system (120 V, 20 amp, for use with municipal water). The system shall be capable of providing high pressure water at 122-degree F water to the hot water cleaning system.

o Spreader Bar for removal of drums

• Manufacture Support:

o (3) day start up and training after installation by third party o (1) day follow up visit after installation by third party

Debris Screens:

• The debris screens shall be set up to allow adjustment and fine-tuning by the Government during startup and commissioning to minimize water loss to the dewatering chute. The final product shall be set up to have a water loss of 5 gpm or less per screen when operating at 1200 gpm.

• Number of Debris Screens: 3

• Flow: 1500 gpm

• Screen Slots: 1.75 mm

• Fluid: Seawater with 35 ppt salinity

• Fluid Debris: ` Barnacles, Sea Grass, Muscles, Fish

• Configuration: As indicated on configuration drawings unless approved by engineer.

• Materials of Construction: Grade 2205 Duplex Stainless Steel (no exceptions)

• Connectors (nuts, bolts, washers): Grade 2205 Duplex Stainless Steel (no exceptions)

• Water Inlet: 16” diameter, plane end

• Water Outlet: 16” diameter, plane end

• Drain: 3” diameter, NPT

• Dewatering Chute Drain: 4” diameter, plane end

• Spare parts: (1) extra screen and screen hold downs

• Manufacture Support:

o (3) day start up and training after installation by third party o (1) day follow up visit after installation by third party

Aeration System:

• Number of Aeration Modules: 2

• Rated capacity: 1200 gpm per module

• Hydraulic Capacity: 1500 gpm or greater per module

• Fluid: Seawater

• Water Inlet: (2) 10” Flanges per Aeration Module

• Configuration:

o Maximum footprint dimensions (each module):

▪ Width: 40”

▪ Length: 70”

▪ Overall Height: 68” o Each Module to have (8) 16” diameter (+/-) aeration columns o Columns shall be removable by a single person for cleaning o Each Module shall include the support framework and distribution piping to the aeration columns

• Materials of Construction:

o Module Frame: Grade 2205 Duplex Stainless Steel (no exceptions) o Aeration Columns: Polyethylene or approved equal o Pipe: Polyethylene, PVC, or Fiberglass

• Connectors (nuts, bolts, washers): Grade 2205 Duplex Stainless Steel (no exceptions)

• Spare parts: (8) Aeration Columns

8 5

(M A

X

2' - 4" (MAX)

3' - 8" (MAX)

6' - 0" (MAX)

M

A X

CL

CL

ABOVE

BELOW

GENERAL NOTES

1. DEBRIS SCREEN STRUCTURE SHALL BE

CONSTRUCTED OF DUPLEX STAINLESS STEEL

2. ALL CONNECTORS (NUTS, BOLTS AND WASHERS)

SHALL BE CONSTRUCTED OF DUPLEX STAINLESS

STEEL

3. ALL GASKET MATERIALS USED SHALL BE SUITABLE

FOR USE WITH SEA WATER.

4. FABRICATION DIMENSIONS NOTED AS “MAX” MAY BE

SMALLER THAN SHOWN.

5. THE MAXIMUM WATER LEVEL NOTED OCCURS IF

FILTER IS CLOGGED AND WATER OVERFLOWS THE

EMERGENCY BYPASS WEIR IN THE FILTER TANK.

THE BASE OF THE DEBRIS SCREEN (ITEM 1) SHALL BE

SET AT A MINIMUM OF 3” ABOVE THE MAXIMUM

WATER LEVEL NOTED.

1. DEBRIS SCREEN. CONFIGURATION AND DESIGN TO

BE PROVIDED BY MANUFACTURER AND SHALL BE

SUITABLE TO PASS UP TO 1500 GPM. DEBRIS

SCREEN SHALL BE REMOVABLE FOR ACCESS FOR

CLEANING COLLECTION SUMP

2. DEWATERING CHUTE. DEWATERING CHUTE SHALL

BE DESIGNED BY MANUFACTURE TO DEWATER ANY

RESIDUAL WATER PASSING WITH DEBRIS. THE

CHUTE SHALL BE ADJUSTABLE FOR FINE TUNING

AND DESIGNED TO DROP DEBRIS INTO COLLECTION

BOX SUPPLIED BY OWNER.

3. 16” INLET WITH PLANE END CONNECTION SUITABLE

FOR CONNECTION TO PIPING WITH A FLEXIBLE

COUPLING. HEIGHT OF INLET PIPE AS DESIGNED BY

MANUFACTURER.

4. 16” OUTLET WITH PLANE END CONNECTION

SUITABLE FOR CONNECTION TO PIPING WITH A

FLEXIBLE COUPLING. OUTLET PIPE HEIGHT SHALL

MATCH ELEVATION OF FILTER INLET.

5. 3” TANK DRAIN WITH NPT CONNECTION

6. 4” DEWATERING CHUTE OUTLET WITH PLANE END

CONNECTION

7. HINGED OR REMOVABLE TOP COVER TO ALLOW

ACCESS FOR CLEANING INLET UPWELL.

8. ADJUSTABLE MOUNTING LEGS WITH PROVISIONS

FOR ANCHORING.

9. CONCRETE EQUIPMENT PAD BY OTHERS, HEIGHT AS

RECOMMENDED BY EQUIPMENT MANUFACTURER.

KEY NOTES

DATE

FIGURE

DEBRIS SCREEN

06/17/22

1/2" = 1'-0"

DEBRIS SCREEN ELEVATION

21/2" = 1'-0"

DEBRIS SCREEN PLAN

6" 12"0" 48"24"