Farris Engineering Curtiss-Wright 2600 Series, Руководство по обслуживанию

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Table of Contents
Introduction & Safety Tips ..........................................................................1
2600 Series Disassembly Instructions .......................................................2
2600 Series Cutaway Drawing ..................................................................3
Threaded Valve Disassembly Instructions ..................................................4 Threaded Valve Cutaway Drawings ............................................................5
Test Lever Assemblies ...............................................................................6
Cleaning & Lapping Procedures .................................................................7
Testing Procedures ................................................................................ 8-9
1. Introduction
This Maintenance Manual is intended to present information you will
require to keep your Farris valves in proper working order. Generally,
maintenance becomes necessary as a result of dirt or scale in the lines,
exposure to service conditions, or improper installation.
This manual is designed to provide basic maintenance and repair
information for all Farris spring loaded ASME Section VIII Pressure Relief
Valves. In all cases, repairs should only be performed by personnel who
have received proper training. Training programs designed to meet your
needs can be arranged by contacting the Farris Factory.
If a valve repair requires replacement parts, only Farris manufactured
components should be used. Use of parts from other than the original
manufacturer will lead to potentially dangerous operating conditions.
When following these instructions refer to the drawing for your specific
product.
2. Safety Tips
Make sure that the Pressure Relief Valve is isolated from the pressure
source before it is removed.
Wear protective clothing when removing valves from service in order to
prevent coming in contact with any toxic or corrosive fluids which may
be trapped inside the valve.
Stand clear of the discharge side of a Pressure Relief Valve
when testing.
Pressure Relief Valves should always be installed upright in the vertical
position as the internal parts are designed to operate in this position.
Do not carry valves by the test levers.
Make sure all piping is properly supported to avoid placing excessive
stress on the body or bonnet.
3. Inspection
Upon receipt of the valve at the repair facility, a detailed examination
should be made prior to disassembly. Flange facings and threaded
connections should be examined for signs of damage or corrosion. If
possible the valve should be tested to verify its as-received set pressure.
The valve should be examined to determine if the wire seals are still in
place. These seals are designed to prevent unauthorized tampering with
external adjustments.