FEBCO 805YD DuraCheck In-Line Design Double Check Valve Assemblies User Manual

Installation instructions, Double check detector assemblies, Sizes

IS-F-805Y/805YD/806YD

I N S T A L L A T I O N I N S T R U C T I O N S

Installation Instructions

1. Consult local codes for specific installation requirements and restrictions

applicable to your area. It is recommended that system supply pressure

be at least 20psi (138 kPa).

2. These instructions apply only to Series 805Y sizes

⁄

" – 2" (20 – 50mm),

805YD sizes 2

⁄

" – 10" (65 – 250mm), and 806YD sizes 3" – 10"

(80 – 250mm). The valves may be installed only in the orientation/flow

directions as shown. The gate valves may be rotated, as permitted by

the flange bolt pattern, on vertical installations only.

3. The valve assembly must be installed where it is accessible for periodic

testing and maintenance. Clearances shown in the installation views

apply to exterior, interior and pit/vault installations and are only recom-

mendations. These minimums do not apply to removable protective

enclosures. Refer to local codes for actual requirements in your area.

4. PRIOR TO INSTALLING THE VALVE INTO THE LINE, FLUSH THE

SUPPLY LINE OF ALL FOREIGN MATERIAL. Failure to flush the

supply line may cause the check valves to become fouled and require

disassembly and cleaning.

5. Lift the assembly by the valve body. DO NOT LIFT THE ASSEMBLY

BY CONNECTING TO THE VALVE HANDLES, STEMS, OR

BYPASS PIPING. On 2

⁄

" – 10" (65 – 250mm) units lift eyes are bolted

to the check covers.

6. After installation SLOWLY fill the assembly with water and bleed air

from the body using the # 2, # 3 and # 4 test cocks. Test the valve

assembly to ensure correct operation.

NOTE: All assemblies are tested at the factory for proper operation and

leakage. If the valve does not pass the field test, it is most likely due to

a fouled check valve. This is not covered by the factory warranty. The

valve cover(s) must be removed and the check seats inspected and

cleaned. Any damage or improper operation caused by pipeline debris

or improper installation/start-up is not included in the factory warranty.

In case of a possible warranty claim, contact your local supplier or

FEBCO Representative. DO NOT REMOVE THE VALVE ASSEMBLY

FROM THE PIPELINE.

7. The assembly must be protected from freezing and excessive pressure

increases. Pressure increases can be caused by thermal expansion or

water hammer. These excessive pressure situations must be elimi-

nated to protect the valve and system from possible damage.

8. Plastic testcock plugs and tethers are provided for the Series 805Y

(loose in box) for areas that require them.

Series 805Y, 805YD, 806YD

Double Check Detector Assemblies

Sizes:

⁄

" – 10" (20 – 250mm)

6" (150mm) Min

12" (300mm) Min

Horizontal Installation for the DC Series 805YD

(Top View, Shown with Strainer)

Horizontal Installation for the Series 805YD

(Top View, Shown with Strainer)

Flow

Figure 1

Figure 2

18" (450mm) Min