Rovalve S20
Installation and Maintenance Instructions
Tyco reserves the right to change the contents without notice
page 4
4. Spare parts
1. The following spare parts are recommended:
Valves:
1- Set replacement packing
Cylinder Operator (if applicable):
1-Repair Kit
2. When ordering replacement parts for a ROVALVE product or cylinder operator, please include
valve or cylinder size and complete description including serial number with your request.
3. Additional replacement parts such as handwheels, stem nut assemblies, retainers, 4-Post Yoke,
stems, packing glands, and gates are available from factory. Again, please provide complete
description with serial number when ordering.
Note:
Stem Nut assemblies include the #1 retaining nut and #2 stem nut.
Figure 6
Stem
Stem nut
(under retainer)
Grease
fitting
Packing
gland
Packing
Figure 8
Figure 7
Body
Gate
Packing
gland
Handwheel
Stem Assy.
#1 Retaining nut
#2 Stem nut
Retainer
Retainer bolt
4-Post yoke leg
Packing
Grease fitting
3. General maintenance
We recommend that all ROVALVE products be inspected at least every 60 days. The following
points should be examined and corrected as required (see Figure 6):
1. Valve stems, extension stems, and stem nut:
Look for excessive corrosion, galling or lack
of lubrication. If valve stem requires lubrication, utilize the grease fitting provided and pump
standard bearing grease through the yoke hub to lubricate the stem and stem nut assembly.
Additional lubrication may be applied directly onto stem or stem threads. (Use material which
meets ASTM 4950 GBLB.)
2. Packing gland:
Check for leaks or worn packing. If leakage is occurring around the packing
gland, equally tighten the packing gland nuts, being careful not to overstress the bolting. If the
valve requires repacking, you may use any standard square braided packing as suitable for your
service. See additional instructions for repacking.
3. If possible stroke the valve through the full open and closed position to make sure it is
functioning properly.
Note 1:
Stop all small leaks as soon as possible as considerable damage can be done to the
valve and the surrounding area if leakage is allowed to continue to grow.
Note 2:
Replacement parts including handwheel and yoke assemblies, gates, packing glands,
seats and packing can be provided from our factory. If valve requires further repair,
please contact our office for an estimate of feasibility and cost of repair.
