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General| Brand | Farris Engineering |
|---|---|
| Model | 27DA23-M20 |
| Category | Control Unit |
| Language | English |
Explains the Farris Series 2700 valve type numbering system and its components.
Lists parts and standard materials for the Series 2700 valve construction.
Details available accessories and their material specifications for different valve constructions.
Provides step-by-step instructions for safely dismantling Farris Series 2700 valves.
Explains the procedures for disassembling open and packed lifting lever assemblies.
Details the process and requirements for refacing valve bodies, including machining and finish.
Outlines the procedure for relapping metal and Teflon discs to ensure proper sealing.
Lists Farris Lapping Compounds by part number, grade, finish, and size for valve lapping.
Describes the overall testing process, including set pressure, seat leakage, and backpressure tests.
Details the procedure for setting and verifying the valve's opening pressure using appropriate test fluids.
Explains how to perform a seat leakage test to verify valve tightness for different service types.
Outlines the backpressure test procedure for valves discharging to closed systems.
Provides guidance on recording valve data, proper installation, and storage to ensure effective future use.
Provides critical dimensions for valve discs and bodies used in lapping and refacing procedures.
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