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General| Brand | UNITED |
|---|---|
| Model | 7700 Series |
| Category | Control Unit |
| Language | English |
General instructions for inspecting valves upon delivery and protecting them from weather and debris.
Lists essential tools and equipment required for safe and proper valve handling and installation.
Guidance on valve placement in horizontal and vertical pipework, emphasizing support and strain avoidance.
Details on preparing pipe ends, installing the valve, and ensuring piping support to avoid line stress.
Instructions for tightening nuts and bolts using standard wrenches in a crisscrossed pattern for balance.
Explanation of how the swing check valve opens and closes based on upstream and downstream pressure differentials.
Warning against using external levers, weights, or springs for manual valve operation or restriction.
Recommends semi-annual inspections and lists key points for checking leakage and bolt tightness.
Provides solutions for end joint leakage, cover gasket leakage, and seat leakage.
Lists quantities of essential spare parts per valve, including seat rings and gaskets.
States that lubrication is not required for normal operation but advises referring to maintenance summaries.
Details the warranty coverage, exclusions, and the process for obtaining service or additional information.
Provides contact information for warranty service and lists items not covered by the extended warranty.
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