MILWAUKEE VALVE 3955789 Cast Iron Flanged Swing Check Valve Instructions
- June 13, 2024
- MILWAUKEE VALVE
Table of Contents
MILWAUKEE VALVE 3955789 Cast Iron Flanged Swing Check Valve
Product Information
The product is a cast iron gate, globe, and check valve. It is designed to control the flow of fluids through a pipeline and is manually operated.
Operation
- Gate and globe valves: To open the valve, turn the handle in a counterclockwise direction. To close the valve, turn the handle in a clockwise direction.
- Check valves: These valves are automatic and do not require manual operation.
Inspection & Maintenance
- Periodic inspection and preventative maintenance are not required, except for adjusting the stem packing and cycling the valve from open to closed position.
- If a valve develops a packing leak, adjust the packing gland nut to increase the pressure on the stem packing. Turn the packing nuts clockwise approximately 1/4 turn or until the leakage stops. Do not attempt to repack the valve under pressure.
- Whenever a new stem is installed, the packing should be changed as well.
Repair Parts
Under normal conditions, repair parts are not required. However, the following parts may be considered recommended spare parts:
- Gate Valves: Packing
- Globe Valves: Packing
- Check Valves: None
When ordering parts, provide the figure number of the valve, size, part
needed, and age of the valve.
Note : This information is based on Revision 1 of the manual.
INSTALLATION
- Thoroughly clean and prepare the piping system before valve installation.
- Remove the valve end caps if present, and inspect the valve ports and seating surfaces for cleanliness just prior to installation.
- Support the valve to prevent unnecessary stresses induced by connecting pipe.
- Be sure the rating of the valve is compatible with the intended service conditions. Recommended aptitude is with the stem in the vertical position. Horizontal stem installations can present issues for larger valves, especially in reduced pressure service such as low pressure(5-35 psi) steam.
- Bolt flange in line per recommendations of applicable ASME/ANSI standard, e.g. ASME/ANSI B16.1. Use full face gaskets.
- Operate the valve from the full open to closed position.
- Verify the tightness of the packing nut/gland after installation.
- Recommended installation: Stem in the vertical position with operator on top.
NOTE 1 : For gear operated valves: The valve is normally shipped with the
handwheel loose, the installing contractor or mechanic must take care to
ensure the roll pin that holds the handwheel to the input shaft of the gear
operator is installed completely, and is balanced on both sides of the
handwheel.
The fit of the pin in the handwheel and the shaft is controlled and should
provide years of reliable service.
NOTE 2 : Make sure check valves are oriented properly for flow and
gravity effect, and that they are sufficiently distant from pump outlets or
other turbulence inducing devices. See Product Bulletin, Check Valves for
minimum flow rates and installation locations.
NOTE 3 : Check valves may be shipped with internal packaging to prevent
disc damage in transit. Remove any packing material prior to installation.
OPERATION
- Gate and globe valves are manually operated. To open, turn the handle in a counterclockwise direction. To close, turn the handle in a clockwise direction.
- Check valves are automatic.
INSPECTION & MAINTENANCE
- Periodic inspection and preventative maintenance is not required other than adjustment of stem packing, and cycling of the valve from open to closed position.
- If a valve develops a packing leak, adjust the packing gland nut to increase the pressure on the stem packing. The packing nuts should be turned in a clockwise direction approximately 1/4 turn, or until the leakage stops. Do not repack under pressure.
- Whenever a new stem is installed, the packing should be changed also.
REPAIR PARTS
Under normal conditions, repair parts are not required. Parts that may be considered recommended spare parts are as follows:
- Gate Valves-Packing
- Globe Valves-Packing
- Check Valves-None
When ordering parts provide the figure number of the valve, size, part needed and age of the valve.