Installation and Operating Manual
Cast Iron Gate Globe and Check Valves		  
Installation and Operation

1 Piping systems and valves should be thoroughly cleaned and free from ingress of foreign materials.
2 Visually inspect the valve seating and ports for cleanliness immediately prior to installation.
3 All valves should be independently supported against movement and stress from the connected piping system.
4 Ensure that the valve pressure rating is compatible with service conditions
5 Operate the valve at least once from the open to closed position.
6 Verify that packing nuts are tight before pressurizing the system
7 Check valves must be oriented properly for flow and gravity and must be installed sufficiently distant from pumps or other
devices producing turbulence.
8 Gate valves are not suitable for throttling applications.
9 Gate valves should be installed in the vertical position on horizontal pipework and in the horizontal position on vertical
pipework.
Operation
Gate and globe valves are manually operated multi-turn valves and are opened by a handwheel or other operating device,
generally in a clockwise direction and then closed counterclockwise. Gate valves with counterclockwise opening should be
clearly identified to ensure safe operation Check valves operate automatically.
Installation and Operation
1 Valves should be inspected periodically and should be cycled to prevent buildup of foreign materials in the piping system
and valve body.
2 In the event of a packing leak adjust the packing nuts to increase pressure on the stem packing. Packing nuts should be
tightening evenly approximately a quarter turn in a clockwise direction.
3 Always shut down the system before repacking the valve. Valves are designed with backseats for repacking under
pressure but this is not recommended.
Silent Check Valves
Designed to automatically prevent reverse flow into the piping system. Installation procedures are as above with the arrow in
the direction of flow.
Inspection and removal procedures
Close the isolating valve on the discharge side. Bleed system pressure from the discharge flange Do not loosen the flange
bolts on the inlet sideuntil system pressure is relieved as damage may occur to the valve Remove Valve from the line and
inspect internal parts for wear and tear. Do not attempt to inspect by removing the inlet side pipe as this will result indamage to
the valve.
For spare parts consult “MATERIALS” in the Fivalco catalogue.