Febco 850-200 Installation Instructions

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.
2. These instructions apply to Series 850 (DC) and 850U (DC) sizes
(15-50mm) only. The valves may be installed only in the orientation/flow
direction shown.
3. The valve assembly must be installed where it is accessible for periodic
testing and maintenance. The recommended clearances shown in the
installation views apply to the exterior, interior and pit/vault installations.
These minimums do not apply to removable protective enclosures.
4. PRIOR TO INSTALLING THE VALVE INTO THE LINE, FLUSH THE
SUPPLY LINE OF ALL FOREIGN MATERIAL. Failure to flush the sup-
ply line may cause the check valves to become fouled and require disas-
sembly and cleaning.
5. After installation, SLOWLY fill the assembly with water and bleed air
from the body using the # 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 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.
6. 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 eliminated
to protect the valve and system from possible damage.
7. Plastic test cock plugs and tethers are provided (loose in box)
for the / " to 2" (15-50mm) product for those who want to use them.
1
2
Double Check Valve Assemblies
/ " to 2"
1
2
Service and Maintenance
1. Rinse all parts with water prior to re-assembly.
2. DO NOT USE ANY PIPE DOPE, OIL, GREASE OR SOLVENT ON
ANY PART UNLESS INSTRUCTED TO DO SO.
3. Do not force parts. Parts should fit together freely. Excess force may
cause damage and render the assembly inoperable.
4. Carefully inspect the seals and seating surfaces for debris or damage.
5. Test the assembly after servicing to ensure proper operation.
Check Valves Disassembly
1. Close inlet and outlet ball valves. Bleed residual pressure by opening
No. 2, 3, and 4 test cocks. Allow the test cocks to remain open until
the re-assembly is complete. Test cock No. 1 should remain closed.
2. Remove cover bolts using the appropriate size wrench.
3. Remove spacer by grasping the flanged end of the spacer and pulling
straight up.
4. Remove the inlet check assembly by pulling it in the direction of flow
out from the body bore until it is completely exposed then lift out of the
body.
5. Remove the outlet check assembly by placing the tip of a medium size,
flat nose screwdriver in the slot of the seat and prying the check assem-
bly back until the red O-ring is exposed. Then using your fingers, pull it
out of the body bore until it is completely exposed then lift it out of the
body.
IS-F -850DC
Series 850
Sizes: ⁄ " - 2" (15 – 50mm)
1
2
850